src/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 typedef enum RunlevelType {
  41         RUNLEVEL_UP,
  42         RUNLEVEL_DOWN,
  43         RUNLEVEL_BASIC
  44 } RunlevelType;
  45
  46 static const struct {
  47         const char *path;
  48         const char *target;
  49         const RunlevelType type;
  50 } rcnd_table[] = {
  51         /* Standard SysV runlevels */
  52         { "rc0.d",  SPECIAL_RUNLEVEL0_TARGET, RUNLEVEL_DOWN },
  53         { "rc1.d",  SPECIAL_RUNLEVEL1_TARGET, RUNLEVEL_UP },
  54         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  55         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  56         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  57         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  58         { "rc6.d",  SPECIAL_RUNLEVEL6_TARGET, RUNLEVEL_DOWN },
  59
  60         /* SUSE style boot.d */
  61         { "boot.d", SPECIAL_BASIC_TARGET,     RUNLEVEL_BASIC },
  62
  63         /* Debian style rcS.d */
  64         { "rcS.d",  SPECIAL_BASIC_TARGET,     RUNLEVEL_BASIC },
  65 };
  66
  67 #define RUNLEVELS_UP "12345"
  68 /* #define RUNLEVELS_DOWN "06" */
  69 /* #define RUNLEVELS_BOOT "bBsS" */
  70
  71 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  72         [SERVICE_DEAD] = UNIT_INACTIVE,
  73         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  74         [SERVICE_START] = UNIT_ACTIVATING,
  75         [SERVICE_START_POST] = UNIT_ACTIVATING,
  76         [SERVICE_RUNNING] = UNIT_ACTIVE,
  77         [SERVICE_EXITED] = UNIT_ACTIVE,
  78         [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
  79         [SERVICE_STOP] = UNIT_DEACTIVATING,
  80         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  81         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  82         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  83         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  84         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  85         [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
  86         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
  87 };
  88
  89 static void service_init(Unit *u) {
  90         Service *s = SERVICE(u);
  91
  92         assert(u);
  93         assert(u->meta.load_state == UNIT_STUB);
  94
  95         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  96         s->restart_usec = DEFAULT_RESTART_USEC;
  97         s->timer_watch.type = WATCH_INVALID;
  98         s->sysv_start_priority = -1;
  99         s->socket_fd = -1;
 100
 101         exec_context_init(&s->exec_context);
 102
 103         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 104
 105         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 106 }
 107
 108 static void service_unwatch_control_pid(Service *s) {
 109         assert(s);
 110
 111         if (s->control_pid <= 0)
 112                 return;
 113
 114         unit_unwatch_pid(UNIT(s), s->control_pid);
 115         s->control_pid = 0;
 116 }
 117
 118 static void service_unwatch_main_pid(Service *s) {
 119         assert(s);
 120
 121         if (s->main_pid <= 0)
 122                 return;
 123
 124         unit_unwatch_pid(UNIT(s), s->main_pid);
 125         s->main_pid = 0;
 126 }
 127
 128 static void service_close_socket_fd(Service *s) {
 129         assert(s);
 130
 131         if (s->socket_fd < 0)
 132                 return;
 133
 134         close_nointr_nofail(s->socket_fd);
 135         s->socket_fd = -1;
 136 }
 137
 138 static void service_done(Unit *u) {
 139         Service *s = SERVICE(u);
 140
 141         assert(s);
 142
 143         free(s->pid_file);
 144         s->pid_file = NULL;
 145
 146         free(s->sysv_path);
 147         s->sysv_path = NULL;
 148
 149         free(s->sysv_runlevels);
 150         s->sysv_runlevels = NULL;
 151
 152         exec_context_done(&s->exec_context);
 153         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 154         s->control_command = NULL;
 155
 156         /* This will leak a process, but at least no memory or any of
 157          * our resources */
 158         service_unwatch_main_pid(s);
 159         service_unwatch_control_pid(s);
 160
 161         if (s->bus_name)  {
 162                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 163                 free(s->bus_name);
 164                 s->bus_name = NULL;
 165         }
 166
 167         service_close_socket_fd(s);
 168
 169         unit_unwatch_timer(u, &s->timer_watch);
 170 }
 171
 172 static char *sysv_translate_name(const char *name) {
 173         char *r;
 174
 175         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 176                 return NULL;
 177
 178         if (startswith(name, "boot."))
 179                 /* Drop SuSE-style boot. prefix */
 180                 strcpy(stpcpy(r, name + 5), ".service");
 181         else if (endswith(name, ".sh"))
 182                 /* Drop Debian-style .sh suffix */
 183                 strcpy(stpcpy(r, name) - 3, ".service");
 184         else
 185                 /* Normal init scripts */
 186                 strcpy(stpcpy(r, name), ".service");
 187
 188         return r;
 189 }
 190
 191 static int sysv_translate_facility(const char *name, char **_r) {
 192
 193         static const char * const table[] = {
 194                 /* LSB defined facilities */
 195                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 196                 "$network",   SPECIAL_NETWORK_TARGET,
 197                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 198                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 199                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 200                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 201                 "$time",      SPECIAL_RTC_SET_TARGET,
 202
 203                 /* Debian extensions */
 204                 "$mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 205                 "$mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 206                 "$x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE
 207         };
 208
 209         unsigned i;
 210         char *r;
 211
 212         for (i = 0; i < ELEMENTSOF(table); i += 2)
 213                 if (streq(table[i], name)) {
 214                         if (!(r = strdup(table[i+1])))
 215                                 return -ENOMEM;
 216
 217                         goto finish;
 218                 }
 219
 220         if (*name == '$')
 221                 return 0;
 222
 223         if (!(r = sysv_translate_name(name)))
 224                 return -ENOMEM;
 225
 226 finish:
 227
 228         if (_r)
 229                 *_r = r;
 230
 231         return 1;
 232 }
 233
 234 static int sysv_fix_order(Service *s) {
 235         Meta *other;
 236         int r;
 237
 238         assert(s);
 239
 240         if (s->sysv_start_priority < 0)
 241                 return 0;
 242
 243         /* For each pair of services where at least one lacks a LSB
 244          * header, we use the start priority value to order things. */
 245
 246         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 247                 Service *t;
 248                 UnitDependency d;
 249
 250                 t = (Service*) other;
 251
 252                 if (s == t)
 253                         continue;
 254
 255                 if (t->sysv_start_priority < 0)
 256                         continue;
 257
 258                 /* If both units have modern headers we don't care
 259                  * about the priorities */
 260                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 261                     (!t->sysv_path || t->sysv_has_lsb))
 262                         continue;
 263
 264                 if (t->sysv_start_priority < s->sysv_start_priority)
 265                         d = UNIT_AFTER;
 266                 else if (t->sysv_start_priority > s->sysv_start_priority)
 267                         d = UNIT_BEFORE;
 268                 else
 269                         continue;
 270
 271                 /* FIXME: Maybe we should compare the name here lexicographically? */
 272
 273                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 274                         return r;
 275         }
 276
 277         return 0;
 278 }
 279
 280 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 281         ExecCommand *c;
 282
 283         if (!(c = new0(ExecCommand, 1)))
 284                 return NULL;
 285
 286         if (!(c->path = strdup(path))) {
 287                 free(c);
 288                 return NULL;
 289         }
 290
 291         if (!(c->argv = strv_new(path, arg1, NULL))) {
 292                 free(c->path);
 293                 free(c);
 294                 return NULL;
 295         }
 296
 297         return c;
 298 }
 299
 300 static int sysv_exec_commands(Service *s) {
 301         ExecCommand *c;
 302
 303         assert(s);
 304         assert(s->sysv_path);
 305
 306         if (!(c = exec_command_new(s->sysv_path, "start")))
 307                 return -ENOMEM;
 308         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 309
 310         if (!(c = exec_command_new(s->sysv_path, "stop")))
 311                 return -ENOMEM;
 312         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 313
 314         if (!(c = exec_command_new(s->sysv_path, "reload")))
 315                 return -ENOMEM;
 316         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 317
 318         return 0;
 319 }
 320
 321 static int service_load_sysv_path(Service *s, const char *path) {
 322         FILE *f;
 323         Unit *u;
 324         unsigned line = 0;
 325         int r;
 326         enum {
 327                 NORMAL,
 328                 DESCRIPTION,
 329                 LSB,
 330                 LSB_DESCRIPTION
 331         } state = NORMAL;
 332
 333         assert(s);
 334         assert(path);
 335
 336         u = UNIT(s);
 337
 338         if (!(f = fopen(path, "re"))) {
 339                 r = errno == ENOENT ? 0 : -errno;
 340                 goto finish;
 341         }
 342
 343         s->type = SERVICE_FORKING;
 344         s->restart = SERVICE_ONCE;
 345
 346         free(s->sysv_path);
 347         if (!(s->sysv_path = strdup(path))) {
 348                 r = -ENOMEM;
 349                 goto finish;
 350         }
 351
 352         while (!feof(f)) {
 353                 char l[LINE_MAX], *t;
 354
 355                 if (!fgets(l, sizeof(l), f)) {
 356                         if (feof(f))
 357                                 break;
 358
 359                         r = -errno;
 360                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 361                         goto finish;
 362                 }
 363
 364                 line++;
 365
 366                 t = strstrip(l);
 367                 if (*t != '#')
 368                         continue;
 369
 370                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 371                         state = LSB;
 372                         s->sysv_has_lsb = true;
 373                         continue;
 374                 }
 375
 376                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 377                         state = NORMAL;
 378                         continue;
 379                 }
 380
 381                 t++;
 382                 t += strspn(t, WHITESPACE);
 383
 384                 if (state == NORMAL) {
 385
 386                         /* Try to parse Red Hat style chkconfig headers */
 387
 388                         if (startswith_no_case(t, "chkconfig:")) {
 389                                 int start_priority;
 390                                 char runlevels[16], *k;
 391
 392                                 state = NORMAL;
 393
 394                                 if (sscanf(t+10, "%15s %i %*i",
 395                                            runlevels,
 396                                            &start_priority) != 2) {
 397
 398                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 399                                         continue;
 400                                 }
 401
 402                                 /* A start priority gathered from the
 403                                  * symlink farms is preferred over the
 404                                  * data from the LSB header. */
 405                                 if (start_priority < 0 || start_priority > 99)
 406                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 407                                 else if (s->sysv_start_priority < 0)
 408                                         s->sysv_start_priority = start_priority;
 409
 410                                 char_array_0(runlevels);
 411                                 k = delete_chars(runlevels, WHITESPACE "-");
 412
 413                                 if (k[0]) {
 414                                         char *d;
 415
 416                                         if (!(d = strdup(k))) {
 417                                                 r = -ENOMEM;
 418                                                 goto finish;
 419                                         }
 420
 421                                         free(s->sysv_runlevels);
 422                                         s->sysv_runlevels = d;
 423                                 }
 424
 425                         } else if (startswith_no_case(t, "description:")) {
 426
 427                                 size_t k = strlen(t);
 428                                 char *d;
 429
 430                                 if (t[k-1] == '\\') {
 431                                         state = DESCRIPTION;
 432                                         t[k-1] = 0;
 433                                 }
 434
 435                                 if (!(d = strdup(strstrip(t+12)))) {
 436                                         r = -ENOMEM;
 437                                         goto finish;
 438                                 }
 439
 440                                 free(u->meta.description);
 441                                 u->meta.description = d;
 442
 443                         } else if (startswith_no_case(t, "pidfile:")) {
 444
 445                                 char *fn;
 446
 447                                 state = NORMAL;
 448
 449                                 fn = strstrip(t+8);
 450                                 if (!path_is_absolute(fn)) {
 451                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 452                                         continue;
 453                                 }
 454
 455                                 if (!(fn = strdup(fn))) {
 456                                         r = -ENOMEM;
 457                                         goto finish;
 458                                 }
 459
 460                                 free(s->pid_file);
 461                                 s->pid_file = fn;
 462                         }
 463
 464                 } else if (state == DESCRIPTION) {
 465
 466                         /* Try to parse Red Hat style description
 467                          * continuation */
 468
 469                         size_t k = strlen(t);
 470                         char *d;
 471
 472                         if (t[k-1] == '\\')
 473                                 t[k-1] = 0;
 474                         else
 475                                 state = NORMAL;
 476
 477                         assert(u->meta.description);
 478                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 479                                 r = -ENOMEM;
 480                                 goto finish;
 481                         }
 482
 483                         free(u->meta.description);
 484                         u->meta.description = d;
 485
 486                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 487
 488                         if (startswith_no_case(t, "Provides:")) {
 489                                 char *i, *w;
 490                                 size_t z;
 491
 492                                 state = LSB;
 493
 494                                 FOREACH_WORD(w, z, t+9, i) {
 495                                         char *n, *m;
 496
 497                                         if (!(n = strndup(w, z))) {
 498                                                 r = -ENOMEM;
 499                                                 goto finish;
 500                                         }
 501
 502                                         r = sysv_translate_facility(n, &m);
 503                                         free(n);
 504
 505                                         if (r < 0)
 506                                                 goto finish;
 507
 508                                         if (r == 0)
 509                                                 continue;
 510
 511                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 512                                                 r = unit_add_name(u, m);
 513                                         else {
 514                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m, NULL, true)) >= 0)
 515                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 516                                         }
 517
 518                                         free(m);
 519
 520                                         if (r < 0)
 521                                                 goto finish;
 522                                 }
 523
 524                         } else if (startswith_no_case(t, "Required-Start:") ||
 525                                    startswith_no_case(t, "Should-Start:") ||
 526                                    startswith_no_case(t, "X-Start-Before:") ||
 527                                    startswith_no_case(t, "X-Start-After:")) {
 528                                 char *i, *w;
 529                                 size_t z;
 530
 531                                 state = LSB;
 532
 533                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 534                                         char *n, *m;
 535
 536                                         if (!(n = strndup(w, z))) {
 537                                                 r = -ENOMEM;
 538                                                 goto finish;
 539                                         }
 540
 541                                         r = sysv_translate_facility(n, &m);
 542                                         free(n);
 543
 544                                         if (r < 0)
 545                                                 goto finish;
 546
 547                                         if (r == 0)
 548                                                 continue;
 549
 550                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 551                                         free(m);
 552
 553                                         if (r < 0)
 554                                                 goto finish;
 555                                 }
 556                         } else if (startswith_no_case(t, "Default-Start:")) {
 557                                 char *k, *d;
 558
 559                                 state = LSB;
 560
 561                                 k = delete_chars(t+14, WHITESPACE "-");
 562
 563                                 if (k[0] != 0) {
 564                                         if (!(d = strdup(k))) {
 565                                                 r = -ENOMEM;
 566                                                 goto finish;
 567                                         }
 568
 569                                         free(s->sysv_runlevels);
 570                                         s->sysv_runlevels = d;
 571                                 }
 572
 573                         } else if (startswith_no_case(t, "Description:")) {
 574                                 char *d;
 575
 576                                 state = LSB_DESCRIPTION;
 577
 578                                 if (!(d = strdup(strstrip(t+12)))) {
 579                                         r = -ENOMEM;
 580                                         goto finish;
 581                                 }
 582
 583                                 free(u->meta.description);
 584                                 u->meta.description = d;
 585
 586                         } else if (startswith_no_case(t, "Short-Description:") &&
 587                                    !u->meta.description) {
 588                                 char *d;
 589
 590                                 /* We use the short description only
 591                                  * if no long description is set. */
 592
 593                                 state = LSB;
 594
 595                                 if (!(d = strdup(strstrip(t+18)))) {
 596                                         r = -ENOMEM;
 597                                         goto finish;
 598                                 }
 599
 600                                 u->meta.description = d;
 601
 602                         } else if (state == LSB_DESCRIPTION) {
 603
 604                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 605                                         char *d;
 606
 607                                         assert(u->meta.description);
 608                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 609                                                 r = -ENOMEM;
 610                                                 goto finish;
 611                                         }
 612
 613                                         free(u->meta.description);
 614                                         u->meta.description = d;
 615                                 } else
 616                                         state = LSB;
 617                         }
 618                 }
 619         }
 620
 621         if ((r = sysv_exec_commands(s)) < 0)
 622                 goto finish;
 623
 624         if (!s->sysv_runlevels || chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 625                 /* If there a runlevels configured for this service
 626                  * but none of the standard ones, then we assume this
 627                  * is some special kind of service (which might be
 628                  * needed for early boot) and don't create any links
 629                  * to it. */
 630
 631                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0 ||
 632                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 633                         goto finish;
 634
 635         } else
 636                 /* Don't timeout special services during boot (like fsck) */
 637                 s->timeout_usec = 0;
 638
 639         /* Special setting for all SysV services */
 640         s->valid_no_process = true;
 641         s->kill_mode = KILL_PROCESS_GROUP;
 642
 643         u->meta.load_state = UNIT_LOADED;
 644         r = 0;
 645
 646 finish:
 647
 648         if (f)
 649                 fclose(f);
 650
 651         return r;
 652 }
 653
 654 static int service_load_sysv_name(Service *s, const char *name) {
 655         char **p;
 656
 657         assert(s);
 658         assert(name);
 659
 660         /* For SysV services we strip the boot. or .sh
 661          * prefixes/suffixes. */
 662         if (startswith(name, "boot.") ||
 663             endswith(name, ".sh.service"))
 664                 return -ENOENT;
 665
 666         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 667                 char *path;
 668                 int r;
 669
 670                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 671                         return -ENOMEM;
 672
 673                 assert(endswith(path, ".service"));
 674                 path[strlen(path)-8] = 0;
 675
 676                 r = service_load_sysv_path(s, path);
 677
 678                 if (r >= 0 && UNIT(s)->meta.load_state == UNIT_STUB) {
 679                         /* Try Debian style xxx.sh source'able init scripts */
 680                         strcat(path, ".sh");
 681                         r = service_load_sysv_path(s, path);
 682                 }
 683
 684                 free(path);
 685
 686                 if (r >= 0 && UNIT(s)->meta.load_state == UNIT_STUB) {
 687                         /* Try SUSE style boot.xxx init scripts */
 688
 689                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 690                                 return -ENOMEM;
 691
 692                         path[strlen(path)-8] = 0;
 693                         r = service_load_sysv_path(s, path);
 694                         free(path);
 695                 }
 696
 697                 if (r < 0)
 698                         return r;
 699
 700                 if ((UNIT(s)->meta.load_state != UNIT_STUB))
 701                         break;
 702         }
 703
 704         return 0;
 705 }
 706
 707 static int service_load_sysv(Service *s) {
 708         const char *t;
 709         Iterator i;
 710         int r;
 711
 712         assert(s);
 713
 714         /* Load service data from SysV init scripts, preferably with
 715          * LSB headers ... */
 716
 717         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 718                 return 0;
 719
 720         if ((t = UNIT(s)->meta.id))
 721                 if ((r = service_load_sysv_name(s, t)) < 0)
 722                         return r;
 723
 724         if (UNIT(s)->meta.load_state == UNIT_STUB)
 725                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 726                         if (t == UNIT(s)->meta.id)
 727                                 continue;
 728
 729                         if ((r == service_load_sysv_name(s, t)) < 0)
 730                                 return r;
 731
 732                         if (UNIT(s)->meta.load_state != UNIT_STUB)
 733                                 break;
 734                 }
 735
 736         return 0;
 737 }
 738
 739 static int service_add_bus_name(Service *s) {
 740         char *n;
 741         int r;
 742
 743         assert(s);
 744         assert(s->bus_name);
 745
 746         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 747                 return 0;
 748
 749         r = unit_merge_by_name(UNIT(s), n);
 750         free(n);
 751
 752         return r;
 753 }
 754
 755 static int service_verify(Service *s) {
 756         assert(s);
 757
 758         if (UNIT(s)->meta.load_state != UNIT_LOADED)
 759                 return 0;
 760
 761         if (!s->exec_command[SERVICE_EXEC_START]) {
 762                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->meta.id);
 763                 return -EINVAL;
 764         }
 765
 766         if (s->type == SERVICE_DBUS && !s->bus_name) {
 767                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->meta.id);
 768                 return -EINVAL;
 769         }
 770
 771         return 0;
 772 }
 773
 774 static int service_load(Unit *u) {
 775         int r;
 776         Service *s = SERVICE(u);
 777
 778         assert(s);
 779
 780         /* Load a .service file */
 781         if ((r = unit_load_fragment(u)) < 0)
 782                 return r;
 783
 784         /* Load a classic init script as a fallback, if we couldn't find anything */
 785         if (u->meta.load_state == UNIT_STUB)
 786                 if ((r = service_load_sysv(s)) < 0)
 787                         return r;
 788
 789         /* Still nothing found? Then let's give up */
 790         if (u->meta.load_state == UNIT_STUB)
 791                 return -ENOENT;
 792
 793         /* We were able to load something, then let's add in the
 794          * dropin directories. */
 795         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 796                 return r;
 797
 798         /* This is a new unit? Then let's add in some extras */
 799         if (u->meta.load_state == UNIT_LOADED) {
 800                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 801                         return r;
 802
 803                 if ((r = unit_add_default_cgroup(u)) < 0)
 804                         return r;
 805
 806                 if ((r = sysv_fix_order(s)) < 0)
 807                         return r;
 808
 809                 if (s->bus_name) {
 810                         if ((r = service_add_bus_name(s)) < 0)
 811                                 return r;
 812
 813                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 814                             return r;
 815                 }
 816         }
 817
 818         return service_verify(s);
 819 }
 820
 821 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 822
 823         ServiceExecCommand c;
 824         Service *s = SERVICE(u);
 825         const char *prefix2;
 826         char *p2;
 827
 828         assert(s);
 829
 830         p2 = strappend(prefix, "\t");
 831         prefix2 = p2 ? p2 : prefix;
 832
 833         fprintf(f,
 834                 "%sService State: %s\n"
 835                 "%sPermissionsStartOnly: %s\n"
 836                 "%sRootDirectoryStartOnly: %s\n"
 837                 "%sValidNoProcess: %s\n"
 838                 "%sKillMode: %s\n"
 839                 "%sType: %s\n",
 840                 prefix, service_state_to_string(s->state),
 841                 prefix, yes_no(s->permissions_start_only),
 842                 prefix, yes_no(s->root_directory_start_only),
 843                 prefix, yes_no(s->valid_no_process),
 844                 prefix, kill_mode_to_string(s->kill_mode),
 845                 prefix, service_type_to_string(s->type));
 846
 847         if (s->control_pid > 0)
 848                 fprintf(f,
 849                         "%sControl PID: %llu\n",
 850                         prefix, (unsigned long long) s->control_pid);
 851
 852         if (s->main_pid > 0)
 853                 fprintf(f,
 854                         "%sMain PID: %llu\n",
 855                         prefix, (unsigned long long) s->main_pid);
 856
 857         if (s->pid_file)
 858                 fprintf(f,
 859                         "%sPIDFile: %s\n",
 860                         prefix, s->pid_file);
 861
 862         if (s->bus_name)
 863                 fprintf(f,
 864                         "%sBusName: %s\n"
 865                         "%sBus Name Good: %s\n",
 866                         prefix, s->bus_name,
 867                         prefix, yes_no(s->bus_name_good));
 868
 869         exec_context_dump(&s->exec_context, f, prefix);
 870
 871         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 872
 873                 if (!s->exec_command[c])
 874                         continue;
 875
 876                 fprintf(f, "%s-> %s:\n",
 877                         prefix, service_exec_command_to_string(c));
 878
 879                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 880         }
 881
 882         if (s->sysv_path)
 883                 fprintf(f,
 884                         "%sSysV Init Script Path: %s\n"
 885                         "%sSysV Init Script has LSB Header: %s\n",
 886                         prefix, s->sysv_path,
 887                         prefix, yes_no(s->sysv_has_lsb));
 888
 889         if (s->sysv_start_priority >= 0)
 890                 fprintf(f,
 891                         "%sSysVStartPriority: %i\n",
 892                         prefix, s->sysv_start_priority);
 893
 894         if (s->sysv_runlevels)
 895                 fprintf(f, "%sSysVRunLevels: %s\n",
 896                         prefix, s->sysv_runlevels);
 897
 898         free(p2);
 899 }
 900
 901 static int service_load_pid_file(Service *s) {
 902         char *k;
 903         unsigned long p;
 904         int r;
 905
 906         assert(s);
 907
 908         if (s->main_pid_known)
 909                 return 0;
 910
 911         assert(s->main_pid <= 0);
 912
 913         if (!s->pid_file)
 914                 return -ENOENT;
 915
 916         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 917                 return r;
 918
 919         if ((r = safe_atolu(k, &p)) < 0) {
 920                 free(k);
 921                 return r;
 922         }
 923
 924         if ((unsigned long) (pid_t) p != p)
 925                 return -ERANGE;
 926
 927         if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
 928                 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
 929                             (unsigned long long) p, s->pid_file);
 930                 return -ESRCH;
 931         }
 932
 933         if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
 934                 /* FIXME: we need to do something here */
 935                 return r;
 936
 937         s->main_pid = (pid_t) p;
 938         s->main_pid_known = true;
 939
 940         return 0;
 941 }
 942
 943 static int service_get_sockets(Service *s, Set **_set) {
 944         Set *set;
 945         Iterator i;
 946         char *t;
 947         int r;
 948
 949         assert(s);
 950         assert(_set);
 951
 952         /* Collects all Socket objects that belong to this
 953          * service. Note that a service might have multiple sockets
 954          * via multiple names. */
 955
 956         if (!(set = set_new(NULL, NULL)))
 957                 return -ENOMEM;
 958
 959         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 960                 char *k;
 961                 Unit *p;
 962
 963                 /* Look for all socket objects that go by any of our
 964                  * units and collect their fds */
 965
 966                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 967                         r = -ENOMEM;
 968                         goto fail;
 969                 }
 970
 971                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 972                 free(k);
 973
 974                 if (!p)
 975                         continue;
 976
 977                 if ((r = set_put(set, p)) < 0)
 978                         goto fail;
 979         }
 980
 981         *_set = set;
 982         return 0;
 983
 984 fail:
 985         set_free(set);
 986         return r;
 987 }
 988
 989 static int service_notify_sockets_dead(Service *s) {
 990         Iterator i;
 991         Set *set;
 992         Socket *sock;
 993         int r;
 994
 995         assert(s);
 996
 997         /* Notifies all our sockets when we die */
 998         if ((r = service_get_sockets(s, &set)) < 0)
 999                 return r;
1000
1001         SET_FOREACH(sock, set, i)
1002                 socket_notify_service_dead(sock);
1003
1004         set_free(set);
1005
1006         return 0;
1007 }
1008
1009 static void service_set_state(Service *s, ServiceState state) {
1010         ServiceState old_state;
1011         assert(s);
1012
1013         old_state = s->state;
1014         s->state = state;
1015
1016         if (state != SERVICE_START_PRE &&
1017             state != SERVICE_START &&
1018             state != SERVICE_START_POST &&
1019             state != SERVICE_RELOAD &&
1020             state != SERVICE_STOP &&
1021             state != SERVICE_STOP_SIGTERM &&
1022             state != SERVICE_STOP_SIGKILL &&
1023             state != SERVICE_STOP_POST &&
1024             state != SERVICE_FINAL_SIGTERM &&
1025             state != SERVICE_FINAL_SIGKILL &&
1026             state != SERVICE_AUTO_RESTART)
1027                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1028
1029         if (state != SERVICE_START &&
1030             state != SERVICE_START_POST &&
1031             state != SERVICE_RUNNING &&
1032             state != SERVICE_RELOAD &&
1033             state != SERVICE_STOP &&
1034             state != SERVICE_STOP_SIGTERM &&
1035             state != SERVICE_STOP_SIGKILL)
1036                 service_unwatch_main_pid(s);
1037
1038         if (state != SERVICE_START_PRE &&
1039             state != SERVICE_START &&
1040             state != SERVICE_START_POST &&
1041             state != SERVICE_RELOAD &&
1042             state != SERVICE_STOP &&
1043             state != SERVICE_STOP_SIGTERM &&
1044             state != SERVICE_STOP_SIGKILL &&
1045             state != SERVICE_STOP_POST &&
1046             state != SERVICE_FINAL_SIGTERM &&
1047             state != SERVICE_FINAL_SIGKILL) {
1048                 service_unwatch_control_pid(s);
1049                 s->control_command = NULL;
1050                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1051         }
1052
1053         if (state == SERVICE_DEAD ||
1054             state == SERVICE_STOP ||
1055             state == SERVICE_STOP_SIGTERM ||
1056             state == SERVICE_STOP_SIGKILL ||
1057             state == SERVICE_STOP_POST ||
1058             state == SERVICE_FINAL_SIGTERM ||
1059             state == SERVICE_FINAL_SIGKILL ||
1060             state == SERVICE_MAINTAINANCE ||
1061             state == SERVICE_AUTO_RESTART)
1062                 service_notify_sockets_dead(s);
1063
1064         if (state != SERVICE_START_PRE &&
1065             state != SERVICE_START &&
1066             !(state == SERVICE_DEAD && UNIT(s)->meta.job))
1067                 service_close_socket_fd(s);
1068
1069         if (old_state != state)
1070                 log_debug("%s changed %s -> %s", UNIT(s)->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1071
1072         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1073 }
1074
1075 static int service_coldplug(Unit *u) {
1076         Service *s = SERVICE(u);
1077         int r;
1078
1079         assert(s);
1080         assert(s->state == SERVICE_DEAD);
1081
1082         if (s->deserialized_state != s->state) {
1083
1084                 if (s->deserialized_state == SERVICE_START_PRE ||
1085                     s->deserialized_state == SERVICE_START ||
1086                     s->deserialized_state == SERVICE_START_POST ||
1087                     s->deserialized_state == SERVICE_RELOAD ||
1088                     s->deserialized_state == SERVICE_STOP ||
1089                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1090                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1091                     s->deserialized_state == SERVICE_STOP_POST ||
1092                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1093                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1094                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1095
1096                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1097                                 usec_t k;
1098
1099                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1100
1101                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1102                                         return r;
1103                         }
1104                 }
1105
1106                 if ((s->deserialized_state == SERVICE_START &&
1107                      (s->type == SERVICE_FORKING ||
1108                       s->type == SERVICE_DBUS)) ||
1109                     s->deserialized_state == SERVICE_START_POST ||
1110                     s->deserialized_state == SERVICE_RUNNING ||
1111                     s->deserialized_state == SERVICE_RELOAD ||
1112                     s->deserialized_state == SERVICE_STOP ||
1113                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1114                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1115                         if (s->main_pid > 0)
1116                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1117                                         return r;
1118
1119                 if (s->deserialized_state == SERVICE_START_PRE ||
1120                     s->deserialized_state == SERVICE_START ||
1121                     s->deserialized_state == SERVICE_START_POST ||
1122                     s->deserialized_state == SERVICE_RELOAD ||
1123                     s->deserialized_state == SERVICE_STOP ||
1124                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1125                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1126                     s->deserialized_state == SERVICE_STOP_POST ||
1127                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1128                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1129                         if (s->control_pid > 0)
1130                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1131                                         return r;
1132
1133                 service_set_state(s, s->deserialized_state);
1134         }
1135
1136         return 0;
1137 }
1138
1139 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1140         Iterator i;
1141         int r;
1142         int *rfds = NULL;
1143         unsigned rn_fds = 0;
1144         Set *set;
1145         Socket *sock;
1146
1147         assert(s);
1148         assert(fds);
1149         assert(n_fds);
1150
1151         if ((r = service_get_sockets(s, &set)) < 0)
1152                 return r;
1153
1154         SET_FOREACH(sock, set, i) {
1155                 int *cfds;
1156                 unsigned cn_fds;
1157
1158                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1159                         goto fail;
1160
1161                 if (!cfds)
1162                         continue;
1163
1164                 if (!rfds) {
1165                         rfds = cfds;
1166                         rn_fds = cn_fds;
1167                 } else {
1168                         int *t;
1169
1170                         if (!(t = new(int, rn_fds+cn_fds))) {
1171                                 free(cfds);
1172                                 r = -ENOMEM;
1173                                 goto fail;
1174                         }
1175
1176                         memcpy(t, rfds, rn_fds);
1177                         memcpy(t+rn_fds, cfds, cn_fds);
1178                         free(rfds);
1179                         free(cfds);
1180
1181                         rfds = t;
1182                         rn_fds = rn_fds+cn_fds;
1183                 }
1184         }
1185
1186         *fds = rfds;
1187         *n_fds = rn_fds;
1188
1189         set_free(set);
1190
1191         return 0;
1192
1193 fail:
1194         set_free(set);
1195         free(rfds);
1196
1197         return r;
1198 }
1199
1200 static int service_spawn(
1201                 Service *s,
1202                 ExecCommand *c,
1203                 bool timeout,
1204                 bool pass_fds,
1205                 bool apply_permissions,
1206                 bool apply_chroot,
1207                 pid_t *_pid) {
1208
1209         pid_t pid;
1210         int r;
1211         int *fds = NULL;
1212         unsigned n_fds = 0;
1213         char **argv;
1214
1215         assert(s);
1216         assert(c);
1217         assert(_pid);
1218
1219         if (pass_fds) {
1220                 if (s->socket_fd >= 0) {
1221                         fds = &s->socket_fd;
1222                         n_fds = 1;
1223                 } else if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1224                         goto fail;
1225         }
1226
1227         if (timeout && s->timeout_usec) {
1228                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1229                         goto fail;
1230         } else
1231                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1232
1233         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1234                 r = -ENOMEM;
1235                 goto fail;
1236         }
1237
1238         r = exec_spawn(c,
1239                        argv,
1240                        &s->exec_context,
1241                        fds, n_fds,
1242                        s->meta.manager->environment,
1243                        apply_permissions,
1244                        apply_chroot,
1245                        UNIT(s)->meta.manager->confirm_spawn,
1246                        UNIT(s)->meta.cgroup_bondings,
1247                        &pid);
1248
1249         strv_free(argv);
1250         if (r < 0)
1251                 goto fail;
1252
1253         if (fds) {
1254                 if (s->socket_fd >= 0)
1255                         service_close_socket_fd(s);
1256                 else
1257                         free(fds);
1258         }
1259
1260         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1261                 /* FIXME: we need to do something here */
1262                 goto fail;
1263
1264         *_pid = pid;
1265
1266         return 0;
1267
1268 fail:
1269         free(fds);
1270
1271         if (timeout)
1272                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1273
1274         return r;
1275 }
1276
1277 static int main_pid_good(Service *s) {
1278         assert(s);
1279
1280         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1281          * don't know */
1282
1283         /* If we know the pid file, then lets just check if it is
1284          * still valid */
1285         if (s->main_pid_known)
1286                 return s->main_pid > 0;
1287
1288         /* We don't know the pid */
1289         return -EAGAIN;
1290 }
1291
1292 static int control_pid_good(Service *s) {
1293         assert(s);
1294
1295         return s->control_pid > 0;
1296 }
1297
1298 static int cgroup_good(Service *s) {
1299         int r;
1300
1301         assert(s);
1302
1303         if (s->valid_no_process)
1304                 return -EAGAIN;
1305
1306         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1307                 return r;
1308
1309         return !r;
1310 }
1311
1312 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1313         int r;
1314         assert(s);
1315
1316         if (!success)
1317                 s->failure = true;
1318
1319         if (allow_restart &&
1320             s->allow_restart &&
1321             (s->restart == SERVICE_RESTART_ALWAYS ||
1322              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1323
1324                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1325                         goto fail;
1326
1327                 service_set_state(s, SERVICE_AUTO_RESTART);
1328         } else
1329                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1330
1331         return;
1332
1333 fail:
1334         log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1335         service_enter_dead(s, false, false);
1336 }
1337
1338 static void service_enter_signal(Service *s, ServiceState state, bool success);
1339
1340 static void service_enter_stop_post(Service *s, bool success) {
1341         int r;
1342         assert(s);
1343
1344         if (!success)
1345                 s->failure = true;
1346
1347         service_unwatch_control_pid(s);
1348
1349         s->control_command_id = SERVICE_EXEC_STOP_POST;
1350         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1351                 if ((r = service_spawn(s,
1352                                        s->control_command,
1353                                        true,
1354                                        false,
1355                                        !s->permissions_start_only,
1356                                        !s->root_directory_start_only,
1357                                        &s->control_pid)) < 0)
1358                         goto fail;
1359
1360
1361                 service_set_state(s, SERVICE_STOP_POST);
1362         } else
1363                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1364
1365         return;
1366
1367 fail:
1368         log_warning("%s failed to run stop-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1369         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1370 }
1371
1372 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1373         int r;
1374         bool sent = false;
1375
1376         assert(s);
1377
1378         if (!success)
1379                 s->failure = true;
1380
1381         if (s->kill_mode != KILL_NONE) {
1382                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1383
1384                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1385
1386                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1387                                 if (r != -EAGAIN && r != -ESRCH)
1388                                         goto fail;
1389                         } else
1390                                 sent = true;
1391                 }
1392
1393                 if (!sent) {
1394                         r = 0;
1395
1396                         if (s->main_pid > 0) {
1397                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1398                                         r = -errno;
1399                                 else
1400                                         sent = true;
1401                         }
1402
1403                         if (s->control_pid > 0) {
1404                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1405                                         r = -errno;
1406                                 else
1407                                         sent = true;
1408                         }
1409
1410                         if (r < 0)
1411                                 goto fail;
1412                 }
1413         }
1414
1415         if (sent && (s->main_pid > 0 || s->control_pid > 0)) {
1416                 if (s->timeout_usec > 0)
1417                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1418                                 goto fail;
1419
1420                 service_set_state(s, state);
1421         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1422                 service_enter_stop_post(s, true);
1423         else
1424                 service_enter_dead(s, true, true);
1425
1426         return;
1427
1428 fail:
1429         log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1430
1431         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1432                 service_enter_stop_post(s, false);
1433         else
1434                 service_enter_dead(s, false, true);
1435 }
1436
1437 static void service_enter_stop(Service *s, bool success) {
1438         int r;
1439         assert(s);
1440
1441         if (!success)
1442                 s->failure = true;
1443
1444         service_unwatch_control_pid(s);
1445
1446         s->control_command_id = SERVICE_EXEC_STOP;
1447         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1448                 if ((r = service_spawn(s,
1449                                        s->control_command,
1450                                        true,
1451                                        false,
1452                                        !s->permissions_start_only,
1453                                        !s->root_directory_start_only,
1454                                        &s->control_pid)) < 0)
1455                         goto fail;
1456
1457                 service_set_state(s, SERVICE_STOP);
1458         } else
1459                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1460
1461         return;
1462
1463 fail:
1464         log_warning("%s failed to run stop executable: %s", UNIT(s)->meta.id, strerror(-r));
1465         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1466 }
1467
1468 static void service_enter_running(Service *s, bool success) {
1469         assert(s);
1470
1471         if (!success)
1472                 s->failure = true;
1473
1474         if (main_pid_good(s) != 0 &&
1475             cgroup_good(s) != 0 &&
1476             (s->bus_name_good || s->type != SERVICE_DBUS))
1477                 service_set_state(s, SERVICE_RUNNING);
1478         else if (s->valid_no_process)
1479                 service_set_state(s, SERVICE_EXITED);
1480         else
1481                 service_enter_stop(s, true);
1482 }
1483
1484 static void service_enter_start_post(Service *s) {
1485         int r;
1486         assert(s);
1487
1488         service_unwatch_control_pid(s);
1489
1490         s->control_command_id = SERVICE_EXEC_START_POST;
1491         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1492                 if ((r = service_spawn(s,
1493                                        s->control_command,
1494                                        true,
1495                                        false,
1496                                        !s->permissions_start_only,
1497                                        !s->root_directory_start_only,
1498                                        &s->control_pid)) < 0)
1499                         goto fail;
1500
1501
1502                 service_set_state(s, SERVICE_START_POST);
1503         } else
1504                 service_enter_running(s, true);
1505
1506         return;
1507
1508 fail:
1509         log_warning("%s failed to run start-post executable: %s", UNIT(s)->meta.id, strerror(-r));
1510         service_enter_stop(s, false);
1511 }
1512
1513 static void service_enter_start(Service *s) {
1514         pid_t pid;
1515         int r;
1516
1517         assert(s);
1518
1519         assert(s->exec_command[SERVICE_EXEC_START]);
1520         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1521
1522         if (s->type == SERVICE_FORKING)
1523                 service_unwatch_control_pid(s);
1524         else
1525                 service_unwatch_main_pid(s);
1526
1527         if ((r = service_spawn(s,
1528                                s->exec_command[SERVICE_EXEC_START],
1529                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS,
1530                                true,
1531                                true,
1532                                true,
1533                                &pid)) < 0)
1534                 goto fail;
1535
1536         if (s->type == SERVICE_SIMPLE) {
1537                 /* For simple services we immediately start
1538                  * the START_POST binaries. */
1539
1540                 s->main_pid = pid;
1541                 s->main_pid_known = true;
1542
1543                 service_enter_start_post(s);
1544
1545         } else  if (s->type == SERVICE_FORKING) {
1546
1547                 /* For forking services we wait until the start
1548                  * process exited. */
1549
1550                 s->control_pid = pid;
1551
1552                 s->control_command_id = SERVICE_EXEC_START;
1553                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1554                 service_set_state(s, SERVICE_START);
1555
1556         } else if (s->type == SERVICE_FINISH ||
1557                    s->type == SERVICE_DBUS) {
1558
1559                 /* For finishing services we wait until the start
1560                  * process exited, too, but it is our main process. */
1561
1562                 /* For D-Bus services we know the main pid right away,
1563                  * but wait for the bus name to appear on the bus. */
1564
1565                 s->main_pid = pid;
1566                 s->main_pid_known = true;
1567
1568                 service_set_state(s, SERVICE_START);
1569         } else
1570                 assert_not_reached("Unknown service type");
1571
1572         return;
1573
1574 fail:
1575         log_warning("%s failed to run start exectuable: %s", UNIT(s)->meta.id, strerror(-r));
1576         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1577 }
1578
1579 static void service_enter_start_pre(Service *s) {
1580         int r;
1581
1582         assert(s);
1583
1584         service_unwatch_control_pid(s);
1585
1586         s->control_command_id = SERVICE_EXEC_START_PRE;
1587         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1588                 if ((r = service_spawn(s,
1589                                        s->control_command,
1590                                        true,
1591                                        false,
1592                                        !s->permissions_start_only,
1593                                        !s->root_directory_start_only,
1594                                        &s->control_pid)) < 0)
1595                         goto fail;
1596
1597                 service_set_state(s, SERVICE_START_PRE);
1598         } else
1599                 service_enter_start(s);
1600
1601         return;
1602
1603 fail:
1604         log_warning("%s failed to run start-pre executable: %s", UNIT(s)->meta.id, strerror(-r));
1605         service_enter_dead(s, false, true);
1606 }
1607
1608 static void service_enter_restart(Service *s) {
1609         int r;
1610         assert(s);
1611
1612         service_enter_dead(s, true, false);
1613
1614         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1615                 goto fail;
1616
1617         log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1618         return;
1619
1620 fail:
1621
1622         log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1623         service_enter_dead(s, false, false);
1624 }
1625
1626 static void service_enter_reload(Service *s) {
1627         int r;
1628
1629         assert(s);
1630
1631         service_unwatch_control_pid(s);
1632
1633         s->control_command_id = SERVICE_EXEC_RELOAD;
1634         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1635                 if ((r = service_spawn(s,
1636                                        s->control_command,
1637                                        true,
1638                                        false,
1639                                        !s->permissions_start_only,
1640                                        !s->root_directory_start_only,
1641                                        &s->control_pid)) < 0)
1642                         goto fail;
1643
1644                 service_set_state(s, SERVICE_RELOAD);
1645         } else
1646                 service_enter_running(s, true);
1647
1648         return;
1649
1650 fail:
1651         log_warning("%s failed to run reload executable: %s", UNIT(s)->meta.id, strerror(-r));
1652         service_enter_stop(s, false);
1653 }
1654
1655 static void service_run_next(Service *s, bool success) {
1656         int r;
1657
1658         assert(s);
1659         assert(s->control_command);
1660         assert(s->control_command->command_next);
1661
1662         if (!success)
1663                 s->failure = true;
1664
1665         s->control_command = s->control_command->command_next;
1666
1667         service_unwatch_control_pid(s);
1668
1669         if ((r = service_spawn(s,
1670                                s->control_command,
1671                                true,
1672                                false,
1673                                !s->permissions_start_only,
1674                                !s->root_directory_start_only,
1675                                &s->control_pid)) < 0)
1676                 goto fail;
1677
1678         return;
1679
1680 fail:
1681         log_warning("%s failed to run spawn next executable: %s", UNIT(s)->meta.id, strerror(-r));
1682
1683         if (s->state == SERVICE_START_PRE)
1684                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1685         else if (s->state == SERVICE_STOP)
1686                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1687         else if (s->state == SERVICE_STOP_POST)
1688                 service_enter_dead(s, false, true);
1689         else
1690                 service_enter_stop(s, false);
1691 }
1692
1693 static int service_start(Unit *u) {
1694         Service *s = SERVICE(u);
1695
1696         assert(s);
1697
1698         /* We cannot fulfill this request right now, try again later
1699          * please! */
1700         if (s->state == SERVICE_STOP ||
1701             s->state == SERVICE_STOP_SIGTERM ||
1702             s->state == SERVICE_STOP_SIGKILL ||
1703             s->state == SERVICE_STOP_POST ||
1704             s->state == SERVICE_FINAL_SIGTERM ||
1705             s->state == SERVICE_FINAL_SIGKILL)
1706                 return -EAGAIN;
1707
1708         /* Already on it! */
1709         if (s->state == SERVICE_START_PRE ||
1710             s->state == SERVICE_START ||
1711             s->state == SERVICE_START_POST)
1712                 return 0;
1713
1714         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1715
1716         /* Make sure we don't enter a busy loop of some kind. */
1717         if (!ratelimit_test(&s->ratelimit)) {
1718                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1719                 return -ECANCELED;
1720         }
1721
1722         s->failure = false;
1723         s->main_pid_known = false;
1724         s->allow_restart = true;
1725
1726         service_enter_start_pre(s);
1727         return 0;
1728 }
1729
1730 static int service_stop(Unit *u) {
1731         Service *s = SERVICE(u);
1732
1733         assert(s);
1734
1735         /* Cannot do this now */
1736         if (s->state == SERVICE_START_PRE ||
1737             s->state == SERVICE_START ||
1738             s->state == SERVICE_START_POST ||
1739             s->state == SERVICE_RELOAD)
1740                 return -EAGAIN;
1741
1742         /* Already on it */
1743         if (s->state == SERVICE_STOP ||
1744             s->state == SERVICE_STOP_SIGTERM ||
1745             s->state == SERVICE_STOP_SIGKILL ||
1746             s->state == SERVICE_STOP_POST ||
1747             s->state == SERVICE_FINAL_SIGTERM ||
1748             s->state == SERVICE_FINAL_SIGKILL)
1749                 return 0;
1750
1751         if (s->state == SERVICE_AUTO_RESTART) {
1752                 service_set_state(s, SERVICE_DEAD);
1753                 return 0;
1754         }
1755
1756         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1757
1758         /* This is a user request, so don't do restarts on this
1759          * shutdown. */
1760         s->allow_restart = false;
1761
1762         service_enter_stop(s, true);
1763         return 0;
1764 }
1765
1766 static int service_reload(Unit *u) {
1767         Service *s = SERVICE(u);
1768
1769         assert(s);
1770
1771         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1772
1773         service_enter_reload(s);
1774         return 0;
1775 }
1776
1777 static bool service_can_reload(Unit *u) {
1778         Service *s = SERVICE(u);
1779
1780         assert(s);
1781
1782         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1783 }
1784
1785 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1786         Service *s = SERVICE(u);
1787
1788         assert(u);
1789         assert(f);
1790         assert(fds);
1791
1792         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1793         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1794
1795         if (s->control_pid > 0)
1796                 unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) (s->control_pid));
1797
1798         if (s->main_pid > 0)
1799                 unit_serialize_item_format(u, f, "main-pid", "%u", (unsigned) (s->main_pid));
1800
1801         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1802
1803         /* There's a minor uncleanliness here: if there are multiple
1804          * commands attached here, we will start from the first one
1805          * again */
1806         if (s->control_command_id >= 0)
1807                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
1808
1809         if (s->socket_fd >= 0) {
1810                 int copy;
1811
1812                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1813                         return copy;
1814
1815                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1816         }
1817
1818         return 0;
1819 }
1820
1821 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1822         Service *s = SERVICE(u);
1823         int r;
1824
1825         assert(u);
1826         assert(key);
1827         assert(value);
1828         assert(fds);
1829
1830         if (streq(key, "state")) {
1831                 ServiceState state;
1832
1833                 if ((state = service_state_from_string(value)) < 0)
1834                         log_debug("Failed to parse state value %s", value);
1835                 else
1836                         s->deserialized_state = state;
1837         } else if (streq(key, "failure")) {
1838                 int b;
1839
1840                 if ((b = parse_boolean(value)) < 0)
1841                         log_debug("Failed to parse failure value %s", value);
1842                 else
1843                         s->failure = b || s->failure;
1844         } else if (streq(key, "control-pid")) {
1845                 unsigned pid;
1846
1847                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1848                         log_debug("Failed to parse control-pid value %s", value);
1849                 else
1850                         s->control_pid = (pid_t) pid;
1851         } else if (streq(key, "main-pid")) {
1852                 unsigned pid;
1853
1854                 if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
1855                         log_debug("Failed to parse main-pid value %s", value);
1856                 else
1857                         s->main_pid = (pid_t) pid;
1858         } else if (streq(key, "main-pid-known")) {
1859                 int b;
1860
1861                 if ((b = parse_boolean(value)) < 0)
1862                         log_debug("Failed to parse main-pid-known value %s", value);
1863                 else
1864                         s->main_pid_known = b;
1865         } else if (streq(key, "control-command")) {
1866                 ServiceExecCommand id;
1867
1868                 if ((id = service_exec_command_from_string(value)) < 0)
1869                         log_debug("Failed to parse exec-command value %s", value);
1870                 else {
1871                         s->control_command_id = id;
1872                         s->control_command = s->exec_command[id];
1873                 }
1874         } else if (streq(key, "socket-fd")) {
1875                 int fd;
1876
1877                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1878                         log_debug("Failed to parse socket-fd value %s", value);
1879                 else {
1880
1881                         if (s->socket_fd >= 0)
1882                                 close_nointr_nofail(s->socket_fd);
1883                         s->socket_fd = fdset_remove(fds, fd);
1884                 }
1885         } else
1886                 log_debug("Unknown serialization key '%s'", key);
1887
1888         return 0;
1889 }
1890
1891 static UnitActiveState service_active_state(Unit *u) {
1892         assert(u);
1893
1894         return state_translation_table[SERVICE(u)->state];
1895 }
1896
1897 static const char *service_sub_state_to_string(Unit *u) {
1898         assert(u);
1899
1900         return service_state_to_string(SERVICE(u)->state);
1901 }
1902
1903 static bool service_check_gc(Unit *u) {
1904         Service *s = SERVICE(u);
1905
1906         assert(s);
1907
1908         return !!s->sysv_path;
1909 }
1910
1911 static bool service_check_snapshot(Unit *u) {
1912         Service *s = SERVICE(u);
1913
1914         assert(s);
1915
1916         return !s->got_socket_fd;
1917 }
1918
1919 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1920         Service *s = SERVICE(u);
1921         bool success;
1922
1923         assert(s);
1924         assert(pid >= 0);
1925
1926         success = is_clean_exit(code, status);
1927         s->failure = s->failure || !success;
1928
1929         if (s->main_pid == pid) {
1930
1931                 exec_status_fill(&s->main_exec_status, pid, code, status);
1932                 s->main_pid = 0;
1933
1934                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1935                         assert(s->exec_command[SERVICE_EXEC_START]);
1936                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1937                 }
1938
1939                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
1940
1941                 /* The service exited, so the service is officially
1942                  * gone. */
1943
1944                 switch (s->state) {
1945
1946                 case SERVICE_START_POST:
1947                 case SERVICE_RELOAD:
1948                 case SERVICE_STOP:
1949                         /* Need to wait until the operation is
1950                          * done */
1951                         break;
1952
1953                 case SERVICE_START:
1954                         assert(s->type == SERVICE_FINISH);
1955
1956                         /* This was our main goal, so let's go on */
1957                         if (success)
1958                                 service_enter_start_post(s);
1959                         else
1960                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1961                         break;
1962
1963                 case SERVICE_RUNNING:
1964                         service_enter_running(s, success);
1965                         break;
1966
1967                 case SERVICE_STOP_SIGTERM:
1968                 case SERVICE_STOP_SIGKILL:
1969
1970                         if (!control_pid_good(s))
1971                                 service_enter_stop_post(s, success);
1972
1973                         /* If there is still a control process, wait for that first */
1974                         break;
1975
1976                 default:
1977                         assert_not_reached("Uh, main process died at wrong time.");
1978                 }
1979
1980         } else if (s->control_pid == pid) {
1981
1982                 if (s->control_command)
1983                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
1984
1985                 s->control_pid = 0;
1986
1987                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
1988
1989                 /* If we are shutting things down anyway we
1990                  * don't care about failing commands. */
1991
1992                 if (s->control_command && s->control_command->command_next && success) {
1993
1994                         /* There is another command to *
1995                          * execute, so let's do that. */
1996
1997                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
1998                         service_run_next(s, success);
1999
2000                 } else {
2001                         /* No further commands for this step, so let's
2002                          * figure out what to do next */
2003
2004                         s->control_command = NULL;
2005                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2006
2007                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2008
2009                         switch (s->state) {
2010
2011                         case SERVICE_START_PRE:
2012                                 if (success)
2013                                         service_enter_start(s);
2014                                 else
2015                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2016                                 break;
2017
2018                         case SERVICE_START:
2019                                 assert(s->type == SERVICE_FORKING);
2020
2021                                 /* Let's try to load the pid
2022                                  * file here if we can. We
2023                                  * ignore the return value,
2024                                  * since the PID file might
2025                                  * actually be created by a
2026                                  * START_POST script */
2027
2028                                 if (success) {
2029                                         if (s->pid_file)
2030                                                 service_load_pid_file(s);
2031
2032                                         service_enter_start_post(s);
2033                                 } else
2034                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2035
2036                                 break;
2037
2038                         case SERVICE_START_POST:
2039                                 if (success && s->pid_file && !s->main_pid_known) {
2040                                         int r;
2041
2042                                         /* Hmm, let's see if we can
2043                                          * load the pid now after the
2044                                          * start-post scripts got
2045                                          * executed. */
2046
2047                                         if ((r = service_load_pid_file(s)) < 0)
2048                                                 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
2049                                 }
2050
2051                                 /* Fall through */
2052
2053                         case SERVICE_RELOAD:
2054                                 if (success)
2055                                         service_enter_running(s, true);
2056                                 else
2057                                         service_enter_stop(s, false);
2058
2059                                 break;
2060
2061                         case SERVICE_STOP:
2062                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2063                                 break;
2064
2065                         case SERVICE_STOP_SIGTERM:
2066                         case SERVICE_STOP_SIGKILL:
2067                                 if (main_pid_good(s) <= 0)
2068                                         service_enter_stop_post(s, success);
2069
2070                                 /* If there is still a service
2071                                  * process around, wait until
2072                                  * that one quit, too */
2073                                 break;
2074
2075                         case SERVICE_STOP_POST:
2076                         case SERVICE_FINAL_SIGTERM:
2077                         case SERVICE_FINAL_SIGKILL:
2078                                 service_enter_dead(s, success, true);
2079                                 break;
2080
2081                         default:
2082                                 assert_not_reached("Uh, control process died at wrong time.");
2083                         }
2084                 }
2085         } else
2086                 assert_not_reached("Got SIGCHLD for unkown PID");
2087 }
2088
2089 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2090         Service *s = SERVICE(u);
2091
2092         assert(s);
2093         assert(elapsed == 1);
2094
2095         assert(w == &s->timer_watch);
2096
2097         switch (s->state) {
2098
2099         case SERVICE_START_PRE:
2100         case SERVICE_START:
2101                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2102                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2103                 break;
2104
2105         case SERVICE_START_POST:
2106         case SERVICE_RELOAD:
2107                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2108                 service_enter_stop(s, false);
2109                 break;
2110
2111         case SERVICE_STOP:
2112                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2113                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2114                 break;
2115
2116         case SERVICE_STOP_SIGTERM:
2117                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2118                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2119                 break;
2120
2121         case SERVICE_STOP_SIGKILL:
2122                 /* Uh, wie sent a SIGKILL and it is still not gone?
2123                  * Must be something we cannot kill, so let's just be
2124                  * weirded out and continue */
2125
2126                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2127                 service_enter_stop_post(s, false);
2128                 break;
2129
2130         case SERVICE_STOP_POST:
2131                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2132                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2133                 break;
2134
2135         case SERVICE_FINAL_SIGTERM:
2136                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2137                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2138                 break;
2139
2140         case SERVICE_FINAL_SIGKILL:
2141                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
2142                 service_enter_dead(s, false, true);
2143                 break;
2144
2145         case SERVICE_AUTO_RESTART:
2146                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2147                 service_enter_restart(s);
2148                 break;
2149
2150         default:
2151                 assert_not_reached("Timeout at wrong time.");
2152         }
2153 }
2154
2155 static void service_cgroup_notify_event(Unit *u) {
2156         Service *s = SERVICE(u);
2157
2158         assert(u);
2159
2160         log_debug("%s: cgroup is empty", u->meta.id);
2161
2162         switch (s->state) {
2163
2164                 /* Waiting for SIGCHLD is usually more interesting,
2165                  * because it includes return codes/signals. Which is
2166                  * why we ignore the cgroup events for most cases,
2167                  * except when we don't know pid which to expect the
2168                  * SIGCHLD for. */
2169
2170         case SERVICE_RUNNING:
2171                 service_enter_running(s, true);
2172                 break;
2173
2174         default:
2175                 ;
2176         }
2177 }
2178
2179 static int service_enumerate(Manager *m) {
2180         char **p;
2181         unsigned i;
2182         DIR *d = NULL;
2183         char *path = NULL, *fpath = NULL, *name = NULL;
2184         int r;
2185
2186         assert(m);
2187
2188         STRV_FOREACH(p, m->sysvrcnd_path)
2189                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2190                         struct dirent *de;
2191
2192                         free(path);
2193                         path = NULL;
2194                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2195                                 r = -ENOMEM;
2196                                 goto finish;
2197                         }
2198
2199                         if (d)
2200                                 closedir(d);
2201
2202                         if (!(d = opendir(path))) {
2203                                 if (errno != ENOENT)
2204                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2205
2206                                 continue;
2207                         }
2208
2209                         while ((de = readdir(d))) {
2210                                 Unit *service;
2211                                 int a, b;
2212
2213                                 if (ignore_file(de->d_name))
2214                                         continue;
2215
2216                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2217                                         continue;
2218
2219                                 if (strlen(de->d_name) < 4)
2220                                         continue;
2221
2222                                 a = undecchar(de->d_name[1]);
2223                                 b = undecchar(de->d_name[2]);
2224
2225                                 if (a < 0 || b < 0)
2226                                         continue;
2227
2228                                 free(fpath);
2229                                 fpath = NULL;
2230                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2231                                         r = -ENOMEM;
2232                                         goto finish;
2233                                 }
2234
2235                                 if (access(fpath, X_OK) < 0) {
2236
2237                                         if (errno != ENOENT)
2238                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2239
2240                                         continue;
2241                                 }
2242
2243                                 free(name);
2244                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2245                                         r = -ENOMEM;
2246                                         goto finish;
2247                                 }
2248
2249                                 if ((r = manager_load_unit_prepare(m, name, NULL, &service)) < 0) {
2250                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2251                                         continue;
2252                                 }
2253
2254                                 if (de->d_name[0] == 'S' &&
2255                                     (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_BASIC))
2256                                         SERVICE(service)->sysv_start_priority =
2257                                                 MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2258
2259                                 manager_dispatch_load_queue(m);
2260                                 service = unit_follow_merge(service);
2261
2262                                 if (de->d_name[0] == 'S') {
2263                                         Unit *runlevel_target;
2264
2265                                         if ((r = manager_load_unit(m, rcnd_table[i].target, NULL, &runlevel_target)) < 0)
2266                                                 goto finish;
2267
2268                                         if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2269                                                 goto finish;
2270
2271                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, runlevel_target, true)) < 0)
2272                                                 goto finish;
2273
2274                                 } else if (de->d_name[0] == 'K' && rcnd_table[i].type == RUNLEVEL_DOWN) {
2275                                         Unit *shutdown_target;
2276
2277                                         /* We honour K links only for
2278                                          * halt/reboot. For the normal
2279                                          * runlevels we assume the
2280                                          * stop jobs will be
2281                                          * implicitly added by the
2282                                          * core logic. Also, we don't
2283                                          * really distuingish here
2284                                          * between the runlevels 0 and
2285                                          * 6 and just add them to the
2286                                          * special shutdown target. */
2287
2288                                         if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2289                                                 goto finish;
2290
2291                                         if ((r = unit_add_dependency(service, UNIT_CONFLICTS, shutdown_target, true)) < 0)
2292                                                 goto finish;
2293
2294                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, shutdown_target, true)) < 0)
2295                                                 goto finish;
2296                                 }
2297                         }
2298                 }
2299
2300         r = 0;
2301
2302 finish:
2303         free(path);
2304         free(fpath);
2305         free(name);
2306
2307         if (d)
2308                 closedir(d);
2309
2310         return r;
2311 }
2312
2313 static void service_bus_name_owner_change(
2314                 Unit *u,
2315                 const char *name,
2316                 const char *old_owner,
2317                 const char *new_owner) {
2318
2319         Service *s = SERVICE(u);
2320
2321         assert(s);
2322         assert(name);
2323
2324         assert(streq(s->bus_name, name));
2325         assert(old_owner || new_owner);
2326
2327         if (old_owner && new_owner)
2328                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2329         else if (old_owner)
2330                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2331         else
2332                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2333
2334         s->bus_name_good = !!new_owner;
2335
2336         if (s->type == SERVICE_DBUS) {
2337
2338                 /* service_enter_running() will figure out what to
2339                  * do */
2340                 if (s->state == SERVICE_RUNNING)
2341                         service_enter_running(s, true);
2342                 else if (s->state == SERVICE_START && new_owner)
2343                         service_enter_start_post(s);
2344
2345         } else if (new_owner &&
2346                    s->main_pid <= 0 &&
2347                    (s->state == SERVICE_START ||
2348                     s->state == SERVICE_START_POST ||
2349                     s->state == SERVICE_RUNNING ||
2350                     s->state == SERVICE_RELOAD)) {
2351
2352                 /* Try to acquire PID from bus service */
2353                 log_debug("Trying to acquire PID from D-Bus name...");
2354
2355                 bus_query_pid(u->meta.manager, name);
2356         }
2357 }
2358
2359 static void service_bus_query_pid_done(
2360                 Unit *u,
2361                 const char *name,
2362                 pid_t pid) {
2363
2364         Service *s = SERVICE(u);
2365
2366         assert(s);
2367         assert(name);
2368
2369         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2370
2371         if (s->main_pid <= 0 &&
2372             (s->state == SERVICE_START ||
2373              s->state == SERVICE_START_POST ||
2374              s->state == SERVICE_RUNNING ||
2375              s->state == SERVICE_RELOAD))
2376                 s->main_pid = pid;
2377 }
2378
2379 int service_set_socket_fd(Service *s, int fd) {
2380         assert(s);
2381         assert(fd >= 0);
2382
2383         /* This is called by the socket code when instantiating a new
2384          * service for a stream socket and the socket needs to be
2385          * configured. */
2386
2387         if (UNIT(s)->meta.load_state != UNIT_LOADED)
2388                 return -EINVAL;
2389
2390         if (s->socket_fd >= 0)
2391                 return -EBUSY;
2392
2393         if (s->state != SERVICE_DEAD)
2394                 return -EAGAIN;
2395
2396         s->socket_fd = fd;
2397         s->got_socket_fd = true;
2398         return 0;
2399 }
2400
2401 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2402         [SERVICE_DEAD] = "dead",
2403         [SERVICE_START_PRE] = "start-pre",
2404         [SERVICE_START] = "start",
2405         [SERVICE_START_POST] = "start-post",
2406         [SERVICE_RUNNING] = "running",
2407         [SERVICE_EXITED] = "exited",
2408         [SERVICE_RELOAD] = "reload",
2409         [SERVICE_STOP] = "stop",
2410         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2411         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2412         [SERVICE_STOP_POST] = "stop-post",
2413         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2414         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2415         [SERVICE_MAINTAINANCE] = "maintainance",
2416         [SERVICE_AUTO_RESTART] = "auto-restart",
2417 };
2418
2419 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2420
2421 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2422         [SERVICE_ONCE] = "once",
2423         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2424         [SERVICE_RESTART_ALWAYS] = "restart-always",
2425 };
2426
2427 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2428
2429 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2430         [SERVICE_FORKING] = "forking",
2431         [SERVICE_SIMPLE] = "simple",
2432         [SERVICE_FINISH] = "finish",
2433         [SERVICE_DBUS] = "dbus"
2434 };
2435
2436 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2437
2438 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2439         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2440         [SERVICE_EXEC_START] = "ExecStart",
2441         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2442         [SERVICE_EXEC_RELOAD] = "ExecReload",
2443         [SERVICE_EXEC_STOP] = "ExecStop",
2444         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2445 };
2446
2447 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2448
2449 const UnitVTable service_vtable = {
2450         .suffix = ".service",
2451
2452         .init = service_init,
2453         .done = service_done,
2454         .load = service_load,
2455
2456         .coldplug = service_coldplug,
2457
2458         .dump = service_dump,
2459
2460         .start = service_start,
2461         .stop = service_stop,
2462         .reload = service_reload,
2463
2464         .can_reload = service_can_reload,
2465
2466         .serialize = service_serialize,
2467         .deserialize_item = service_deserialize_item,
2468
2469         .active_state = service_active_state,
2470         .sub_state_to_string = service_sub_state_to_string,
2471
2472         .check_gc = service_check_gc,
2473         .check_snapshot = service_check_snapshot,
2474
2475         .sigchld_event = service_sigchld_event,
2476         .timer_event = service_timer_event,
2477
2478         .cgroup_notify_empty = service_cgroup_notify_event,
2479
2480         .bus_name_owner_change = service_bus_name_owner_change,
2481         .bus_query_pid_done = service_bus_query_pid_done,
2482
2483         .bus_message_handler = bus_service_message_handler,
2484
2485         .enumerate = service_enumerate
2486 };