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