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         s->kill_mode = KILL_PROCESS_GROUP;
 665
 666         /* Don't timeout special services during boot (like fsck) */
 667         if (s->sysv_runlevels && !chars_intersect("12345", s->sysv_runlevels))
 668                 s->timeout_usec = -1;
 669
 670         u->meta.load_state = UNIT_LOADED;
 671         r = 0;
 672
 673 finish:
 674
 675         if (f)
 676                 fclose(f);
 677
 678         return r;
 679 }
 680
 681 static int service_load_sysv_name(Service *s, const char *name) {
 682         char **p;
 683
 684         assert(s);
 685         assert(name);
 686
 687         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 688                 char *path;
 689                 int r;
 690
 691                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 692                         return -ENOMEM;
 693
 694                 assert(endswith(path, ".service"));
 695                 path[strlen(path)-8] = 0;
 696
 697                 r = service_load_sysv_path(s, path);
 698                 free(path);
 699
 700                 if (r < 0)
 701                         return r;
 702
 703                 if ((UNIT(s)->meta.load_state != UNIT_STUB))
 704                         break;
 705         }
 706
 707         return 0;
 708 }
 709
 710 static int service_load_sysv(Service *s) {
 711         const char *t;
 712         Iterator i;
 713         int r;
 714
 715         assert(s);
 716
 717         /* Load service data from SysV init scripts, preferably with
 718          * LSB headers ... */
 719
 720         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 721                 return 0;
 722
 723         if ((t = UNIT(s)->meta.id))
 724                 if ((r = service_load_sysv_name(s, t)) < 0)
 725                         return r;
 726
 727         if (UNIT(s)->meta.load_state == UNIT_STUB)
 728                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 729                         if (t == UNIT(s)->meta.id)
 730                                 continue;
 731
 732                         if ((r == service_load_sysv_name(s, t)) < 0)
 733                                 return r;
 734
 735                         if (UNIT(s)->meta.load_state != UNIT_STUB)
 736                                 break;
 737                 }
 738
 739         return 0;
 740 }
 741
 742 static int service_add_bus_name(Service *s) {
 743         char *n;
 744         int r;
 745
 746         assert(s);
 747         assert(s->bus_name);
 748
 749         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 750                 return 0;
 751
 752         r = unit_merge_by_name(UNIT(s), n);
 753         free(n);
 754
 755         return r;
 756 }
 757
 758 static int service_verify(Service *s) {
 759         assert(s);
 760
 761         if (UNIT(s)->meta.load_state != UNIT_LOADED)
 762                 return 0;
 763
 764         if (!s->exec_command[SERVICE_EXEC_START]) {
 765                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->meta.id);
 766                 return -EINVAL;
 767         }
 768
 769         if (s->type == SERVICE_DBUS && !s->bus_name) {
 770                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->meta.id);
 771                 return -EINVAL;
 772         }
 773
 774         return 0;
 775 }
 776
 777 static int service_load(Unit *u) {
 778         int r;
 779         Service *s = SERVICE(u);
 780
 781         assert(s);
 782
 783         /* Load a .service file */
 784         if ((r = unit_load_fragment(u)) < 0)
 785                 return r;
 786
 787         /* Load a classic init script as a fallback, if we couldn't find anything */
 788         if (u->meta.load_state == UNIT_STUB)
 789                 if ((r = service_load_sysv(s)) < 0)
 790                         return r;
 791
 792         /* Still nothing found? Then let's give up */
 793         if (u->meta.load_state == UNIT_STUB)
 794                 return -ENOENT;
 795
 796         /* We were able to load something, then let's add in the
 797          * dropin directories. */
 798         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 799                 return r;
 800
 801         /* This is a new unit? Then let's add in some extras */
 802         if (u->meta.load_state == UNIT_LOADED) {
 803                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 804                         return r;
 805
 806                 if ((r = unit_add_default_cgroup(u)) < 0)
 807                         return r;
 808
 809                 if ((r = sysv_chkconfig_order(s)) < 0)
 810                         return r;
 811
 812                 if (s->bus_name) {
 813                         if ((r = service_add_bus_name(s)) < 0)
 814                                 return r;
 815
 816                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 817                             return r;
 818                 }
 819         }
 820
 821         return service_verify(s);
 822 }
 823
 824 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 825
 826         ServiceExecCommand c;
 827         Service *s = SERVICE(u);
 828         const char *prefix2;
 829         char *p2;
 830
 831         assert(s);
 832
 833         p2 = strappend(prefix, "\t");
 834         prefix2 = p2 ? p2 : prefix;
 835
 836         fprintf(f,
 837                 "%sService State: %s\n"
 838                 "%sPermissionsStartOnly: %s\n"
 839                 "%sRootDirectoryStartOnly: %s\n"
 840                 "%sValidNoProcess: %s\n"
 841                 "%sKillMode: %s\n"
 842                 "%sType: %s\n",
 843                 prefix, service_state_to_string(s->state),
 844                 prefix, yes_no(s->permissions_start_only),
 845                 prefix, yes_no(s->root_directory_start_only),
 846                 prefix, yes_no(s->valid_no_process),
 847                 prefix, kill_mode_to_string(s->kill_mode),
 848                 prefix, service_type_to_string(s->type));
 849
 850         if (s->control_pid > 0)
 851                 fprintf(f,
 852                         "%sControl PID: %llu\n",
 853                         prefix, (unsigned long long) s->control_pid);
 854
 855         if (s->main_pid > 0)
 856                 fprintf(f,
 857                         "%sMain PID: %llu\n",
 858                         prefix, (unsigned long long) s->main_pid);
 859
 860         if (s->pid_file)
 861                 fprintf(f,
 862                         "%sPIDFile: %s\n",
 863                         prefix, s->pid_file);
 864
 865         if (s->bus_name)
 866                 fprintf(f,
 867                         "%sBusName: %s\n"
 868                         "%sBus Name Good: %s\n",
 869                         prefix, s->bus_name,
 870                         prefix, yes_no(s->bus_name_good));
 871
 872         exec_context_dump(&s->exec_context, f, prefix);
 873
 874         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 875
 876                 if (!s->exec_command[c])
 877                         continue;
 878
 879                 fprintf(f, "%s-> %s:\n",
 880                         prefix, service_exec_command_to_string(c));
 881
 882                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 883         }
 884
 885         if (s->sysv_path)
 886                 fprintf(f,
 887                         "%sSysV Init Script Path: %s\n"
 888                         "%sSysV Init Script has LSB Header: %s\n",
 889                         prefix, s->sysv_path,
 890                         prefix, yes_no(s->sysv_has_lsb));
 891
 892         if (s->sysv_start_priority >= 0)
 893                 fprintf(f,
 894                         "%sSysVStartPriority: %i\n",
 895                         prefix, s->sysv_start_priority);
 896
 897         if (s->sysv_runlevels)
 898                 fprintf(f, "%sSysVRunLevels: %s\n",
 899                         prefix, s->sysv_runlevels);
 900
 901         free(p2);
 902 }
 903
 904 static int service_load_pid_file(Service *s) {
 905         char *k;
 906         unsigned long p;
 907         int r;
 908
 909         assert(s);
 910
 911         if (s->main_pid_known)
 912                 return 0;
 913
 914         assert(s->main_pid <= 0);
 915
 916         if (!s->pid_file)
 917                 return -ENOENT;
 918
 919         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 920                 return r;
 921
 922         if ((r = safe_atolu(k, &p)) < 0) {
 923                 free(k);
 924                 return r;
 925         }
 926
 927         if ((unsigned long) (pid_t) p != p)
 928                 return -ERANGE;
 929
 930         if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
 931                 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
 932                             (unsigned long long) p, s->pid_file);
 933                 return -ESRCH;
 934         }
 935
 936         if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
 937                 /* FIXME: we need to do something here */
 938                 return r;
 939
 940         s->main_pid = (pid_t) p;
 941         s->main_pid_known = true;
 942
 943         return 0;
 944 }
 945
 946 static int service_get_sockets(Service *s, Set **_set) {
 947         Set *set;
 948         Iterator i;
 949         char *t;
 950         int r;
 951
 952         assert(s);
 953         assert(_set);
 954
 955         /* Collects all Socket objects that belong to this
 956          * service. Note that a service might have multiple sockets
 957          * via multiple names. */
 958
 959         if (!(set = set_new(NULL, NULL)))
 960                 return -ENOMEM;
 961
 962         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 963                 char *k;
 964                 Unit *p;
 965
 966                 /* Look for all socket objects that go by any of our
 967                  * units and collect their fds */
 968
 969                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 970                         r = -ENOMEM;
 971                         goto fail;
 972                 }
 973
 974                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 975                 free(k);
 976
 977                 if (!p)
 978                         continue;
 979
 980                 if ((r = set_put(set, p)) < 0)
 981                         goto fail;
 982         }
 983
 984         *_set = set;
 985         return 0;
 986
 987 fail:
 988         set_free(set);
 989         return r;
 990 }
 991
 992 static int service_notify_sockets_dead(Service *s) {
 993         Iterator i;
 994         Set *set;
 995         Socket *sock;
 996         int r;
 997
 998         assert(s);
 999
1000         /* Notifies all our sockets when we die */
1001         if ((r = service_get_sockets(s, &set)) < 0)
1002                 return r;
1003
1004         SET_FOREACH(sock, set, i)
1005                 socket_notify_service_dead(sock);
1006
1007         set_free(set);
1008
1009         return 0;
1010 }
1011
1012 static void service_set_state(Service *s, ServiceState state) {
1013         ServiceState old_state;
1014         assert(s);
1015
1016         old_state = s->state;
1017         s->state = state;
1018
1019         if (state != SERVICE_START_PRE &&
1020             state != SERVICE_START &&
1021             state != SERVICE_START_POST &&
1022             state != SERVICE_RELOAD &&
1023             state != SERVICE_STOP &&
1024             state != SERVICE_STOP_SIGTERM &&
1025             state != SERVICE_STOP_SIGKILL &&
1026             state != SERVICE_STOP_POST &&
1027             state != SERVICE_FINAL_SIGTERM &&
1028             state != SERVICE_FINAL_SIGKILL &&
1029             state != SERVICE_AUTO_RESTART)
1030                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1031
1032         if (state != SERVICE_START &&
1033             state != SERVICE_START_POST &&
1034             state != SERVICE_RUNNING &&
1035             state != SERVICE_RELOAD &&
1036             state != SERVICE_STOP &&
1037             state != SERVICE_STOP_SIGTERM &&
1038             state != SERVICE_STOP_SIGKILL)
1039                 service_unwatch_main_pid(s);
1040
1041         if (state != SERVICE_START_PRE &&
1042             state != SERVICE_START &&
1043             state != SERVICE_START_POST &&
1044             state != SERVICE_RELOAD &&
1045             state != SERVICE_STOP &&
1046             state != SERVICE_STOP_SIGTERM &&
1047             state != SERVICE_STOP_SIGKILL &&
1048             state != SERVICE_STOP_POST &&
1049             state != SERVICE_FINAL_SIGTERM &&
1050             state != SERVICE_FINAL_SIGKILL) {
1051                 service_unwatch_control_pid(s);
1052                 s->control_command = NULL;
1053                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1054         }
1055
1056         if (state == SERVICE_DEAD ||
1057             state == SERVICE_STOP ||
1058             state == SERVICE_STOP_SIGTERM ||
1059             state == SERVICE_STOP_SIGKILL ||
1060             state == SERVICE_STOP_POST ||
1061             state == SERVICE_FINAL_SIGTERM ||
1062             state == SERVICE_FINAL_SIGKILL ||
1063             state == SERVICE_MAINTAINANCE ||
1064             state == SERVICE_AUTO_RESTART)
1065                 service_notify_sockets_dead(s);
1066
1067         if (state != SERVICE_START_PRE &&
1068             state != SERVICE_START &&
1069             !(state == SERVICE_DEAD && UNIT(s)->meta.job))
1070                 service_close_socket_fd(s);
1071
1072         if (old_state != state)
1073                 log_debug("%s changed %s -> %s", UNIT(s)->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1074
1075         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1076 }
1077
1078 static int service_coldplug(Unit *u) {
1079         Service *s = SERVICE(u);
1080         int r;
1081
1082         assert(s);
1083         assert(s->state == SERVICE_DEAD);
1084
1085         if (s->deserialized_state != s->state) {
1086
1087                 if (s->deserialized_state == SERVICE_START_PRE ||
1088                     s->deserialized_state == SERVICE_START ||
1089                     s->deserialized_state == SERVICE_START_POST ||
1090                     s->deserialized_state == SERVICE_RELOAD ||
1091                     s->deserialized_state == SERVICE_STOP ||
1092                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1093                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1094                     s->deserialized_state == SERVICE_STOP_POST ||
1095                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1096                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1097                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1098
1099                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1100                                 usec_t k;
1101
1102                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1103
1104                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1105                                         return r;
1106                         }
1107                 }
1108
1109                 if ((s->deserialized_state == SERVICE_START &&
1110                      (s->type == SERVICE_FORKING ||
1111                       s->type == SERVICE_DBUS)) ||
1112                     s->deserialized_state == SERVICE_START_POST ||
1113                     s->deserialized_state == SERVICE_RUNNING ||
1114                     s->deserialized_state == SERVICE_RELOAD ||
1115                     s->deserialized_state == SERVICE_STOP ||
1116                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1117                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1118                         if (s->main_pid > 0)
1119                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1120                                         return r;
1121
1122                 if (s->deserialized_state == SERVICE_START_PRE ||
1123                     s->deserialized_state == SERVICE_START ||
1124                     s->deserialized_state == SERVICE_START_POST ||
1125                     s->deserialized_state == SERVICE_RELOAD ||
1126                     s->deserialized_state == SERVICE_STOP ||
1127                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1128                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1129                     s->deserialized_state == SERVICE_STOP_POST ||
1130                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1131                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1132                         if (s->control_pid > 0)
1133                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1134                                         return r;
1135
1136                 service_set_state(s, s->deserialized_state);
1137         }
1138
1139         return 0;
1140 }
1141
1142 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1143         Iterator i;
1144         int r;
1145         int *rfds = NULL;
1146         unsigned rn_fds = 0;
1147         Set *set;
1148         Socket *sock;
1149
1150         assert(s);
1151         assert(fds);
1152         assert(n_fds);
1153
1154         if ((r = service_get_sockets(s, &set)) < 0)
1155                 return r;
1156
1157         SET_FOREACH(sock, set, i) {
1158                 int *cfds;
1159                 unsigned cn_fds;
1160
1161                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1162                         goto fail;
1163
1164                 if (!cfds)
1165                         continue;
1166
1167                 if (!rfds) {
1168                         rfds = cfds;
1169                         rn_fds = cn_fds;
1170                 } else {
1171                         int *t;
1172
1173                         if (!(t = new(int, rn_fds+cn_fds))) {
1174                                 free(cfds);
1175                                 r = -ENOMEM;
1176                                 goto fail;
1177                         }
1178
1179                         memcpy(t, rfds, rn_fds);
1180                         memcpy(t+rn_fds, cfds, cn_fds);
1181                         free(rfds);
1182                         free(cfds);
1183
1184                         rfds = t;
1185                         rn_fds = rn_fds+cn_fds;
1186                 }
1187         }
1188
1189         *fds = rfds;
1190         *n_fds = rn_fds;
1191
1192         set_free(set);
1193
1194         return 0;
1195
1196 fail:
1197         set_free(set);
1198         free(rfds);
1199
1200         return r;
1201 }
1202
1203 static int service_spawn(
1204                 Service *s,
1205                 ExecCommand *c,
1206                 bool timeout,
1207                 bool pass_fds,
1208                 bool apply_permissions,
1209                 bool apply_chroot,
1210                 pid_t *_pid) {
1211
1212         pid_t pid;
1213         int r;
1214         int *fds = NULL;
1215         unsigned n_fds = 0;
1216         char **argv;
1217
1218         assert(s);
1219         assert(c);
1220         assert(_pid);
1221
1222         if (pass_fds) {
1223                 if (s->socket_fd >= 0) {
1224                         fds = &s->socket_fd;
1225                         n_fds = 1;
1226                 } else if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1227                         goto fail;
1228         }
1229
1230         if (timeout && s->timeout_usec) {
1231                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1232                         goto fail;
1233         } else
1234                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1235
1236         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1237                 r = -ENOMEM;
1238                 goto fail;
1239         }
1240
1241         r = exec_spawn(c,
1242                        argv,
1243                        &s->exec_context,
1244                        fds, n_fds,
1245                        apply_permissions,
1246                        apply_chroot,
1247                        UNIT(s)->meta.manager->confirm_spawn,
1248                        UNIT(s)->meta.cgroup_bondings,
1249                        &pid);
1250
1251         strv_free(argv);
1252         if (r < 0)
1253                 goto fail;
1254
1255         if (fds) {
1256                 if (s->socket_fd >= 0)
1257                         service_close_socket_fd(s);
1258                 else
1259                         free(fds);
1260         }
1261
1262         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1263                 /* FIXME: we need to do something here */
1264                 goto fail;
1265
1266         *_pid = pid;
1267
1268         return 0;
1269
1270 fail:
1271         free(fds);
1272
1273         if (timeout)
1274                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1275
1276         return r;
1277 }
1278
1279 static int main_pid_good(Service *s) {
1280         assert(s);
1281
1282         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1283          * don't know */
1284
1285         /* If we know the pid file, then lets just check if it is
1286          * still valid */
1287         if (s->main_pid_known)
1288                 return s->main_pid > 0;
1289
1290         /* We don't know the pid */
1291         return -EAGAIN;
1292 }
1293
1294 static int control_pid_good(Service *s) {
1295         assert(s);
1296
1297         return s->control_pid > 0;
1298 }
1299
1300 static int cgroup_good(Service *s) {
1301         int r;
1302
1303         assert(s);
1304
1305         if (s->valid_no_process)
1306                 return -EAGAIN;
1307
1308         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1309                 return r;
1310
1311         return !r;
1312 }
1313
1314 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1315         int r;
1316         assert(s);
1317
1318         if (!success)
1319                 s->failure = true;
1320
1321         if (allow_restart &&
1322             s->allow_restart &&
1323             (s->restart == SERVICE_RESTART_ALWAYS ||
1324              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1325
1326                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1327                         goto fail;
1328
1329                 service_set_state(s, SERVICE_AUTO_RESTART);
1330         } else
1331                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1332
1333         return;
1334
1335 fail:
1336         log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1337         service_enter_dead(s, false, false);
1338 }
1339
1340 static void service_enter_signal(Service *s, ServiceState state, bool success);
1341
1342 static void service_enter_stop_post(Service *s, bool success) {
1343         int r;
1344         assert(s);
1345
1346         if (!success)
1347                 s->failure = true;
1348
1349         service_unwatch_control_pid(s);
1350
1351         s->control_command_id = SERVICE_EXEC_STOP_POST;
1352         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1353                 if ((r = service_spawn(s,
1354                                        s->control_command,
1355                                        true,
1356                                        false,
1357                                        !s->permissions_start_only,
1358                                        !s->root_directory_start_only,
1359                                        &s->control_pid)) < 0)
1360                         goto fail;
1361
1362
1363                 service_set_state(s, SERVICE_STOP_POST);
1364         } else
1365                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1366
1367         return;
1368
1369 fail:
1370         log_warning("%s failed to run stop-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1371         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1372 }
1373
1374 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1375         int r;
1376         bool sent = false;
1377
1378         assert(s);
1379
1380         if (!success)
1381                 s->failure = true;
1382
1383         if (s->kill_mode != KILL_NONE) {
1384                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1385
1386                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1387
1388                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1389                                 if (r != -EAGAIN && r != -ESRCH)
1390                                         goto fail;
1391                         } else
1392                                 sent = true;
1393                 }
1394
1395                 if (!sent) {
1396                         r = 0;
1397
1398                         if (s->main_pid > 0) {
1399                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1400                                         r = -errno;
1401                                 else
1402                                         sent = true;
1403                         }
1404
1405                         if (s->control_pid > 0) {
1406                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1407                                         r = -errno;
1408                                 else
1409                                         sent = true;
1410                         }
1411
1412                         if (r < 0)
1413                                 goto fail;
1414                 }
1415         }
1416
1417         if (sent && (s->main_pid > 0 || s->control_pid > 0)) {
1418                 if (s->timeout_usec > 0)
1419                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1420                                 goto fail;
1421
1422                 service_set_state(s, state);
1423         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1424                 service_enter_stop_post(s, true);
1425         else
1426                 service_enter_dead(s, true, true);
1427
1428         return;
1429
1430 fail:
1431         log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1432
1433         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1434                 service_enter_stop_post(s, false);
1435         else
1436                 service_enter_dead(s, false, true);
1437 }
1438
1439 static void service_enter_stop(Service *s, bool success) {
1440         int r;
1441         assert(s);
1442
1443         if (!success)
1444                 s->failure = true;
1445
1446         service_unwatch_control_pid(s);
1447
1448         s->control_command_id = SERVICE_EXEC_STOP;
1449         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1450                 if ((r = service_spawn(s,
1451                                        s->control_command,
1452                                        true,
1453                                        false,
1454                                        !s->permissions_start_only,
1455                                        !s->root_directory_start_only,
1456                                        &s->control_pid)) < 0)
1457                         goto fail;
1458
1459                 service_set_state(s, SERVICE_STOP);
1460         } else
1461                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1462
1463         return;
1464
1465 fail:
1466         log_warning("%s failed to run stop executable: %s", UNIT(s)->meta.id, strerror(-r));
1467         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1468 }
1469
1470 static void service_enter_running(Service *s, bool success) {
1471         assert(s);
1472
1473         if (!success)
1474                 s->failure = true;
1475
1476         if (main_pid_good(s) != 0 &&
1477             cgroup_good(s) != 0 &&
1478             (s->bus_name_good || s->type != SERVICE_DBUS))
1479                 service_set_state(s, SERVICE_RUNNING);
1480         else if (s->valid_no_process)
1481                 service_set_state(s, SERVICE_EXITED);
1482         else
1483                 service_enter_stop(s, true);
1484 }
1485
1486 static void service_enter_start_post(Service *s) {
1487         int r;
1488         assert(s);
1489
1490         service_unwatch_control_pid(s);
1491
1492         s->control_command_id = SERVICE_EXEC_START_POST;
1493         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1494                 if ((r = service_spawn(s,
1495                                        s->control_command,
1496                                        true,
1497                                        false,
1498                                        !s->permissions_start_only,
1499                                        !s->root_directory_start_only,
1500                                        &s->control_pid)) < 0)
1501                         goto fail;
1502
1503
1504                 service_set_state(s, SERVICE_START_POST);
1505         } else
1506                 service_enter_running(s, true);
1507
1508         return;
1509
1510 fail:
1511         log_warning("%s failed to run start-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1512         service_enter_stop(s, false);
1513 }
1514
1515 static void service_enter_start(Service *s) {
1516         pid_t pid;
1517         int r;
1518
1519         assert(s);
1520
1521         assert(s->exec_command[SERVICE_EXEC_START]);
1522         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1523
1524         if (s->type == SERVICE_FORKING)
1525                 service_unwatch_control_pid(s);
1526         else
1527                 service_unwatch_main_pid(s);
1528
1529         if ((r = service_spawn(s,
1530                                s->exec_command[SERVICE_EXEC_START],
1531                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS,
1532                                true,
1533                                true,
1534                                true,
1535                                &pid)) < 0)
1536                 goto fail;
1537
1538         if (s->type == SERVICE_SIMPLE) {
1539                 /* For simple services we immediately start
1540                  * the START_POST binaries. */
1541
1542                 s->main_pid = pid;
1543                 s->main_pid_known = true;
1544
1545                 service_enter_start_post(s);
1546
1547         } else  if (s->type == SERVICE_FORKING) {
1548
1549                 /* For forking services we wait until the start
1550                  * process exited. */
1551
1552                 s->control_pid = pid;
1553
1554                 s->control_command_id = SERVICE_EXEC_START;
1555                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1556                 service_set_state(s, SERVICE_START);
1557
1558         } else if (s->type == SERVICE_FINISH ||
1559                    s->type == SERVICE_DBUS) {
1560
1561                 /* For finishing services we wait until the start
1562                  * process exited, too, but it is our main process. */
1563
1564                 /* For D-Bus services we know the main pid right away,
1565                  * but wait for the bus name to appear on the bus. */
1566
1567                 s->main_pid = pid;
1568                 s->main_pid_known = true;
1569
1570                 service_set_state(s, SERVICE_START);
1571         } else
1572                 assert_not_reached("Unknown service type");
1573
1574         return;
1575
1576 fail:
1577         log_warning("%s failed to run start exectuable: %s", UNIT(s)->meta.id, strerror(-r));
1578         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1579 }
1580
1581 static void service_enter_start_pre(Service *s) {
1582         int r;
1583
1584         assert(s);
1585
1586         service_unwatch_control_pid(s);
1587
1588         s->control_command_id = SERVICE_EXEC_START_PRE;
1589         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1590                 if ((r = service_spawn(s,
1591                                        s->control_command,
1592                                        true,
1593                                        false,
1594                                        !s->permissions_start_only,
1595                                        !s->root_directory_start_only,
1596                                        &s->control_pid)) < 0)
1597                         goto fail;
1598
1599                 service_set_state(s, SERVICE_START_PRE);
1600         } else
1601                 service_enter_start(s);
1602
1603         return;
1604
1605 fail:
1606         log_warning("%s failed to run start-pre executable: %s", UNIT(s)->meta.id, strerror(-r));
1607         service_enter_dead(s, false, true);
1608 }
1609
1610 static void service_enter_restart(Service *s) {
1611         int r;
1612         assert(s);
1613
1614         service_enter_dead(s, true, false);
1615
1616         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1617                 goto fail;
1618
1619         log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1620         return;
1621
1622 fail:
1623
1624         log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1625         service_enter_dead(s, false, false);
1626 }
1627
1628 static void service_enter_reload(Service *s) {
1629         int r;
1630
1631         assert(s);
1632
1633         service_unwatch_control_pid(s);
1634
1635         s->control_command_id = SERVICE_EXEC_RELOAD;
1636         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1637                 if ((r = service_spawn(s,
1638                                        s->control_command,
1639                                        true,
1640                                        false,
1641                                        !s->permissions_start_only,
1642                                        !s->root_directory_start_only,
1643                                        &s->control_pid)) < 0)
1644                         goto fail;
1645
1646                 service_set_state(s, SERVICE_RELOAD);
1647         } else
1648                 service_enter_running(s, true);
1649
1650         return;
1651
1652 fail:
1653         log_warning("%s failed to run reload executable: %s", UNIT(s)->meta.id, strerror(-r));
1654         service_enter_stop(s, false);
1655 }
1656
1657 static void service_run_next(Service *s, bool success) {
1658         int r;
1659
1660         assert(s);
1661         assert(s->control_command);
1662         assert(s->control_command->command_next);
1663
1664         if (!success)
1665                 s->failure = true;
1666
1667         s->control_command = s->control_command->command_next;
1668
1669         service_unwatch_control_pid(s);
1670
1671         if ((r = service_spawn(s,
1672                                s->control_command,
1673                                true,
1674                                false,
1675                                !s->permissions_start_only,
1676                                !s->root_directory_start_only,
1677                                &s->control_pid)) < 0)
1678                 goto fail;
1679
1680         return;
1681
1682 fail:
1683         log_warning("%s failed to run spawn next executable: %s", UNIT(s)->meta.id, strerror(-r));
1684
1685         if (s->state == SERVICE_START_PRE)
1686                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1687         else if (s->state == SERVICE_STOP)
1688                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1689         else if (s->state == SERVICE_STOP_POST)
1690                 service_enter_dead(s, false, true);
1691         else
1692                 service_enter_stop(s, false);
1693 }
1694
1695 static int service_start(Unit *u) {
1696         Service *s = SERVICE(u);
1697
1698         assert(s);
1699
1700         /* We cannot fulfill this request right now, try again later
1701          * please! */
1702         if (s->state == SERVICE_STOP ||
1703             s->state == SERVICE_STOP_SIGTERM ||
1704             s->state == SERVICE_STOP_SIGKILL ||
1705             s->state == SERVICE_STOP_POST ||
1706             s->state == SERVICE_FINAL_SIGTERM ||
1707             s->state == SERVICE_FINAL_SIGKILL)
1708                 return -EAGAIN;
1709
1710         /* Already on it! */
1711         if (s->state == SERVICE_START_PRE ||
1712             s->state == SERVICE_START ||
1713             s->state == SERVICE_START_POST)
1714                 return 0;
1715
1716         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1717
1718         /* Make sure we don't enter a busy loop of some kind. */
1719         if (!ratelimit_test(&s->ratelimit)) {
1720                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1721                 return -EAGAIN;
1722         }
1723
1724         s->failure = false;
1725         s->main_pid_known = false;
1726         s->allow_restart = true;
1727
1728         service_enter_start_pre(s);
1729         return 0;
1730 }
1731
1732 static int service_stop(Unit *u) {
1733         Service *s = SERVICE(u);
1734
1735         assert(s);
1736
1737         /* Cannot do this now */
1738         if (s->state == SERVICE_START_PRE ||
1739             s->state == SERVICE_START ||
1740             s->state == SERVICE_START_POST ||
1741             s->state == SERVICE_RELOAD)
1742                 return -EAGAIN;
1743
1744         /* Already on it */
1745         if (s->state == SERVICE_STOP ||
1746             s->state == SERVICE_STOP_SIGTERM ||
1747             s->state == SERVICE_STOP_SIGKILL ||
1748             s->state == SERVICE_STOP_POST ||
1749             s->state == SERVICE_FINAL_SIGTERM ||
1750             s->state == SERVICE_FINAL_SIGKILL)
1751                 return 0;
1752
1753         if (s->state == SERVICE_AUTO_RESTART) {
1754                 service_set_state(s, SERVICE_DEAD);
1755                 return 0;
1756         }
1757
1758         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1759
1760         /* This is a user request, so don't do restarts on this
1761          * shutdown. */
1762         s->allow_restart = false;
1763
1764         service_enter_stop(s, true);
1765         return 0;
1766 }
1767
1768 static int service_reload(Unit *u) {
1769         Service *s = SERVICE(u);
1770
1771         assert(s);
1772
1773         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1774
1775         service_enter_reload(s);
1776         return 0;
1777 }
1778
1779 static bool service_can_reload(Unit *u) {
1780         Service *s = SERVICE(u);
1781
1782         assert(s);
1783
1784         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1785 }
1786
1787 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1788         Service *s = SERVICE(u);
1789
1790         assert(u);
1791         assert(f);
1792         assert(fds);
1793
1794         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1795         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1796
1797         if (s->control_pid > 0)
1798                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) (s->control_pid));
1799
1800         if (s->main_pid > 0)
1801                 unit_serialize_item_format(u, f, "main-pid", "%u", (unsigned) (s->main_pid));
1802
1803         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1804
1805         /* There's a minor uncleanliness here: if there are multiple
1806          * commands attached here, we will start from the first one
1807          * again */
1808         if (s->control_command_id >= 0)
1809                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
1810
1811         if (s->socket_fd >= 0) {
1812                 int copy;
1813
1814                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1815                         return copy;
1816
1817                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1818         }
1819
1820         return 0;
1821 }
1822
1823 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1824         Service *s = SERVICE(u);
1825         int r;
1826
1827         assert(u);
1828         assert(key);
1829         assert(value);
1830         assert(fds);
1831
1832         if (streq(key, "state")) {
1833                 ServiceState state;
1834
1835                 if ((state = service_state_from_string(value)) < 0)
1836                         log_debug("Failed to parse state value %s", value);
1837                 else
1838                         s->deserialized_state = state;
1839         } else if (streq(key, "failure")) {
1840                 int b;
1841
1842                 if ((b = parse_boolean(value)) < 0)
1843                         log_debug("Failed to parse failure value %s", value);
1844                 else
1845                         s->failure = b || s->failure;
1846         } else if (streq(key, "control-pid")) {
1847                 unsigned pid;
1848
1849                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1850                         log_debug("Failed to parse control-pid value %s", value);
1851                 else
1852                         s->control_pid = (pid_t) pid;
1853         } else if (streq(key, "main-pid")) {
1854                 unsigned pid;
1855
1856                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1857                         log_debug("Failed to parse main-pid value %s", value);
1858                 else
1859                         s->main_pid = (pid_t) pid;
1860         } else if (streq(key, "main-pid-known")) {
1861                 int b;
1862
1863                 if ((b = parse_boolean(value)) < 0)
1864                         log_debug("Failed to parse main-pid-known value %s", value);
1865                 else
1866                         s->main_pid_known = b;
1867         } else if (streq(key, "control-command")) {
1868                 ServiceExecCommand id;
1869
1870                 if ((id = service_exec_command_from_string(value)) < 0)
1871                         log_debug("Failed to parse exec-command value %s", value);
1872                 else {
1873                         s->control_command_id = id;
1874                         s->control_command = s->exec_command[id];
1875                 }
1876         } else if (streq(key, "socket-fd")) {
1877                 int fd;
1878
1879                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1880                         log_debug("Failed to parse socket-fd value %s", value);
1881                 else {
1882
1883                         if (s->socket_fd >= 0)
1884                                 close_nointr_nofail(s->socket_fd);
1885                         s->socket_fd = fdset_remove(fds, fd);
1886                 }
1887         } else
1888                 log_debug("Unknown serialization key '%s'", key);
1889
1890         return 0;
1891 }
1892
1893 static UnitActiveState service_active_state(Unit *u) {
1894         assert(u);
1895
1896         return state_translation_table[SERVICE(u)->state];
1897 }
1898
1899 static const char *service_sub_state_to_string(Unit *u) {
1900         assert(u);
1901
1902         return service_state_to_string(SERVICE(u)->state);
1903 }
1904
1905 static bool service_check_gc(Unit *u) {
1906         Service *s = SERVICE(u);
1907
1908         assert(s);
1909
1910         return !!s->sysv_path;
1911 }
1912
1913 static bool service_check_snapshot(Unit *u) {
1914         Service *s = SERVICE(u);
1915
1916         assert(s);
1917
1918         return !s->got_socket_fd;
1919 }
1920
1921 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1922         Service *s = SERVICE(u);
1923         bool success;
1924
1925         assert(s);
1926         assert(pid >= 0);
1927
1928         success = code == CLD_EXITED && status == 0;
1929         s->failure = s->failure || !success;
1930
1931         if (s->main_pid == pid) {
1932
1933                 exec_status_fill(&s->main_exec_status, pid, code, status);
1934                 s->main_pid = 0;
1935
1936                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1937                         assert(s->exec_command[SERVICE_EXEC_START]);
1938                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1939                 }
1940
1941                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
1942
1943                 /* The service exited, so the service is officially
1944                  * gone. */
1945
1946                 switch (s->state) {
1947
1948                 case SERVICE_START_POST:
1949                 case SERVICE_RELOAD:
1950                 case SERVICE_STOP:
1951                         /* Need to wait until the operation is
1952                          * done */
1953                         break;
1954
1955                 case SERVICE_START:
1956                         assert(s->type == SERVICE_FINISH);
1957
1958                         /* This was our main goal, so let's go on */
1959                         if (success)
1960                                 service_enter_start_post(s);
1961                         else
1962                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1963                         break;
1964
1965                 case SERVICE_RUNNING:
1966                         service_enter_running(s, success);
1967                         break;
1968
1969                 case SERVICE_STOP_SIGTERM:
1970                 case SERVICE_STOP_SIGKILL:
1971
1972                         if (!control_pid_good(s))
1973                                 service_enter_stop_post(s, success);
1974
1975                         /* If there is still a control process, wait for that first */
1976                         break;
1977
1978                 default:
1979                         assert_not_reached("Uh, main process died at wrong time.");
1980                 }
1981
1982         } else if (s->control_pid == pid) {
1983
1984                 if (s->control_command)
1985                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
1986
1987                 s->control_pid = 0;
1988
1989                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1990
1991                 /* If we are shutting things down anyway we
1992                  * don't care about failing commands. */
1993
1994                 if (s->control_command && s->control_command->command_next && success) {
1995
1996                         /* There is another command to *
1997                          * execute, so let's do that. */
1998
1999                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
2000                         service_run_next(s, success);
2001
2002                 } else {
2003                         /* No further commands for this step, so let's
2004                          * figure out what to do next */
2005
2006                         s->control_command = NULL;
2007                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2008
2009                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2010
2011                         switch (s->state) {
2012
2013                         case SERVICE_START_PRE:
2014                                 if (success)
2015                                         service_enter_start(s);
2016                                 else
2017                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2018                                 break;
2019
2020                         case SERVICE_START:
2021                                 assert(s->type == SERVICE_FORKING);
2022
2023                                 /* Let's try to load the pid
2024                                  * file here if we can. We
2025                                  * ignore the return value,
2026                                  * since the PID file might
2027                                  * actually be created by a
2028                                  * START_POST script */
2029
2030                                 if (success) {
2031                                         if (s->pid_file)
2032                                                 service_load_pid_file(s);
2033
2034                                         service_enter_start_post(s);
2035                                 } else
2036                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2037
2038                                 break;
2039
2040                         case SERVICE_START_POST:
2041                                 if (success && s->pid_file && !s->main_pid_known) {
2042                                         int r;
2043
2044                                         /* Hmm, let's see if we can
2045                                          * load the pid now after the
2046                                          * start-post scripts got
2047                                          * executed. */
2048
2049                                         if ((r = service_load_pid_file(s)) < 0)
2050                                                 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
2051                                 }
2052
2053                                 /* Fall through */
2054
2055                         case SERVICE_RELOAD:
2056                                 if (success)
2057                                         service_enter_running(s, true);
2058                                 else
2059                                         service_enter_stop(s, false);
2060
2061                                 break;
2062
2063                         case SERVICE_STOP:
2064                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2065                                 break;
2066
2067                         case SERVICE_STOP_SIGTERM:
2068                         case SERVICE_STOP_SIGKILL:
2069                                 if (main_pid_good(s) <= 0)
2070                                         service_enter_stop_post(s, success);
2071
2072                                 /* If there is still a service
2073                                  * process around, wait until
2074                                  * that one quit, too */
2075                                 break;
2076
2077                         case SERVICE_STOP_POST:
2078                         case SERVICE_FINAL_SIGTERM:
2079                         case SERVICE_FINAL_SIGKILL:
2080                                 service_enter_dead(s, success, true);
2081                                 break;
2082
2083                         default:
2084                                 assert_not_reached("Uh, control process died at wrong time.");
2085                         }
2086                 }
2087         } else
2088                 assert_not_reached("Got SIGCHLD for unkown PID");
2089 }
2090
2091 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2092         Service *s = SERVICE(u);
2093
2094         assert(s);
2095         assert(elapsed == 1);
2096
2097         assert(w == &s->timer_watch);
2098
2099         switch (s->state) {
2100
2101         case SERVICE_START_PRE:
2102         case SERVICE_START:
2103                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2104                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2105                 break;
2106
2107         case SERVICE_START_POST:
2108         case SERVICE_RELOAD:
2109                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2110                 service_enter_stop(s, false);
2111                 break;
2112
2113         case SERVICE_STOP:
2114                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2115                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2116                 break;
2117
2118         case SERVICE_STOP_SIGTERM:
2119                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2120                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2121                 break;
2122
2123         case SERVICE_STOP_SIGKILL:
2124                 /* Uh, wie sent a SIGKILL and it is still not gone?
2125                  * Must be something we cannot kill, so let's just be
2126                  * weirded out and continue */
2127
2128                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2129                 service_enter_stop_post(s, false);
2130                 break;
2131
2132         case SERVICE_STOP_POST:
2133                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2134                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2135                 break;
2136
2137         case SERVICE_FINAL_SIGTERM:
2138                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2139                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2140                 break;
2141
2142         case SERVICE_FINAL_SIGKILL:
2143                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
2144                 service_enter_dead(s, false, true);
2145                 break;
2146
2147         case SERVICE_AUTO_RESTART:
2148                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2149                 service_enter_restart(s);
2150                 break;
2151
2152         default:
2153                 assert_not_reached("Timeout at wrong time.");
2154         }
2155 }
2156
2157 static void service_cgroup_notify_event(Unit *u) {
2158         Service *s = SERVICE(u);
2159
2160         assert(u);
2161
2162         log_debug("%s: cgroup is empty", u->meta.id);
2163
2164         switch (s->state) {
2165
2166                 /* Waiting for SIGCHLD is usually more interesting,
2167                  * because it includes return codes/signals. Which is
2168                  * why we ignore the cgroup events for most cases,
2169                  * except when we don't know pid which to expect the
2170                  * SIGCHLD for. */
2171
2172         case SERVICE_RUNNING:
2173                 service_enter_running(s, true);
2174                 break;
2175
2176         default:
2177                 ;
2178         }
2179 }
2180
2181 static int service_enumerate(Manager *m) {
2182         char **p;
2183         unsigned i;
2184         DIR *d = NULL;
2185         char *path = NULL, *fpath = NULL, *name = NULL;
2186         int r;
2187
2188         assert(m);
2189
2190         STRV_FOREACH(p, m->sysvrcnd_path)
2191                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
2192                         struct dirent *de;
2193
2194                         free(path);
2195                         path = NULL;
2196                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
2197                                 r = -ENOMEM;
2198                                 goto finish;
2199                         }
2200
2201                         if (d)
2202                                 closedir(d);
2203
2204                         if (!(d = opendir(path))) {
2205                                 if (errno != ENOENT)
2206                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2207
2208                                 continue;
2209                         }
2210
2211                         while ((de = readdir(d))) {
2212                                 Unit *service;
2213
2214                                 if (ignore_file(de->d_name))
2215                                         continue;
2216
2217                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2218                                         continue;
2219
2220                                 if (strlen(de->d_name) < 4)
2221                                         continue;
2222
2223                                 free(fpath);
2224                                 fpath = NULL;
2225                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
2226                                         r = -ENOMEM;
2227                                         goto finish;
2228                                 }
2229
2230                                 if (access(fpath, X_OK) < 0) {
2231
2232                                         if (errno != ENOENT)
2233                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2234
2235                                         continue;
2236                                 }
2237
2238                                 free(name);
2239                                 name = NULL;
2240                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
2241                                         r = -ENOMEM;
2242                                         goto finish;
2243                                 }
2244
2245                                 if ((r = manager_load_unit(m, name, NULL, &service)) < 0)
2246                                         goto finish;
2247
2248                                 if (de->d_name[0] == 'S') {
2249                                         Unit *runlevel_target;
2250
2251                                         if ((r = manager_load_unit(m, rcnd_table[i+1], NULL, &runlevel_target)) < 0)
2252                                                 goto finish;
2253
2254                                         if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2255                                                 goto finish;
2256
2257                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, runlevel_target, true)) < 0)
2258                                                 goto finish;
2259
2260                                 } else if (de->d_name[0] == 'K' &&
2261                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
2262                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
2263
2264                                         Unit *shutdown_target;
2265
2266                                         /* We honour K links only for
2267                                          * halt/reboot. For the normal
2268                                          * runlevels we assume the
2269                                          * stop jobs will be
2270                                          * implicitly added by the
2271                                          * core logic. Also, we don't
2272                                          * really distuingish here
2273                                          * between the runlevels 0 and
2274                                          * 6 and just add them to the
2275                                          * special shutdown target. */
2276
2277                                         if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2278                                                 goto finish;
2279
2280                                         if ((r = unit_add_dependency(service, UNIT_CONFLICTS, shutdown_target, true)) < 0)
2281                                                 goto finish;
2282
2283                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, shutdown_target, true)) < 0)
2284                                                 goto finish;
2285                                 }
2286                         }
2287                 }
2288
2289         r = 0;
2290
2291 finish:
2292         free(path);
2293         free(fpath);
2294         free(name);
2295         closedir(d);
2296
2297         return r;
2298 }
2299
2300 static void service_bus_name_owner_change(
2301                 Unit *u,
2302                 const char *name,
2303                 const char *old_owner,
2304                 const char *new_owner) {
2305
2306         Service *s = SERVICE(u);
2307
2308         assert(s);
2309         assert(name);
2310
2311         assert(streq(s->bus_name, name));
2312         assert(old_owner || new_owner);
2313
2314         if (old_owner && new_owner)
2315                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2316         else if (old_owner)
2317                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2318         else
2319                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2320
2321         s->bus_name_good = !!new_owner;
2322
2323         if (s->type == SERVICE_DBUS) {
2324
2325                 /* service_enter_running() will figure out what to
2326                  * do */
2327                 if (s->state == SERVICE_RUNNING)
2328                         service_enter_running(s, true);
2329                 else if (s->state == SERVICE_START && new_owner)
2330                         service_enter_start_post(s);
2331
2332         } else if (new_owner &&
2333                    s->main_pid <= 0 &&
2334                    (s->state == SERVICE_START ||
2335                     s->state == SERVICE_START_POST ||
2336                     s->state == SERVICE_RUNNING ||
2337                     s->state == SERVICE_RELOAD)) {
2338
2339                 /* Try to acquire PID from bus service */
2340                 log_debug("Trying to acquire PID from D-Bus name...");
2341
2342                 bus_query_pid(u->meta.manager, name);
2343         }
2344 }
2345
2346 static void service_bus_query_pid_done(
2347                 Unit *u,
2348                 const char *name,
2349                 pid_t pid) {
2350
2351         Service *s = SERVICE(u);
2352
2353         assert(s);
2354         assert(name);
2355
2356         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2357
2358         if (s->main_pid <= 0 &&
2359             (s->state == SERVICE_START ||
2360              s->state == SERVICE_START_POST ||
2361              s->state == SERVICE_RUNNING ||
2362              s->state == SERVICE_RELOAD))
2363                 s->main_pid = pid;
2364 }
2365
2366 int service_set_socket_fd(Service *s, int fd) {
2367         assert(s);
2368         assert(fd >= 0);
2369
2370         /* This is called by the socket code when instantiating a new
2371          * service for a stream socket and the socket needs to be
2372          * configured. */
2373
2374         if (UNIT(s)->meta.load_state != UNIT_LOADED)
2375                 return -EINVAL;
2376
2377         if (s->socket_fd >= 0)
2378                 return -EBUSY;
2379
2380         if (s->state != SERVICE_DEAD)
2381                 return -EAGAIN;
2382
2383         s->socket_fd = fd;
2384         s->got_socket_fd = true;
2385         return 0;
2386 }
2387
2388 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2389         [SERVICE_DEAD] = "dead",
2390         [SERVICE_START_PRE] = "start-pre",
2391         [SERVICE_START] = "start",
2392         [SERVICE_START_POST] = "start-post",
2393         [SERVICE_RUNNING] = "running",
2394         [SERVICE_EXITED] = "exited",
2395         [SERVICE_RELOAD] = "reload",
2396         [SERVICE_STOP] = "stop",
2397         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2398         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2399         [SERVICE_STOP_POST] = "stop-post",
2400         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2401         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2402         [SERVICE_MAINTAINANCE] = "maintainance",
2403         [SERVICE_AUTO_RESTART] = "auto-restart",
2404 };
2405
2406 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2407
2408 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2409         [SERVICE_ONCE] = "once",
2410         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2411         [SERVICE_RESTART_ALWAYS] = "restart-always",
2412 };
2413
2414 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2415
2416 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2417         [SERVICE_FORKING] = "forking",
2418         [SERVICE_SIMPLE] = "simple",
2419         [SERVICE_FINISH] = "finish",
2420         [SERVICE_DBUS] = "dbus"
2421 };
2422
2423 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2424
2425 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2426         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2427         [SERVICE_EXEC_START] = "ExecStart",
2428         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2429         [SERVICE_EXEC_RELOAD] = "ExecReload",
2430         [SERVICE_EXEC_STOP] = "ExecStop",
2431         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2432 };
2433
2434 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2435
2436 const UnitVTable service_vtable = {
2437         .suffix = ".service",
2438
2439         .init = service_init,
2440         .done = service_done,
2441         .load = service_load,
2442
2443         .coldplug = service_coldplug,
2444
2445         .dump = service_dump,
2446
2447         .start = service_start,
2448         .stop = service_stop,
2449         .reload = service_reload,
2450
2451         .can_reload = service_can_reload,
2452
2453         .serialize = service_serialize,
2454         .deserialize_item = service_deserialize_item,
2455
2456         .active_state = service_active_state,
2457         .sub_state_to_string = service_sub_state_to_string,
2458
2459         .check_gc = service_check_gc,
2460         .check_snapshot = service_check_snapshot,
2461
2462         .sigchld_event = service_sigchld_event,
2463         .timer_event = service_timer_event,
2464
2465         .cgroup_notify_empty = service_cgroup_notify_event,
2466
2467         .bus_name_owner_change = service_bus_name_owner_change,
2468         .bus_query_pid_done = service_bus_query_pid_done,
2469
2470         .bus_message_handler = bus_service_message_handler,
2471
2472         .enumerate = service_enumerate
2473 };