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