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                         if ((r = unit_watch_timer(UNIT(s),
1098                                                   s->deserialized_state == SERVICE_AUTO_RESTART ?
1099                                                   s->restart_usec :
1100                                                   s->timeout_usec,
1101                                                   &s->timer_watch)) < 0)
1102                                 return r;
1103
1104                 if ((s->deserialized_state == SERVICE_START &&
1105                      (s->type == SERVICE_FORKING ||
1106                       s->type == SERVICE_DBUS)) ||
1107                     s->deserialized_state == SERVICE_START_POST ||
1108                     s->deserialized_state == SERVICE_RUNNING ||
1109                     s->deserialized_state == SERVICE_RELOAD ||
1110                     s->deserialized_state == SERVICE_STOP ||
1111                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1112                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1113                         if (s->main_pid > 0)
1114                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1115                                         return r;
1116
1117                 if (s->deserialized_state == SERVICE_START_PRE ||
1118                     s->deserialized_state == SERVICE_START ||
1119                     s->deserialized_state == SERVICE_START_POST ||
1120                     s->deserialized_state == SERVICE_RELOAD ||
1121                     s->deserialized_state == SERVICE_STOP ||
1122                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1123                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1124                     s->deserialized_state == SERVICE_STOP_POST ||
1125                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1126                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1127                         if (s->control_pid > 0)
1128                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1129                                         return r;
1130
1131                 service_set_state(s, s->deserialized_state);
1132         }
1133
1134         return 0;
1135 }
1136
1137 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1138         Iterator i;
1139         int r;
1140         int *rfds = NULL;
1141         unsigned rn_fds = 0;
1142         Set *set;
1143         Socket *sock;
1144
1145         assert(s);
1146         assert(fds);
1147         assert(n_fds);
1148
1149         if ((r = service_get_sockets(s, &set)) < 0)
1150                 return r;
1151
1152         SET_FOREACH(sock, set, i) {
1153                 int *cfds;
1154                 unsigned cn_fds;
1155
1156                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1157                         goto fail;
1158
1159                 if (!cfds)
1160                         continue;
1161
1162                 if (!rfds) {
1163                         rfds = cfds;
1164                         rn_fds = cn_fds;
1165                 } else {
1166                         int *t;
1167
1168                         if (!(t = new(int, rn_fds+cn_fds))) {
1169                                 free(cfds);
1170                                 r = -ENOMEM;
1171                                 goto fail;
1172                         }
1173
1174                         memcpy(t, rfds, rn_fds);
1175                         memcpy(t+rn_fds, cfds, cn_fds);
1176                         free(rfds);
1177                         free(cfds);
1178
1179                         rfds = t;
1180                         rn_fds = rn_fds+cn_fds;
1181                 }
1182         }
1183
1184         *fds = rfds;
1185         *n_fds = rn_fds;
1186
1187         set_free(set);
1188
1189         return 0;
1190
1191 fail:
1192         set_free(set);
1193         free(rfds);
1194
1195         return r;
1196 }
1197
1198 static int service_spawn(
1199                 Service *s,
1200                 ExecCommand *c,
1201                 bool timeout,
1202                 bool pass_fds,
1203                 bool apply_permissions,
1204                 bool apply_chroot,
1205                 pid_t *_pid) {
1206
1207         pid_t pid;
1208         int r;
1209         int *fds = NULL;
1210         unsigned n_fds = 0;
1211         char **argv;
1212
1213         assert(s);
1214         assert(c);
1215         assert(_pid);
1216
1217         if (pass_fds) {
1218                 if (s->socket_fd >= 0) {
1219                         fds = &s->socket_fd;
1220                         n_fds = 1;
1221                 } else if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1222                         goto fail;
1223         }
1224
1225         if (timeout) {
1226                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1227                         goto fail;
1228         } else
1229                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1230
1231         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1232                 r = -ENOMEM;
1233                 goto fail;
1234         }
1235
1236         r = exec_spawn(c,
1237                        argv,
1238                        &s->exec_context,
1239                        fds, n_fds,
1240                        apply_permissions,
1241                        apply_chroot,
1242                        UNIT(s)->meta.manager->confirm_spawn,
1243                        UNIT(s)->meta.cgroup_bondings,
1244                        &pid);
1245
1246         strv_free(argv);
1247         if (r < 0)
1248                 goto fail;
1249
1250         if (fds) {
1251                 if (s->socket_fd >= 0)
1252                         service_close_socket_fd(s);
1253                 else
1254                         free(fds);
1255         }
1256
1257         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1258                 /* FIXME: we need to do something here */
1259                 goto fail;
1260
1261         *_pid = pid;
1262
1263         return 0;
1264
1265 fail:
1266         free(fds);
1267
1268         if (timeout)
1269                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1270
1271         return r;
1272 }
1273
1274 static int main_pid_good(Service *s) {
1275         assert(s);
1276
1277         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1278          * don't know */
1279
1280         /* If we know the pid file, then lets just check if it is
1281          * still valid */
1282         if (s->main_pid_known)
1283                 return s->main_pid > 0;
1284
1285         /* We don't know the pid */
1286         return -EAGAIN;
1287 }
1288
1289 static int control_pid_good(Service *s) {
1290         assert(s);
1291
1292         return s->control_pid > 0;
1293 }
1294
1295 static int cgroup_good(Service *s) {
1296         int r;
1297
1298         assert(s);
1299
1300         if (s->valid_no_process)
1301                 return -EAGAIN;
1302
1303         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1304                 return r;
1305
1306         return !r;
1307 }
1308
1309 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1310         int r;
1311         assert(s);
1312
1313         if (!success)
1314                 s->failure = true;
1315
1316         if (allow_restart &&
1317             (s->restart == SERVICE_RESTART_ALWAYS ||
1318              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1319
1320                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1321                         goto fail;
1322
1323                 service_set_state(s, SERVICE_AUTO_RESTART);
1324         } else
1325                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1326
1327         return;
1328
1329 fail:
1330         log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1331         service_enter_dead(s, false, false);
1332 }
1333
1334 static void service_enter_signal(Service *s, ServiceState state, bool success);
1335
1336 static void service_enter_stop_post(Service *s, bool success) {
1337         int r;
1338         assert(s);
1339
1340         if (!success)
1341                 s->failure = true;
1342
1343         service_unwatch_control_pid(s);
1344
1345         s->control_command_id = SERVICE_EXEC_STOP_POST;
1346         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1347                 if ((r = service_spawn(s,
1348                                        s->control_command,
1349                                        true,
1350                                        false,
1351                                        !s->permissions_start_only,
1352                                        !s->root_directory_start_only,
1353                                        &s->control_pid)) < 0)
1354                         goto fail;
1355
1356
1357                 service_set_state(s, SERVICE_STOP_POST);
1358         } else
1359                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1360
1361         return;
1362
1363 fail:
1364         log_warning("%s failed to run stop-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1365         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1366 }
1367
1368 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1369         int r;
1370         bool sent = false;
1371
1372         assert(s);
1373
1374         if (!success)
1375                 s->failure = true;
1376
1377         if (s->kill_mode != KILL_NONE) {
1378                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1379
1380                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1381
1382                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1383                                 if (r != -EAGAIN && r != -ESRCH)
1384                                         goto fail;
1385                         } else
1386                                 sent = true;
1387                 }
1388
1389                 if (!sent) {
1390                         r = 0;
1391
1392                         if (s->main_pid > 0) {
1393                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1394                                         r = -errno;
1395                                 else
1396                                         sent = true;
1397                         }
1398
1399                         if (s->control_pid > 0) {
1400                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1401                                         r = -errno;
1402                                 else
1403                                         sent = true;
1404                         }
1405
1406                         if (r < 0)
1407                                 goto fail;
1408                 }
1409         }
1410
1411         if (sent) {
1412                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1413                         goto fail;
1414
1415                 service_set_state(s, state);
1416         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1417                 service_enter_stop_post(s, true);
1418         else
1419                 service_enter_dead(s, true, true);
1420
1421         return;
1422
1423 fail:
1424         log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1425
1426         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1427                 service_enter_stop_post(s, false);
1428         else
1429                 service_enter_dead(s, false, true);
1430 }
1431
1432 static void service_enter_stop(Service *s, bool success) {
1433         int r;
1434         assert(s);
1435
1436         if (!success)
1437                 s->failure = true;
1438
1439         service_unwatch_control_pid(s);
1440
1441         s->control_command_id = SERVICE_EXEC_STOP;
1442         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1443                 if ((r = service_spawn(s,
1444                                        s->control_command,
1445                                        true,
1446                                        false,
1447                                        !s->permissions_start_only,
1448                                        !s->root_directory_start_only,
1449                                        &s->control_pid)) < 0)
1450                         goto fail;
1451
1452                 service_set_state(s, SERVICE_STOP);
1453         } else
1454                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1455
1456         return;
1457
1458 fail:
1459         log_warning("%s failed to run stop executable: %s", UNIT(s)->meta.id, strerror(-r));
1460         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1461 }
1462
1463 static void service_enter_running(Service *s, bool success) {
1464         assert(s);
1465
1466         if (!success)
1467                 s->failure = true;
1468
1469         if (main_pid_good(s) != 0 &&
1470             cgroup_good(s) != 0 &&
1471             (s->bus_name_good || s->type != SERVICE_DBUS))
1472                 service_set_state(s, SERVICE_RUNNING);
1473         else if (s->valid_no_process)
1474                 service_set_state(s, SERVICE_EXITED);
1475         else
1476                 service_enter_stop(s, true);
1477 }
1478
1479 static void service_enter_start_post(Service *s) {
1480         int r;
1481         assert(s);
1482
1483         service_unwatch_control_pid(s);
1484
1485         s->control_command_id = SERVICE_EXEC_START_POST;
1486         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1487                 if ((r = service_spawn(s,
1488                                        s->control_command,
1489                                        true,
1490                                        false,
1491                                        !s->permissions_start_only,
1492                                        !s->root_directory_start_only,
1493                                        &s->control_pid)) < 0)
1494                         goto fail;
1495
1496
1497                 service_set_state(s, SERVICE_START_POST);
1498         } else
1499                 service_enter_running(s, true);
1500
1501         return;
1502
1503 fail:
1504         log_warning("%s failed to run start-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1505         service_enter_stop(s, false);
1506 }
1507
1508 static void service_enter_start(Service *s) {
1509         pid_t pid;
1510         int r;
1511
1512         assert(s);
1513
1514         assert(s->exec_command[SERVICE_EXEC_START]);
1515         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1516
1517         if (s->type == SERVICE_FORKING)
1518                 service_unwatch_control_pid(s);
1519         else
1520                 service_unwatch_main_pid(s);
1521
1522         if ((r = service_spawn(s,
1523                                s->exec_command[SERVICE_EXEC_START],
1524                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS,
1525                                true,
1526                                true,
1527                                true,
1528                                &pid)) < 0)
1529                 goto fail;
1530
1531         if (s->type == SERVICE_SIMPLE) {
1532                 /* For simple services we immediately start
1533                  * the START_POST binaries. */
1534
1535                 s->main_pid = pid;
1536                 s->main_pid_known = true;
1537
1538                 service_enter_start_post(s);
1539
1540         } else  if (s->type == SERVICE_FORKING) {
1541
1542                 /* For forking services we wait until the start
1543                  * process exited. */
1544
1545                 s->control_pid = pid;
1546
1547                 s->control_command_id = SERVICE_EXEC_START;
1548                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1549                 service_set_state(s, SERVICE_START);
1550
1551         } else if (s->type == SERVICE_FINISH ||
1552                    s->type == SERVICE_DBUS) {
1553
1554                 /* For finishing services we wait until the start
1555                  * process exited, too, but it is our main process. */
1556
1557                 /* For D-Bus services we know the main pid right away,
1558                  * but wait for the bus name to appear on the bus. */
1559
1560                 s->main_pid = pid;
1561                 s->main_pid_known = true;
1562
1563                 service_set_state(s, SERVICE_START);
1564         } else
1565                 assert_not_reached("Unknown service type");
1566
1567         return;
1568
1569 fail:
1570         log_warning("%s failed to run start exectuable: %s", UNIT(s)->meta.id, strerror(-r));
1571         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1572 }
1573
1574 static void service_enter_start_pre(Service *s) {
1575         int r;
1576
1577         assert(s);
1578
1579         service_unwatch_control_pid(s);
1580
1581         s->control_command_id = SERVICE_EXEC_START_PRE;
1582         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1583                 if ((r = service_spawn(s,
1584                                        s->control_command,
1585                                        true,
1586                                        false,
1587                                        !s->permissions_start_only,
1588                                        !s->root_directory_start_only,
1589                                        &s->control_pid)) < 0)
1590                         goto fail;
1591
1592                 service_set_state(s, SERVICE_START_PRE);
1593         } else
1594                 service_enter_start(s);
1595
1596         return;
1597
1598 fail:
1599         log_warning("%s failed to run start-pre executable: %s", UNIT(s)->meta.id, strerror(-r));
1600         service_enter_dead(s, false, true);
1601 }
1602
1603 static void service_enter_restart(Service *s) {
1604         int r;
1605         assert(s);
1606
1607         service_enter_dead(s, true, false);
1608
1609         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1610                 goto fail;
1611
1612         log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1613         return;
1614
1615 fail:
1616
1617         log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1618         service_enter_dead(s, false, false);
1619 }
1620
1621 static void service_enter_reload(Service *s) {
1622         int r;
1623
1624         assert(s);
1625
1626         service_unwatch_control_pid(s);
1627
1628         s->control_command_id = SERVICE_EXEC_RELOAD;
1629         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1630                 if ((r = service_spawn(s,
1631                                        s->control_command,
1632                                        true,
1633                                        false,
1634                                        !s->permissions_start_only,
1635                                        !s->root_directory_start_only,
1636                                        &s->control_pid)) < 0)
1637                         goto fail;
1638
1639                 service_set_state(s, SERVICE_RELOAD);
1640         } else
1641                 service_enter_running(s, true);
1642
1643         return;
1644
1645 fail:
1646         log_warning("%s failed to run reload executable: %s", UNIT(s)->meta.id, strerror(-r));
1647         service_enter_stop(s, false);
1648 }
1649
1650 static void service_run_next(Service *s, bool success) {
1651         int r;
1652
1653         assert(s);
1654         assert(s->control_command);
1655         assert(s->control_command->command_next);
1656
1657         if (!success)
1658                 s->failure = true;
1659
1660         s->control_command = s->control_command->command_next;
1661
1662         service_unwatch_control_pid(s);
1663
1664         if ((r = service_spawn(s,
1665                                s->control_command,
1666                                true,
1667                                false,
1668                                !s->permissions_start_only,
1669                                !s->root_directory_start_only,
1670                                &s->control_pid)) < 0)
1671                 goto fail;
1672
1673         return;
1674
1675 fail:
1676         log_warning("%s failed to run spawn next executable: %s", UNIT(s)->meta.id, strerror(-r));
1677
1678         if (s->state == SERVICE_START_PRE)
1679                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1680         else if (s->state == SERVICE_STOP)
1681                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1682         else if (s->state == SERVICE_STOP_POST)
1683                 service_enter_dead(s, false, true);
1684         else
1685                 service_enter_stop(s, false);
1686 }
1687
1688 static int service_start(Unit *u) {
1689         Service *s = SERVICE(u);
1690
1691         assert(s);
1692
1693         /* We cannot fulfill this request right now, try again later
1694          * please! */
1695         if (s->state == SERVICE_STOP ||
1696             s->state == SERVICE_STOP_SIGTERM ||
1697             s->state == SERVICE_STOP_SIGKILL ||
1698             s->state == SERVICE_STOP_POST ||
1699             s->state == SERVICE_FINAL_SIGTERM ||
1700             s->state == SERVICE_FINAL_SIGKILL)
1701                 return -EAGAIN;
1702
1703         /* Already on it! */
1704         if (s->state == SERVICE_START_PRE ||
1705             s->state == SERVICE_START ||
1706             s->state == SERVICE_START_POST)
1707                 return 0;
1708
1709         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1710
1711         /* Make sure we don't enter a busy loop of some kind. */
1712         if (!ratelimit_test(&s->ratelimit)) {
1713                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1714                 return -EAGAIN;
1715         }
1716
1717         s->failure = false;
1718         s->main_pid_known = false;
1719
1720         service_enter_start_pre(s);
1721         return 0;
1722 }
1723
1724 static int service_stop(Unit *u) {
1725         Service *s = SERVICE(u);
1726
1727         assert(s);
1728
1729         /* Cannot do this now */
1730         if (s->state == SERVICE_START_PRE ||
1731             s->state == SERVICE_START ||
1732             s->state == SERVICE_START_POST ||
1733             s->state == SERVICE_RELOAD)
1734                 return -EAGAIN;
1735
1736         /* Already on it */
1737         if (s->state == SERVICE_STOP ||
1738             s->state == SERVICE_STOP_SIGTERM ||
1739             s->state == SERVICE_STOP_SIGKILL ||
1740             s->state == SERVICE_STOP_POST ||
1741             s->state == SERVICE_FINAL_SIGTERM ||
1742             s->state == SERVICE_FINAL_SIGKILL)
1743                 return 0;
1744
1745         if (s->state == SERVICE_AUTO_RESTART) {
1746                 service_set_state(s, SERVICE_DEAD);
1747                 return 0;
1748         }
1749
1750         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1751
1752         service_enter_stop(s, true);
1753         return 0;
1754 }
1755
1756 static int service_reload(Unit *u) {
1757         Service *s = SERVICE(u);
1758
1759         assert(s);
1760
1761         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1762
1763         service_enter_reload(s);
1764         return 0;
1765 }
1766
1767 static bool service_can_reload(Unit *u) {
1768         Service *s = SERVICE(u);
1769
1770         assert(s);
1771
1772         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1773 }
1774
1775 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1776         Service *s = SERVICE(u);
1777
1778         assert(u);
1779         assert(f);
1780         assert(fds);
1781
1782         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1783         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1784
1785         if (s->control_pid > 0)
1786                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) (s->control_pid));
1787
1788         if (s->main_pid > 0)
1789                 unit_serialize_item_format(u, f, "main-pid", "%u", (unsigned) (s->main_pid));
1790
1791         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1792
1793         /* There's a minor uncleanliness here: if there are multiple
1794          * commands attached here, we will start from the first one
1795          * again */
1796         if (s->control_command_id >= 0)
1797                 unit_serialize_item(u, f, "control-command", mount_exec_command_to_string(s->control_command_id));
1798
1799         if (s->socket_fd >= 0) {
1800                 int copy;
1801
1802                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1803                         return copy;
1804
1805                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1806         }
1807
1808         return 0;
1809 }
1810
1811 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1812         Service *s = SERVICE(u);
1813         int r;
1814
1815         assert(u);
1816         assert(key);
1817         assert(value);
1818         assert(fds);
1819
1820         if (streq(key, "state")) {
1821                 ServiceState state;
1822
1823                 if ((state = service_state_from_string(value)) < 0)
1824                         log_debug("Failed to parse state value %s", value);
1825                 else
1826                         s->deserialized_state = state;
1827         } else if (streq(key, "failure")) {
1828                 int b;
1829
1830                 if ((b = parse_boolean(value)) < 0)
1831                         log_debug("Failed to parse failure value %s", value);
1832                 else
1833                         s->failure = b || s->failure;
1834         } else if (streq(key, "control-pid")) {
1835                 unsigned pid;
1836
1837                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1838                         log_debug("Failed to parse control-pid value %s", value);
1839                 else
1840                         s->control_pid = (pid_t) pid;
1841         } else if (streq(key, "main-pid")) {
1842                 unsigned pid;
1843
1844                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1845                         log_debug("Failed to parse main-pid value %s", value);
1846                 else
1847                         s->main_pid = (pid_t) pid;
1848         } else if (streq(key, "main-pid-known")) {
1849                 int b;
1850
1851                 if ((b = parse_boolean(value)) < 0)
1852                         log_debug("Failed to parse main-pid-known value %s", value);
1853                 else
1854                         s->main_pid_known = b;
1855         } else if (streq(key, "control-command")) {
1856                 ServiceExecCommand id;
1857
1858                 if ((id = service_exec_command_from_string(value)) < 0)
1859                         log_debug("Failed to parse exec-command value %s", value);
1860                 else {
1861                         s->control_command_id = id;
1862                         s->control_command = s->exec_command[id];
1863                 }
1864         } else if (streq(key, "socket-fd")) {
1865                 int fd;
1866
1867                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1868                         log_debug("Failed to parse socket-fd value %s", value);
1869                 else {
1870
1871                         if (s->socket_fd >= 0)
1872                                 close_nointr_nofail(s->socket_fd);
1873                         s->socket_fd = fdset_remove(fds, fd);
1874                 }
1875         } else
1876                 log_debug("Unknown serialization key '%s'", key);
1877
1878         return 0;
1879 }
1880
1881 static UnitActiveState service_active_state(Unit *u) {
1882         assert(u);
1883
1884         return state_translation_table[SERVICE(u)->state];
1885 }
1886
1887 static const char *service_sub_state_to_string(Unit *u) {
1888         assert(u);
1889
1890         return service_state_to_string(SERVICE(u)->state);
1891 }
1892
1893 static bool service_check_gc(Unit *u) {
1894         Service *s = SERVICE(u);
1895
1896         assert(s);
1897
1898         return !!s->sysv_path;
1899 }
1900
1901 static bool service_check_snapshot(Unit *u) {
1902         Service *s = SERVICE(u);
1903
1904         assert(s);
1905
1906         return !s->got_socket_fd;
1907 }
1908
1909 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1910         Service *s = SERVICE(u);
1911         bool success;
1912
1913         assert(s);
1914         assert(pid >= 0);
1915
1916         success = code == CLD_EXITED && status == 0;
1917         s->failure = s->failure || !success;
1918
1919         if (s->main_pid == pid) {
1920
1921                 exec_status_fill(&s->main_exec_status, pid, code, status);
1922                 s->main_pid = 0;
1923
1924                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1925                         assert(s->exec_command[SERVICE_EXEC_START]);
1926                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1927                 }
1928
1929                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
1930
1931                 /* The service exited, so the service is officially
1932                  * gone. */
1933
1934                 switch (s->state) {
1935
1936                 case SERVICE_START_POST:
1937                 case SERVICE_RELOAD:
1938                 case SERVICE_STOP:
1939                         /* Need to wait until the operation is
1940                          * done */
1941                         break;
1942
1943                 case SERVICE_START:
1944                         assert(s->type == SERVICE_FINISH);
1945
1946                         /* This was our main goal, so let's go on */
1947                         if (success)
1948                                 service_enter_start_post(s);
1949                         else
1950                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1951                         break;
1952
1953                 case SERVICE_RUNNING:
1954                         service_enter_running(s, success);
1955                         break;
1956
1957                 case SERVICE_STOP_SIGTERM:
1958                 case SERVICE_STOP_SIGKILL:
1959
1960                         if (!control_pid_good(s))
1961                                 service_enter_stop_post(s, success);
1962
1963                         /* If there is still a control process, wait for that first */
1964                         break;
1965
1966                 default:
1967                         assert_not_reached("Uh, main process died at wrong time.");
1968                 }
1969
1970         } else if (s->control_pid == pid) {
1971
1972                 if (s->control_command)
1973                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
1974
1975                 s->control_pid = 0;
1976
1977                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1978
1979                 /* If we are shutting things down anyway we
1980                  * don't care about failing commands. */
1981
1982                 if (s->control_command && s->control_command->command_next && success) {
1983
1984                         /* There is another command to *
1985                          * execute, so let's do that. */
1986
1987                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
1988                         service_run_next(s, success);
1989
1990                 } else {
1991                         /* No further commands for this step, so let's
1992                          * figure out what to do next */
1993
1994                         s->control_command = NULL;
1995                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1996
1997                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
1998
1999                         switch (s->state) {
2000
2001                         case SERVICE_START_PRE:
2002                                 if (success)
2003                                         service_enter_start(s);
2004                                 else
2005                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2006                                 break;
2007
2008                         case SERVICE_START:
2009                                 assert(s->type == SERVICE_FORKING);
2010
2011                                 /* Let's try to load the pid
2012                                  * file here if we can. We
2013                                  * ignore the return value,
2014                                  * since the PID file might
2015                                  * actually be created by a
2016                                  * START_POST script */
2017
2018                                 if (success) {
2019                                         if (s->pid_file)
2020                                                 service_load_pid_file(s);
2021
2022                                         service_enter_start_post(s);
2023                                 } else
2024                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2025
2026                                 break;
2027
2028                         case SERVICE_START_POST:
2029                                 if (success && s->pid_file && !s->main_pid_known) {
2030                                         int r;
2031
2032                                         /* Hmm, let's see if we can
2033                                          * load the pid now after the
2034                                          * start-post scripts got
2035                                          * executed. */
2036
2037                                         if ((r = service_load_pid_file(s)) < 0)
2038                                                 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
2039                                 }
2040
2041                                 /* Fall through */
2042
2043                         case SERVICE_RELOAD:
2044                                 if (success)
2045                                         service_enter_running(s, true);
2046                                 else
2047                                         service_enter_stop(s, false);
2048
2049                                 break;
2050
2051                         case SERVICE_STOP:
2052                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2053                                 break;
2054
2055                         case SERVICE_STOP_SIGTERM:
2056                         case SERVICE_STOP_SIGKILL:
2057                                 if (main_pid_good(s) <= 0)
2058                                         service_enter_stop_post(s, success);
2059
2060                                 /* If there is still a service
2061                                  * process around, wait until
2062                                  * that one quit, too */
2063                                 break;
2064
2065                         case SERVICE_STOP_POST:
2066                         case SERVICE_FINAL_SIGTERM:
2067                         case SERVICE_FINAL_SIGKILL:
2068                                 service_enter_dead(s, success, true);
2069                                 break;
2070
2071                         default:
2072                                 assert_not_reached("Uh, control process died at wrong time.");
2073                         }
2074                 }
2075         } else
2076                 assert_not_reached("Got SIGCHLD for unkown PID");
2077 }
2078
2079 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2080         Service *s = SERVICE(u);
2081
2082         assert(s);
2083         assert(elapsed == 1);
2084
2085         assert(w == &s->timer_watch);
2086
2087         switch (s->state) {
2088
2089         case SERVICE_START_PRE:
2090         case SERVICE_START:
2091                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2092                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2093                 break;
2094
2095         case SERVICE_START_POST:
2096         case SERVICE_RELOAD:
2097                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2098                 service_enter_stop(s, false);
2099                 break;
2100
2101         case SERVICE_STOP:
2102                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2103                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2104                 break;
2105
2106         case SERVICE_STOP_SIGTERM:
2107                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2108                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2109                 break;
2110
2111         case SERVICE_STOP_SIGKILL:
2112                 /* Uh, wie sent a SIGKILL and it is still not gone?
2113                  * Must be something we cannot kill, so let's just be
2114                  * weirded out and continue */
2115
2116                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2117                 service_enter_stop_post(s, false);
2118                 break;
2119
2120         case SERVICE_STOP_POST:
2121                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2122                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2123                 break;
2124
2125         case SERVICE_FINAL_SIGTERM:
2126                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2127                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2128                 break;
2129
2130         case SERVICE_FINAL_SIGKILL:
2131                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
2132                 service_enter_dead(s, false, true);
2133                 break;
2134
2135         case SERVICE_AUTO_RESTART:
2136                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2137                 service_enter_restart(s);
2138                 break;
2139
2140         default:
2141                 assert_not_reached("Timeout at wrong time.");
2142         }
2143 }
2144
2145 static void service_cgroup_notify_event(Unit *u) {
2146         Service *s = SERVICE(u);
2147
2148         assert(u);
2149
2150         log_debug("%s: cgroup is empty", u->meta.id);
2151
2152         switch (s->state) {
2153
2154                 /* Waiting for SIGCHLD is usually more interesting,
2155                  * because it includes return codes/signals. Which is
2156                  * why we ignore the cgroup events for most cases,
2157                  * except when we don't know pid which to expect the
2158                  * SIGCHLD for. */
2159
2160         case SERVICE_RUNNING:
2161                 service_enter_running(s, true);
2162                 break;
2163
2164         default:
2165                 ;
2166         }
2167 }
2168
2169 static int service_enumerate(Manager *m) {
2170         char **p;
2171         unsigned i;
2172         DIR *d = NULL;
2173         char *path = NULL, *fpath = NULL, *name = NULL;
2174         int r;
2175
2176         assert(m);
2177
2178         STRV_FOREACH(p, m->sysvrcnd_path)
2179                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2180                         struct dirent *de;
2181
2182                         free(path);
2183                         path = NULL;
2184                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2185                                 r = -ENOMEM;
2186                                 goto finish;
2187                         }
2188
2189                         if (d)
2190                                 closedir(d);
2191
2192                         if (!(d = opendir(path))) {
2193                                 if (errno != ENOENT)
2194                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2195
2196                                 continue;
2197                         }
2198
2199                         while ((de = readdir(d))) {
2200                                 Unit *runlevel, *service;
2201
2202                                 if (ignore_file(de->d_name))
2203                                         continue;
2204
2205                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2206                                         continue;
2207
2208                                 if (strlen(de->d_name) < 4)
2209                                         continue;
2210
2211                                 free(fpath);
2212                                 fpath = NULL;
2213                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2214                                         r = -ENOMEM;
2215                                         goto finish;
2216                                 }
2217
2218                                 if (access(fpath, X_OK) < 0) {
2219
2220                                         if (errno != ENOENT)
2221                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2222
2223                                         continue;
2224                                 }
2225
2226                                 free(name);
2227                                 name = NULL;
2228                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
2229                                         r = -ENOMEM;
2230                                         goto finish;
2231                                 }
2232
2233                                 if ((r = manager_load_unit(m, name, NULL, &service)) < 0)
2234                                         goto finish;
2235
2236                                 if ((r = manager_load_unit(m, rcnd_table[i+1], NULL, &runlevel)) < 0)
2237                                         goto finish;
2238
2239                                 if (de->d_name[0] == 'S') {
2240                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service, true)) < 0)
2241                                                 goto finish;
2242
2243                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service, true)) < 0)
2244                                                 goto finish;
2245
2246                                 } else if (de->d_name[0] == 'K' &&
2247                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
2248                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
2249
2250                                         /* We honour K links only for
2251                                          * halt/reboot. For the normal
2252                                          * runlevels we assume the
2253                                          * stop jobs will be
2254                                          * implicitly added by the
2255                                          * core logic. */
2256
2257                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service, true)) < 0)
2258                                                 goto finish;
2259
2260                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service, true)) < 0)
2261                                                 goto finish;
2262                                 }
2263                         }
2264                 }
2265
2266         r = 0;
2267
2268 finish:
2269         free(path);
2270         free(fpath);
2271         free(name);
2272         closedir(d);
2273
2274         return r;
2275 }
2276
2277 static void service_bus_name_owner_change(
2278                 Unit *u,
2279                 const char *name,
2280                 const char *old_owner,
2281                 const char *new_owner) {
2282
2283         Service *s = SERVICE(u);
2284
2285         assert(s);
2286         assert(name);
2287
2288         assert(streq(s->bus_name, name));
2289         assert(old_owner || new_owner);
2290
2291         if (old_owner && new_owner)
2292                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2293         else if (old_owner)
2294                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2295         else
2296                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2297
2298         s->bus_name_good = !!new_owner;
2299
2300         if (s->type == SERVICE_DBUS) {
2301
2302                 /* service_enter_running() will figure out what to
2303                  * do */
2304                 if (s->state == SERVICE_RUNNING)
2305                         service_enter_running(s, true);
2306                 else if (s->state == SERVICE_START && new_owner)
2307                         service_enter_start_post(s);
2308
2309         } else if (new_owner &&
2310                    s->main_pid <= 0 &&
2311                    (s->state == SERVICE_START ||
2312                     s->state == SERVICE_START_POST ||
2313                     s->state == SERVICE_RUNNING ||
2314                     s->state == SERVICE_RELOAD)) {
2315
2316                 /* Try to acquire PID from bus service */
2317                 log_debug("Trying to acquire PID from D-Bus name...");
2318
2319                 bus_query_pid(u->meta.manager, name);
2320         }
2321 }
2322
2323 static void service_bus_query_pid_done(
2324                 Unit *u,
2325                 const char *name,
2326                 pid_t pid) {
2327
2328         Service *s = SERVICE(u);
2329
2330         assert(s);
2331         assert(name);
2332
2333         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2334
2335         if (s->main_pid <= 0 &&
2336             (s->state == SERVICE_START ||
2337              s->state == SERVICE_START_POST ||
2338              s->state == SERVICE_RUNNING ||
2339              s->state == SERVICE_RELOAD))
2340                 s->main_pid = pid;
2341 }
2342
2343 int service_set_socket_fd(Service *s, int fd) {
2344         assert(s);
2345         assert(fd >= 0);
2346
2347         /* This is called by the socket code when instantiating a new
2348          * service for a stream socket and the socket needs to be
2349          * configured. */
2350
2351         if (UNIT(s)->meta.load_state != UNIT_LOADED)
2352                 return -EINVAL;
2353
2354         if (s->socket_fd >= 0)
2355                 return -EBUSY;
2356
2357         if (s->state != SERVICE_DEAD)
2358                 return -EAGAIN;
2359
2360         s->socket_fd = fd;
2361         s->got_socket_fd = true;
2362         return 0;
2363 }
2364
2365 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2366         [SERVICE_DEAD] = "dead",
2367         [SERVICE_START_PRE] = "start-pre",
2368         [SERVICE_START] = "start",
2369         [SERVICE_START_POST] = "start-post",
2370         [SERVICE_RUNNING] = "running",
2371         [SERVICE_EXITED] = "exited",
2372         [SERVICE_RELOAD] = "reload",
2373         [SERVICE_STOP] = "stop",
2374         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2375         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2376         [SERVICE_STOP_POST] = "stop-post",
2377         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2378         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2379         [SERVICE_MAINTAINANCE] = "maintainance",
2380         [SERVICE_AUTO_RESTART] = "auto-restart",
2381 };
2382
2383 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2384
2385 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2386         [SERVICE_ONCE] = "once",
2387         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2388         [SERVICE_RESTART_ALWAYS] = "restart-always",
2389 };
2390
2391 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2392
2393 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2394         [SERVICE_FORKING] = "forking",
2395         [SERVICE_SIMPLE] = "simple",
2396         [SERVICE_FINISH] = "finish",
2397         [SERVICE_DBUS] = "dbus"
2398 };
2399
2400 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2401
2402 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2403         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2404         [SERVICE_EXEC_START] = "ExecStart",
2405         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2406         [SERVICE_EXEC_RELOAD] = "ExecReload",
2407         [SERVICE_EXEC_STOP] = "ExecStop",
2408         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2409 };
2410
2411 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2412
2413 const UnitVTable service_vtable = {
2414         .suffix = ".service",
2415
2416         .init = service_init,
2417         .done = service_done,
2418         .load = service_load,
2419
2420         .coldplug = service_coldplug,
2421
2422         .dump = service_dump,
2423
2424         .start = service_start,
2425         .stop = service_stop,
2426         .reload = service_reload,
2427
2428         .can_reload = service_can_reload,
2429
2430         .serialize = service_serialize,
2431         .deserialize_item = service_deserialize_item,
2432
2433         .active_state = service_active_state,
2434         .sub_state_to_string = service_sub_state_to_string,
2435
2436         .check_gc = service_check_gc,
2437         .check_snapshot = service_check_snapshot,
2438
2439         .sigchld_event = service_sigchld_event,
2440         .timer_event = service_timer_event,
2441
2442         .cgroup_notify_empty = service_cgroup_notify_event,
2443
2444         .bus_name_owner_change = service_bus_name_owner_change,
2445         .bus_query_pid_done = service_bus_query_pid_done,
2446
2447         .bus_message_handler = bus_service_message_handler,
2448
2449         .enumerate = service_enumerate
2450 };