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