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 #include "unit-name.h"
  34 #include "dbus-service.h"
  35
  36 #define COMMENTS "#;\n"
  37 #define NEWLINES "\n\r"
  38 #define LINE_MAX 4096
  39
  40 static const char * const rcnd_table[] = {
  41         "/rc0.d",  SPECIAL_RUNLEVEL0_TARGET,
  42         "/rc1.d",  SPECIAL_RUNLEVEL1_TARGET,
  43         "/rc2.d",  SPECIAL_RUNLEVEL2_TARGET,
  44         "/rc3.d",  SPECIAL_RUNLEVEL3_TARGET,
  45         "/rc4.d",  SPECIAL_RUNLEVEL4_TARGET,
  46         "/rc5.d",  SPECIAL_RUNLEVEL5_TARGET,
  47         "/rc6.d",  SPECIAL_RUNLEVEL6_TARGET,
  48         "/boot.d", SPECIAL_BASIC_TARGET
  49 };
  50
  51 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  52         [SERVICE_DEAD] = UNIT_INACTIVE,
  53         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  54         [SERVICE_START] = UNIT_ACTIVATING,
  55         [SERVICE_START_POST] = UNIT_ACTIVATING,
  56         [SERVICE_RUNNING] = UNIT_ACTIVE,
  57         [SERVICE_EXITED] = UNIT_ACTIVE,
  58         [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
  59         [SERVICE_STOP] = UNIT_DEACTIVATING,
  60         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  61         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  62         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  63         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  64         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  65         [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
  66         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
  67 };
  68
  69 static void service_init(Unit *u) {
  70         Service *s = SERVICE(u);
  71
  72         assert(u);
  73         assert(u->meta.load_state == UNIT_STUB);
  74
  75         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  76         s->restart_usec = DEFAULT_RESTART_USEC;
  77         s->timer_watch.type = WATCH_INVALID;
  78         s->sysv_start_priority = -1;
  79         s->socket_fd = -1;
  80
  81         exec_context_init(&s->exec_context);
  82
  83         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
  84
  85         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
  86 }
  87
  88 static void service_unwatch_control_pid(Service *s) {
  89         assert(s);
  90
  91         if (s->control_pid <= 0)
  92                 return;
  93
  94         unit_unwatch_pid(UNIT(s), s->control_pid);
  95         s->control_pid = 0;
  96 }
  97
  98 static void service_unwatch_main_pid(Service *s) {
  99         assert(s);
 100
 101         if (s->main_pid <= 0)
 102                 return;
 103
 104         unit_unwatch_pid(UNIT(s), s->main_pid);
 105         s->main_pid = 0;
 106 }
 107
 108 static void service_close_socket_fd(Service *s) {
 109         assert(s);
 110
 111         if (s->socket_fd < 0)
 112                 return;
 113
 114         close_nointr_nofail(s->socket_fd);
 115         s->socket_fd = -1;
 116 }
 117
 118 static void service_done(Unit *u) {
 119         Service *s = SERVICE(u);
 120
 121         assert(s);
 122
 123         free(s->pid_file);
 124         s->pid_file = NULL;
 125
 126         free(s->sysv_path);
 127         s->sysv_path = NULL;
 128
 129         free(s->sysv_runlevels);
 130         s->sysv_runlevels = NULL;
 131
 132         exec_context_done(&s->exec_context);
 133         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 134         s->control_command = NULL;
 135
 136         /* This will leak a process, but at least no memory or any of
 137          * our resources */
 138         service_unwatch_main_pid(s);
 139         service_unwatch_control_pid(s);
 140
 141         if (s->bus_name)  {
 142                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 143                 free(s->bus_name);
 144                 s->bus_name = NULL;
 145         }
 146
 147         service_close_socket_fd(s);
 148
 149         unit_unwatch_timer(u, &s->timer_watch);
 150 }
 151
 152 static int sysv_translate_name(const char *name, char **_r) {
 153
 154         static const char * const table[] = {
 155                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 156                 "$network",   SPECIAL_NETWORK_TARGET,
 157                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 158                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 159                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 160                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 161                 "$time",      SPECIAL_RTC_SET_TARGET
 162         };
 163
 164         unsigned i;
 165         char *r;
 166
 167         for (i = 0; i < ELEMENTSOF(table); i += 2)
 168                 if (streq(table[i], name)) {
 169                         if (!(r = strdup(table[i+1])))
 170                                 return -ENOMEM;
 171
 172                         goto finish;
 173                 }
 174
 175         if (*name == '$')
 176                 return 0;
 177
 178         if (asprintf(&r, "%s.service", name) < 0)
 179                 return -ENOMEM;
 180
 181 finish:
 182
 183         if (_r)
 184                 *_r = r;
 185
 186         return 1;
 187 }
 188
 189 static int sysv_chkconfig_order(Service *s) {
 190         Meta *other;
 191         int r;
 192
 193         assert(s);
 194
 195         if (s->sysv_start_priority < 0)
 196                 return 0;
 197
 198         /* For each pair of services where at least one lacks a LSB
 199          * header, we use the start priority value to order things. */
 200
 201         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 202                 Service *t;
 203                 UnitDependency d;
 204
 205                 t = (Service*) other;
 206
 207                 if (s == t)
 208                         continue;
 209
 210                 if (t->sysv_start_priority < 0)
 211                         continue;
 212
 213                 /* If both units have modern headers we don't care
 214                  * about the priorities */
 215                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 216                     (!t->sysv_path || t->sysv_has_lsb))
 217                         continue;
 218
 219                 if (t->sysv_start_priority < s->sysv_start_priority)
 220                         d = UNIT_AFTER;
 221                 else if (t->sysv_start_priority > s->sysv_start_priority)
 222                         d = UNIT_BEFORE;
 223                 else
 224                         continue;
 225
 226                 /* FIXME: Maybe we should compare the name here lexicographically? */
 227
 228                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 229                         return r;
 230         }
 231
 232         return 0;
 233 }
 234
 235 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 236         ExecCommand *c;
 237
 238         if (!(c = new0(ExecCommand, 1)))
 239                 return NULL;
 240
 241         if (!(c->path = strdup(path))) {
 242                 free(c);
 243                 return NULL;
 244         }
 245
 246         if (!(c->argv = strv_new(path, arg1, NULL))) {
 247                 free(c->path);
 248                 free(c);
 249                 return NULL;
 250         }
 251
 252         return c;
 253 }
 254
 255 static int sysv_exec_commands(Service *s) {
 256         ExecCommand *c;
 257
 258         assert(s);
 259         assert(s->sysv_path);
 260
 261         if (!(c = exec_command_new(s->sysv_path, "start")))
 262                 return -ENOMEM;
 263         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 264
 265         if (!(c = exec_command_new(s->sysv_path, "stop")))
 266                 return -ENOMEM;
 267         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 268
 269         if (!(c = exec_command_new(s->sysv_path, "reload")))
 270                 return -ENOMEM;
 271         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 272
 273         return 0;
 274 }
 275
 276 static int priority_from_rcd(Service *s, const char *init_script) {
 277         char **p;
 278         unsigned i;
 279
 280         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
 281                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
 282                         char *path;
 283                         DIR *d;
 284                         struct dirent *de;
 285
 286                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
 287                                 return -ENOMEM;
 288
 289                         d = opendir(path);
 290                         free(path);
 291
 292                         if (!d) {
 293                                 if (errno != ENOENT)
 294                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
 295
 296                                 continue;
 297                         }
 298
 299                         while ((de = readdir(d))) {
 300                                 int a, b;
 301
 302                                 if (ignore_file(de->d_name))
 303                                         continue;
 304
 305                                 if (de->d_name[0] != 'S')
 306                                         continue;
 307
 308                                 if (strlen(de->d_name) < 4)
 309                                         continue;
 310
 311                                 if (!streq(de->d_name + 3, init_script))
 312                                         continue;
 313
 314                                 /* Yay, we found it! Now decode the priority */
 315
 316                                 a = undecchar(de->d_name[1]);
 317                                 b = undecchar(de->d_name[2]);
 318
 319                                 if (a < 0 || b < 0)
 320                                         continue;
 321
 322                                 s->sysv_start_priority = a*10 + b;
 323
 324                                 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, UNIT(s)->meta.id);
 325
 326                                 closedir(d);
 327                                 return 0;
 328                         }
 329
 330                         closedir(d);
 331                 }
 332
 333         return 0;
 334 }
 335
 336 static int service_load_sysv_path(Service *s, const char *path) {
 337         FILE *f;
 338         Unit *u;
 339         unsigned line = 0;
 340         int r;
 341         enum {
 342                 NORMAL,
 343                 DESCRIPTION,
 344                 LSB,
 345                 LSB_DESCRIPTION
 346         } state = NORMAL;
 347
 348         assert(s);
 349         assert(path);
 350
 351         u = UNIT(s);
 352
 353         if (!(f = fopen(path, "re"))) {
 354                 r = errno == ENOENT ? 0 : -errno;
 355                 goto finish;
 356         }
 357
 358         s->type = SERVICE_FORKING;
 359         s->restart = SERVICE_ONCE;
 360
 361         free(s->sysv_path);
 362         if (!(s->sysv_path = strdup(path))) {
 363                 r = -ENOMEM;
 364                 goto finish;
 365         }
 366
 367         while (!feof(f)) {
 368                 char l[LINE_MAX], *t;
 369
 370                 if (!fgets(l, sizeof(l), f)) {
 371                         if (feof(f))
 372                                 break;
 373
 374                         r = -errno;
 375                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 376                         goto finish;
 377                 }
 378
 379                 line++;
 380
 381                 t = strstrip(l);
 382                 if (*t != '#')
 383                         continue;
 384
 385                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 386                         state = LSB;
 387                         s->sysv_has_lsb = true;
 388                         continue;
 389                 }
 390
 391                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 392                         state = NORMAL;
 393                         continue;
 394                 }
 395
 396                 t++;
 397                 t += strspn(t, WHITESPACE);
 398
 399                 if (state == NORMAL) {
 400
 401                         /* Try to parse Red Hat style chkconfig headers */
 402
 403                         if (startswith(t, "chkconfig:")) {
 404                                 int start_priority;
 405                                 char runlevels[16], *k;
 406
 407                                 state = NORMAL;
 408
 409                                 if (sscanf(t+10, "%15s %i %*i",
 410                                            runlevels,
 411                                            &start_priority) != 2) {
 412
 413                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 414                                         continue;
 415                                 }
 416
 417                                 if (start_priority < 0 || start_priority > 99)
 418                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 419                                 else
 420                                         s->sysv_start_priority = start_priority;
 421
 422                                 char_array_0(runlevels);
 423                                 k = delete_chars(runlevels, WHITESPACE "-");
 424
 425                                 if (k[0]) {
 426                                         char *d;
 427
 428                                         if (!(d = strdup(k))) {
 429                                                 r = -ENOMEM;
 430                                                 goto finish;
 431                                         }
 432
 433                                         free(s->sysv_runlevels);
 434                                         s->sysv_runlevels = d;
 435                                 }
 436
 437
 438                         } else if (startswith(t, "description:")) {
 439
 440                                 size_t k = strlen(t);
 441                                 char *d;
 442
 443                                 if (t[k-1] == '\\') {
 444                                         state = DESCRIPTION;
 445                                         t[k-1] = 0;
 446                                 }
 447
 448                                 if (!(d = strdup(strstrip(t+12)))) {
 449                                         r = -ENOMEM;
 450                                         goto finish;
 451                                 }
 452
 453                                 free(u->meta.description);
 454                                 u->meta.description = d;
 455
 456                         } else if (startswith(t, "pidfile:")) {
 457
 458                                 char *fn;
 459
 460                                 state = NORMAL;
 461
 462                                 fn = strstrip(t+8);
 463                                 if (!path_is_absolute(fn)) {
 464                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 465                                         continue;
 466                                 }
 467
 468                                 if (!(fn = strdup(fn))) {
 469                                         r = -ENOMEM;
 470                                         goto finish;
 471                                 }
 472
 473                                 free(s->pid_file);
 474                                 s->pid_file = fn;
 475                         }
 476
 477                 } else if (state == DESCRIPTION) {
 478
 479                         /* Try to parse Red Hat style description
 480                          * continuation */
 481
 482                         size_t k = strlen(t);
 483                         char *d;
 484
 485                         if (t[k-1] == '\\')
 486                                 t[k-1] = 0;
 487                         else
 488                                 state = NORMAL;
 489
 490                         assert(u->meta.description);
 491                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 492                                 r = -ENOMEM;
 493                                 goto finish;
 494                         }
 495
 496                         free(u->meta.description);
 497                         u->meta.description = d;
 498
 499                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 500
 501                         if (startswith(t, "Provides:")) {
 502                                 char *i, *w;
 503                                 size_t z;
 504
 505                                 state = LSB;
 506
 507                                 FOREACH_WORD(w, z, t+9, i) {
 508                                         char *n, *m;
 509
 510                                         if (!(n = strndup(w, z))) {
 511                                                 r = -ENOMEM;
 512                                                 goto finish;
 513                                         }
 514
 515                                         r = sysv_translate_name(n, &m);
 516                                         free(n);
 517
 518                                         if (r < 0)
 519                                                 goto finish;
 520
 521                                         if (r == 0)
 522                                                 continue;
 523
 524                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 525                                                 r = unit_add_name(u, m);
 526                                         else {
 527                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m, NULL, true)) >= 0)
 528                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 529                                         }
 530
 531                                         free(m);
 532
 533                                         if (r < 0)
 534                                                 goto finish;
 535                                 }
 536
 537                         } else if (startswith(t, "Required-Start:") ||
 538                                    startswith(t, "Should-Start:")) {
 539                                 char *i, *w;
 540                                 size_t z;
 541
 542                                 state = LSB;
 543
 544                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 545                                         char *n, *m;
 546
 547                                         if (!(n = strndup(w, z))) {
 548                                                 r = -ENOMEM;
 549                                                 goto finish;
 550                                         }
 551
 552                                         r = sysv_translate_name(n, &m);
 553                                         free(n);
 554
 555                                         if (r < 0)
 556                                                 goto finish;
 557
 558                                         if (r == 0)
 559                                                 continue;
 560
 561                                         r = unit_add_dependency_by_name(u, UNIT_AFTER, m, NULL, true);
 562                                         free(m);
 563
 564                                         if (r < 0)
 565                                                 goto finish;
 566                                 }
 567                         } else if (startswith(t, "Default-Start:")) {
 568                                 char *k, *d;
 569
 570                                 state = LSB;
 571
 572                                 k = delete_chars(t+14, WHITESPACE "-");
 573
 574                                 if (k[0] != 0) {
 575                                         if (!(d = strdup(k))) {
 576                                                 r = -ENOMEM;
 577                                                 goto finish;
 578                                         }
 579
 580                                         free(s->sysv_runlevels);
 581                                         s->sysv_runlevels = d;
 582                                 }
 583
 584                         } else if (startswith(t, "Description:")) {
 585                                 char *d;
 586
 587                                 state = LSB_DESCRIPTION;
 588
 589                                 if (!(d = strdup(strstrip(t+12)))) {
 590                                         r = -ENOMEM;
 591                                         goto finish;
 592                                 }
 593
 594                                 free(u->meta.description);
 595                                 u->meta.description = d;
 596
 597                         } else if (startswith(t, "Short-Description:") &&
 598                                    !u->meta.description) {
 599                                 char *d;
 600
 601                                 /* We use the short description only
 602                                  * if no long description is set. */
 603
 604                                 state = LSB;
 605
 606                                 if (!(d = strdup(strstrip(t+18)))) {
 607                                         r = -ENOMEM;
 608                                         goto finish;
 609                                 }
 610
 611                                 u->meta.description = d;
 612
 613                         } else if (state == LSB_DESCRIPTION) {
 614
 615                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 616                                         char *d;
 617
 618                                         assert(u->meta.description);
 619                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 620                                                 r = -ENOMEM;
 621                                                 goto finish;
 622                                         }
 623
 624                                         free(u->meta.description);
 625                                         u->meta.description = d;
 626                                 } else
 627                                         state = LSB;
 628                         }
 629                 }
 630         }
 631
 632         /* If init scripts have no LSB header, then we enforce the
 633          * ordering via the chkconfig priorities. We try to determine
 634          * a priority for *all* init scripts here, since they are
 635          * needed as soon as at least one non-LSB script is used. */
 636
 637         if (s->sysv_start_priority < 0) {
 638                 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", u->meta.id);
 639
 640                 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
 641                         goto finish;
 642
 643                 if (s->sysv_start_priority < 0)
 644                         log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", u->meta.id);
 645         }
 646
 647         if ((r = sysv_exec_commands(s)) < 0)
 648                 goto finish;
 649
 650         if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
 651                 /* If there a runlevels configured for this service
 652                  * but none of the standard ones, then we assume this
 653                  * is some special kind of service (which might be
 654                  * needed for early boot) and don't create any links
 655                  * to it. */
 656
 657                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0 ||
 658                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 659                         goto finish;
 660         }
 661
 662         /* Special setting for all SysV services */
 663         s->valid_no_process = true;
 664
 665         /* Don't timeout special services during boot (like fsck) */
 666         if (s->sysv_runlevels && !chars_intersect("12345", s->sysv_runlevels))
 667                 s->timeout_usec = -1;
 668
 669         u->meta.load_state = UNIT_LOADED;
 670         r = 0;
 671
 672 finish:
 673
 674         if (f)
 675                 fclose(f);
 676
 677         return r;
 678 }
 679
 680 static int service_load_sysv_name(Service *s, const char *name) {
 681         char **p;
 682
 683         assert(s);
 684         assert(name);
 685
 686         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 687                 char *path;
 688                 int r;
 689
 690                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 691                         return -ENOMEM;
 692
 693                 assert(endswith(path, ".service"));
 694                 path[strlen(path)-8] = 0;
 695
 696                 r = service_load_sysv_path(s, path);
 697                 free(path);
 698
 699                 if (r < 0)
 700                         return r;
 701
 702                 if ((UNIT(s)->meta.load_state != UNIT_STUB))
 703                         break;
 704         }
 705
 706         return 0;
 707 }
 708
 709 static int service_load_sysv(Service *s) {
 710         const char *t;
 711         Iterator i;
 712         int r;
 713
 714         assert(s);
 715
 716         /* Load service data from SysV init scripts, preferably with
 717          * LSB headers ... */
 718
 719         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 720                 return 0;
 721
 722         if ((t = UNIT(s)->meta.id))
 723                 if ((r = service_load_sysv_name(s, t)) < 0)
 724                         return r;
 725
 726         if (UNIT(s)->meta.load_state == UNIT_STUB)
 727                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 728                         if (t == UNIT(s)->meta.id)
 729                                 continue;
 730
 731                         if ((r == service_load_sysv_name(s, t)) < 0)
 732                                 return r;
 733
 734                         if (UNIT(s)->meta.load_state != UNIT_STUB)
 735                                 break;
 736                 }
 737
 738         return 0;
 739 }
 740
 741 static int service_add_bus_name(Service *s) {
 742         char *n;
 743         int r;
 744
 745         assert(s);
 746         assert(s->bus_name);
 747
 748         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 749                 return 0;
 750
 751         r = unit_merge_by_name(UNIT(s), n);
 752         free(n);
 753
 754         return r;
 755 }
 756
 757 static int service_verify(Service *s) {
 758         assert(s);
 759
 760         if (UNIT(s)->meta.load_state != UNIT_LOADED)
 761                 return 0;
 762
 763         if (!s->exec_command[SERVICE_EXEC_START]) {
 764                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->meta.id);
 765                 return -EINVAL;
 766         }
 767
 768         if (s->type == SERVICE_DBUS && !s->bus_name) {
 769                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->meta.id);
 770                 return -EINVAL;
 771         }
 772
 773         return 0;
 774 }
 775
 776 static int service_load(Unit *u) {
 777         int r;
 778         Service *s = SERVICE(u);
 779
 780         assert(s);
 781
 782         /* Load a .service file */
 783         if ((r = unit_load_fragment(u)) < 0)
 784                 return r;
 785
 786         /* Load a classic init script as a fallback, if we couldn't find anything */
 787         if (u->meta.load_state == UNIT_STUB)
 788                 if ((r = service_load_sysv(s)) < 0)
 789                         return r;
 790
 791         /* Still nothing found? Then let's give up */
 792         if (u->meta.load_state == UNIT_STUB)
 793                 return -ENOENT;
 794
 795         /* We were able to load something, then let's add in the
 796          * dropin directories. */
 797         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 798                 return r;
 799
 800         /* This is a new unit? Then let's add in some extras */
 801         if (u->meta.load_state == UNIT_LOADED) {
 802                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 803                         return r;
 804
 805                 if ((r = unit_add_default_cgroup(u)) < 0)
 806                         return r;
 807
 808                 if ((r = sysv_chkconfig_order(s)) < 0)
 809                         return r;
 810
 811                 if (s->bus_name) {
 812                         if ((r = service_add_bus_name(s)) < 0)
 813                                 return r;
 814
 815                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 816                             return r;
 817                 }
 818         }
 819
 820         return service_verify(s);
 821 }
 822
 823 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 824
 825         ServiceExecCommand c;
 826         Service *s = SERVICE(u);
 827         const char *prefix2;
 828         char *p2;
 829
 830         assert(s);
 831
 832         p2 = strappend(prefix, "\t");
 833         prefix2 = p2 ? p2 : prefix;
 834
 835         fprintf(f,
 836                 "%sService State: %s\n"
 837                 "%sPermissionsStartOnly: %s\n"
 838                 "%sRootDirectoryStartOnly: %s\n"
 839                 "%sValidNoProcess: %s\n"
 840                 "%sKillMode: %s\n"
 841                 "%sType: %s\n",
 842                 prefix, service_state_to_string(s->state),
 843                 prefix, yes_no(s->permissions_start_only),
 844                 prefix, yes_no(s->root_directory_start_only),
 845                 prefix, yes_no(s->valid_no_process),
 846                 prefix, kill_mode_to_string(s->kill_mode),
 847                 prefix, service_type_to_string(s->type));
 848
 849         if (s->control_pid > 0)
 850                 fprintf(f,
 851                         "%sControl PID: %llu\n",
 852                         prefix, (unsigned long long) s->control_pid);
 853
 854         if (s->main_pid > 0)
 855                 fprintf(f,
 856                         "%sMain PID: %llu\n",
 857                         prefix, (unsigned long long) s->main_pid);
 858
 859         if (s->pid_file)
 860                 fprintf(f,
 861                         "%sPIDFile: %s\n",
 862                         prefix, s->pid_file);
 863
 864         if (s->bus_name)
 865                 fprintf(f,
 866                         "%sBusName: %s\n"
 867                         "%sBus Name Good: %s\n",
 868                         prefix, s->bus_name,
 869                         prefix, yes_no(s->bus_name_good));
 870
 871         exec_context_dump(&s->exec_context, f, prefix);
 872
 873         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 874
 875                 if (!s->exec_command[c])
 876                         continue;
 877
 878                 fprintf(f, "%s-> %s:\n",
 879                         prefix, service_exec_command_to_string(c));
 880
 881                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 882         }
 883
 884         if (s->sysv_path)
 885                 fprintf(f,
 886                         "%sSysV Init Script Path: %s\n"
 887                         "%sSysV Init Script has LSB Header: %s\n",
 888                         prefix, s->sysv_path,
 889                         prefix, yes_no(s->sysv_has_lsb));
 890
 891         if (s->sysv_start_priority >= 0)
 892                 fprintf(f,
 893                         "%sSysVStartPriority: %i\n",
 894                         prefix, s->sysv_start_priority);
 895
 896         if (s->sysv_runlevels)
 897                 fprintf(f, "%sSysVRunLevels: %s\n",
 898                         prefix, s->sysv_runlevels);
 899
 900         free(p2);
 901 }
 902
 903 static int service_load_pid_file(Service *s) {
 904         char *k;
 905         unsigned long p;
 906         int r;
 907
 908         assert(s);
 909
 910         if (s->main_pid_known)
 911                 return 0;
 912
 913         assert(s->main_pid <= 0);
 914
 915         if (!s->pid_file)
 916                 return -ENOENT;
 917
 918         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 919                 return r;
 920
 921         if ((r = safe_atolu(k, &p)) < 0) {
 922                 free(k);
 923                 return r;
 924         }
 925
 926         if ((unsigned long) (pid_t) p != p)
 927                 return -ERANGE;
 928
 929         if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
 930                 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
 931                             (unsigned long long) p, s->pid_file);
 932                 return -ESRCH;
 933         }
 934
 935         if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
 936                 /* FIXME: we need to do something here */
 937                 return r;
 938
 939         s->main_pid = (pid_t) p;
 940         s->main_pid_known = true;
 941
 942         return 0;
 943 }
 944
 945 static int service_get_sockets(Service *s, Set **_set) {
 946         Set *set;
 947         Iterator i;
 948         char *t;
 949         int r;
 950
 951         assert(s);
 952         assert(_set);
 953
 954         /* Collects all Socket objects that belong to this
 955          * service. Note that a service might have multiple sockets
 956          * via multiple names. */
 957
 958         if (!(set = set_new(NULL, NULL)))
 959                 return -ENOMEM;
 960
 961         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 962                 char *k;
 963                 Unit *p;
 964
 965                 /* Look for all socket objects that go by any of our
 966                  * units and collect their fds */
 967
 968                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 969                         r = -ENOMEM;
 970                         goto fail;
 971                 }
 972
 973                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 974                 free(k);
 975
 976                 if (!p)
 977                         continue;
 978
 979                 if ((r = set_put(set, p)) < 0)
 980                         goto fail;
 981         }
 982
 983         *_set = set;
 984         return 0;
 985
 986 fail:
 987         set_free(set);
 988         return r;
 989 }
 990
 991 static int service_notify_sockets_dead(Service *s) {
 992         Iterator i;
 993         Set *set;
 994         Socket *sock;
 995         int r;
 996
 997         assert(s);
 998
 999         /* Notifies all our sockets when we die */
1000         if ((r = service_get_sockets(s, &set)) < 0)
1001                 return r;
1002
1003         SET_FOREACH(sock, set, i)
1004                 socket_notify_service_dead(sock);
1005
1006         set_free(set);
1007
1008         return 0;
1009 }
1010
1011 static void service_set_state(Service *s, ServiceState state) {
1012         ServiceState old_state;
1013         assert(s);
1014
1015         old_state = s->state;
1016         s->state = state;
1017
1018         if (state != SERVICE_START_PRE &&
1019             state != SERVICE_START &&
1020             state != SERVICE_START_POST &&
1021             state != SERVICE_RELOAD &&
1022             state != SERVICE_STOP &&
1023             state != SERVICE_STOP_SIGTERM &&
1024             state != SERVICE_STOP_SIGKILL &&
1025             state != SERVICE_STOP_POST &&
1026             state != SERVICE_FINAL_SIGTERM &&
1027             state != SERVICE_FINAL_SIGKILL &&
1028             state != SERVICE_AUTO_RESTART)
1029                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1030
1031         if (state != SERVICE_START &&
1032             state != SERVICE_START_POST &&
1033             state != SERVICE_RUNNING &&
1034             state != SERVICE_RELOAD &&
1035             state != SERVICE_STOP &&
1036             state != SERVICE_STOP_SIGTERM &&
1037             state != SERVICE_STOP_SIGKILL)
1038                 service_unwatch_main_pid(s);
1039
1040         if (state != SERVICE_START_PRE &&
1041             state != SERVICE_START &&
1042             state != SERVICE_START_POST &&
1043             state != SERVICE_RELOAD &&
1044             state != SERVICE_STOP &&
1045             state != SERVICE_STOP_SIGTERM &&
1046             state != SERVICE_STOP_SIGKILL &&
1047             state != SERVICE_STOP_POST &&
1048             state != SERVICE_FINAL_SIGTERM &&
1049             state != SERVICE_FINAL_SIGKILL) {
1050                 service_unwatch_control_pid(s);
1051                 s->control_command = NULL;
1052                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1053         }
1054
1055         if (state == SERVICE_DEAD ||
1056             state == SERVICE_STOP ||
1057             state == SERVICE_STOP_SIGTERM ||
1058             state == SERVICE_STOP_SIGKILL ||
1059             state == SERVICE_STOP_POST ||
1060             state == SERVICE_FINAL_SIGTERM ||
1061             state == SERVICE_FINAL_SIGKILL ||
1062             state == SERVICE_MAINTAINANCE ||
1063             state == SERVICE_AUTO_RESTART)
1064                 service_notify_sockets_dead(s);
1065
1066         if (state != SERVICE_START_PRE &&
1067             state != SERVICE_START &&
1068             !(state == SERVICE_DEAD && UNIT(s)->meta.job))
1069                 service_close_socket_fd(s);
1070
1071         if (old_state != state)
1072                 log_debug("%s changed %s -> %s", UNIT(s)->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1073
1074         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1075 }
1076
1077 static int service_coldplug(Unit *u) {
1078         Service *s = SERVICE(u);
1079         int r;
1080
1081         assert(s);
1082         assert(s->state == SERVICE_DEAD);
1083
1084         if (s->deserialized_state != s->state) {
1085
1086                 if (s->deserialized_state == SERVICE_START_PRE ||
1087                     s->deserialized_state == SERVICE_START ||
1088                     s->deserialized_state == SERVICE_START_POST ||
1089                     s->deserialized_state == SERVICE_RELOAD ||
1090                     s->deserialized_state == SERVICE_STOP ||
1091                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1092                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1093                     s->deserialized_state == SERVICE_STOP_POST ||
1094                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1095                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1096                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1097
1098                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1099                                 usec_t k;
1100
1101                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1102
1103                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1104                                         return r;
1105                         }
1106                 }
1107
1108                 if ((s->deserialized_state == SERVICE_START &&
1109                      (s->type == SERVICE_FORKING ||
1110                       s->type == SERVICE_DBUS)) ||
1111                     s->deserialized_state == SERVICE_START_POST ||
1112                     s->deserialized_state == SERVICE_RUNNING ||
1113                     s->deserialized_state == SERVICE_RELOAD ||
1114                     s->deserialized_state == SERVICE_STOP ||
1115                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1116                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1117                         if (s->main_pid > 0)
1118                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1119                                         return r;
1120
1121                 if (s->deserialized_state == SERVICE_START_PRE ||
1122                     s->deserialized_state == SERVICE_START ||
1123                     s->deserialized_state == SERVICE_START_POST ||
1124                     s->deserialized_state == SERVICE_RELOAD ||
1125                     s->deserialized_state == SERVICE_STOP ||
1126                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1127                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1128                     s->deserialized_state == SERVICE_STOP_POST ||
1129                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1130                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1131                         if (s->control_pid > 0)
1132                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1133                                         return r;
1134
1135                 service_set_state(s, s->deserialized_state);
1136         }
1137
1138         return 0;
1139 }
1140
1141 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1142         Iterator i;
1143         int r;
1144         int *rfds = NULL;
1145         unsigned rn_fds = 0;
1146         Set *set;
1147         Socket *sock;
1148
1149         assert(s);
1150         assert(fds);
1151         assert(n_fds);
1152
1153         if ((r = service_get_sockets(s, &set)) < 0)
1154                 return r;
1155
1156         SET_FOREACH(sock, set, i) {
1157                 int *cfds;
1158                 unsigned cn_fds;
1159
1160                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1161                         goto fail;
1162
1163                 if (!cfds)
1164                         continue;
1165
1166                 if (!rfds) {
1167                         rfds = cfds;
1168                         rn_fds = cn_fds;
1169                 } else {
1170                         int *t;
1171
1172                         if (!(t = new(int, rn_fds+cn_fds))) {
1173                                 free(cfds);
1174                                 r = -ENOMEM;
1175                                 goto fail;
1176                         }
1177
1178                         memcpy(t, rfds, rn_fds);
1179                         memcpy(t+rn_fds, cfds, cn_fds);
1180                         free(rfds);
1181                         free(cfds);
1182
1183                         rfds = t;
1184                         rn_fds = rn_fds+cn_fds;
1185                 }
1186         }
1187
1188         *fds = rfds;
1189         *n_fds = rn_fds;
1190
1191         set_free(set);
1192
1193         return 0;
1194
1195 fail:
1196         set_free(set);
1197         free(rfds);
1198
1199         return r;
1200 }
1201
1202 static int service_spawn(
1203                 Service *s,
1204                 ExecCommand *c,
1205                 bool timeout,
1206                 bool pass_fds,
1207                 bool apply_permissions,
1208                 bool apply_chroot,
1209                 pid_t *_pid) {
1210
1211         pid_t pid;
1212         int r;
1213         int *fds = NULL;
1214         unsigned n_fds = 0;
1215         char **argv;
1216
1217         assert(s);
1218         assert(c);
1219         assert(_pid);
1220
1221         if (pass_fds) {
1222                 if (s->socket_fd >= 0) {
1223                         fds = &s->socket_fd;
1224                         n_fds = 1;
1225                 } else if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1226                         goto fail;
1227         }
1228
1229         if (timeout && s->timeout_usec) {
1230                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1231                         goto fail;
1232         } else
1233                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1234
1235         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1236                 r = -ENOMEM;
1237                 goto fail;
1238         }
1239
1240         r = exec_spawn(c,
1241                        argv,
1242                        &s->exec_context,
1243                        fds, n_fds,
1244                        apply_permissions,
1245                        apply_chroot,
1246                        UNIT(s)->meta.manager->confirm_spawn,
1247                        UNIT(s)->meta.cgroup_bondings,
1248                        &pid);
1249
1250         strv_free(argv);
1251         if (r < 0)
1252                 goto fail;
1253
1254         if (fds) {
1255                 if (s->socket_fd >= 0)
1256                         service_close_socket_fd(s);
1257                 else
1258                         free(fds);
1259         }
1260
1261         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1262                 /* FIXME: we need to do something here */
1263                 goto fail;
1264
1265         *_pid = pid;
1266
1267         return 0;
1268
1269 fail:
1270         free(fds);
1271
1272         if (timeout)
1273                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1274
1275         return r;
1276 }
1277
1278 static int main_pid_good(Service *s) {
1279         assert(s);
1280
1281         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1282          * don't know */
1283
1284         /* If we know the pid file, then lets just check if it is
1285          * still valid */
1286         if (s->main_pid_known)
1287                 return s->main_pid > 0;
1288
1289         /* We don't know the pid */
1290         return -EAGAIN;
1291 }
1292
1293 static int control_pid_good(Service *s) {
1294         assert(s);
1295
1296         return s->control_pid > 0;
1297 }
1298
1299 static int cgroup_good(Service *s) {
1300         int r;
1301
1302         assert(s);
1303
1304         if (s->valid_no_process)
1305                 return -EAGAIN;
1306
1307         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1308                 return r;
1309
1310         return !r;
1311 }
1312
1313 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1314         int r;
1315         assert(s);
1316
1317         if (!success)
1318                 s->failure = true;
1319
1320         if (allow_restart &&
1321             s->allow_restart &&
1322             (s->restart == SERVICE_RESTART_ALWAYS ||
1323              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1324
1325                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1326                         goto fail;
1327
1328                 service_set_state(s, SERVICE_AUTO_RESTART);
1329         } else
1330                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1331
1332         return;
1333
1334 fail:
1335         log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1336         service_enter_dead(s, false, false);
1337 }
1338
1339 static void service_enter_signal(Service *s, ServiceState state, bool success);
1340
1341 static void service_enter_stop_post(Service *s, bool success) {
1342         int r;
1343         assert(s);
1344
1345         if (!success)
1346                 s->failure = true;
1347
1348         service_unwatch_control_pid(s);
1349
1350         s->control_command_id = SERVICE_EXEC_STOP_POST;
1351         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
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
1362                 service_set_state(s, SERVICE_STOP_POST);
1363         } else
1364                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1365
1366         return;
1367
1368 fail:
1369         log_warning("%s failed to run stop-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1370         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1371 }
1372
1373 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1374         int r;
1375         bool sent = false;
1376
1377         assert(s);
1378
1379         if (!success)
1380                 s->failure = true;
1381
1382         if (s->kill_mode != KILL_NONE) {
1383                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1384
1385                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1386
1387                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1388                                 if (r != -EAGAIN && r != -ESRCH)
1389                                         goto fail;
1390                         } else
1391                                 sent = true;
1392                 }
1393
1394                 if (!sent) {
1395                         r = 0;
1396
1397                         if (s->main_pid > 0) {
1398                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1399                                         r = -errno;
1400                                 else
1401                                         sent = true;
1402                         }
1403
1404                         if (s->control_pid > 0) {
1405                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1406                                         r = -errno;
1407                                 else
1408                                         sent = true;
1409                         }
1410
1411                         if (r < 0)
1412                                 goto fail;
1413                 }
1414         }
1415
1416         if (sent) {
1417                 if (s->timeout_usec > 0)
1418                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1419                                 goto fail;
1420
1421                 service_set_state(s, state);
1422         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1423                 service_enter_stop_post(s, true);
1424         else
1425                 service_enter_dead(s, true, true);
1426
1427         return;
1428
1429 fail:
1430         log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1431
1432         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1433                 service_enter_stop_post(s, false);
1434         else
1435                 service_enter_dead(s, false, true);
1436 }
1437
1438 static void service_enter_stop(Service *s, bool success) {
1439         int r;
1440         assert(s);
1441
1442         if (!success)
1443                 s->failure = true;
1444
1445         service_unwatch_control_pid(s);
1446
1447         s->control_command_id = SERVICE_EXEC_STOP;
1448         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1449                 if ((r = service_spawn(s,
1450                                        s->control_command,
1451                                        true,
1452                                        false,
1453                                        !s->permissions_start_only,
1454                                        !s->root_directory_start_only,
1455                                        &s->control_pid)) < 0)
1456                         goto fail;
1457
1458                 service_set_state(s, SERVICE_STOP);
1459         } else
1460                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1461
1462         return;
1463
1464 fail:
1465         log_warning("%s failed to run stop executable: %s", UNIT(s)->meta.id, strerror(-r));
1466         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1467 }
1468
1469 static void service_enter_running(Service *s, bool success) {
1470         assert(s);
1471
1472         if (!success)
1473                 s->failure = true;
1474
1475         if (main_pid_good(s) != 0 &&
1476             cgroup_good(s) != 0 &&
1477             (s->bus_name_good || s->type != SERVICE_DBUS))
1478                 service_set_state(s, SERVICE_RUNNING);
1479         else if (s->valid_no_process)
1480                 service_set_state(s, SERVICE_EXITED);
1481         else
1482                 service_enter_stop(s, true);
1483 }
1484
1485 static void service_enter_start_post(Service *s) {
1486         int r;
1487         assert(s);
1488
1489         service_unwatch_control_pid(s);
1490
1491         s->control_command_id = SERVICE_EXEC_START_POST;
1492         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1493                 if ((r = service_spawn(s,
1494                                        s->control_command,
1495                                        true,
1496                                        false,
1497                                        !s->permissions_start_only,
1498                                        !s->root_directory_start_only,
1499                                        &s->control_pid)) < 0)
1500                         goto fail;
1501
1502
1503                 service_set_state(s, SERVICE_START_POST);
1504         } else
1505                 service_enter_running(s, true);
1506
1507         return;
1508
1509 fail:
1510         log_warning("%s failed to run start-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1511         service_enter_stop(s, false);
1512 }
1513
1514 static void service_enter_start(Service *s) {
1515         pid_t pid;
1516         int r;
1517
1518         assert(s);
1519
1520         assert(s->exec_command[SERVICE_EXEC_START]);
1521         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1522
1523         if (s->type == SERVICE_FORKING)
1524                 service_unwatch_control_pid(s);
1525         else
1526                 service_unwatch_main_pid(s);
1527
1528         if ((r = service_spawn(s,
1529                                s->exec_command[SERVICE_EXEC_START],
1530                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS,
1531                                true,
1532                                true,
1533                                true,
1534                                &pid)) < 0)
1535                 goto fail;
1536
1537         if (s->type == SERVICE_SIMPLE) {
1538                 /* For simple services we immediately start
1539                  * the START_POST binaries. */
1540
1541                 s->main_pid = pid;
1542                 s->main_pid_known = true;
1543
1544                 service_enter_start_post(s);
1545
1546         } else  if (s->type == SERVICE_FORKING) {
1547
1548                 /* For forking services we wait until the start
1549                  * process exited. */
1550
1551                 s->control_pid = pid;
1552
1553                 s->control_command_id = SERVICE_EXEC_START;
1554                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1555                 service_set_state(s, SERVICE_START);
1556
1557         } else if (s->type == SERVICE_FINISH ||
1558                    s->type == SERVICE_DBUS) {
1559
1560                 /* For finishing services we wait until the start
1561                  * process exited, too, but it is our main process. */
1562
1563                 /* For D-Bus services we know the main pid right away,
1564                  * but wait for the bus name to appear on the bus. */
1565
1566                 s->main_pid = pid;
1567                 s->main_pid_known = true;
1568
1569                 service_set_state(s, SERVICE_START);
1570         } else
1571                 assert_not_reached("Unknown service type");
1572
1573         return;
1574
1575 fail:
1576         log_warning("%s failed to run start exectuable: %s", UNIT(s)->meta.id, strerror(-r));
1577         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1578 }
1579
1580 static void service_enter_start_pre(Service *s) {
1581         int r;
1582
1583         assert(s);
1584
1585         service_unwatch_control_pid(s);
1586
1587         s->control_command_id = SERVICE_EXEC_START_PRE;
1588         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1589                 if ((r = service_spawn(s,
1590                                        s->control_command,
1591                                        true,
1592                                        false,
1593                                        !s->permissions_start_only,
1594                                        !s->root_directory_start_only,
1595                                        &s->control_pid)) < 0)
1596                         goto fail;
1597
1598                 service_set_state(s, SERVICE_START_PRE);
1599         } else
1600                 service_enter_start(s);
1601
1602         return;
1603
1604 fail:
1605         log_warning("%s failed to run start-pre executable: %s", UNIT(s)->meta.id, strerror(-r));
1606         service_enter_dead(s, false, true);
1607 }
1608
1609 static void service_enter_restart(Service *s) {
1610         int r;
1611         assert(s);
1612
1613         service_enter_dead(s, true, false);
1614
1615         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1616                 goto fail;
1617
1618         log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1619         return;
1620
1621 fail:
1622
1623         log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1624         service_enter_dead(s, false, false);
1625 }
1626
1627 static void service_enter_reload(Service *s) {
1628         int r;
1629
1630         assert(s);
1631
1632         service_unwatch_control_pid(s);
1633
1634         s->control_command_id = SERVICE_EXEC_RELOAD;
1635         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1636                 if ((r = service_spawn(s,
1637                                        s->control_command,
1638                                        true,
1639                                        false,
1640                                        !s->permissions_start_only,
1641                                        !s->root_directory_start_only,
1642                                        &s->control_pid)) < 0)
1643                         goto fail;
1644
1645                 service_set_state(s, SERVICE_RELOAD);
1646         } else
1647                 service_enter_running(s, true);
1648
1649         return;
1650
1651 fail:
1652         log_warning("%s failed to run reload executable: %s", UNIT(s)->meta.id, strerror(-r));
1653         service_enter_stop(s, false);
1654 }
1655
1656 static void service_run_next(Service *s, bool success) {
1657         int r;
1658
1659         assert(s);
1660         assert(s->control_command);
1661         assert(s->control_command->command_next);
1662
1663         if (!success)
1664                 s->failure = true;
1665
1666         s->control_command = s->control_command->command_next;
1667
1668         service_unwatch_control_pid(s);
1669
1670         if ((r = service_spawn(s,
1671                                s->control_command,
1672                                true,
1673                                false,
1674                                !s->permissions_start_only,
1675                                !s->root_directory_start_only,
1676                                &s->control_pid)) < 0)
1677                 goto fail;
1678
1679         return;
1680
1681 fail:
1682         log_warning("%s failed to run spawn next executable: %s", UNIT(s)->meta.id, strerror(-r));
1683
1684         if (s->state == SERVICE_START_PRE)
1685                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1686         else if (s->state == SERVICE_STOP)
1687                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1688         else if (s->state == SERVICE_STOP_POST)
1689                 service_enter_dead(s, false, true);
1690         else
1691                 service_enter_stop(s, false);
1692 }
1693
1694 static int service_start(Unit *u) {
1695         Service *s = SERVICE(u);
1696
1697         assert(s);
1698
1699         /* We cannot fulfill this request right now, try again later
1700          * please! */
1701         if (s->state == SERVICE_STOP ||
1702             s->state == SERVICE_STOP_SIGTERM ||
1703             s->state == SERVICE_STOP_SIGKILL ||
1704             s->state == SERVICE_STOP_POST ||
1705             s->state == SERVICE_FINAL_SIGTERM ||
1706             s->state == SERVICE_FINAL_SIGKILL)
1707                 return -EAGAIN;
1708
1709         /* Already on it! */
1710         if (s->state == SERVICE_START_PRE ||
1711             s->state == SERVICE_START ||
1712             s->state == SERVICE_START_POST)
1713                 return 0;
1714
1715         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1716
1717         /* Make sure we don't enter a busy loop of some kind. */
1718         if (!ratelimit_test(&s->ratelimit)) {
1719                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1720                 return -EAGAIN;
1721         }
1722
1723         s->failure = false;
1724         s->main_pid_known = false;
1725         s->allow_restart = true;
1726
1727         service_enter_start_pre(s);
1728         return 0;
1729 }
1730
1731 static int service_stop(Unit *u) {
1732         Service *s = SERVICE(u);
1733
1734         assert(s);
1735
1736         /* Cannot do this now */
1737         if (s->state == SERVICE_START_PRE ||
1738             s->state == SERVICE_START ||
1739             s->state == SERVICE_START_POST ||
1740             s->state == SERVICE_RELOAD)
1741                 return -EAGAIN;
1742
1743         /* Already on it */
1744         if (s->state == SERVICE_STOP ||
1745             s->state == SERVICE_STOP_SIGTERM ||
1746             s->state == SERVICE_STOP_SIGKILL ||
1747             s->state == SERVICE_STOP_POST ||
1748             s->state == SERVICE_FINAL_SIGTERM ||
1749             s->state == SERVICE_FINAL_SIGKILL)
1750                 return 0;
1751
1752         if (s->state == SERVICE_AUTO_RESTART) {
1753                 service_set_state(s, SERVICE_DEAD);
1754                 return 0;
1755         }
1756
1757         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1758
1759         /* This is a user request, so don't do restarts on this
1760          * shutdown. */
1761         s->allow_restart = false;
1762
1763         service_enter_stop(s, true);
1764         return 0;
1765 }
1766
1767 static int service_reload(Unit *u) {
1768         Service *s = SERVICE(u);
1769
1770         assert(s);
1771
1772         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1773
1774         service_enter_reload(s);
1775         return 0;
1776 }
1777
1778 static bool service_can_reload(Unit *u) {
1779         Service *s = SERVICE(u);
1780
1781         assert(s);
1782
1783         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1784 }
1785
1786 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1787         Service *s = SERVICE(u);
1788
1789         assert(u);
1790         assert(f);
1791         assert(fds);
1792
1793         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1794         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1795
1796         if (s->control_pid > 0)
1797                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) (s->control_pid));
1798
1799         if (s->main_pid > 0)
1800                 unit_serialize_item_format(u, f, "main-pid", "%u", (unsigned) (s->main_pid));
1801
1802         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1803
1804         /* There's a minor uncleanliness here: if there are multiple
1805          * commands attached here, we will start from the first one
1806          * again */
1807         if (s->control_command_id >= 0)
1808                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(s->control_command_id));
1809
1810         if (s->socket_fd >= 0) {
1811                 int copy;
1812
1813                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1814                         return copy;
1815
1816                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1817         }
1818
1819         return 0;
1820 }
1821
1822 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1823         Service *s = SERVICE(u);
1824         int r;
1825
1826         assert(u);
1827         assert(key);
1828         assert(value);
1829         assert(fds);
1830
1831         if (streq(key, "state")) {
1832                 ServiceState state;
1833
1834                 if ((state = service_state_from_string(value)) < 0)
1835                         log_debug("Failed to parse state value %s", value);
1836                 else
1837                         s->deserialized_state = state;
1838         } else if (streq(key, "failure")) {
1839                 int b;
1840
1841                 if ((b = parse_boolean(value)) < 0)
1842                         log_debug("Failed to parse failure value %s", value);
1843                 else
1844                         s->failure = b || s->failure;
1845         } else if (streq(key, "control-pid")) {
1846                 unsigned pid;
1847
1848                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1849                         log_debug("Failed to parse control-pid value %s", value);
1850                 else
1851                         s->control_pid = (pid_t) pid;
1852         } else if (streq(key, "main-pid")) {
1853                 unsigned pid;
1854
1855                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1856                         log_debug("Failed to parse main-pid value %s", value);
1857                 else
1858                         s->main_pid = (pid_t) pid;
1859         } else if (streq(key, "main-pid-known")) {
1860                 int b;
1861
1862                 if ((b = parse_boolean(value)) < 0)
1863                         log_debug("Failed to parse main-pid-known value %s", value);
1864                 else
1865                         s->main_pid_known = b;
1866         } else if (streq(key, "control-command")) {
1867                 ServiceExecCommand id;
1868
1869                 if ((id = service_exec_command_from_string(value)) < 0)
1870                         log_debug("Failed to parse exec-command value %s", value);
1871                 else {
1872                         s->control_command_id = id;
1873                         s->control_command = s->exec_command[id];
1874                 }
1875         } else if (streq(key, "socket-fd")) {
1876                 int fd;
1877
1878                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1879                         log_debug("Failed to parse socket-fd value %s", value);
1880                 else {
1881
1882                         if (s->socket_fd >= 0)
1883                                 close_nointr_nofail(s->socket_fd);
1884                         s->socket_fd = fdset_remove(fds, fd);
1885                 }
1886         } else
1887                 log_debug("Unknown serialization key '%s'", key);
1888
1889         return 0;
1890 }
1891
1892 static UnitActiveState service_active_state(Unit *u) {
1893         assert(u);
1894
1895         return state_translation_table[SERVICE(u)->state];
1896 }
1897
1898 static const char *service_sub_state_to_string(Unit *u) {
1899         assert(u);
1900
1901         return service_state_to_string(SERVICE(u)->state);
1902 }
1903
1904 static bool service_check_gc(Unit *u) {
1905         Service *s = SERVICE(u);
1906
1907         assert(s);
1908
1909         return !!s->sysv_path;
1910 }
1911
1912 static bool service_check_snapshot(Unit *u) {
1913         Service *s = SERVICE(u);
1914
1915         assert(s);
1916
1917         return !s->got_socket_fd;
1918 }
1919
1920 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1921         Service *s = SERVICE(u);
1922         bool success;
1923
1924         assert(s);
1925         assert(pid >= 0);
1926
1927         success = code == CLD_EXITED && status == 0;
1928         s->failure = s->failure || !success;
1929
1930         if (s->main_pid == pid) {
1931
1932                 exec_status_fill(&s->main_exec_status, pid, code, status);
1933                 s->main_pid = 0;
1934
1935                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1936                         assert(s->exec_command[SERVICE_EXEC_START]);
1937                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1938                 }
1939
1940                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
1941
1942                 /* The service exited, so the service is officially
1943                  * gone. */
1944
1945                 switch (s->state) {
1946
1947                 case SERVICE_START_POST:
1948                 case SERVICE_RELOAD:
1949                 case SERVICE_STOP:
1950                         /* Need to wait until the operation is
1951                          * done */
1952                         break;
1953
1954                 case SERVICE_START:
1955                         assert(s->type == SERVICE_FINISH);
1956
1957                         /* This was our main goal, so let's go on */
1958                         if (success)
1959                                 service_enter_start_post(s);
1960                         else
1961                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1962                         break;
1963
1964                 case SERVICE_RUNNING:
1965                         service_enter_running(s, success);
1966                         break;
1967
1968                 case SERVICE_STOP_SIGTERM:
1969                 case SERVICE_STOP_SIGKILL:
1970
1971                         if (!control_pid_good(s))
1972                                 service_enter_stop_post(s, success);
1973
1974                         /* If there is still a control process, wait for that first */
1975                         break;
1976
1977                 default:
1978                         assert_not_reached("Uh, main process died at wrong time.");
1979                 }
1980
1981         } else if (s->control_pid == pid) {
1982
1983                 if (s->control_command)
1984                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
1985
1986                 s->control_pid = 0;
1987
1988                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1989
1990                 /* If we are shutting things down anyway we
1991                  * don't care about failing commands. */
1992
1993                 if (s->control_command && s->control_command->command_next && success) {
1994
1995                         /* There is another command to *
1996                          * execute, so let's do that. */
1997
1998                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
1999                         service_run_next(s, success);
2000
2001                 } else {
2002                         /* No further commands for this step, so let's
2003                          * figure out what to do next */
2004
2005                         s->control_command = NULL;
2006                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2007
2008                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2009
2010                         switch (s->state) {
2011
2012                         case SERVICE_START_PRE:
2013                                 if (success)
2014                                         service_enter_start(s);
2015                                 else
2016                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2017                                 break;
2018
2019                         case SERVICE_START:
2020                                 assert(s->type == SERVICE_FORKING);
2021
2022                                 /* Let's try to load the pid
2023                                  * file here if we can. We
2024                                  * ignore the return value,
2025                                  * since the PID file might
2026                                  * actually be created by a
2027                                  * START_POST script */
2028
2029                                 if (success) {
2030                                         if (s->pid_file)
2031                                                 service_load_pid_file(s);
2032
2033                                         service_enter_start_post(s);
2034                                 } else
2035                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2036
2037                                 break;
2038
2039                         case SERVICE_START_POST:
2040                                 if (success && s->pid_file && !s->main_pid_known) {
2041                                         int r;
2042
2043                                         /* Hmm, let's see if we can
2044                                          * load the pid now after the
2045                                          * start-post scripts got
2046                                          * executed. */
2047
2048                                         if ((r = service_load_pid_file(s)) < 0)
2049                                                 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
2050                                 }
2051
2052                                 /* Fall through */
2053
2054                         case SERVICE_RELOAD:
2055                                 if (success)
2056                                         service_enter_running(s, true);
2057                                 else
2058                                         service_enter_stop(s, false);
2059
2060                                 break;
2061
2062                         case SERVICE_STOP:
2063                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2064                                 break;
2065
2066                         case SERVICE_STOP_SIGTERM:
2067                         case SERVICE_STOP_SIGKILL:
2068                                 if (main_pid_good(s) <= 0)
2069                                         service_enter_stop_post(s, success);
2070
2071                                 /* If there is still a service
2072                                  * process around, wait until
2073                                  * that one quit, too */
2074                                 break;
2075
2076                         case SERVICE_STOP_POST:
2077                         case SERVICE_FINAL_SIGTERM:
2078                         case SERVICE_FINAL_SIGKILL:
2079                                 service_enter_dead(s, success, true);
2080                                 break;
2081
2082                         default:
2083                                 assert_not_reached("Uh, control process died at wrong time.");
2084                         }
2085                 }
2086         } else
2087                 assert_not_reached("Got SIGCHLD for unkown PID");
2088 }
2089
2090 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2091         Service *s = SERVICE(u);
2092
2093         assert(s);
2094         assert(elapsed == 1);
2095
2096         assert(w == &s->timer_watch);
2097
2098         switch (s->state) {
2099
2100         case SERVICE_START_PRE:
2101         case SERVICE_START:
2102                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2103                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2104                 break;
2105
2106         case SERVICE_START_POST:
2107         case SERVICE_RELOAD:
2108                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2109                 service_enter_stop(s, false);
2110                 break;
2111
2112         case SERVICE_STOP:
2113                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2114                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2115                 break;
2116
2117         case SERVICE_STOP_SIGTERM:
2118                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2119                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2120                 break;
2121
2122         case SERVICE_STOP_SIGKILL:
2123                 /* Uh, wie sent a SIGKILL and it is still not gone?
2124                  * Must be something we cannot kill, so let's just be
2125                  * weirded out and continue */
2126
2127                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2128                 service_enter_stop_post(s, false);
2129                 break;
2130
2131         case SERVICE_STOP_POST:
2132                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2133                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2134                 break;
2135
2136         case SERVICE_FINAL_SIGTERM:
2137                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2138                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2139                 break;
2140
2141         case SERVICE_FINAL_SIGKILL:
2142                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
2143                 service_enter_dead(s, false, true);
2144                 break;
2145
2146         case SERVICE_AUTO_RESTART:
2147                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2148                 service_enter_restart(s);
2149                 break;
2150
2151         default:
2152                 assert_not_reached("Timeout at wrong time.");
2153         }
2154 }
2155
2156 static void service_cgroup_notify_event(Unit *u) {
2157         Service *s = SERVICE(u);
2158
2159         assert(u);
2160
2161         log_debug("%s: cgroup is empty", u->meta.id);
2162
2163         switch (s->state) {
2164
2165                 /* Waiting for SIGCHLD is usually more interesting,
2166                  * because it includes return codes/signals. Which is
2167                  * why we ignore the cgroup events for most cases,
2168                  * except when we don't know pid which to expect the
2169                  * SIGCHLD for. */
2170
2171         case SERVICE_RUNNING:
2172                 service_enter_running(s, true);
2173                 break;
2174
2175         default:
2176                 ;
2177         }
2178 }
2179
2180 static int service_enumerate(Manager *m) {
2181         char **p;
2182         unsigned i;
2183         DIR *d = NULL;
2184         char *path = NULL, *fpath = NULL, *name = NULL;
2185         int r;
2186
2187         assert(m);
2188
2189         STRV_FOREACH(p, m->sysvrcnd_path)
2190                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2191                         struct dirent *de;
2192
2193                         free(path);
2194                         path = NULL;
2195                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2196                                 r = -ENOMEM;
2197                                 goto finish;
2198                         }
2199
2200                         if (d)
2201                                 closedir(d);
2202
2203                         if (!(d = opendir(path))) {
2204                                 if (errno != ENOENT)
2205                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2206
2207                                 continue;
2208                         }
2209
2210                         while ((de = readdir(d))) {
2211                                 Unit *service;
2212
2213                                 if (ignore_file(de->d_name))
2214                                         continue;
2215
2216                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2217                                         continue;
2218
2219                                 if (strlen(de->d_name) < 4)
2220                                         continue;
2221
2222                                 free(fpath);
2223                                 fpath = NULL;
2224                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2225                                         r = -ENOMEM;
2226                                         goto finish;
2227                                 }
2228
2229                                 if (access(fpath, X_OK) < 0) {
2230
2231                                         if (errno != ENOENT)
2232                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2233
2234                                         continue;
2235                                 }
2236
2237                                 free(name);
2238                                 name = NULL;
2239                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
2240                                         r = -ENOMEM;
2241                                         goto finish;
2242                                 }
2243
2244                                 if ((r = manager_load_unit(m, name, NULL, &service)) < 0)
2245                                         goto finish;
2246
2247                                 if (de->d_name[0] == 'S') {
2248                                         Unit *runlevel_target;
2249
2250                                         if ((r = manager_load_unit(m, rcnd_table[i+1], NULL, &runlevel_target)) < 0)
2251                                                 goto finish;
2252
2253                                         if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2254                                                 goto finish;
2255
2256                                         if ((r = unit_add_dependency(runlevel_target, UNIT_AFTER, service, true)) < 0)
2257                                                 goto finish;
2258
2259                                 } else if (de->d_name[0] == 'K' &&
2260                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
2261                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
2262
2263                                         Unit *shutdown_target;
2264
2265                                         /* We honour K links only for
2266                                          * halt/reboot. For the normal
2267                                          * runlevels we assume the
2268                                          * stop jobs will be
2269                                          * implicitly added by the
2270                                          * core logic. Also, we don't
2271                                          * really distuingish here
2272                                          * between the runlevels 0 and
2273                                          * 6 and just add them to the
2274                                          * special shutdown target. */
2275
2276                                         if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2277                                                 goto finish;
2278
2279                                         if ((r = unit_add_dependency(shutdown_target, UNIT_CONFLICTS, service, true)) < 0)
2280                                                 goto finish;
2281
2282                                         if ((r = unit_add_dependency(shutdown_target, UNIT_BEFORE, service, true)) < 0)
2283                                                 goto finish;
2284                                 }
2285                         }
2286                 }
2287
2288         r = 0;
2289
2290 finish:
2291         free(path);
2292         free(fpath);
2293         free(name);
2294         closedir(d);
2295
2296         return r;
2297 }
2298
2299 static void service_bus_name_owner_change(
2300                 Unit *u,
2301                 const char *name,
2302                 const char *old_owner,
2303                 const char *new_owner) {
2304
2305         Service *s = SERVICE(u);
2306
2307         assert(s);
2308         assert(name);
2309
2310         assert(streq(s->bus_name, name));
2311         assert(old_owner || new_owner);
2312
2313         if (old_owner && new_owner)
2314                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2315         else if (old_owner)
2316                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2317         else
2318                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2319
2320         s->bus_name_good = !!new_owner;
2321
2322         if (s->type == SERVICE_DBUS) {
2323
2324                 /* service_enter_running() will figure out what to
2325                  * do */
2326                 if (s->state == SERVICE_RUNNING)
2327                         service_enter_running(s, true);
2328                 else if (s->state == SERVICE_START && new_owner)
2329                         service_enter_start_post(s);
2330
2331         } else if (new_owner &&
2332                    s->main_pid <= 0 &&
2333                    (s->state == SERVICE_START ||
2334                     s->state == SERVICE_START_POST ||
2335                     s->state == SERVICE_RUNNING ||
2336                     s->state == SERVICE_RELOAD)) {
2337
2338                 /* Try to acquire PID from bus service */
2339                 log_debug("Trying to acquire PID from D-Bus name...");
2340
2341                 bus_query_pid(u->meta.manager, name);
2342         }
2343 }
2344
2345 static void service_bus_query_pid_done(
2346                 Unit *u,
2347                 const char *name,
2348                 pid_t pid) {
2349
2350         Service *s = SERVICE(u);
2351
2352         assert(s);
2353         assert(name);
2354
2355         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2356
2357         if (s->main_pid <= 0 &&
2358             (s->state == SERVICE_START ||
2359              s->state == SERVICE_START_POST ||
2360              s->state == SERVICE_RUNNING ||
2361              s->state == SERVICE_RELOAD))
2362                 s->main_pid = pid;
2363 }
2364
2365 int service_set_socket_fd(Service *s, int fd) {
2366         assert(s);
2367         assert(fd >= 0);
2368
2369         /* This is called by the socket code when instantiating a new
2370          * service for a stream socket and the socket needs to be
2371          * configured. */
2372
2373         if (UNIT(s)->meta.load_state != UNIT_LOADED)
2374                 return -EINVAL;
2375
2376         if (s->socket_fd >= 0)
2377                 return -EBUSY;
2378
2379         if (s->state != SERVICE_DEAD)
2380                 return -EAGAIN;
2381
2382         s->socket_fd = fd;
2383         s->got_socket_fd = true;
2384         return 0;
2385 }
2386
2387 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2388         [SERVICE_DEAD] = "dead",
2389         [SERVICE_START_PRE] = "start-pre",
2390         [SERVICE_START] = "start",
2391         [SERVICE_START_POST] = "start-post",
2392         [SERVICE_RUNNING] = "running",
2393         [SERVICE_EXITED] = "exited",
2394         [SERVICE_RELOAD] = "reload",
2395         [SERVICE_STOP] = "stop",
2396         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2397         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2398         [SERVICE_STOP_POST] = "stop-post",
2399         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2400         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2401         [SERVICE_MAINTAINANCE] = "maintainance",
2402         [SERVICE_AUTO_RESTART] = "auto-restart",
2403 };
2404
2405 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2406
2407 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2408         [SERVICE_ONCE] = "once",
2409         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2410         [SERVICE_RESTART_ALWAYS] = "restart-always",
2411 };
2412
2413 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2414
2415 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2416         [SERVICE_FORKING] = "forking",
2417         [SERVICE_SIMPLE] = "simple",
2418         [SERVICE_FINISH] = "finish",
2419         [SERVICE_DBUS] = "dbus"
2420 };
2421
2422 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2423
2424 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2425         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2426         [SERVICE_EXEC_START] = "ExecStart",
2427         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2428         [SERVICE_EXEC_RELOAD] = "ExecReload",
2429         [SERVICE_EXEC_STOP] = "ExecStop",
2430         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2431 };
2432
2433 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2434
2435 const UnitVTable service_vtable = {
2436         .suffix = ".service",
2437
2438         .init = service_init,
2439         .done = service_done,
2440         .load = service_load,
2441
2442         .coldplug = service_coldplug,
2443
2444         .dump = service_dump,
2445
2446         .start = service_start,
2447         .stop = service_stop,
2448         .reload = service_reload,
2449
2450         .can_reload = service_can_reload,
2451
2452         .serialize = service_serialize,
2453         .deserialize_item = service_deserialize_item,
2454
2455         .active_state = service_active_state,
2456         .sub_state_to_string = service_sub_state_to_string,
2457
2458         .check_gc = service_check_gc,
2459         .check_snapshot = service_check_snapshot,
2460
2461         .sigchld_event = service_sigchld_event,
2462         .timer_event = service_timer_event,
2463
2464         .cgroup_notify_empty = service_cgroup_notify_event,
2465
2466         .bus_name_owner_change = service_bus_name_owner_change,
2467         .bus_query_pid_done = service_bus_query_pid_done,
2468
2469         .bus_message_handler = bus_service_message_handler,
2470
2471         .enumerate = service_enumerate
2472 };