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_unwatch_control_pid(Service *s) {
  67         assert(s);
  68
  69         if (s->control_pid <= 0)
  70                 return;
  71
  72         unit_unwatch_pid(UNIT(s), s->control_pid);
  73         s->control_pid = 0;
  74 }
  75
  76 static void service_unwatch_main_pid(Service *s) {
  77         assert(s);
  78
  79         if (s->main_pid <= 0)
  80                 return;
  81
  82         unit_unwatch_pid(UNIT(s), s->main_pid);
  83         s->main_pid = 0;
  84 }
  85
  86 static void service_done(Unit *u) {
  87         Service *s = SERVICE(u);
  88
  89         assert(s);
  90
  91         free(s->pid_file);
  92         s->pid_file = NULL;
  93
  94         free(s->sysv_path);
  95         s->sysv_path = NULL;
  96
  97         free(s->sysv_runlevels);
  98         s->sysv_runlevels = NULL;
  99
 100         exec_context_done(&s->exec_context);
 101         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 102         s->control_command = NULL;
 103
 104         /* This will leak a process, but at least no memory or any of
 105          * our resources */
 106         service_unwatch_main_pid(s);
 107         service_unwatch_control_pid(s);
 108
 109         unit_unwatch_timer(u, &s->timer_watch);
 110 }
 111
 112 static int sysv_translate_name(const char *name, char **_r) {
 113
 114         static const char * const table[] = {
 115                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 116                 "$network",   SPECIAL_NETWORK_TARGET,
 117                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 118                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 119                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 120                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 121                 "$time",      SPECIAL_RTC_SET_TARGET
 122         };
 123
 124         unsigned i;
 125         char *r;
 126
 127         for (i = 0; i < ELEMENTSOF(table); i += 2)
 128                 if (streq(table[i], name)) {
 129                         if (!(r = strdup(table[i+1])))
 130                                 return -ENOMEM;
 131
 132                         goto finish;
 133                 }
 134
 135         if (*name == '$')
 136                 return 0;
 137
 138         if (asprintf(&r, "%s.service", name) < 0)
 139                 return -ENOMEM;
 140
 141 finish:
 142
 143         if (_r)
 144                 *_r = r;
 145
 146         return 1;
 147 }
 148
 149 static int sysv_chkconfig_order(Service *s) {
 150         Meta *other;
 151         int r;
 152
 153         assert(s);
 154
 155         if (s->sysv_start_priority < 0)
 156                 return 0;
 157
 158         /* For each pair of services where at least one lacks a LSB
 159          * header, we use the start priority value to order things. */
 160
 161         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 162                 Service *t;
 163                 UnitDependency d;
 164
 165                 t = (Service*) other;
 166
 167                 if (s == t)
 168                         continue;
 169
 170                 if (t->sysv_start_priority < 0)
 171                         continue;
 172
 173                 /* If both units have modern headers we don't care
 174                  * about the priorities */
 175                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 176                     (!t->sysv_path || t->sysv_has_lsb))
 177                         continue;
 178
 179                 if (t->sysv_start_priority < s->sysv_start_priority)
 180                         d = UNIT_AFTER;
 181                 else if (t->sysv_start_priority > s->sysv_start_priority)
 182                         d = UNIT_BEFORE;
 183                 else
 184                         continue;
 185
 186                 /* FIXME: Maybe we should compare the name here lexicographically? */
 187
 188                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
 189                         return r;
 190         }
 191
 192         return 0;
 193 }
 194
 195 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 196         ExecCommand *c;
 197
 198         if (!(c = new0(ExecCommand, 1)))
 199                 return NULL;
 200
 201         if (!(c->path = strdup(path))) {
 202                 free(c);
 203                 return NULL;
 204         }
 205
 206         if (!(c->argv = strv_new(path, arg1, NULL))) {
 207                 free(c->path);
 208                 free(c);
 209                 return NULL;
 210         }
 211
 212         return c;
 213 }
 214
 215 static int sysv_exec_commands(Service *s) {
 216         ExecCommand *c;
 217
 218         assert(s);
 219         assert(s->sysv_path);
 220
 221         if (!(c = exec_command_new(s->sysv_path, "start")))
 222                 return -ENOMEM;
 223         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 224
 225         if (!(c = exec_command_new(s->sysv_path, "stop")))
 226                 return -ENOMEM;
 227         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 228
 229         if (!(c = exec_command_new(s->sysv_path, "reload")))
 230                 return -ENOMEM;
 231         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 232
 233         return 0;
 234 }
 235
 236 static int priority_from_rcd(Service *s, const char *init_script) {
 237         char **p;
 238         unsigned i;
 239
 240         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
 241                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
 242                         char *path;
 243                         DIR *d;
 244                         struct dirent *de;
 245
 246                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
 247                                 return -ENOMEM;
 248
 249                         d = opendir(path);
 250                         free(path);
 251
 252                         if (!d) {
 253                                 if (errno != ENOENT)
 254                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
 255
 256                                 continue;
 257                         }
 258
 259                         while ((de = readdir(d))) {
 260                                 int a, b;
 261
 262                                 if (ignore_file(de->d_name))
 263                                         continue;
 264
 265                                 if (de->d_name[0] != 'S')
 266                                         continue;
 267
 268                                 if (strlen(de->d_name) < 4)
 269                                         continue;
 270
 271                                 if (!streq(de->d_name + 3, init_script))
 272                                         continue;
 273
 274                                 /* Yay, we found it! Now decode the priority */
 275
 276                                 a = undecchar(de->d_name[1]);
 277                                 b = undecchar(de->d_name[2]);
 278
 279                                 if (a < 0 || b < 0)
 280                                         continue;
 281
 282                                 s->sysv_start_priority = a*10 + b;
 283
 284                                 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
 285
 286                                 closedir(d);
 287                                 return 0;
 288                         }
 289
 290                         closedir(d);
 291                 }
 292
 293         return 0;
 294 }
 295
 296 static int service_load_sysv_path(Service *s, const char *path) {
 297         FILE *f;
 298         Unit *u;
 299         unsigned line = 0;
 300         int r;
 301         enum {
 302                 NORMAL,
 303                 DESCRIPTION,
 304                 LSB,
 305                 LSB_DESCRIPTION
 306         } state = NORMAL;
 307
 308         assert(s);
 309         assert(path);
 310
 311         u = UNIT(s);
 312
 313         if (!(f = fopen(path, "re"))) {
 314                 r = errno == ENOENT ? 0 : -errno;
 315                 goto finish;
 316         }
 317
 318         s->type = SERVICE_FORKING;
 319         s->restart = SERVICE_ONCE;
 320
 321         free(s->sysv_path);
 322         if (!(s->sysv_path = strdup(path))) {
 323                 r = -ENOMEM;
 324                 goto finish;
 325         }
 326
 327         while (!feof(f)) {
 328                 char l[LINE_MAX], *t;
 329
 330                 if (!fgets(l, sizeof(l), f)) {
 331                         if (feof(f))
 332                                 break;
 333
 334                         r = -errno;
 335                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 336                         goto finish;
 337                 }
 338
 339                 line++;
 340
 341                 t = strstrip(l);
 342                 if (*t != '#')
 343                         continue;
 344
 345                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 346                         state = LSB;
 347                         s->sysv_has_lsb = true;
 348                         continue;
 349                 }
 350
 351                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 352                         state = NORMAL;
 353                         continue;
 354                 }
 355
 356                 t++;
 357                 t += strspn(t, WHITESPACE);
 358
 359                 if (state == NORMAL) {
 360
 361                         /* Try to parse Red Hat style chkconfig headers */
 362
 363                         if (startswith(t, "chkconfig:")) {
 364                                 int start_priority;
 365                                 char runlevels[16], *k;
 366
 367                                 state = NORMAL;
 368
 369                                 if (sscanf(t+10, "%15s %i %*i",
 370                                            runlevels,
 371                                            &start_priority) != 2) {
 372
 373                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 374                                         continue;
 375                                 }
 376
 377                                 if (start_priority < 0 || start_priority > 99)
 378                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 379                                 else
 380                                         s->sysv_start_priority = start_priority;
 381
 382                                 char_array_0(runlevels);
 383                                 k = delete_chars(runlevels, WHITESPACE "-");
 384
 385                                 if (k[0]) {
 386                                         char *d;
 387
 388                                         if (!(d = strdup(k))) {
 389                                                 r = -ENOMEM;
 390                                                 goto finish;
 391                                         }
 392
 393                                         free(s->sysv_runlevels);
 394                                         s->sysv_runlevels = d;
 395                                 }
 396
 397
 398                         } else if (startswith(t, "description:")) {
 399
 400                                 size_t k = strlen(t);
 401                                 char *d;
 402
 403                                 if (t[k-1] == '\\') {
 404                                         state = DESCRIPTION;
 405                                         t[k-1] = 0;
 406                                 }
 407
 408                                 if (!(d = strdup(strstrip(t+12)))) {
 409                                         r = -ENOMEM;
 410                                         goto finish;
 411                                 }
 412
 413                                 free(u->meta.description);
 414                                 u->meta.description = d;
 415
 416                         } else if (startswith(t, "pidfile:")) {
 417
 418                                 char *fn;
 419
 420                                 state = NORMAL;
 421
 422                                 fn = strstrip(t+8);
 423                                 if (!path_is_absolute(fn)) {
 424                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 425                                         continue;
 426                                 }
 427
 428                                 if (!(fn = strdup(fn))) {
 429                                         r = -ENOMEM;
 430                                         goto finish;
 431                                 }
 432
 433                                 free(s->pid_file);
 434                                 s->pid_file = fn;
 435                         }
 436
 437                 } else if (state == DESCRIPTION) {
 438
 439                         /* Try to parse Red Hat style description
 440                          * continuation */
 441
 442                         size_t k = strlen(t);
 443                         char *d;
 444
 445                         if (t[k-1] == '\\')
 446                                 t[k-1] = 0;
 447                         else
 448                                 state = NORMAL;
 449
 450                         assert(u->meta.description);
 451                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 452                                 r = -ENOMEM;
 453                                 goto finish;
 454                         }
 455
 456                         free(u->meta.description);
 457                         u->meta.description = d;
 458
 459                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 460
 461                         if (startswith(t, "Provides:")) {
 462                                 char *i, *w;
 463                                 size_t z;
 464
 465                                 state = LSB;
 466
 467                                 FOREACH_WORD(w, z, t+9, i) {
 468                                         char *n, *m;
 469
 470                                         if (!(n = strndup(w, z))) {
 471                                                 r = -ENOMEM;
 472                                                 goto finish;
 473                                         }
 474
 475                                         r = sysv_translate_name(n, &m);
 476                                         free(n);
 477
 478                                         if (r < 0)
 479                                                 goto finish;
 480
 481                                         if (r == 0)
 482                                                 continue;
 483
 484                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 485                                                 r = unit_add_name(u, m);
 486                                         else {
 487                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
 488                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
 489                                         }
 490
 491                                         free(m);
 492
 493                                         if (r < 0)
 494                                                 goto finish;
 495                                 }
 496
 497                         } else if (startswith(t, "Required-Start:") ||
 498                                    startswith(t, "Should-Start:")) {
 499                                 char *i, *w;
 500                                 size_t z;
 501
 502                                 state = LSB;
 503
 504                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 505                                         char *n, *m;
 506
 507                                         if (!(n = strndup(w, z))) {
 508                                                 r = -ENOMEM;
 509                                                 goto finish;
 510                                         }
 511
 512                                         r = sysv_translate_name(n, &m);
 513                                         free(n);
 514
 515                                         if (r < 0)
 516                                                 goto finish;
 517
 518                                         if (r == 0)
 519                                                 continue;
 520
 521                                         r = unit_add_dependency_by_name(u, UNIT_AFTER, m);
 522                                         free(m);
 523
 524                                         if (r < 0)
 525                                                 goto finish;
 526                                 }
 527                         } else if (startswith(t, "Default-Start:")) {
 528                                 char *k, *d;
 529
 530                                 state = LSB;
 531
 532                                 k = delete_chars(t+14, WHITESPACE "-");
 533
 534                                 if (k[0] != 0) {
 535                                         if (!(d = strdup(k))) {
 536                                                 r = -ENOMEM;
 537                                                 goto finish;
 538                                         }
 539
 540                                         free(s->sysv_runlevels);
 541                                         s->sysv_runlevels = d;
 542                                 }
 543
 544                         } else if (startswith(t, "Description:")) {
 545                                 char *d;
 546
 547                                 state = LSB_DESCRIPTION;
 548
 549                                 if (!(d = strdup(strstrip(t+12)))) {
 550                                         r = -ENOMEM;
 551                                         goto finish;
 552                                 }
 553
 554                                 free(u->meta.description);
 555                                 u->meta.description = d;
 556
 557                         } else if (startswith(t, "Short-Description:") &&
 558                                    !u->meta.description) {
 559                                 char *d;
 560
 561                                 /* We use the short description only
 562                                  * if no long description is set. */
 563
 564                                 state = LSB;
 565
 566                                 if (!(d = strdup(strstrip(t+18)))) {
 567                                         r = -ENOMEM;
 568                                         goto finish;
 569                                 }
 570
 571                                 u->meta.description = d;
 572
 573                         } else if (state == LSB_DESCRIPTION) {
 574
 575                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 576                                         char *d;
 577
 578                                         assert(u->meta.description);
 579                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 580                                                 r = -ENOMEM;
 581                                                 goto finish;
 582                                         }
 583
 584                                         free(u->meta.description);
 585                                         u->meta.description = d;
 586                                 } else
 587                                         state = LSB;
 588                         }
 589                 }
 590         }
 591
 592         /* If init scripts have no LSB header, then we enforce the
 593          * ordering via the chkconfig priorities. We try to determine
 594          * a priority for *all* init scripts here, since they are
 595          * needed as soon as at least one non-LSB script is used. */
 596
 597         if (s->sysv_start_priority < 0) {
 598                 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
 599
 600                 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
 601                         goto finish;
 602
 603                 if (s->sysv_start_priority < 0)
 604                         log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
 605         }
 606
 607         if ((r = sysv_exec_commands(s)) < 0)
 608                 goto finish;
 609
 610         if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
 611                 /* If there a runlevels configured for this service
 612                  * but none of the standard ones, then we assume this
 613                  * is some special kind of service (which might be
 614                  * needed for early boot) and don't create any links
 615                  * to it. */
 616
 617                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
 618                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
 619                         goto finish;
 620         }
 621
 622         u->meta.load_state = UNIT_LOADED;
 623         r = 0;
 624
 625 finish:
 626
 627         if (f)
 628                 fclose(f);
 629
 630         return r;
 631 }
 632
 633 static int service_load_sysv_name(Service *s, const char *name) {
 634         char **p;
 635
 636         assert(s);
 637         assert(name);
 638
 639         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 640                 char *path;
 641                 int r;
 642
 643                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 644                         return -ENOMEM;
 645
 646                 assert(endswith(path, ".service"));
 647                 path[strlen(path)-8] = 0;
 648
 649                 r = service_load_sysv_path(s, path);
 650                 free(path);
 651
 652                 if (r < 0)
 653                         return r;
 654
 655                 if ((UNIT(s)->meta.load_state != UNIT_STUB))
 656                         break;
 657         }
 658
 659         return 0;
 660 }
 661
 662 static int service_load_sysv(Service *s) {
 663         const char *t;
 664         Iterator i;
 665         int r;
 666
 667         assert(s);
 668
 669         /* Load service data from SysV init scripts, preferably with
 670          * LSB headers ... */
 671
 672         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 673                 return 0;
 674
 675         if ((t = unit_id(UNIT(s))))
 676                 if ((r = service_load_sysv_name(s, t)) < 0)
 677                         return r;
 678
 679         if (UNIT(s)->meta.load_state == UNIT_STUB)
 680                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 681                         if (t == unit_id(UNIT(s)))
 682                                 continue;
 683
 684                         if ((r == service_load_sysv_name(s, t)) < 0)
 685                                 return r;
 686
 687                         if (UNIT(s)->meta.load_state != UNIT_STUB)
 688                                 break;
 689                 }
 690
 691         return 0;
 692 }
 693
 694 static void service_init(Unit *u) {
 695         Service *s = SERVICE(u);
 696
 697         assert(u);
 698         assert(u->meta.load_state == UNIT_STUB);
 699
 700         s->type = 0;
 701         s->restart = 0;
 702
 703         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 704         s->restart_usec = DEFAULT_RESTART_USEC;
 705
 706         exec_context_init(&s->exec_context);
 707
 708         s->timer_watch.type = WATCH_INVALID;
 709
 710         s->state = SERVICE_DEAD;
 711
 712         s->sysv_start_priority = -1;
 713         s->permissions_start_only = false;
 714         s->root_directory_start_only = false;
 715         s->valid_no_process = false;
 716         s->kill_mode = 0;
 717         s->sysv_has_lsb = false;
 718         s->main_pid = s->control_pid = 0;
 719         s->main_pid_known = false;
 720         s->failure = false;
 721
 722         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 723 }
 724
 725 static int service_load(Unit *u) {
 726         int r;
 727         Service *s = SERVICE(u);
 728
 729         assert(s);
 730
 731         /* Load a .service file */
 732         if ((r = unit_load_fragment(u)) < 0)
 733                 return r;
 734
 735         /* Load a classic init script as a fallback, if we couldn't find anything */
 736         if (u->meta.load_state == UNIT_STUB)
 737                 if ((r = service_load_sysv(s)) < 0)
 738                         return r;
 739
 740         /* Still nothing found? Then let's give up */
 741         if (u->meta.load_state == UNIT_STUB)
 742                 return -ENOENT;
 743
 744         /* We were able to load something, then let's add in the
 745          * dropin directories. */
 746         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 747                 return r;
 748
 749         /* This is a new unit? Then let's add in some extras */
 750         if (u->meta.load_state == UNIT_LOADED) {
 751                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 752                         return r;
 753
 754                 if ((r = unit_add_default_cgroup(u)) < 0)
 755                         return r;
 756
 757                 if ((r = sysv_chkconfig_order(s)) < 0)
 758                         return r;
 759         }
 760
 761         return 0;
 762 }
 763
 764 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 765
 766         ServiceExecCommand c;
 767         Service *s = SERVICE(u);
 768         const char *prefix2;
 769         char *p2;
 770
 771         assert(s);
 772
 773         p2 = strappend(prefix, "\t");
 774         prefix2 = p2 ? p2 : prefix;
 775
 776         fprintf(f,
 777                 "%sService State: %s\n"
 778                 "%sPermissionsStartOnly: %s\n"
 779                 "%sRootDirectoryStartOnly: %s\n"
 780                 "%sValidNoProcess: %s\n"
 781                 "%sKillMode: %s\n"
 782                 "%sType: %s\n",
 783                 prefix, service_state_to_string(s->state),
 784                 prefix, yes_no(s->permissions_start_only),
 785                 prefix, yes_no(s->root_directory_start_only),
 786                 prefix, yes_no(s->valid_no_process),
 787                 prefix, kill_mode_to_string(s->kill_mode),
 788                 prefix, service_type_to_string(s->type));
 789
 790         if (s->control_pid > 0)
 791                 fprintf(f,
 792                         "%sControl PID: %llu\n",
 793                         prefix, (unsigned long long) s->control_pid);
 794
 795         if (s->main_pid > 0)
 796                 fprintf(f,
 797                         "%sMain PID: %llu\n",
 798                         prefix, (unsigned long long) s->main_pid);
 799
 800         if (s->pid_file)
 801                 fprintf(f,
 802                         "%sPIDFile: %s\n",
 803                         prefix, s->pid_file);
 804
 805         exec_context_dump(&s->exec_context, f, prefix);
 806
 807         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 808
 809                 if (!s->exec_command[c])
 810                         continue;
 811
 812                 fprintf(f, "%s→ %s:\n",
 813                         prefix, service_exec_command_to_string(c));
 814
 815                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 816         }
 817
 818         if (s->sysv_path)
 819                 fprintf(f,
 820                         "%sSysV Init Script Path: %s\n"
 821                         "%sSysV Init Script has LSB Header: %s\n",
 822                         prefix, s->sysv_path,
 823                         prefix, yes_no(s->sysv_has_lsb));
 824
 825         if (s->sysv_start_priority >= 0)
 826                 fprintf(f,
 827                         "%sSysVStartPriority: %i\n",
 828                         prefix, s->sysv_start_priority);
 829
 830         if (s->sysv_runlevels)
 831                 fprintf(f, "%sSysVRunLevels: %s\n",
 832                         prefix, s->sysv_runlevels);
 833
 834         free(p2);
 835 }
 836
 837 static int service_load_pid_file(Service *s) {
 838         char *k;
 839         unsigned long p;
 840         int r;
 841
 842         assert(s);
 843
 844         if (s->main_pid_known)
 845                 return 0;
 846
 847         assert(s->main_pid <= 0);
 848
 849         if (!s->pid_file)
 850                 return -ENOENT;
 851
 852         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 853                 return r;
 854
 855         if ((r = safe_atolu(k, &p)) < 0) {
 856                 free(k);
 857                 return r;
 858         }
 859
 860         if ((unsigned long) (pid_t) p != p)
 861                 return -ERANGE;
 862
 863         if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
 864                 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
 865                             (unsigned long long) p, s->pid_file);
 866                 return -ESRCH;
 867         }
 868
 869         if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
 870                 /* FIXME: we need to do something here */
 871                 return r;
 872
 873         s->main_pid = (pid_t) p;
 874         s->main_pid_known = true;
 875
 876         return 0;
 877 }
 878
 879 static int service_get_sockets(Service *s, Set **_set) {
 880         Set *set;
 881         Iterator i;
 882         char *t;
 883         int r;
 884
 885         assert(s);
 886         assert(_set);
 887
 888         /* Collects all Socket objects that belong to this
 889          * service. Note that a service might have multiple sockets
 890          * via multiple names. */
 891
 892         if (!(set = set_new(NULL, NULL)))
 893                 return -ENOMEM;
 894
 895         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 896                 char *k;
 897                 Unit *p;
 898
 899                 /* Look for all socket objects that go by any of our
 900                  * units and collect their fds */
 901
 902                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 903                         r = -ENOMEM;
 904                         goto fail;
 905                 }
 906
 907                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 908                 free(k);
 909
 910                 if (!p) continue;
 911
 912                 if ((r = set_put(set, p)) < 0)
 913                         goto fail;
 914         }
 915
 916         *_set = set;
 917         return 0;
 918
 919 fail:
 920         set_free(set);
 921         return r;
 922 }
 923
 924
 925 static int service_notify_sockets_dead(Service *s) {
 926         Iterator i;
 927         Set *set;
 928         Socket *sock;
 929         int r;
 930
 931         assert(s);
 932
 933         /* Notifies all our sockets when we die */
 934
 935         if ((r = service_get_sockets(s, &set)) < 0)
 936                 return r;
 937
 938         SET_FOREACH(sock, set, i)
 939                 socket_notify_service_dead(sock);
 940
 941         set_free(set);
 942
 943         return 0;
 944 }
 945
 946 static void service_set_state(Service *s, ServiceState state) {
 947         ServiceState old_state;
 948         assert(s);
 949
 950         old_state = s->state;
 951         s->state = state;
 952
 953         if (state != SERVICE_START_PRE &&
 954             state != SERVICE_START &&
 955             state != SERVICE_START_POST &&
 956             state != SERVICE_RELOAD &&
 957             state != SERVICE_STOP &&
 958             state != SERVICE_STOP_SIGTERM &&
 959             state != SERVICE_STOP_SIGKILL &&
 960             state != SERVICE_STOP_POST &&
 961             state != SERVICE_FINAL_SIGTERM &&
 962             state != SERVICE_FINAL_SIGKILL &&
 963             state != SERVICE_AUTO_RESTART)
 964                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 965
 966         if (state != SERVICE_START &&
 967             state != SERVICE_START_POST &&
 968             state != SERVICE_RUNNING &&
 969             state != SERVICE_RELOAD &&
 970             state != SERVICE_STOP &&
 971             state != SERVICE_STOP_SIGTERM &&
 972             state != SERVICE_STOP_SIGKILL)
 973                 service_unwatch_main_pid(s);
 974
 975         if (state != SERVICE_START_PRE &&
 976             state != SERVICE_START &&
 977             state != SERVICE_START_POST &&
 978             state != SERVICE_RELOAD &&
 979             state != SERVICE_STOP &&
 980             state != SERVICE_STOP_SIGTERM &&
 981             state != SERVICE_STOP_SIGKILL &&
 982             state != SERVICE_STOP_POST &&
 983             state != SERVICE_FINAL_SIGTERM &&
 984             state != SERVICE_FINAL_SIGKILL) {
 985                 service_unwatch_control_pid(s);
 986                 s->control_command = NULL;
 987         }
 988
 989         if (state == SERVICE_DEAD ||
 990             state == SERVICE_STOP ||
 991             state == SERVICE_STOP_SIGTERM ||
 992             state == SERVICE_STOP_SIGKILL ||
 993             state == SERVICE_STOP_POST ||
 994             state == SERVICE_FINAL_SIGTERM ||
 995             state == SERVICE_FINAL_SIGKILL ||
 996             state == SERVICE_MAINTAINANCE ||
 997             state == SERVICE_AUTO_RESTART)
 998                 service_notify_sockets_dead(s);
 999
1000         if (old_state != state)
1001                 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
1002
1003         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1004 }
1005
1006 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1007         Iterator i;
1008         int r;
1009         int *rfds = NULL;
1010         unsigned rn_fds = 0;
1011         Set *set;
1012         Socket *sock;
1013
1014         assert(s);
1015         assert(fds);
1016         assert(n_fds);
1017
1018         if ((r = service_get_sockets(s, &set)) < 0)
1019                 return r;
1020
1021         SET_FOREACH(sock, set, i) {
1022                 int *cfds;
1023                 unsigned cn_fds;
1024
1025                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1026                         goto fail;
1027
1028                 if (!cfds)
1029                         continue;
1030
1031                 if (!rfds) {
1032                         rfds = cfds;
1033                         rn_fds = cn_fds;
1034                 } else {
1035                         int *t;
1036
1037                         if (!(t = new(int, rn_fds+cn_fds))) {
1038                                 free(cfds);
1039                                 r = -ENOMEM;
1040                                 goto fail;
1041                         }
1042
1043                         memcpy(t, rfds, rn_fds);
1044                         memcpy(t+rn_fds, cfds, cn_fds);
1045                         free(rfds);
1046                         free(cfds);
1047
1048                         rfds = t;
1049                         rn_fds = rn_fds+cn_fds;
1050                 }
1051         }
1052
1053         *fds = rfds;
1054         *n_fds = rn_fds;
1055
1056         set_free(set);
1057
1058         return 0;
1059
1060 fail:
1061         set_free(set);
1062         free(rfds);
1063
1064         return r;
1065 }
1066
1067 static int service_spawn(
1068                 Service *s,
1069                 ExecCommand *c,
1070                 bool timeout,
1071                 bool pass_fds,
1072                 bool apply_permissions,
1073                 bool apply_chroot,
1074                 pid_t *_pid) {
1075
1076         pid_t pid;
1077         int r;
1078         int *fds = NULL;
1079         unsigned n_fds = 0;
1080
1081         assert(s);
1082         assert(c);
1083         assert(_pid);
1084
1085         if (pass_fds)
1086                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1087                         goto fail;
1088
1089         if (timeout) {
1090                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1091                         goto fail;
1092         } else
1093                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1094
1095         if ((r = exec_spawn(c,
1096                             &s->exec_context,
1097                             fds, n_fds,
1098                             apply_permissions,
1099                             apply_chroot,
1100                             UNIT(s)->meta.cgroup_bondings,
1101                             &pid)) < 0)
1102                 goto fail;
1103
1104         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1105                 /* FIXME: we need to do something here */
1106                 goto fail;
1107
1108         free(fds);
1109         *_pid = pid;
1110
1111         return 0;
1112
1113 fail:
1114         free(fds);
1115
1116         if (timeout)
1117                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1118
1119         return r;
1120 }
1121
1122 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1123         int r;
1124         assert(s);
1125
1126         if (!success)
1127                 s->failure = true;
1128
1129         if (allow_restart &&
1130             (s->restart == SERVICE_RESTART_ALWAYS ||
1131              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1132
1133                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1134                         goto fail;
1135
1136                 service_set_state(s, SERVICE_AUTO_RESTART);
1137         } else
1138                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1139
1140         return;
1141
1142 fail:
1143         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1144         service_enter_dead(s, false, false);
1145 }
1146
1147 static void service_enter_signal(Service *s, ServiceState state, bool success);
1148
1149 static void service_enter_stop_post(Service *s, bool success) {
1150         int r;
1151         assert(s);
1152
1153         if (!success)
1154                 s->failure = true;
1155
1156         service_unwatch_control_pid(s);
1157
1158         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1159                 if ((r = service_spawn(s,
1160                                        s->control_command,
1161                                        true,
1162                                        false,
1163                                        !s->permissions_start_only,
1164                                        !s->root_directory_start_only,
1165                                        &s->control_pid)) < 0)
1166                         goto fail;
1167
1168
1169         service_set_state(s, SERVICE_STOP_POST);
1170
1171         if (!s->control_command)
1172                 service_enter_dead(s, true, true);
1173
1174         return;
1175
1176 fail:
1177         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1178         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1179 }
1180
1181 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1182         int r;
1183         bool sent = false;
1184
1185         assert(s);
1186
1187         if (!success)
1188                 s->failure = true;
1189
1190         if (s->main_pid > 0 || s->control_pid > 0) {
1191                 int sig;
1192
1193                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1194
1195                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1196
1197                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1198                                 if (r != -EAGAIN && r != -ESRCH)
1199                                         goto fail;
1200                         } else
1201                                 sent = true;
1202                 }
1203
1204                 if (!sent) {
1205                         r = 0;
1206                         if (s->main_pid > 0) {
1207                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1208                                         r = -errno;
1209                                 else
1210                                         sent = true;
1211                         }
1212
1213                         if (s->control_pid > 0) {
1214                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1215                                         r = -errno;
1216                                 else
1217                                         sent = true;
1218                         }
1219
1220                         if (r < 0)
1221                                 goto fail;
1222                 }
1223         }
1224
1225         service_set_state(s, state);
1226
1227         if (s->main_pid <= 0 && s->control_pid <= 0)
1228                 service_enter_dead(s, true, true);
1229
1230         return;
1231
1232 fail:
1233         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1234
1235         if (sent)  {
1236                 s->failure = true;
1237                 service_set_state(s, state);
1238         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1239                 service_enter_stop_post(s, false);
1240         else
1241                 service_enter_dead(s, false, true);
1242 }
1243
1244 static void service_enter_stop(Service *s, bool success) {
1245         int r;
1246         assert(s);
1247
1248         if (!success)
1249                 s->failure = true;
1250
1251         service_unwatch_control_pid(s);
1252
1253         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1254                 if ((r = service_spawn(s,
1255                                        s->control_command,
1256                                        true,
1257                                        false,
1258                                        !s->permissions_start_only,
1259                                        !s->root_directory_start_only,
1260                                        &s->control_pid)) < 0)
1261                         goto fail;
1262
1263         service_set_state(s, SERVICE_STOP);
1264
1265         if (!s->control_command)
1266                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1267
1268         return;
1269
1270 fail:
1271         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1272         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1273 }
1274
1275 static void service_enter_start_post(Service *s) {
1276         int r;
1277         assert(s);
1278
1279         service_unwatch_control_pid(s);
1280
1281         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1282                 if ((r = service_spawn(s,
1283                                        s->control_command,
1284                                        true,
1285                                        false,
1286                                        !s->permissions_start_only,
1287                                        !s->root_directory_start_only,
1288                                        &s->control_pid)) < 0)
1289                         goto fail;
1290
1291
1292         service_set_state(s, SERVICE_START_POST);
1293
1294         if (!s->control_command)
1295                 service_set_state(s, SERVICE_RUNNING);
1296
1297         return;
1298
1299 fail:
1300         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1301         service_enter_stop(s, false);
1302 }
1303
1304 static void service_enter_start(Service *s) {
1305         pid_t pid;
1306         int r;
1307
1308         assert(s);
1309
1310         assert(s->exec_command[SERVICE_EXEC_START]);
1311         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1312
1313         if ((r = service_spawn(s,
1314                                s->exec_command[SERVICE_EXEC_START],
1315                                s->type == SERVICE_FORKING,
1316                                true,
1317                                true,
1318                                true,
1319                                &pid)) < 0)
1320                 goto fail;
1321
1322         service_set_state(s, SERVICE_START);
1323
1324         if (s->type == SERVICE_SIMPLE) {
1325                 /* For simple services we immediately start
1326                  * the START_POST binaries. */
1327
1328                 service_unwatch_main_pid(s);
1329
1330                 s->main_pid = pid;
1331                 s->main_pid_known = true;
1332                 service_enter_start_post(s);
1333
1334         } else  if (s->type == SERVICE_FORKING) {
1335
1336                 /* For forking services we wait until the start
1337                  * process exited. */
1338
1339                 service_unwatch_control_pid(s);
1340
1341                 s->control_pid = pid;
1342                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1343         } else if (s->type == SERVICE_FINISH) {
1344
1345                 /* For finishing services we wait until the start
1346                  * process exited, too, but it is our main process. */
1347
1348                 service_unwatch_main_pid(s);
1349
1350                 s->main_pid = pid;
1351                 s->main_pid_known = true;
1352                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1353         } else
1354                 assert_not_reached("Unknown service type");
1355
1356         return;
1357
1358 fail:
1359         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1360         service_enter_stop(s, false);
1361 }
1362
1363 static void service_enter_start_pre(Service *s) {
1364         int r;
1365
1366         assert(s);
1367
1368         service_unwatch_control_pid(s);
1369
1370         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1371                 if ((r = service_spawn(s,
1372                                        s->control_command,
1373                                        true,
1374                                        false,
1375                                        !s->permissions_start_only,
1376                                        !s->root_directory_start_only,
1377                                        &s->control_pid)) < 0)
1378                         goto fail;
1379
1380         service_set_state(s, SERVICE_START_PRE);
1381
1382         if (!s->control_command)
1383                 service_enter_start(s);
1384
1385         return;
1386
1387 fail:
1388         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1389         service_enter_dead(s, false, true);
1390 }
1391
1392 static void service_enter_restart(Service *s) {
1393         int r;
1394         assert(s);
1395
1396         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1397                 goto fail;
1398
1399         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1400         service_enter_dead(s, true, false);
1401         return;
1402
1403 fail:
1404
1405         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1406         service_enter_dead(s, false, false);
1407 }
1408
1409 static void service_enter_reload(Service *s) {
1410         int r;
1411
1412         assert(s);
1413
1414         service_unwatch_control_pid(s);
1415
1416         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1417                 if ((r = service_spawn(s,
1418                                        s->control_command,
1419                                        true,
1420                                        false,
1421                                        !s->permissions_start_only,
1422                                        !s->root_directory_start_only,
1423                                        &s->control_pid)) < 0)
1424                         goto fail;
1425
1426         service_set_state(s, SERVICE_RELOAD);
1427
1428         if (!s->control_command)
1429                 service_set_state(s, SERVICE_RUNNING);
1430
1431         return;
1432
1433 fail:
1434         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1435         service_enter_stop(s, false);
1436 }
1437
1438 static void service_run_next(Service *s, bool success) {
1439         int r;
1440
1441         assert(s);
1442         assert(s->control_command);
1443         assert(s->control_command->command_next);
1444
1445         if (!success)
1446                 s->failure = true;
1447
1448         s->control_command = s->control_command->command_next;
1449
1450         service_unwatch_control_pid(s);
1451
1452         if ((r = service_spawn(s,
1453                                s->control_command,
1454                                true,
1455                                false,
1456                                !s->permissions_start_only,
1457                                !s->root_directory_start_only,
1458                                &s->control_pid)) < 0)
1459                 goto fail;
1460
1461         return;
1462
1463 fail:
1464         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1465
1466         if (s->state == SERVICE_STOP)
1467                 service_enter_stop_post(s, false);
1468         else if (s->state == SERVICE_STOP_POST)
1469                 service_enter_dead(s, false, true);
1470         else
1471                 service_enter_stop(s, false);
1472 }
1473
1474 static int service_start(Unit *u) {
1475         Service *s = SERVICE(u);
1476
1477         assert(s);
1478
1479         /* We cannot fulfill this request right now, try again later
1480          * please! */
1481         if (s->state == SERVICE_STOP ||
1482             s->state == SERVICE_STOP_SIGTERM ||
1483             s->state == SERVICE_STOP_SIGKILL ||
1484             s->state == SERVICE_STOP_POST ||
1485             s->state == SERVICE_FINAL_SIGTERM ||
1486             s->state == SERVICE_FINAL_SIGKILL)
1487                 return -EAGAIN;
1488
1489         /* Already on it! */
1490         if (s->state == SERVICE_START_PRE ||
1491             s->state == SERVICE_START ||
1492             s->state == SERVICE_START_POST)
1493                 return 0;
1494
1495         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1496
1497         /* Make sure we don't enter a busy loop of some kind. */
1498         if (!ratelimit_test(&s->ratelimit)) {
1499                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1500                 return -EAGAIN;
1501         }
1502
1503         s->failure = false;
1504         s->main_pid_known = false;
1505
1506         service_enter_start_pre(s);
1507         return 0;
1508 }
1509
1510 static int service_stop(Unit *u) {
1511         Service *s = SERVICE(u);
1512
1513         assert(s);
1514
1515         /* Cannot do this now */
1516         if (s->state == SERVICE_START_PRE ||
1517             s->state == SERVICE_START ||
1518             s->state == SERVICE_START_POST ||
1519             s->state == SERVICE_RELOAD)
1520                 return -EAGAIN;
1521
1522         /* Already on it */
1523         if (s->state == SERVICE_STOP ||
1524             s->state == SERVICE_STOP_SIGTERM ||
1525             s->state == SERVICE_STOP_SIGKILL ||
1526             s->state == SERVICE_STOP_POST ||
1527             s->state == SERVICE_FINAL_SIGTERM ||
1528             s->state == SERVICE_FINAL_SIGKILL)
1529                 return 0;
1530
1531         if (s->state == SERVICE_AUTO_RESTART) {
1532                 service_set_state(s, SERVICE_DEAD);
1533                 return 0;
1534         }
1535
1536         assert(s->state == SERVICE_RUNNING);
1537
1538         service_enter_stop(s, true);
1539         return 0;
1540 }
1541
1542 static int service_reload(Unit *u) {
1543         Service *s = SERVICE(u);
1544
1545         assert(s);
1546
1547         assert(s->state == SERVICE_RUNNING);
1548
1549         service_enter_reload(s);
1550         return 0;
1551 }
1552
1553 static bool service_can_reload(Unit *u) {
1554         Service *s = SERVICE(u);
1555
1556         assert(s);
1557
1558         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1559 }
1560
1561 static UnitActiveState service_active_state(Unit *u) {
1562         assert(u);
1563
1564         return state_translation_table[SERVICE(u)->state];
1565 }
1566
1567 static int main_pid_good(Service *s) {
1568         assert(s);
1569
1570         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1571          * don't know */
1572
1573         /* If we know the pid file, then lets just check if it is
1574          * still valid */
1575         if (s->main_pid_known)
1576                 return s->main_pid > 0;
1577
1578         /* We don't know the pid */
1579         return -EAGAIN;
1580 }
1581
1582 static bool control_pid_good(Service *s) {
1583         assert(s);
1584
1585         return s->control_pid > 0;
1586 }
1587
1588 static int cgroup_good(Service *s) {
1589         assert(s);
1590
1591         if (s->valid_no_process)
1592                 return -EAGAIN;
1593
1594         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1595 }
1596
1597 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1598         Service *s = SERVICE(u);
1599         bool success;
1600
1601         assert(s);
1602         assert(pid >= 0);
1603
1604         success = code == CLD_EXITED && status == 0;
1605         s->failure = s->failure || !success;
1606
1607         if (s->main_pid == pid) {
1608
1609                 exec_status_fill(&s->main_exec_status, pid, code, status);
1610                 s->main_pid = 0;
1611
1612                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1613                         assert(s->exec_command[SERVICE_EXEC_START]);
1614                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1615                 }
1616
1617                 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
1618
1619                 /* The service exited, so the service is officially
1620                  * gone. */
1621
1622                 switch (s->state) {
1623
1624                 case SERVICE_START_POST:
1625                 case SERVICE_RELOAD:
1626                 case SERVICE_STOP:
1627                         /* Need to wait until the operation is
1628                          * done */
1629                         break;
1630
1631                 case SERVICE_START:
1632                         assert(s->type == SERVICE_FINISH);
1633
1634                         /* This was our main goal, so let's go on */
1635                         if (success)
1636                                 service_enter_start_post(s);
1637                         else
1638                                 service_enter_stop(s, false);
1639                         break;
1640
1641                 case SERVICE_RUNNING:
1642                         service_enter_stop(s, success);
1643                         break;
1644
1645                 case SERVICE_STOP_SIGTERM:
1646                 case SERVICE_STOP_SIGKILL:
1647
1648                         if (!control_pid_good(s))
1649                                 service_enter_stop_post(s, success);
1650
1651                         /* If there is still a control process, wait for that first */
1652                         break;
1653
1654                 default:
1655                         assert_not_reached("Uh, main process died at wrong time.");
1656                 }
1657
1658         } else if (s->control_pid == pid) {
1659                 assert(s->control_command);
1660
1661                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1662                 s->control_pid = 0;
1663
1664                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1665
1666                 /* If we are shutting things down anyway we
1667                  * don't care about failing commands. */
1668
1669                 if (s->control_command->command_next &&
1670                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1671
1672                         /* There is another command to *
1673                          * execute, so let's do that. */
1674
1675                         service_run_next(s, success);
1676
1677                 else {
1678                         /* No further commands for this step, so let's
1679                          * figure out what to do next */
1680
1681                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1682
1683                         switch (s->state) {
1684
1685                         case SERVICE_START_PRE:
1686                                 if (success)
1687                                         service_enter_start(s);
1688                                 else
1689                                         service_enter_stop(s, false);
1690                                 break;
1691
1692                         case SERVICE_START:
1693                                 assert(s->type == SERVICE_FORKING);
1694
1695                                 /* Let's try to load the pid
1696                                  * file here if we can. We
1697                                  * ignore the return value,
1698                                  * since the PID file might
1699                                  * actually be created by a
1700                                  * START_POST script */
1701
1702                                 if (success) {
1703                                         if (s->pid_file)
1704                                                 service_load_pid_file(s);
1705
1706                                         service_enter_start_post(s);
1707                                 } else
1708                                         service_enter_stop(s, false);
1709
1710                                 break;
1711
1712                         case SERVICE_START_POST:
1713                                 if (success && s->pid_file && !s->main_pid_known) {
1714                                         int r;
1715
1716                                         /* Hmm, let's see if we can
1717                                          * load the pid now after the
1718                                          * start-post scripts got
1719                                          * executed. */
1720
1721                                         if ((r = service_load_pid_file(s)) < 0)
1722                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1723                                 }
1724
1725                                 /* Fall through */
1726
1727                         case SERVICE_RELOAD:
1728                                 if (success) {
1729                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1730                                                 service_set_state(s, SERVICE_RUNNING);
1731                                         else
1732                                                 service_enter_stop(s, true);
1733                                 } else
1734                                         service_enter_stop(s, false);
1735
1736                                 break;
1737
1738                         case SERVICE_STOP:
1739                                 if (main_pid_good(s) > 0)
1740                                         /* Still not dead and we know the PID? Let's go hunting. */
1741                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1742                                 else
1743                                         service_enter_stop_post(s, success);
1744                                 break;
1745
1746                         case SERVICE_STOP_SIGTERM:
1747                         case SERVICE_STOP_SIGKILL:
1748                                 if (main_pid_good(s) <= 0)
1749                                         service_enter_stop_post(s, success);
1750
1751                                 /* If there is still a service
1752                                  * process around, wait until
1753                                  * that one quit, too */
1754                                 break;
1755
1756                         case SERVICE_STOP_POST:
1757                         case SERVICE_FINAL_SIGTERM:
1758                         case SERVICE_FINAL_SIGKILL:
1759                                 service_enter_dead(s, success, true);
1760                                 break;
1761
1762                         default:
1763                                 assert_not_reached("Uh, control process died at wrong time.");
1764                         }
1765                 }
1766         } else
1767                 assert_not_reached("Got SIGCHLD for unkown PID");
1768 }
1769
1770 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1771         Service *s = SERVICE(u);
1772
1773         assert(s);
1774         assert(elapsed == 1);
1775
1776         assert(w == &s->timer_watch);
1777
1778         switch (s->state) {
1779
1780         case SERVICE_START_PRE:
1781         case SERVICE_START:
1782         case SERVICE_START_POST:
1783         case SERVICE_RELOAD:
1784                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1785                 service_enter_stop(s, false);
1786                 break;
1787
1788         case SERVICE_STOP:
1789                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1790                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1791                 break;
1792
1793         case SERVICE_STOP_SIGTERM:
1794                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1795                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1796                 break;
1797
1798         case SERVICE_STOP_SIGKILL:
1799                 /* Uh, wie sent a SIGKILL and it is still not gone?
1800                  * Must be something we cannot kill, so let's just be
1801                  * weirded out and continue */
1802
1803                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1804                 service_enter_stop_post(s, false);
1805                 break;
1806
1807         case SERVICE_STOP_POST:
1808                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1809                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1810                 break;
1811
1812         case SERVICE_FINAL_SIGTERM:
1813                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1814                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1815                 break;
1816
1817         case SERVICE_FINAL_SIGKILL:
1818                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1819                 service_enter_dead(s, false, true);
1820                 break;
1821
1822         case SERVICE_AUTO_RESTART:
1823                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1824                 service_enter_restart(s);
1825                 break;
1826
1827         default:
1828                 assert_not_reached("Timeout at wrong time.");
1829         }
1830 }
1831
1832 static void service_cgroup_notify_event(Unit *u) {
1833         Service *s = SERVICE(u);
1834
1835         assert(u);
1836
1837         log_debug("%s: cgroup is empty", unit_id(u));
1838
1839         switch (s->state) {
1840
1841                 /* Waiting for SIGCHLD is usually more interesting,
1842                  * because it includes return codes/signals. Which is
1843                  * why we ignore the cgroup events for most cases,
1844                  * except when we don't know pid which to expect the
1845                  * SIGCHLD for. */
1846
1847         case SERVICE_RUNNING:
1848
1849                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1850                         service_enter_stop(s, true);
1851
1852                 break;
1853
1854         default:
1855                 ;
1856         }
1857 }
1858
1859 static int service_enumerate(Manager *m) {
1860         char **p;
1861         unsigned i;
1862         DIR *d = NULL;
1863         char *path = NULL, *fpath = NULL, *name = NULL;
1864         int r;
1865
1866         assert(m);
1867
1868         STRV_FOREACH(p, m->sysvrcnd_path)
1869                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1870                         struct dirent *de;
1871
1872                         free(path);
1873                         path = NULL;
1874                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1875                                 r = -ENOMEM;
1876                                 goto finish;
1877                         }
1878
1879                         if (d)
1880                                 closedir(d);
1881
1882                         if (!(d = opendir(path))) {
1883                                 if (errno != ENOENT)
1884                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1885
1886                                 continue;
1887                         }
1888
1889                         while ((de = readdir(d))) {
1890                                 Unit *runlevel, *service;
1891
1892                                 if (ignore_file(de->d_name))
1893                                         continue;
1894
1895                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1896                                         continue;
1897
1898                                 if (strlen(de->d_name) < 4)
1899                                         continue;
1900
1901                                 free(fpath);
1902                                 fpath = NULL;
1903                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1904                                         r = -ENOMEM;
1905                                         goto finish;
1906                                 }
1907
1908                                 if (access(fpath, X_OK) < 0) {
1909
1910                                         if (errno != ENOENT)
1911                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1912
1913                                         continue;
1914                                 }
1915
1916                                 free(name);
1917                                 name = NULL;
1918                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1919                                         r = -ENOMEM;
1920                                         goto finish;
1921                                 }
1922
1923                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1924                                         goto finish;
1925
1926                                 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1927                                         goto finish;
1928
1929                                 if (de->d_name[0] == 'S') {
1930                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1931                                                 goto finish;
1932
1933                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1934                                                 goto finish;
1935
1936                                 } else if (de->d_name[0] == 'K' &&
1937                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1938                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1939
1940                                         /* We honour K links only for
1941                                          * halt/reboot. For the normal
1942                                          * runlevels we assume the
1943                                          * stop jobs will be
1944                                          * implicitly added by the
1945                                          * core logic. */
1946
1947                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1948                                                 goto finish;
1949
1950                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1951                                                 goto finish;
1952                                 }
1953                         }
1954                 }
1955
1956         r = 0;
1957
1958 finish:
1959         free(path);
1960         free(fpath);
1961         free(name);
1962         closedir(d);
1963
1964         return r;
1965 }
1966
1967 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1968         [SERVICE_DEAD] = "dead",
1969         [SERVICE_START_PRE] = "start-pre",
1970         [SERVICE_START] = "start",
1971         [SERVICE_START_POST] = "start-post",
1972         [SERVICE_RUNNING] = "running",
1973         [SERVICE_RELOAD] = "reload",
1974         [SERVICE_STOP] = "stop",
1975         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1976         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1977         [SERVICE_STOP_POST] = "stop-post",
1978         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1979         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1980         [SERVICE_MAINTAINANCE] = "maintainance",
1981         [SERVICE_AUTO_RESTART] = "auto-restart",
1982 };
1983
1984 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1985
1986 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1987         [SERVICE_ONCE] = "once",
1988         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1989         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1990 };
1991
1992 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1993
1994 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1995         [SERVICE_FORKING] = "forking",
1996         [SERVICE_SIMPLE] = "simple",
1997         [SERVICE_FINISH] = "finish"
1998 };
1999
2000 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2001
2002 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2003         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2004         [SERVICE_EXEC_START] = "ExecStart",
2005         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2006         [SERVICE_EXEC_RELOAD] = "ExecReload",
2007         [SERVICE_EXEC_STOP] = "ExecStop",
2008         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2009 };
2010
2011 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2012
2013 const UnitVTable service_vtable = {
2014         .suffix = ".service",
2015
2016         .init = service_init,
2017         .load = service_load,
2018         .done = service_done,
2019
2020         .dump = service_dump,
2021
2022         .start = service_start,
2023         .stop = service_stop,
2024         .reload = service_reload,
2025
2026         .can_reload = service_can_reload,
2027
2028         .active_state = service_active_state,
2029
2030         .sigchld_event = service_sigchld_event,
2031         .timer_event = service_timer_event,
2032
2033         .cgroup_notify_empty = service_cgroup_notify_event,
2034
2035         .enumerate = service_enumerate
2036 };