src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   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 #include "special.h"
  36 #include "bus-errors.h"
  37 #include "exit-status.h"
  38 #include "def.h"
  39 #include "util.h"
  40
  41 #ifdef HAVE_SYSV_COMPAT
  42
  43 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
  44
  45 typedef enum RunlevelType {
  46         RUNLEVEL_UP,
  47         RUNLEVEL_DOWN,
  48         RUNLEVEL_SYSINIT
  49 } RunlevelType;
  50
  51 static const struct {
  52         const char *path;
  53         const char *target;
  54         const RunlevelType type;
  55 } rcnd_table[] = {
  56         /* Standard SysV runlevels for start-up */
  57         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  58         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  59         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  60         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  61         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  62
  63 #ifdef TARGET_SUSE
  64         /* SUSE style boot.d */
  65         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  66 #endif
  67
  68 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
  69         /* Debian style rcS.d */
  70         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  71 #endif
  72
  73         /* Standard SysV runlevels for shutdown */
  74         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  75         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  76
  77         /* Note that the order here matters, as we read the
  78            directories in this order, and we want to make sure that
  79            sysv_start_priority is known when we first load the
  80            unit. And that value we only know from S links. Hence
  81            UP/SYSINIT must be read before DOWN */
  82 };
  83
  84 #define RUNLEVELS_UP "12345"
  85 /* #define RUNLEVELS_DOWN "06" */
  86 #define RUNLEVELS_BOOT "bBsS"
  87 #endif
  88
  89 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  90         [SERVICE_DEAD] = UNIT_INACTIVE,
  91         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  92         [SERVICE_START] = UNIT_ACTIVATING,
  93         [SERVICE_START_POST] = UNIT_ACTIVATING,
  94         [SERVICE_RUNNING] = UNIT_ACTIVE,
  95         [SERVICE_EXITED] = UNIT_ACTIVE,
  96         [SERVICE_RELOAD] = UNIT_RELOADING,
  97         [SERVICE_STOP] = UNIT_DEACTIVATING,
  98         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  99         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 101         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 102         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 103         [SERVICE_FAILED] = UNIT_FAILED,
 104         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 105 };
 106
 107 static void service_init(Unit *u) {
 108         Service *s = SERVICE(u);
 109
 110         assert(u);
 111         assert(u->load_state == UNIT_STUB);
 112
 113         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 114         s->restart_usec = DEFAULT_RESTART_USEC;
 115         s->timer_watch.type = WATCH_INVALID;
 116 #ifdef HAVE_SYSV_COMPAT
 117         s->sysv_start_priority = -1;
 118         s->sysv_start_priority_from_rcnd = -1;
 119 #endif
 120         s->socket_fd = -1;
 121         s->guess_main_pid = true;
 122
 123         exec_context_init(&s->exec_context);
 124
 125         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 126
 127         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 128 }
 129
 130 static void service_unwatch_control_pid(Service *s) {
 131         assert(s);
 132
 133         if (s->control_pid <= 0)
 134                 return;
 135
 136         unit_unwatch_pid(UNIT(s), s->control_pid);
 137         s->control_pid = 0;
 138 }
 139
 140 static void service_unwatch_main_pid(Service *s) {
 141         assert(s);
 142
 143         if (s->main_pid <= 0)
 144                 return;
 145
 146         unit_unwatch_pid(UNIT(s), s->main_pid);
 147         s->main_pid = 0;
 148 }
 149
 150 static void service_unwatch_pid_file(Service *s) {
 151         if (!s->pid_file_pathspec)
 152                 return;
 153
 154         log_debug("Stopping watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
 155         path_spec_unwatch(s->pid_file_pathspec, UNIT(s));
 156         path_spec_done(s->pid_file_pathspec);
 157         free(s->pid_file_pathspec);
 158         s->pid_file_pathspec = NULL;
 159 }
 160
 161 static int service_set_main_pid(Service *s, pid_t pid) {
 162         pid_t ppid;
 163
 164         assert(s);
 165
 166         if (pid <= 1)
 167                 return -EINVAL;
 168
 169         if (pid == getpid())
 170                 return -EINVAL;
 171
 172         s->main_pid = pid;
 173         s->main_pid_known = true;
 174
 175         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
 176                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 177                             UNIT(s)->id, (unsigned long) pid);
 178
 179                 s->main_pid_alien = true;
 180         } else
 181                 s->main_pid_alien = false;
 182
 183         exec_status_start(&s->main_exec_status, pid);
 184
 185         return 0;
 186 }
 187
 188 static void service_close_socket_fd(Service *s) {
 189         assert(s);
 190
 191         if (s->socket_fd < 0)
 192                 return;
 193
 194         close_nointr_nofail(s->socket_fd);
 195         s->socket_fd = -1;
 196 }
 197
 198 static void service_connection_unref(Service *s) {
 199         assert(s);
 200
 201         if (!UNIT_DEREF(s->accept_socket))
 202                 return;
 203
 204         socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
 205         unit_ref_unset(&s->accept_socket);
 206 }
 207
 208 static void service_done(Unit *u) {
 209         Service *s = SERVICE(u);
 210
 211         assert(s);
 212
 213         free(s->pid_file);
 214         s->pid_file = NULL;
 215
 216 #ifdef HAVE_SYSV_COMPAT
 217         free(s->sysv_path);
 218         s->sysv_path = NULL;
 219
 220         free(s->sysv_runlevels);
 221         s->sysv_runlevels = NULL;
 222 #endif
 223
 224         free(s->status_text);
 225         s->status_text = NULL;
 226
 227         exec_context_done(&s->exec_context);
 228         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 229         s->control_command = NULL;
 230         s->main_command = NULL;
 231
 232         /* This will leak a process, but at least no memory or any of
 233          * our resources */
 234         service_unwatch_main_pid(s);
 235         service_unwatch_control_pid(s);
 236         service_unwatch_pid_file(s);
 237
 238         if (s->bus_name)  {
 239                 unit_unwatch_bus_name(u, s->bus_name);
 240                 free(s->bus_name);
 241                 s->bus_name = NULL;
 242         }
 243
 244         service_close_socket_fd(s);
 245         service_connection_unref(s);
 246
 247         unit_ref_unset(&s->accept_socket);
 248
 249         unit_unwatch_timer(u, &s->timer_watch);
 250 }
 251
 252 #ifdef HAVE_SYSV_COMPAT
 253 static char *sysv_translate_name(const char *name) {
 254         char *r;
 255
 256         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 257                 return NULL;
 258
 259 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
 260         if (endswith(name, ".sh"))
 261                 /* Drop Debian-style .sh suffix */
 262                 strcpy(stpcpy(r, name) - 3, ".service");
 263 #endif
 264 #ifdef TARGET_SUSE
 265         if (startswith(name, "boot."))
 266                 /* Drop SuSE-style boot. prefix */
 267                 strcpy(stpcpy(r, name + 5), ".service");
 268 #endif
 269 #ifdef TARGET_FRUGALWARE
 270         if (startswith(name, "rc."))
 271                 /* Drop Frugalware-style rc. prefix */
 272                 strcpy(stpcpy(r, name + 3), ".service");
 273 #endif
 274         else
 275                 /* Normal init scripts */
 276                 strcpy(stpcpy(r, name), ".service");
 277
 278         return r;
 279 }
 280
 281 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 282
 283         /* We silently ignore the $ prefix here. According to the LSB
 284          * spec it simply indicates whether something is a
 285          * standardized name or a distribution-specific one. Since we
 286          * just follow what already exists and do not introduce new
 287          * uses or names we don't care who introduced a new name. */
 288
 289         static const char * const table[] = {
 290                 /* LSB defined facilities */
 291                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 292 #if defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
 293 #else
 294                 /* Due to unfortunate name selection in Mandriva,
 295                  * $network is provided by network-up which is ordered
 296                  * after network which actually starts interfaces.
 297                  * To break the loop, just ignore it */
 298                 "network",              SPECIAL_NETWORK_TARGET,
 299 #endif
 300                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 301                 "portmap",              SPECIAL_RPCBIND_TARGET,
 302                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 303                 "syslog",               SPECIAL_SYSLOG_TARGET,
 304                 "time",                 SPECIAL_TIME_SYNC_TARGET,
 305
 306                 /* common extensions */
 307                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 308                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 309                 "null",                 NULL,
 310
 311 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
 312                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 313 #endif
 314
 315 #ifdef TARGET_FEDORA
 316                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 317                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 318                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 319 #endif
 320
 321 #ifdef TARGET_SUSE
 322                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 323 #endif
 324         };
 325
 326         unsigned i;
 327         char *r;
 328         const char *n;
 329
 330         assert(name);
 331         assert(_r);
 332
 333         n = *name == '$' ? name + 1 : name;
 334
 335         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 336
 337                 if (!streq(table[i], n))
 338                         continue;
 339
 340                 if (!table[i+1])
 341                         return 0;
 342
 343                 if (!(r = strdup(table[i+1])))
 344                         return -ENOMEM;
 345
 346                 goto finish;
 347         }
 348
 349         /* If we don't know this name, fallback heuristics to figure
 350          * out whether something is a target or a service alias. */
 351
 352         if (*name == '$') {
 353                 if (!unit_prefix_is_valid(n))
 354                         return -EINVAL;
 355
 356                 /* Facilities starting with $ are most likely targets */
 357                 r = unit_name_build(n, NULL, ".target");
 358         } else if (filename && streq(name, filename))
 359                 /* Names equaling the file name of the services are redundant */
 360                 return 0;
 361         else
 362                 /* Everything else we assume to be normal service names */
 363                 r = sysv_translate_name(n);
 364
 365         if (!r)
 366                 return -ENOMEM;
 367
 368 finish:
 369         *_r = r;
 370
 371         return 1;
 372 }
 373
 374 static int sysv_fix_order(Service *s) {
 375         Unit *other;
 376         int r;
 377
 378         assert(s);
 379
 380         if (s->sysv_start_priority < 0)
 381                 return 0;
 382
 383         /* For each pair of services where at least one lacks a LSB
 384          * header, we use the start priority value to order things. */
 385
 386         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
 387                 Service *t;
 388                 UnitDependency d;
 389                 bool special_s, special_t;
 390
 391                 t = SERVICE(other);
 392
 393                 if (s == t)
 394                         continue;
 395
 396                 if (UNIT(t)->load_state != UNIT_LOADED)
 397                         continue;
 398
 399                 if (t->sysv_start_priority < 0)
 400                         continue;
 401
 402                 /* If both units have modern headers we don't care
 403                  * about the priorities */
 404                 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
 405                     (UNIT(t)->fragment_path || t->sysv_has_lsb))
 406                         continue;
 407
 408                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 409                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 410
 411                 if (special_t && !special_s)
 412                         d = UNIT_AFTER;
 413                 else if (special_s && !special_t)
 414                         d = UNIT_BEFORE;
 415                 else if (t->sysv_start_priority < s->sysv_start_priority)
 416                         d = UNIT_AFTER;
 417                 else if (t->sysv_start_priority > s->sysv_start_priority)
 418                         d = UNIT_BEFORE;
 419                 else
 420                         continue;
 421
 422                 /* FIXME: Maybe we should compare the name here lexicographically? */
 423
 424                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 425                         return r;
 426         }
 427
 428         return 0;
 429 }
 430
 431 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 432         ExecCommand *c;
 433
 434         if (!(c = new0(ExecCommand, 1)))
 435                 return NULL;
 436
 437         if (!(c->path = strdup(path))) {
 438                 free(c);
 439                 return NULL;
 440         }
 441
 442         if (!(c->argv = strv_new(path, arg1, NULL))) {
 443                 free(c->path);
 444                 free(c);
 445                 return NULL;
 446         }
 447
 448         return c;
 449 }
 450
 451 static int sysv_exec_commands(Service *s) {
 452         ExecCommand *c;
 453
 454         assert(s);
 455         assert(s->sysv_path);
 456
 457         if (!(c = exec_command_new(s->sysv_path, "start")))
 458                 return -ENOMEM;
 459         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 460
 461         if (!(c = exec_command_new(s->sysv_path, "stop")))
 462                 return -ENOMEM;
 463         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 464
 465         if (!(c = exec_command_new(s->sysv_path, "reload")))
 466                 return -ENOMEM;
 467         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 468
 469         return 0;
 470 }
 471
 472 static int service_load_sysv_path(Service *s, const char *path) {
 473         FILE *f;
 474         Unit *u;
 475         unsigned line = 0;
 476         int r;
 477         enum {
 478                 NORMAL,
 479                 DESCRIPTION,
 480                 LSB,
 481                 LSB_DESCRIPTION
 482         } state = NORMAL;
 483         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 484         struct stat st;
 485
 486         assert(s);
 487         assert(path);
 488
 489         u = UNIT(s);
 490
 491         if (!(f = fopen(path, "re"))) {
 492                 r = errno == ENOENT ? 0 : -errno;
 493                 goto finish;
 494         }
 495
 496         zero(st);
 497         if (fstat(fileno(f), &st) < 0) {
 498                 r = -errno;
 499                 goto finish;
 500         }
 501
 502         free(s->sysv_path);
 503         if (!(s->sysv_path = strdup(path))) {
 504                 r = -ENOMEM;
 505                 goto finish;
 506         }
 507
 508         s->sysv_mtime = timespec_load(&st.st_mtim);
 509
 510         if (null_or_empty(&st)) {
 511                 u->load_state = UNIT_MASKED;
 512                 r = 0;
 513                 goto finish;
 514         }
 515
 516         while (!feof(f)) {
 517                 char l[LINE_MAX], *t;
 518
 519                 if (!fgets(l, sizeof(l), f)) {
 520                         if (feof(f))
 521                                 break;
 522
 523                         r = -errno;
 524                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 525                         goto finish;
 526                 }
 527
 528                 line++;
 529
 530                 t = strstrip(l);
 531                 if (*t != '#')
 532                         continue;
 533
 534                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 535                         state = LSB;
 536                         s->sysv_has_lsb = true;
 537                         continue;
 538                 }
 539
 540                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 541                         state = NORMAL;
 542                         continue;
 543                 }
 544
 545                 t++;
 546                 t += strspn(t, WHITESPACE);
 547
 548                 if (state == NORMAL) {
 549
 550                         /* Try to parse Red Hat style chkconfig headers */
 551
 552                         if (startswith_no_case(t, "chkconfig:")) {
 553                                 int start_priority;
 554                                 char runlevels[16], *k;
 555
 556                                 state = NORMAL;
 557
 558                                 if (sscanf(t+10, "%15s %i %*i",
 559                                            runlevels,
 560                                            &start_priority) != 2) {
 561
 562                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 563                                         continue;
 564                                 }
 565
 566                                 /* A start priority gathered from the
 567                                  * symlink farms is preferred over the
 568                                  * data from the LSB header. */
 569                                 if (start_priority < 0 || start_priority > 99)
 570                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 571                                 else
 572                                         s->sysv_start_priority = start_priority;
 573
 574                                 char_array_0(runlevels);
 575                                 k = delete_chars(runlevels, WHITESPACE "-");
 576
 577                                 if (k[0]) {
 578                                         char *d;
 579
 580                                         if (!(d = strdup(k))) {
 581                                                 r = -ENOMEM;
 582                                                 goto finish;
 583                                         }
 584
 585                                         free(s->sysv_runlevels);
 586                                         s->sysv_runlevels = d;
 587                                 }
 588
 589                         } else if (startswith_no_case(t, "description:")) {
 590
 591                                 size_t k = strlen(t);
 592                                 char *d;
 593                                 const char *j;
 594
 595                                 if (t[k-1] == '\\') {
 596                                         state = DESCRIPTION;
 597                                         t[k-1] = 0;
 598                                 }
 599
 600                                 if ((j = strstrip(t+12)) && *j) {
 601                                         if (!(d = strdup(j))) {
 602                                                 r = -ENOMEM;
 603                                                 goto finish;
 604                                         }
 605                                 } else
 606                                         d = NULL;
 607
 608                                 free(chkconfig_description);
 609                                 chkconfig_description = d;
 610
 611                         } else if (startswith_no_case(t, "pidfile:")) {
 612
 613                                 char *fn;
 614
 615                                 state = NORMAL;
 616
 617                                 fn = strstrip(t+8);
 618                                 if (!path_is_absolute(fn)) {
 619                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 620                                         continue;
 621                                 }
 622
 623                                 if (!(fn = strdup(fn))) {
 624                                         r = -ENOMEM;
 625                                         goto finish;
 626                                 }
 627
 628                                 free(s->pid_file);
 629                                 s->pid_file = fn;
 630                         }
 631
 632                 } else if (state == DESCRIPTION) {
 633
 634                         /* Try to parse Red Hat style description
 635                          * continuation */
 636
 637                         size_t k = strlen(t);
 638                         char *j;
 639
 640                         if (t[k-1] == '\\')
 641                                 t[k-1] = 0;
 642                         else
 643                                 state = NORMAL;
 644
 645                         if ((j = strstrip(t)) && *j) {
 646                                 char *d = NULL;
 647
 648                                 if (chkconfig_description)
 649                                         d = join(chkconfig_description, " ", j, NULL);
 650                                 else
 651                                         d = strdup(j);
 652
 653                                 if (!d) {
 654                                         r = -ENOMEM;
 655                                         goto finish;
 656                                 }
 657
 658                                 free(chkconfig_description);
 659                                 chkconfig_description = d;
 660                         }
 661
 662                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 663
 664                         if (startswith_no_case(t, "Provides:")) {
 665                                 char *i, *w;
 666                                 size_t z;
 667
 668                                 state = LSB;
 669
 670                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 671                                         char *n, *m;
 672
 673                                         if (!(n = strndup(w, z))) {
 674                                                 r = -ENOMEM;
 675                                                 goto finish;
 676                                         }
 677
 678                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 679                                         free(n);
 680
 681                                         if (r < 0)
 682                                                 goto finish;
 683
 684                                         if (r == 0)
 685                                                 continue;
 686
 687                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 688                                                 r = unit_add_name(u, m);
 689                                         else
 690                                                 /* NB: SysV targets
 691                                                  * which are provided
 692                                                  * by a service are
 693                                                  * pulled in by the
 694                                                  * services, as an
 695                                                  * indication that the
 696                                                  * generic service is
 697                                                  * now available. This
 698                                                  * is strictly
 699                                                  * one-way. The
 700                                                  * targets do NOT pull
 701                                                  * in the SysV
 702                                                  * services! */
 703                                                 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
 704
 705                                         if (r < 0)
 706                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 707
 708                                         free(m);
 709                                 }
 710
 711                         } else if (startswith_no_case(t, "Required-Start:") ||
 712                                    startswith_no_case(t, "Should-Start:") ||
 713                                    startswith_no_case(t, "X-Start-Before:") ||
 714                                    startswith_no_case(t, "X-Start-After:")) {
 715                                 char *i, *w;
 716                                 size_t z;
 717
 718                                 state = LSB;
 719
 720                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 721                                         char *n, *m;
 722
 723                                         if (!(n = strndup(w, z))) {
 724                                                 r = -ENOMEM;
 725                                                 goto finish;
 726                                         }
 727
 728                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 729
 730                                         if (r < 0) {
 731                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
 732                                                 free(n);
 733                                                 continue;
 734                                         }
 735
 736                                         free(n);
 737
 738                                         if (r == 0)
 739                                                 continue;
 740
 741                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 742
 743                                         if (r < 0)
 744                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 745
 746                                         free(m);
 747                                 }
 748                         } else if (startswith_no_case(t, "Default-Start:")) {
 749                                 char *k, *d;
 750
 751                                 state = LSB;
 752
 753                                 k = delete_chars(t+14, WHITESPACE "-");
 754
 755                                 if (k[0] != 0) {
 756                                         if (!(d = strdup(k))) {
 757                                                 r = -ENOMEM;
 758                                                 goto finish;
 759                                         }
 760
 761                                         free(s->sysv_runlevels);
 762                                         s->sysv_runlevels = d;
 763                                 }
 764
 765                         } else if (startswith_no_case(t, "Description:")) {
 766                                 char *d, *j;
 767
 768                                 state = LSB_DESCRIPTION;
 769
 770                                 if ((j = strstrip(t+12)) && *j) {
 771                                         if (!(d = strdup(j))) {
 772                                                 r = -ENOMEM;
 773                                                 goto finish;
 774                                         }
 775                                 } else
 776                                         d = NULL;
 777
 778                                 free(long_description);
 779                                 long_description = d;
 780
 781                         } else if (startswith_no_case(t, "Short-Description:")) {
 782                                 char *d, *j;
 783
 784                                 state = LSB;
 785
 786                                 if ((j = strstrip(t+18)) && *j) {
 787                                         if (!(d = strdup(j))) {
 788                                                 r = -ENOMEM;
 789                                                 goto finish;
 790                                         }
 791                                 } else
 792                                         d = NULL;
 793
 794                                 free(short_description);
 795                                 short_description = d;
 796
 797                         } else if (state == LSB_DESCRIPTION) {
 798
 799                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 800                                         char *j;
 801
 802                                         if ((j = strstrip(t)) && *j) {
 803                                                 char *d = NULL;
 804
 805                                                 if (long_description)
 806                                                         d = join(long_description, " ", t, NULL);
 807                                                 else
 808                                                         d = strdup(j);
 809
 810                                                 if (!d) {
 811                                                         r = -ENOMEM;
 812                                                         goto finish;
 813                                                 }
 814
 815                                                 free(long_description);
 816                                                 long_description = d;
 817                                         }
 818
 819                                 } else
 820                                         state = LSB;
 821                         }
 822                 }
 823         }
 824
 825         if ((r = sysv_exec_commands(s)) < 0)
 826                 goto finish;
 827         if (s->sysv_runlevels &&
 828             chars_intersect(RUNLEVELS_BOOT, s->sysv_runlevels) &&
 829             chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 830                 /* Service has both boot and "up" runlevels
 831                    configured.  Kill the "up" ones. */
 832                 delete_chars(s->sysv_runlevels, RUNLEVELS_UP);
 833         }
 834
 835         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 836                 /* If there a runlevels configured for this service
 837                  * but none of the standard ones, then we assume this
 838                  * is some special kind of service (which might be
 839                  * needed for early boot) and don't create any links
 840                  * to it. */
 841
 842                 UNIT(s)->default_dependencies = false;
 843
 844                 /* Don't timeout special services during boot (like fsck) */
 845                 s->timeout_usec = 0;
 846         } else
 847                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 848
 849         /* Special setting for all SysV services */
 850         s->type = SERVICE_FORKING;
 851         s->remain_after_exit = !s->pid_file;
 852         s->guess_main_pid = false;
 853         s->restart = SERVICE_RESTART_NO;
 854
 855         if (UNIT(s)->manager->sysv_console)
 856                 s->exec_context.std_output = EXEC_OUTPUT_JOURNAL_AND_CONSOLE;
 857
 858         s->exec_context.kill_mode = KILL_PROCESS;
 859
 860         /* We use the long description only if
 861          * no short description is set. */
 862
 863         if (short_description)
 864                 description = short_description;
 865         else if (chkconfig_description)
 866                 description = chkconfig_description;
 867         else if (long_description)
 868                 description = long_description;
 869         else
 870                 description = NULL;
 871
 872         if (description) {
 873                 char *d;
 874
 875                 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
 876                         r = -ENOMEM;
 877                         goto finish;
 878                 }
 879
 880                 u->description = d;
 881         }
 882
 883         /* The priority that has been set in /etc/rcN.d/ hierarchies
 884          * takes precedence over what is stored as default in the LSB
 885          * header */
 886         if (s->sysv_start_priority_from_rcnd >= 0)
 887                 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
 888
 889         u->load_state = UNIT_LOADED;
 890         r = 0;
 891
 892 finish:
 893
 894         if (f)
 895                 fclose(f);
 896
 897         free(short_description);
 898         free(long_description);
 899         free(chkconfig_description);
 900
 901         return r;
 902 }
 903
 904 static int service_load_sysv_name(Service *s, const char *name) {
 905         char **p;
 906
 907         assert(s);
 908         assert(name);
 909
 910         /* For SysV services we strip the boot.*, rc.* and *.sh
 911          * prefixes/suffixes. */
 912 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
 913         if (endswith(name, ".sh.service"))
 914                 return -ENOENT;
 915 #endif
 916
 917 #ifdef TARGET_SUSE
 918         if (startswith(name, "boot."))
 919                 return -ENOENT;
 920 #endif
 921
 922 #ifdef TARGET_FRUGALWARE
 923         if (startswith(name, "rc."))
 924                 return -ENOENT;
 925 #endif
 926
 927         STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
 928                 char *path;
 929                 int r;
 930
 931                 path = join(*p, "/", name, NULL);
 932                 if (!path)
 933                         return -ENOMEM;
 934
 935                 assert(endswith(path, ".service"));
 936                 path[strlen(path)-8] = 0;
 937
 938                 r = service_load_sysv_path(s, path);
 939
 940 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
 941                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
 942                         /* Try Debian style *.sh source'able init scripts */
 943                         strcat(path, ".sh");
 944                         r = service_load_sysv_path(s, path);
 945                 }
 946 #endif
 947                 free(path);
 948
 949 #ifdef TARGET_SUSE
 950                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
 951                         /* Try SUSE style boot.* init scripts */
 952
 953                         path = join(*p, "/boot.", name, NULL);
 954                         if (!path)
 955                                 return -ENOMEM;
 956
 957                         /* Drop .service suffix */
 958                         path[strlen(path)-8] = 0;
 959                         r = service_load_sysv_path(s, path);
 960                         free(path);
 961                 }
 962 #endif
 963
 964 #ifdef TARGET_FRUGALWARE
 965                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
 966                         /* Try Frugalware style rc.* init scripts */
 967
 968                         path = join(*p, "/rc.", name, NULL);
 969                         if (!path)
 970                                 return -ENOMEM;
 971
 972                         /* Drop .service suffix */
 973                         path[strlen(path)-8] = 0;
 974                         r = service_load_sysv_path(s, path);
 975                         free(path);
 976                 }
 977 #endif
 978
 979                 if (r < 0)
 980                         return r;
 981
 982                 if ((UNIT(s)->load_state != UNIT_STUB))
 983                         break;
 984         }
 985
 986         return 0;
 987 }
 988
 989 static int service_load_sysv(Service *s) {
 990         const char *t;
 991         Iterator i;
 992         int r;
 993
 994         assert(s);
 995
 996         /* Load service data from SysV init scripts, preferably with
 997          * LSB headers ... */
 998
 999         if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1000                 return 0;
1001
1002         if ((t = UNIT(s)->id))
1003                 if ((r = service_load_sysv_name(s, t)) < 0)
1004                         return r;
1005
1006         if (UNIT(s)->load_state == UNIT_STUB)
1007                 SET_FOREACH(t, UNIT(s)->names, i) {
1008                         if (t == UNIT(s)->id)
1009                                 continue;
1010
1011                         if ((r = service_load_sysv_name(s, t)) < 0)
1012                                 return r;
1013
1014                         if (UNIT(s)->load_state != UNIT_STUB)
1015                                 break;
1016                 }
1017
1018         return 0;
1019 }
1020 #endif
1021
1022 static int fsck_fix_order(Service *s) {
1023         Unit *other;
1024         int r;
1025
1026         assert(s);
1027
1028         if (s->fsck_passno <= 0)
1029                 return 0;
1030
1031         /* For each pair of services where both have an fsck priority
1032          * we order things based on it. */
1033
1034         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
1035                 Service *t;
1036                 UnitDependency d;
1037
1038                 t = SERVICE(other);
1039
1040                 if (s == t)
1041                         continue;
1042
1043                 if (UNIT(t)->load_state != UNIT_LOADED)
1044                         continue;
1045
1046                 if (t->fsck_passno <= 0)
1047                         continue;
1048
1049                 if (t->fsck_passno < s->fsck_passno)
1050                         d = UNIT_AFTER;
1051                 else if (t->fsck_passno > s->fsck_passno)
1052                         d = UNIT_BEFORE;
1053                 else
1054                         continue;
1055
1056                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1057                         return r;
1058         }
1059
1060         return 0;
1061 }
1062
1063 static int service_verify(Service *s) {
1064         assert(s);
1065
1066         if (UNIT(s)->load_state != UNIT_LOADED)
1067                 return 0;
1068
1069         if (!s->exec_command[SERVICE_EXEC_START]) {
1070                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1071                 return -EINVAL;
1072         }
1073
1074         if (s->type != SERVICE_ONESHOT &&
1075             s->exec_command[SERVICE_EXEC_START]->command_next) {
1076                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1077                 return -EINVAL;
1078         }
1079
1080         if (s->type == SERVICE_ONESHOT &&
1081             s->exec_command[SERVICE_EXEC_RELOAD]) {
1082                 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1083                 return -EINVAL;
1084         }
1085
1086         if (s->type == SERVICE_DBUS && !s->bus_name) {
1087                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1088                 return -EINVAL;
1089         }
1090
1091         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1092                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1093                 return -EINVAL;
1094         }
1095
1096         return 0;
1097 }
1098
1099 static int service_add_default_dependencies(Service *s) {
1100         int r;
1101
1102         assert(s);
1103
1104         /* Add a number of automatic dependencies useful for the
1105          * majority of services. */
1106
1107         /* First, pull in base system */
1108         if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
1109
1110                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1111                         return r;
1112
1113         } else if (UNIT(s)->manager->running_as == MANAGER_USER) {
1114
1115                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1116                         return r;
1117         }
1118
1119         /* Second, activate normal shutdown */
1120         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1121 }
1122
1123 static void service_fix_output(Service *s) {
1124         assert(s);
1125
1126         /* If nothing has been explicitly configured, patch default
1127          * output in. If input is socket/tty we avoid this however,
1128          * since in that case we want output to default to the same
1129          * place as we read input from. */
1130
1131         if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1132             s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1133             s->exec_context.std_input == EXEC_INPUT_NULL)
1134                 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1135
1136         if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1137             s->exec_context.std_input == EXEC_INPUT_NULL)
1138                 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1139 }
1140
1141 static int service_load(Unit *u) {
1142         int r;
1143         Service *s = SERVICE(u);
1144
1145         assert(s);
1146
1147         /* Load a .service file */
1148         if ((r = unit_load_fragment(u)) < 0)
1149                 return r;
1150
1151 #ifdef HAVE_SYSV_COMPAT
1152         /* Load a classic init script as a fallback, if we couldn't find anything */
1153         if (u->load_state == UNIT_STUB)
1154                 if ((r = service_load_sysv(s)) < 0)
1155                         return r;
1156 #endif
1157
1158         /* Still nothing found? Then let's give up */
1159         if (u->load_state == UNIT_STUB)
1160                 return -ENOENT;
1161
1162         /* We were able to load something, then let's add in the
1163          * dropin directories. */
1164         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1165                 return r;
1166
1167         /* This is a new unit? Then let's add in some extras */
1168         if (u->load_state == UNIT_LOADED) {
1169                 service_fix_output(s);
1170
1171                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1172                         return r;
1173
1174                 if ((r = unit_add_default_cgroups(u)) < 0)
1175                         return r;
1176
1177 #ifdef HAVE_SYSV_COMPAT
1178                 if ((r = sysv_fix_order(s)) < 0)
1179                         return r;
1180 #endif
1181
1182                 if ((r = fsck_fix_order(s)) < 0)
1183                         return r;
1184
1185                 if (s->bus_name)
1186                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1187                                 return r;
1188
1189                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1190                         s->notify_access = NOTIFY_MAIN;
1191
1192                 if (s->type == SERVICE_DBUS || s->bus_name)
1193                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true)) < 0)
1194                                 return r;
1195
1196                 if (UNIT(s)->default_dependencies)
1197                         if ((r = service_add_default_dependencies(s)) < 0)
1198                                 return r;
1199         }
1200
1201         return service_verify(s);
1202 }
1203
1204 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1205
1206         ServiceExecCommand c;
1207         Service *s = SERVICE(u);
1208         const char *prefix2;
1209         char *p2;
1210
1211         assert(s);
1212
1213         p2 = strappend(prefix, "\t");
1214         prefix2 = p2 ? p2 : prefix;
1215
1216         fprintf(f,
1217                 "%sService State: %s\n"
1218                 "%sPermissionsStartOnly: %s\n"
1219                 "%sRootDirectoryStartOnly: %s\n"
1220                 "%sRemainAfterExit: %s\n"
1221                 "%sGuessMainPID: %s\n"
1222                 "%sType: %s\n"
1223                 "%sRestart: %s\n"
1224                 "%sNotifyAccess: %s\n",
1225                 prefix, service_state_to_string(s->state),
1226                 prefix, yes_no(s->permissions_start_only),
1227                 prefix, yes_no(s->root_directory_start_only),
1228                 prefix, yes_no(s->remain_after_exit),
1229                 prefix, yes_no(s->guess_main_pid),
1230                 prefix, service_type_to_string(s->type),
1231                 prefix, service_restart_to_string(s->restart),
1232                 prefix, notify_access_to_string(s->notify_access));
1233
1234         if (s->control_pid > 0)
1235                 fprintf(f,
1236                         "%sControl PID: %lu\n",
1237                         prefix, (unsigned long) s->control_pid);
1238
1239         if (s->main_pid > 0)
1240                 fprintf(f,
1241                         "%sMain PID: %lu\n"
1242                         "%sMain PID Known: %s\n"
1243                         "%sMain PID Alien: %s\n",
1244                         prefix, (unsigned long) s->main_pid,
1245                         prefix, yes_no(s->main_pid_known),
1246                         prefix, yes_no(s->main_pid_alien));
1247
1248         if (s->pid_file)
1249                 fprintf(f,
1250                         "%sPIDFile: %s\n",
1251                         prefix, s->pid_file);
1252
1253         if (s->bus_name)
1254                 fprintf(f,
1255                         "%sBusName: %s\n"
1256                         "%sBus Name Good: %s\n",
1257                         prefix, s->bus_name,
1258                         prefix, yes_no(s->bus_name_good));
1259
1260         exec_context_dump(&s->exec_context, f, prefix);
1261
1262         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1263
1264                 if (!s->exec_command[c])
1265                         continue;
1266
1267                 fprintf(f, "%s-> %s:\n",
1268                         prefix, service_exec_command_to_string(c));
1269
1270                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1271         }
1272
1273 #ifdef HAVE_SYSV_COMPAT
1274         if (s->sysv_path)
1275                 fprintf(f,
1276                         "%sSysV Init Script Path: %s\n"
1277                         "%sSysV Init Script has LSB Header: %s\n"
1278                         "%sSysVEnabled: %s\n",
1279                         prefix, s->sysv_path,
1280                         prefix, yes_no(s->sysv_has_lsb),
1281                         prefix, yes_no(s->sysv_enabled));
1282
1283         if (s->sysv_start_priority >= 0)
1284                 fprintf(f,
1285                         "%sSysVStartPriority: %i\n",
1286                         prefix, s->sysv_start_priority);
1287
1288         if (s->sysv_runlevels)
1289                 fprintf(f, "%sSysVRunLevels: %s\n",
1290                         prefix, s->sysv_runlevels);
1291 #endif
1292
1293         if (s->fsck_passno > 0)
1294                 fprintf(f,
1295                         "%sFsckPassNo: %i\n",
1296                         prefix, s->fsck_passno);
1297
1298         if (s->status_text)
1299                 fprintf(f, "%sStatus Text: %s\n",
1300                         prefix, s->status_text);
1301
1302         free(p2);
1303 }
1304
1305 static int service_load_pid_file(Service *s, bool may_warn) {
1306         char *k;
1307         int r;
1308         pid_t pid;
1309
1310         assert(s);
1311
1312         if (!s->pid_file)
1313                 return -ENOENT;
1314
1315         if ((r = read_one_line_file(s->pid_file, &k)) < 0) {
1316                 if (may_warn)
1317                         log_info("PID file %s not readable (yet?) after %s.",
1318                                  s->pid_file, service_state_to_string(s->state));
1319                 return r;
1320         }
1321
1322         r = parse_pid(k, &pid);
1323         free(k);
1324
1325         if (r < 0)
1326                 return r;
1327
1328         if (kill(pid, 0) < 0 && errno != EPERM) {
1329                 if (may_warn)
1330                         log_info("PID %lu read from file %s does not exist.",
1331                                  (unsigned long) pid, s->pid_file);
1332                 return -ESRCH;
1333         }
1334
1335         if (s->main_pid_known) {
1336                 if (pid == s->main_pid)
1337                         return 0;
1338
1339                 log_debug("Main PID changing: %lu -> %lu",
1340                           (unsigned long) s->main_pid, (unsigned long) pid);
1341                 service_unwatch_main_pid(s);
1342                 s->main_pid_known = false;
1343         } else
1344                 log_debug("Main PID loaded: %lu", (unsigned long) pid);
1345
1346         if ((r = service_set_main_pid(s, pid)) < 0)
1347                 return r;
1348
1349         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1350                 /* FIXME: we need to do something here */
1351                 return r;
1352
1353         return 0;
1354 }
1355
1356 static int service_search_main_pid(Service *s) {
1357         pid_t pid;
1358         int r;
1359
1360         assert(s);
1361
1362         /* If we know it anyway, don't ever fallback to unreliable
1363          * heuristics */
1364         if (s->main_pid_known)
1365                 return 0;
1366
1367         if (!s->guess_main_pid)
1368                 return 0;
1369
1370         assert(s->main_pid <= 0);
1371
1372         if ((pid = cgroup_bonding_search_main_pid_list(UNIT(s)->cgroup_bondings)) <= 0)
1373                 return -ENOENT;
1374
1375         log_debug("Main PID guessed: %lu", (unsigned long) pid);
1376         if ((r = service_set_main_pid(s, pid)) < 0)
1377                 return r;
1378
1379         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1380                 /* FIXME: we need to do something here */
1381                 return r;
1382
1383         return 0;
1384 }
1385
1386 static void service_notify_sockets_dead(Service *s) {
1387         Iterator i;
1388         Unit *u;
1389
1390         assert(s);
1391
1392         /* Notifies all our sockets when we die */
1393
1394         if (s->socket_fd >= 0)
1395                 return;
1396
1397         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i)
1398                 if (u->type == UNIT_SOCKET)
1399                         socket_notify_service_dead(SOCKET(u));
1400
1401         return;
1402 }
1403
1404 static void service_set_state(Service *s, ServiceState state) {
1405         ServiceState old_state;
1406         assert(s);
1407
1408         old_state = s->state;
1409         s->state = state;
1410
1411         service_unwatch_pid_file(s);
1412
1413         if (state != SERVICE_START_PRE &&
1414             state != SERVICE_START &&
1415             state != SERVICE_START_POST &&
1416             state != SERVICE_RELOAD &&
1417             state != SERVICE_STOP &&
1418             state != SERVICE_STOP_SIGTERM &&
1419             state != SERVICE_STOP_SIGKILL &&
1420             state != SERVICE_STOP_POST &&
1421             state != SERVICE_FINAL_SIGTERM &&
1422             state != SERVICE_FINAL_SIGKILL &&
1423             state != SERVICE_AUTO_RESTART)
1424                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1425
1426         if (state != SERVICE_START &&
1427             state != SERVICE_START_POST &&
1428             state != SERVICE_RUNNING &&
1429             state != SERVICE_RELOAD &&
1430             state != SERVICE_STOP &&
1431             state != SERVICE_STOP_SIGTERM &&
1432             state != SERVICE_STOP_SIGKILL) {
1433                 service_unwatch_main_pid(s);
1434                 s->main_command = NULL;
1435         }
1436
1437         if (state != SERVICE_START_PRE &&
1438             state != SERVICE_START &&
1439             state != SERVICE_START_POST &&
1440             state != SERVICE_RELOAD &&
1441             state != SERVICE_STOP &&
1442             state != SERVICE_STOP_SIGTERM &&
1443             state != SERVICE_STOP_SIGKILL &&
1444             state != SERVICE_STOP_POST &&
1445             state != SERVICE_FINAL_SIGTERM &&
1446             state != SERVICE_FINAL_SIGKILL) {
1447                 service_unwatch_control_pid(s);
1448                 s->control_command = NULL;
1449                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1450         }
1451
1452         if (state == SERVICE_DEAD ||
1453             state == SERVICE_STOP ||
1454             state == SERVICE_STOP_SIGTERM ||
1455             state == SERVICE_STOP_SIGKILL ||
1456             state == SERVICE_STOP_POST ||
1457             state == SERVICE_FINAL_SIGTERM ||
1458             state == SERVICE_FINAL_SIGKILL ||
1459             state == SERVICE_FAILED ||
1460             state == SERVICE_AUTO_RESTART)
1461                 service_notify_sockets_dead(s);
1462
1463         if (state != SERVICE_START_PRE &&
1464             state != SERVICE_START &&
1465             state != SERVICE_START_POST &&
1466             state != SERVICE_RUNNING &&
1467             state != SERVICE_RELOAD &&
1468             state != SERVICE_STOP &&
1469             state != SERVICE_STOP_SIGTERM &&
1470             state != SERVICE_STOP_SIGKILL &&
1471             state != SERVICE_STOP_POST &&
1472             state != SERVICE_FINAL_SIGTERM &&
1473             state != SERVICE_FINAL_SIGKILL &&
1474             !(state == SERVICE_DEAD && UNIT(s)->job)) {
1475                 service_close_socket_fd(s);
1476                 service_connection_unref(s);
1477         }
1478
1479         /* For the inactive states unit_notify() will trim the cgroup,
1480          * but for exit we have to do that ourselves... */
1481         if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1482                 cgroup_bonding_trim_list(UNIT(s)->cgroup_bondings, true);
1483
1484         if (old_state != state)
1485                 log_debug("%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
1486
1487         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], !s->reload_failure);
1488         s->reload_failure = false;
1489 }
1490
1491 static int service_coldplug(Unit *u) {
1492         Service *s = SERVICE(u);
1493         int r;
1494
1495         assert(s);
1496         assert(s->state == SERVICE_DEAD);
1497
1498         if (s->deserialized_state != s->state) {
1499
1500                 if (s->deserialized_state == SERVICE_START_PRE ||
1501                     s->deserialized_state == SERVICE_START ||
1502                     s->deserialized_state == SERVICE_START_POST ||
1503                     s->deserialized_state == SERVICE_RELOAD ||
1504                     s->deserialized_state == SERVICE_STOP ||
1505                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1506                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1507                     s->deserialized_state == SERVICE_STOP_POST ||
1508                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1509                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1510                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1511
1512                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1513                                 usec_t k;
1514
1515                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1516
1517                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1518                                         return r;
1519                         }
1520                 }
1521
1522                 if ((s->deserialized_state == SERVICE_START &&
1523                      (s->type == SERVICE_FORKING ||
1524                       s->type == SERVICE_DBUS ||
1525                       s->type == SERVICE_ONESHOT ||
1526                       s->type == SERVICE_NOTIFY)) ||
1527                     s->deserialized_state == SERVICE_START_POST ||
1528                     s->deserialized_state == SERVICE_RUNNING ||
1529                     s->deserialized_state == SERVICE_RELOAD ||
1530                     s->deserialized_state == SERVICE_STOP ||
1531                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1532                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1533                         if (s->main_pid > 0)
1534                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1535                                         return r;
1536
1537                 if (s->deserialized_state == SERVICE_START_PRE ||
1538                     s->deserialized_state == SERVICE_START ||
1539                     s->deserialized_state == SERVICE_START_POST ||
1540                     s->deserialized_state == SERVICE_RELOAD ||
1541                     s->deserialized_state == SERVICE_STOP ||
1542                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1543                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1544                     s->deserialized_state == SERVICE_STOP_POST ||
1545                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1546                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1547                         if (s->control_pid > 0)
1548                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1549                                         return r;
1550
1551                 service_set_state(s, s->deserialized_state);
1552         }
1553
1554         return 0;
1555 }
1556
1557 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1558         Iterator i;
1559         int r;
1560         int *rfds = NULL;
1561         unsigned rn_fds = 0;
1562         Unit *u;
1563
1564         assert(s);
1565         assert(fds);
1566         assert(n_fds);
1567
1568         if (s->socket_fd >= 0)
1569                 return 0;
1570
1571         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1572                 int *cfds;
1573                 unsigned cn_fds;
1574                 Socket *sock;
1575
1576                 if (u->type != UNIT_SOCKET)
1577                         continue;
1578
1579                 sock = SOCKET(u);
1580
1581                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1582                         goto fail;
1583
1584                 if (!cfds)
1585                         continue;
1586
1587                 if (!rfds) {
1588                         rfds = cfds;
1589                         rn_fds = cn_fds;
1590                 } else {
1591                         int *t;
1592
1593                         if (!(t = new(int, rn_fds+cn_fds))) {
1594                                 free(cfds);
1595                                 r = -ENOMEM;
1596                                 goto fail;
1597                         }
1598
1599                         memcpy(t, rfds, rn_fds * sizeof(int));
1600                         memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1601                         free(rfds);
1602                         free(cfds);
1603
1604                         rfds = t;
1605                         rn_fds = rn_fds+cn_fds;
1606                 }
1607         }
1608
1609         *fds = rfds;
1610         *n_fds = rn_fds;
1611
1612         return 0;
1613
1614 fail:
1615         free(rfds);
1616
1617         return r;
1618 }
1619
1620 static int service_spawn(
1621                 Service *s,
1622                 ExecCommand *c,
1623                 bool timeout,
1624                 bool pass_fds,
1625                 bool apply_permissions,
1626                 bool apply_chroot,
1627                 bool apply_tty_stdin,
1628                 bool set_notify_socket,
1629                 pid_t *_pid) {
1630
1631         pid_t pid;
1632         int r;
1633         int *fds = NULL, *fdsbuf = NULL;
1634         unsigned n_fds = 0, n_env = 0;
1635         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1636
1637         assert(s);
1638         assert(c);
1639         assert(_pid);
1640
1641         if (pass_fds ||
1642             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1643             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1644             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1645
1646                 if (s->socket_fd >= 0) {
1647                         fds = &s->socket_fd;
1648                         n_fds = 1;
1649                 } else {
1650                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1651                                 goto fail;
1652
1653                         fds = fdsbuf;
1654                 }
1655         }
1656
1657         if (timeout && s->timeout_usec) {
1658                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1659                         goto fail;
1660         } else
1661                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1662
1663         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1664                 r = -ENOMEM;
1665                 goto fail;
1666         }
1667
1668         if (!(our_env = new0(char*, 4))) {
1669                 r = -ENOMEM;
1670                 goto fail;
1671         }
1672
1673         if (set_notify_socket)
1674                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1675                         r = -ENOMEM;
1676                         goto fail;
1677                 }
1678
1679         if (s->main_pid > 0)
1680                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1681                         r = -ENOMEM;
1682                         goto fail;
1683                 }
1684
1685         if (!(final_env = strv_env_merge(2,
1686                                          UNIT(s)->manager->environment,
1687                                          our_env,
1688                                          NULL))) {
1689                 r = -ENOMEM;
1690                 goto fail;
1691         }
1692
1693         r = exec_spawn(c,
1694                        argv,
1695                        &s->exec_context,
1696                        fds, n_fds,
1697                        final_env,
1698                        apply_permissions,
1699                        apply_chroot,
1700                        apply_tty_stdin,
1701                        UNIT(s)->manager->confirm_spawn,
1702                        UNIT(s)->cgroup_bondings,
1703                        UNIT(s)->cgroup_attributes,
1704                        &pid);
1705
1706         if (r < 0)
1707                 goto fail;
1708
1709
1710         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1711                 /* FIXME: we need to do something here */
1712                 goto fail;
1713
1714         free(fdsbuf);
1715         strv_free(argv);
1716         strv_free(our_env);
1717         strv_free(final_env);
1718
1719         *_pid = pid;
1720
1721         return 0;
1722
1723 fail:
1724         free(fdsbuf);
1725         strv_free(argv);
1726         strv_free(our_env);
1727         strv_free(final_env);
1728
1729         if (timeout)
1730                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1731
1732         return r;
1733 }
1734
1735 static int main_pid_good(Service *s) {
1736         assert(s);
1737
1738         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1739          * don't know */
1740
1741         /* If we know the pid file, then lets just check if it is
1742          * still valid */
1743         if (s->main_pid_known) {
1744
1745                 /* If it's an alien child let's check if it is still
1746                  * alive ... */
1747                 if (s->main_pid_alien)
1748                         return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1749
1750                 /* .. otherwise assume we'll get a SIGCHLD for it,
1751                  * which we really should wait for to collect exit
1752                  * status and code */
1753                 return s->main_pid > 0;
1754         }
1755
1756         /* We don't know the pid */
1757         return -EAGAIN;
1758 }
1759
1760 static int control_pid_good(Service *s) {
1761         assert(s);
1762
1763         return s->control_pid > 0;
1764 }
1765
1766 static int cgroup_good(Service *s) {
1767         int r;
1768
1769         assert(s);
1770
1771         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->cgroup_bondings)) < 0)
1772                 return r;
1773
1774         return !r;
1775 }
1776
1777 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1778         int r;
1779         assert(s);
1780
1781         if (!success)
1782                 s->failure = true;
1783
1784         if (allow_restart &&
1785             !s->forbid_restart &&
1786             (s->restart == SERVICE_RESTART_ALWAYS ||
1787              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure) ||
1788              (s->restart == SERVICE_RESTART_ON_FAILURE && s->failure) ||
1789              (s->restart == SERVICE_RESTART_ON_ABORT && s->failure &&
1790               (s->main_exec_status.code == CLD_KILLED ||
1791                s->main_exec_status.code == CLD_DUMPED)))) {
1792
1793                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1794                         goto fail;
1795
1796                 service_set_state(s, SERVICE_AUTO_RESTART);
1797         } else
1798                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1799
1800         s->forbid_restart = false;
1801
1802         return;
1803
1804 fail:
1805         log_warning("%s failed to run install restart timer: %s", UNIT(s)->id, strerror(-r));
1806         service_enter_dead(s, false, false);
1807 }
1808
1809 static void service_enter_signal(Service *s, ServiceState state, bool success);
1810
1811 static void service_enter_stop_post(Service *s, bool success) {
1812         int r;
1813         assert(s);
1814
1815         if (!success)
1816                 s->failure = true;
1817
1818         service_unwatch_control_pid(s);
1819
1820         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1821                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1822
1823                 if ((r = service_spawn(s,
1824                                        s->control_command,
1825                                        true,
1826                                        false,
1827                                        !s->permissions_start_only,
1828                                        !s->root_directory_start_only,
1829                                        true,
1830                                        false,
1831                                        &s->control_pid)) < 0)
1832                         goto fail;
1833
1834
1835                 service_set_state(s, SERVICE_STOP_POST);
1836         } else
1837                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1838
1839         return;
1840
1841 fail:
1842         log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
1843         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1844 }
1845
1846 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1847         int r;
1848         Set *pid_set = NULL;
1849         bool wait_for_exit = false;
1850
1851         assert(s);
1852
1853         if (!success)
1854                 s->failure = true;
1855
1856         if (s->exec_context.kill_mode != KILL_NONE) {
1857                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1858
1859                 if (s->main_pid > 0) {
1860                         if (kill_and_sigcont(s->main_pid, sig) < 0 && errno != ESRCH)
1861                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1862                         else
1863                                 wait_for_exit = !s->main_pid_alien;
1864                 }
1865
1866                 if (s->control_pid > 0) {
1867                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1868                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1869                         else
1870                                 wait_for_exit = true;
1871                 }
1872
1873                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1874
1875                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1876                                 r = -ENOMEM;
1877                                 goto fail;
1878                         }
1879
1880                         /* Exclude the main/control pids from being killed via the cgroup */
1881                         if (s->main_pid > 0)
1882                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1883                                         goto fail;
1884
1885                         if (s->control_pid > 0)
1886                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1887                                         goto fail;
1888
1889                         if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 0) {
1890                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1891                                         log_warning("Failed to kill control group: %s", strerror(-r));
1892                         } else if (r > 0)
1893                                 wait_for_exit = true;
1894
1895                         set_free(pid_set);
1896                         pid_set = NULL;
1897                 }
1898         }
1899
1900         if (wait_for_exit) {
1901                 if (s->timeout_usec > 0)
1902                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1903                                 goto fail;
1904
1905                 service_set_state(s, state);
1906         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1907                 service_enter_stop_post(s, true);
1908         else
1909                 service_enter_dead(s, true, true);
1910
1911         return;
1912
1913 fail:
1914         log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1915
1916         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1917                 service_enter_stop_post(s, false);
1918         else
1919                 service_enter_dead(s, false, true);
1920
1921         if (pid_set)
1922                 set_free(pid_set);
1923 }
1924
1925 static void service_enter_stop(Service *s, bool success) {
1926         int r;
1927
1928         assert(s);
1929
1930         if (!success)
1931                 s->failure = true;
1932
1933         service_unwatch_control_pid(s);
1934
1935         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1936                 s->control_command_id = SERVICE_EXEC_STOP;
1937
1938                 if ((r = service_spawn(s,
1939                                        s->control_command,
1940                                        true,
1941                                        false,
1942                                        !s->permissions_start_only,
1943                                        !s->root_directory_start_only,
1944                                        false,
1945                                        false,
1946                                        &s->control_pid)) < 0)
1947                         goto fail;
1948
1949                 service_set_state(s, SERVICE_STOP);
1950         } else
1951                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1952
1953         return;
1954
1955 fail:
1956         log_warning("%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
1957         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1958 }
1959
1960 static void service_enter_running(Service *s, bool success) {
1961         int main_pid_ok, cgroup_ok;
1962         assert(s);
1963
1964         if (!success)
1965                 s->failure = true;
1966
1967         main_pid_ok = main_pid_good(s);
1968         cgroup_ok = cgroup_good(s);
1969
1970         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1971             (s->bus_name_good || s->type != SERVICE_DBUS))
1972                 service_set_state(s, SERVICE_RUNNING);
1973         else if (s->remain_after_exit)
1974                 service_set_state(s, SERVICE_EXITED);
1975         else
1976                 service_enter_stop(s, true);
1977 }
1978
1979 static void service_enter_start_post(Service *s) {
1980         int r;
1981         assert(s);
1982
1983         service_unwatch_control_pid(s);
1984
1985         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1986                 s->control_command_id = SERVICE_EXEC_START_POST;
1987
1988                 if ((r = service_spawn(s,
1989                                        s->control_command,
1990                                        true,
1991                                        false,
1992                                        !s->permissions_start_only,
1993                                        !s->root_directory_start_only,
1994                                        false,
1995                                        false,
1996                                        &s->control_pid)) < 0)
1997                         goto fail;
1998
1999                 service_set_state(s, SERVICE_START_POST);
2000         } else
2001                 service_enter_running(s, true);
2002
2003         return;
2004
2005 fail:
2006         log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2007         service_enter_stop(s, false);
2008 }
2009
2010 static void service_enter_start(Service *s) {
2011         pid_t pid;
2012         int r;
2013         ExecCommand *c;
2014
2015         assert(s);
2016
2017         assert(s->exec_command[SERVICE_EXEC_START]);
2018         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2019
2020         if (s->type == SERVICE_FORKING)
2021                 service_unwatch_control_pid(s);
2022         else
2023                 service_unwatch_main_pid(s);
2024
2025         /* We want to ensure that nobody leaks processes from
2026          * START_PRE here, so let's go on a killing spree, People
2027          * should not spawn long running processes from START_PRE. */
2028         cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, NULL);
2029
2030         if (s->type == SERVICE_FORKING) {
2031                 s->control_command_id = SERVICE_EXEC_START;
2032                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2033
2034                 s->main_command = NULL;
2035         } else {
2036                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2037                 s->control_command = NULL;
2038
2039                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2040         }
2041
2042         if ((r = service_spawn(s,
2043                                c,
2044                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2045                                true,
2046                                true,
2047                                true,
2048                                true,
2049                                s->notify_access != NOTIFY_NONE,
2050                                &pid)) < 0)
2051                 goto fail;
2052
2053         if (s->type == SERVICE_SIMPLE) {
2054                 /* For simple services we immediately start
2055                  * the START_POST binaries. */
2056
2057                 service_set_main_pid(s, pid);
2058                 service_enter_start_post(s);
2059
2060         } else  if (s->type == SERVICE_FORKING) {
2061
2062                 /* For forking services we wait until the start
2063                  * process exited. */
2064
2065                 s->control_pid = pid;
2066                 service_set_state(s, SERVICE_START);
2067
2068         } else if (s->type == SERVICE_ONESHOT ||
2069                    s->type == SERVICE_DBUS ||
2070                    s->type == SERVICE_NOTIFY) {
2071
2072                 /* For oneshot services we wait until the start
2073                  * process exited, too, but it is our main process. */
2074
2075                 /* For D-Bus services we know the main pid right away,
2076                  * but wait for the bus name to appear on the
2077                  * bus. Notify services are similar. */
2078
2079                 service_set_main_pid(s, pid);
2080                 service_set_state(s, SERVICE_START);
2081         } else
2082                 assert_not_reached("Unknown service type");
2083
2084         return;
2085
2086 fail:
2087         log_warning("%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2088         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2089 }
2090
2091 static void service_enter_start_pre(Service *s) {
2092         int r;
2093
2094         assert(s);
2095
2096         service_unwatch_control_pid(s);
2097
2098         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2099
2100                 /* Before we start anything, let's clear up what might
2101                  * be left from previous runs. */
2102                 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, NULL);
2103
2104                 s->control_command_id = SERVICE_EXEC_START_PRE;
2105
2106                 if ((r = service_spawn(s,
2107                                        s->control_command,
2108                                        true,
2109                                        false,
2110                                        !s->permissions_start_only,
2111                                        !s->root_directory_start_only,
2112                                        true,
2113                                        false,
2114                                        &s->control_pid)) < 0)
2115                         goto fail;
2116
2117                 service_set_state(s, SERVICE_START_PRE);
2118         } else
2119                 service_enter_start(s);
2120
2121         return;
2122
2123 fail:
2124         log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2125         service_enter_dead(s, false, true);
2126 }
2127
2128 static void service_enter_restart(Service *s) {
2129         int r;
2130         DBusError error;
2131
2132         assert(s);
2133         dbus_error_init(&error);
2134
2135         if (UNIT(s)->job) {
2136                 log_info("Job pending for unit, delaying automatic restart.");
2137
2138                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2139                         goto fail;
2140         }
2141
2142         service_enter_dead(s, true, false);
2143
2144         if ((r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2145                 goto fail;
2146
2147         log_debug("%s scheduled restart job.", UNIT(s)->id);
2148         return;
2149
2150 fail:
2151         log_warning("%s failed to schedule restart job: %s", UNIT(s)->id, bus_error(&error, -r));
2152         service_enter_dead(s, false, false);
2153
2154         dbus_error_free(&error);
2155 }
2156
2157 static void service_enter_reload(Service *s) {
2158         int r;
2159
2160         assert(s);
2161
2162         service_unwatch_control_pid(s);
2163
2164         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2165                 s->control_command_id = SERVICE_EXEC_RELOAD;
2166
2167                 if ((r = service_spawn(s,
2168                                        s->control_command,
2169                                        true,
2170                                        false,
2171                                        !s->permissions_start_only,
2172                                        !s->root_directory_start_only,
2173                                        false,
2174                                        false,
2175                                        &s->control_pid)) < 0)
2176                         goto fail;
2177
2178                 service_set_state(s, SERVICE_RELOAD);
2179         } else
2180                 service_enter_running(s, true);
2181
2182         return;
2183
2184 fail:
2185         log_warning("%s failed to run 'reload' task: %s", UNIT(s)->id, strerror(-r));
2186         s->reload_failure = true;
2187         service_enter_running(s, true);
2188 }
2189
2190 static void service_run_next_control(Service *s, bool success) {
2191         int r;
2192
2193         assert(s);
2194         assert(s->control_command);
2195         assert(s->control_command->command_next);
2196
2197         if (!success)
2198                 s->failure = true;
2199
2200         assert(s->control_command_id != SERVICE_EXEC_START);
2201
2202         s->control_command = s->control_command->command_next;
2203         service_unwatch_control_pid(s);
2204
2205         if ((r = service_spawn(s,
2206                                s->control_command,
2207                                true,
2208                                false,
2209                                !s->permissions_start_only,
2210                                !s->root_directory_start_only,
2211                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2212                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2213                                false,
2214                                &s->control_pid)) < 0)
2215                 goto fail;
2216
2217         return;
2218
2219 fail:
2220         log_warning("%s failed to run next control task: %s", UNIT(s)->id, strerror(-r));
2221
2222         if (s->state == SERVICE_START_PRE)
2223                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2224         else if (s->state == SERVICE_STOP)
2225                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2226         else if (s->state == SERVICE_STOP_POST)
2227                 service_enter_dead(s, false, true);
2228         else if (s->state == SERVICE_RELOAD) {
2229                 s->reload_failure = true;
2230                 service_enter_running(s, true);
2231         } else
2232                 service_enter_stop(s, false);
2233 }
2234
2235 static void service_run_next_main(Service *s, bool success) {
2236         pid_t pid;
2237         int r;
2238
2239         assert(s);
2240         assert(s->main_command);
2241         assert(s->main_command->command_next);
2242         assert(s->type == SERVICE_ONESHOT);
2243
2244         if (!success)
2245                 s->failure = true;
2246
2247         s->main_command = s->main_command->command_next;
2248         service_unwatch_main_pid(s);
2249
2250         if ((r = service_spawn(s,
2251                                s->main_command,
2252                                false,
2253                                true,
2254                                true,
2255                                true,
2256                                true,
2257                                s->notify_access != NOTIFY_NONE,
2258                                &pid)) < 0)
2259                 goto fail;
2260
2261         service_set_main_pid(s, pid);
2262
2263         return;
2264
2265 fail:
2266         log_warning("%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2267         service_enter_stop(s, false);
2268 }
2269
2270 static int service_start(Unit *u) {
2271         Service *s = SERVICE(u);
2272
2273         assert(s);
2274
2275         /* We cannot fulfill this request right now, try again later
2276          * please! */
2277         if (s->state == SERVICE_STOP ||
2278             s->state == SERVICE_STOP_SIGTERM ||
2279             s->state == SERVICE_STOP_SIGKILL ||
2280             s->state == SERVICE_STOP_POST ||
2281             s->state == SERVICE_FINAL_SIGTERM ||
2282             s->state == SERVICE_FINAL_SIGKILL)
2283                 return -EAGAIN;
2284
2285         /* Already on it! */
2286         if (s->state == SERVICE_START_PRE ||
2287             s->state == SERVICE_START ||
2288             s->state == SERVICE_START_POST)
2289                 return 0;
2290
2291         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2292
2293         /* Make sure we don't enter a busy loop of some kind. */
2294         if (!ratelimit_test(&s->ratelimit)) {
2295                 log_warning("%s start request repeated too quickly, refusing to start.", u->id);
2296                 return -ECANCELED;
2297         }
2298
2299         s->failure = false;
2300         s->main_pid_known = false;
2301         s->main_pid_alien = false;
2302         s->forbid_restart = false;
2303
2304         service_enter_start_pre(s);
2305         return 0;
2306 }
2307
2308 static int service_stop(Unit *u) {
2309         Service *s = SERVICE(u);
2310
2311         assert(s);
2312
2313         /* This is a user request, so don't do restarts on this
2314          * shutdown. */
2315         s->forbid_restart = true;
2316
2317         /* Already on it */
2318         if (s->state == SERVICE_STOP ||
2319             s->state == SERVICE_STOP_SIGTERM ||
2320             s->state == SERVICE_STOP_SIGKILL ||
2321             s->state == SERVICE_STOP_POST ||
2322             s->state == SERVICE_FINAL_SIGTERM ||
2323             s->state == SERVICE_FINAL_SIGKILL)
2324                 return 0;
2325
2326         /* Don't allow a restart */
2327         if (s->state == SERVICE_AUTO_RESTART) {
2328                 service_set_state(s, SERVICE_DEAD);
2329                 return 0;
2330         }
2331
2332         /* If there's already something running we go directly into
2333          * kill mode. */
2334         if (s->state == SERVICE_START_PRE ||
2335             s->state == SERVICE_START ||
2336             s->state == SERVICE_START_POST ||
2337             s->state == SERVICE_RELOAD) {
2338                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2339                 return 0;
2340         }
2341
2342         assert(s->state == SERVICE_RUNNING ||
2343                s->state == SERVICE_EXITED);
2344
2345         service_enter_stop(s, true);
2346         return 0;
2347 }
2348
2349 static int service_reload(Unit *u) {
2350         Service *s = SERVICE(u);
2351
2352         assert(s);
2353
2354         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2355
2356         service_enter_reload(s);
2357         return 0;
2358 }
2359
2360 static bool service_can_reload(Unit *u) {
2361         Service *s = SERVICE(u);
2362
2363         assert(s);
2364
2365         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2366 }
2367
2368 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2369         Service *s = SERVICE(u);
2370
2371         assert(u);
2372         assert(f);
2373         assert(fds);
2374
2375         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2376         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2377
2378         if (s->control_pid > 0)
2379                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2380
2381         if (s->main_pid_known && s->main_pid > 0)
2382                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2383
2384         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2385
2386         if (s->status_text)
2387                 unit_serialize_item(u, f, "status-text", s->status_text);
2388
2389         /* There's a minor uncleanliness here: if there are multiple
2390          * commands attached here, we will start from the first one
2391          * again */
2392         if (s->control_command_id >= 0)
2393                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2394
2395         if (s->socket_fd >= 0) {
2396                 int copy;
2397
2398                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2399                         return copy;
2400
2401                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2402         }
2403
2404         if (s->main_exec_status.pid > 0) {
2405                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2406                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2407                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2408
2409                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2410                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2411                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2412                 }
2413         }
2414
2415         return 0;
2416 }
2417
2418 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2419         Service *s = SERVICE(u);
2420
2421         assert(u);
2422         assert(key);
2423         assert(value);
2424         assert(fds);
2425
2426         if (streq(key, "state")) {
2427                 ServiceState state;
2428
2429                 if ((state = service_state_from_string(value)) < 0)
2430                         log_debug("Failed to parse state value %s", value);
2431                 else
2432                         s->deserialized_state = state;
2433         } else if (streq(key, "failure")) {
2434                 int b;
2435
2436                 if ((b = parse_boolean(value)) < 0)
2437                         log_debug("Failed to parse failure value %s", value);
2438                 else
2439                         s->failure = b || s->failure;
2440         } else if (streq(key, "control-pid")) {
2441                 pid_t pid;
2442
2443                 if (parse_pid(value, &pid) < 0)
2444                         log_debug("Failed to parse control-pid value %s", value);
2445                 else
2446                         s->control_pid = pid;
2447         } else if (streq(key, "main-pid")) {
2448                 pid_t pid;
2449
2450                 if (parse_pid(value, &pid) < 0)
2451                         log_debug("Failed to parse main-pid value %s", value);
2452                 else
2453                         service_set_main_pid(s, (pid_t) pid);
2454         } else if (streq(key, "main-pid-known")) {
2455                 int b;
2456
2457                 if ((b = parse_boolean(value)) < 0)
2458                         log_debug("Failed to parse main-pid-known value %s", value);
2459                 else
2460                         s->main_pid_known = b;
2461         } else if (streq(key, "status-text")) {
2462                 char *t;
2463
2464                 if ((t = strdup(value))) {
2465                         free(s->status_text);
2466                         s->status_text = t;
2467                 }
2468
2469         } else if (streq(key, "control-command")) {
2470                 ServiceExecCommand id;
2471
2472                 if ((id = service_exec_command_from_string(value)) < 0)
2473                         log_debug("Failed to parse exec-command value %s", value);
2474                 else {
2475                         s->control_command_id = id;
2476                         s->control_command = s->exec_command[id];
2477                 }
2478         } else if (streq(key, "socket-fd")) {
2479                 int fd;
2480
2481                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2482                         log_debug("Failed to parse socket-fd value %s", value);
2483                 else {
2484
2485                         if (s->socket_fd >= 0)
2486                                 close_nointr_nofail(s->socket_fd);
2487                         s->socket_fd = fdset_remove(fds, fd);
2488                 }
2489         } else if (streq(key, "main-exec-status-pid")) {
2490                 pid_t pid;
2491
2492                 if (parse_pid(value, &pid) < 0)
2493                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2494                 else
2495                         s->main_exec_status.pid = pid;
2496         } else if (streq(key, "main-exec-status-code")) {
2497                 int i;
2498
2499                 if (safe_atoi(value, &i) < 0)
2500                         log_debug("Failed to parse main-exec-status-code value %s", value);
2501                 else
2502                         s->main_exec_status.code = i;
2503         } else if (streq(key, "main-exec-status-status")) {
2504                 int i;
2505
2506                 if (safe_atoi(value, &i) < 0)
2507                         log_debug("Failed to parse main-exec-status-status value %s", value);
2508                 else
2509                         s->main_exec_status.status = i;
2510         } else if (streq(key, "main-exec-status-start"))
2511                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2512         else if (streq(key, "main-exec-status-exit"))
2513                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2514         else
2515                 log_debug("Unknown serialization key '%s'", key);
2516
2517         return 0;
2518 }
2519
2520 static UnitActiveState service_active_state(Unit *u) {
2521         assert(u);
2522
2523         return state_translation_table[SERVICE(u)->state];
2524 }
2525
2526 static const char *service_sub_state_to_string(Unit *u) {
2527         assert(u);
2528
2529         return service_state_to_string(SERVICE(u)->state);
2530 }
2531
2532 static bool service_check_gc(Unit *u) {
2533         Service *s = SERVICE(u);
2534
2535         assert(s);
2536
2537         /* Never clean up services that still have a process around,
2538          * even if the service is formally dead. */
2539         if (cgroup_good(s) > 0 ||
2540             main_pid_good(s) > 0 ||
2541             control_pid_good(s) > 0)
2542                 return true;
2543
2544 #ifdef HAVE_SYSV_COMPAT
2545         if (s->sysv_path)
2546                 return true;
2547 #endif
2548
2549         return false;
2550 }
2551
2552 static bool service_check_snapshot(Unit *u) {
2553         Service *s = SERVICE(u);
2554
2555         assert(s);
2556
2557         return !s->got_socket_fd;
2558 }
2559
2560 static int service_retry_pid_file(Service *s) {
2561         int r;
2562
2563         assert(s->pid_file);
2564         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2565
2566         r = service_load_pid_file(s, false);
2567         if (r < 0)
2568                 return r;
2569
2570         service_unwatch_pid_file(s);
2571
2572         service_enter_running(s, true);
2573         return 0;
2574 }
2575
2576 static int service_watch_pid_file(Service *s) {
2577         int r;
2578
2579         log_debug("Setting watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
2580         r = path_spec_watch(s->pid_file_pathspec, UNIT(s));
2581         if (r < 0)
2582                 goto fail;
2583
2584         /* the pidfile might have appeared just before we set the watch */
2585         service_retry_pid_file(s);
2586
2587         return 0;
2588 fail:
2589         log_error("Failed to set a watch for %s's PID file %s: %s",
2590                   UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2591         service_unwatch_pid_file(s);
2592         return r;
2593 }
2594
2595 static int service_demand_pid_file(Service *s) {
2596         PathSpec *ps;
2597
2598         assert(s->pid_file);
2599         assert(!s->pid_file_pathspec);
2600
2601         ps = new0(PathSpec, 1);
2602         if (!ps)
2603                 return -ENOMEM;
2604
2605         ps->path = strdup(s->pid_file);
2606         if (!ps->path) {
2607                 free(ps);
2608                 return -ENOMEM;
2609         }
2610
2611         path_kill_slashes(ps->path);
2612
2613         /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2614          * keep their PID file open all the time. */
2615         ps->type = PATH_MODIFIED;
2616         ps->inotify_fd = -1;
2617
2618         s->pid_file_pathspec = ps;
2619
2620         return service_watch_pid_file(s);
2621 }
2622
2623 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2624         Service *s = SERVICE(u);
2625
2626         assert(s);
2627         assert(fd >= 0);
2628         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2629         assert(s->pid_file_pathspec);
2630         assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2631
2632         log_debug("inotify event for %s", u->id);
2633
2634         if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2635                 goto fail;
2636
2637         if (service_retry_pid_file(s) == 0)
2638                 return;
2639
2640         if (service_watch_pid_file(s) < 0)
2641                 goto fail;
2642
2643         return;
2644 fail:
2645         service_unwatch_pid_file(s);
2646         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2647 }
2648
2649 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2650         Service *s = SERVICE(u);
2651         bool success;
2652
2653         assert(s);
2654         assert(pid >= 0);
2655
2656         if (!UNIT(s)->fragment_path)
2657                 success = is_clean_exit_lsb(code, status);
2658         else
2659                 success = is_clean_exit(code, status);
2660
2661         if (s->main_pid == pid) {
2662                 /* Forking services may occasionally move to a new PID.
2663                  * As long as they update the PID file before exiting the old
2664                  * PID, they're fine. */
2665                 if (service_load_pid_file(s, false) == 0)
2666                         return;
2667
2668                 s->main_pid = 0;
2669                 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2670
2671                 /* If this is not a forking service than the main
2672                  * process got started and hence we copy the exit
2673                  * status so that it is recorded both as main and as
2674                  * control process exit status */
2675                 if (s->main_command) {
2676                         s->main_command->exec_status = s->main_exec_status;
2677
2678                         if (s->main_command->ignore)
2679                                 success = true;
2680                 }
2681
2682                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2683                          "%s: main process exited, code=%s, status=%i", u->id, sigchld_code_to_string(code), status);
2684                 s->failure = s->failure || !success;
2685
2686                 if (s->main_command &&
2687                     s->main_command->command_next &&
2688                     success) {
2689
2690                         /* There is another command to *
2691                          * execute, so let's do that. */
2692
2693                         log_debug("%s running next main command for state %s", u->id, service_state_to_string(s->state));
2694                         service_run_next_main(s, success);
2695
2696                 } else {
2697
2698                         /* The service exited, so the service is officially
2699                          * gone. */
2700                         s->main_command = NULL;
2701
2702                         switch (s->state) {
2703
2704                         case SERVICE_START_POST:
2705                         case SERVICE_RELOAD:
2706                         case SERVICE_STOP:
2707                                 /* Need to wait until the operation is
2708                                  * done */
2709                                 break;
2710
2711                         case SERVICE_START:
2712                                 if (s->type == SERVICE_ONESHOT) {
2713                                         /* This was our main goal, so let's go on */
2714                                         if (success)
2715                                                 service_enter_start_post(s);
2716                                         else
2717                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2718                                         break;
2719                                 } else {
2720                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2721
2722                                         /* Fall through */
2723                                 }
2724
2725                         case SERVICE_RUNNING:
2726                                 service_enter_running(s, success);
2727                                 break;
2728
2729                         case SERVICE_STOP_SIGTERM:
2730                         case SERVICE_STOP_SIGKILL:
2731
2732                                 if (!control_pid_good(s))
2733                                         service_enter_stop_post(s, success);
2734
2735                                 /* If there is still a control process, wait for that first */
2736                                 break;
2737
2738                         default:
2739                                 assert_not_reached("Uh, main process died at wrong time.");
2740                         }
2741                 }
2742
2743         } else if (s->control_pid == pid) {
2744
2745                 s->control_pid = 0;
2746
2747                 if (s->control_command) {
2748                         exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2749
2750                         if (s->control_command->ignore)
2751                                 success = true;
2752                 }
2753
2754                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2755                          "%s: control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
2756                 s->failure = s->failure || !success;
2757
2758                 if (s->control_command &&
2759                     s->control_command->command_next &&
2760                     success) {
2761
2762                         /* There is another command to *
2763                          * execute, so let's do that. */
2764
2765                         log_debug("%s running next control command for state %s", u->id, service_state_to_string(s->state));
2766                         service_run_next_control(s, success);
2767
2768                 } else {
2769                         /* No further commands for this step, so let's
2770                          * figure out what to do next */
2771
2772                         s->control_command = NULL;
2773                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2774
2775                         log_debug("%s got final SIGCHLD for state %s", u->id, service_state_to_string(s->state));
2776
2777                         switch (s->state) {
2778
2779                         case SERVICE_START_PRE:
2780                                 if (success)
2781                                         service_enter_start(s);
2782                                 else
2783                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2784                                 break;
2785
2786                         case SERVICE_START:
2787                                 assert(s->type == SERVICE_FORKING);
2788
2789                                 if (!success) {
2790                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2791                                         break;
2792                                 }
2793
2794                                 if (s->pid_file) {
2795                                         /* Let's try to load the pid file here if we can.
2796                                          * The PID file might actually be created by a START_POST
2797                                          * script. In that case don't worry if the loading fails. */
2798                                         bool has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2799                                         int r = service_load_pid_file(s, !has_start_post);
2800                                         if (!has_start_post && r < 0) {
2801                                                 r = service_demand_pid_file(s);
2802                                                 if (r < 0 || !cgroup_good(s))
2803                                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2804                                                 break;
2805                                         }
2806                                 } else
2807                                         service_search_main_pid(s);
2808
2809                                 service_enter_start_post(s);
2810                                 break;
2811
2812                         case SERVICE_START_POST:
2813                                 if (!success) {
2814                                         service_enter_stop(s, false);
2815                                         break;
2816                                 }
2817
2818                                 if (s->pid_file) {
2819                                         int r = service_load_pid_file(s, true);
2820                                         if (r < 0) {
2821                                                 r = service_demand_pid_file(s);
2822                                                 if (r < 0 || !cgroup_good(s))
2823                                                         service_enter_stop(s, false);
2824                                                 break;
2825                                         }
2826                                 } else
2827                                         service_search_main_pid(s);
2828
2829                                 service_enter_running(s, true);
2830                                 break;
2831
2832                         case SERVICE_RELOAD:
2833                                 if (success) {
2834                                         service_load_pid_file(s, true);
2835                                         service_search_main_pid(s);
2836                                 }
2837
2838                                 s->reload_failure = !success;
2839                                 service_enter_running(s, true);
2840                                 break;
2841
2842                         case SERVICE_STOP:
2843                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2844                                 break;
2845
2846                         case SERVICE_STOP_SIGTERM:
2847                         case SERVICE_STOP_SIGKILL:
2848                                 if (main_pid_good(s) <= 0)
2849                                         service_enter_stop_post(s, success);
2850
2851                                 /* If there is still a service
2852                                  * process around, wait until
2853                                  * that one quit, too */
2854                                 break;
2855
2856                         case SERVICE_STOP_POST:
2857                         case SERVICE_FINAL_SIGTERM:
2858                         case SERVICE_FINAL_SIGKILL:
2859                                 service_enter_dead(s, success, true);
2860                                 break;
2861
2862                         default:
2863                                 assert_not_reached("Uh, control process died at wrong time.");
2864                         }
2865                 }
2866         }
2867
2868         /* Notify clients about changed exit status */
2869         unit_add_to_dbus_queue(u);
2870 }
2871
2872 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2873         Service *s = SERVICE(u);
2874
2875         assert(s);
2876         assert(elapsed == 1);
2877
2878         assert(w == &s->timer_watch);
2879
2880         switch (s->state) {
2881
2882         case SERVICE_START_PRE:
2883         case SERVICE_START:
2884                 log_warning("%s operation timed out. Terminating.", u->id);
2885                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2886                 break;
2887
2888         case SERVICE_START_POST:
2889                 log_warning("%s operation timed out. Stopping.", u->id);
2890                 service_enter_stop(s, false);
2891                 break;
2892
2893         case SERVICE_RELOAD:
2894                 log_warning("%s operation timed out. Stopping.", u->id);
2895                 s->reload_failure = true;
2896                 service_enter_running(s, true);
2897                 break;
2898
2899         case SERVICE_STOP:
2900                 log_warning("%s stopping timed out. Terminating.", u->id);
2901                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2902                 break;
2903
2904         case SERVICE_STOP_SIGTERM:
2905                 if (s->exec_context.send_sigkill) {
2906                         log_warning("%s stopping timed out. Killing.", u->id);
2907                         service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2908                 } else {
2909                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->id);
2910                         service_enter_stop_post(s, false);
2911                 }
2912
2913                 break;
2914
2915         case SERVICE_STOP_SIGKILL:
2916                 /* Uh, we sent a SIGKILL and it is still not gone?
2917                  * Must be something we cannot kill, so let's just be
2918                  * weirded out and continue */
2919
2920                 log_warning("%s still around after SIGKILL. Ignoring.", u->id);
2921                 service_enter_stop_post(s, false);
2922                 break;
2923
2924         case SERVICE_STOP_POST:
2925                 log_warning("%s stopping timed out (2). Terminating.", u->id);
2926                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2927                 break;
2928
2929         case SERVICE_FINAL_SIGTERM:
2930                 if (s->exec_context.send_sigkill) {
2931                         log_warning("%s stopping timed out (2). Killing.", u->id);
2932                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2933                 } else {
2934                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->id);
2935                         service_enter_dead(s, false, true);
2936                 }
2937
2938                 break;
2939
2940         case SERVICE_FINAL_SIGKILL:
2941                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id);
2942                 service_enter_dead(s, false, true);
2943                 break;
2944
2945         case SERVICE_AUTO_RESTART:
2946                 log_info("%s holdoff time over, scheduling restart.", u->id);
2947                 service_enter_restart(s);
2948                 break;
2949
2950         default:
2951                 assert_not_reached("Timeout at wrong time.");
2952         }
2953 }
2954
2955 static void service_cgroup_notify_event(Unit *u) {
2956         Service *s = SERVICE(u);
2957
2958         assert(u);
2959
2960         log_debug("%s: cgroup is empty", u->id);
2961
2962         switch (s->state) {
2963
2964                 /* Waiting for SIGCHLD is usually more interesting,
2965                  * because it includes return codes/signals. Which is
2966                  * why we ignore the cgroup events for most cases,
2967                  * except when we don't know pid which to expect the
2968                  * SIGCHLD for. */
2969
2970         case SERVICE_START:
2971         case SERVICE_START_POST:
2972                 /* If we were hoping for the daemon to write its PID file,
2973                  * we can give up now. */
2974                 if (s->pid_file_pathspec) {
2975                         log_warning("%s never wrote its PID file. Failing.", UNIT(s)->id);
2976                         service_unwatch_pid_file(s);
2977                         if (s->state == SERVICE_START)
2978                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2979                         else
2980                                 service_enter_stop(s, false);
2981                 }
2982                 break;
2983
2984         case SERVICE_RUNNING:
2985                 service_enter_running(s, true);
2986                 break;
2987
2988         case SERVICE_STOP_SIGTERM:
2989         case SERVICE_STOP_SIGKILL:
2990
2991                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2992                         service_enter_stop_post(s, true);
2993
2994                 break;
2995
2996         case SERVICE_FINAL_SIGTERM:
2997         case SERVICE_FINAL_SIGKILL:
2998                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2999                         service_enter_dead(s, true, true);
3000
3001                 break;
3002
3003         default:
3004                 ;
3005         }
3006 }
3007
3008 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3009         Service *s = SERVICE(u);
3010         const char *e;
3011
3012         assert(u);
3013
3014         if (s->notify_access == NOTIFY_NONE) {
3015                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
3016                             u->id, (unsigned long) pid);
3017                 return;
3018         }
3019
3020         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3021                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3022                             u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3023                 return;
3024         }
3025
3026         log_debug("%s: Got message", u->id);
3027
3028         /* Interpret MAINPID= */
3029         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3030             (s->state == SERVICE_START ||
3031              s->state == SERVICE_START_POST ||
3032              s->state == SERVICE_RUNNING ||
3033              s->state == SERVICE_RELOAD)) {
3034
3035                 if (parse_pid(e + 8, &pid) < 0)
3036                         log_warning("Failed to parse notification message %s", e);
3037                 else {
3038                         log_debug("%s: got %s", u->id, e);
3039                         service_set_main_pid(s, pid);
3040                 }
3041         }
3042
3043         /* Interpret READY= */
3044         if (s->type == SERVICE_NOTIFY &&
3045             s->state == SERVICE_START &&
3046             strv_find(tags, "READY=1")) {
3047                 log_debug("%s: got READY=1", u->id);
3048
3049                 service_enter_start_post(s);
3050         }
3051
3052         /* Interpret STATUS= */
3053         if ((e = strv_find_prefix(tags, "STATUS="))) {
3054                 char *t;
3055
3056                 if (e[7]) {
3057                         if (!(t = strdup(e+7))) {
3058                                 log_error("Failed to allocate string.");
3059                                 return;
3060                         }
3061
3062                         log_debug("%s: got %s", u->id, e);
3063
3064                         free(s->status_text);
3065                         s->status_text = t;
3066                 } else {
3067                         free(s->status_text);
3068                         s->status_text = NULL;
3069                 }
3070
3071         }
3072
3073         /* Notify clients about changed status or main pid */
3074         unit_add_to_dbus_queue(u);
3075 }
3076
3077 #ifdef HAVE_SYSV_COMPAT
3078
3079 #ifdef TARGET_SUSE
3080 static void sysv_facility_in_insserv_conf(Manager *mgr) {
3081         FILE *f=NULL;
3082         int r;
3083
3084         if (!(f = fopen("/etc/insserv.conf", "re"))) {
3085                 r = errno == ENOENT ? 0 : -errno;
3086                 goto finish;
3087         }
3088
3089         while (!feof(f)) {
3090                 char l[LINE_MAX], *t;
3091                 char **parsed = NULL;
3092
3093                 if (!fgets(l, sizeof(l), f)) {
3094                         if (feof(f))
3095                                 break;
3096
3097                         r = -errno;
3098                         log_error("Failed to read configuration file '/etc/insserv.conf': %s", strerror(-r));
3099                         goto finish;
3100                 }
3101
3102                 t = strstrip(l);
3103                 if (*t != '$' && *t != '<')
3104                         continue;
3105
3106                 parsed = strv_split(t,WHITESPACE);
3107                 /* we ignore <interactive>, not used, equivalent to X-Interactive */
3108                 if (parsed && !startswith_no_case (parsed[0], "<interactive>")) {
3109                         char *facility;
3110                         Unit *u;
3111                         if (sysv_translate_facility(parsed[0], NULL, &facility) < 0)
3112                                 continue;
3113                         if ((u = manager_get_unit(mgr, facility)) && (u->type == UNIT_TARGET)) {
3114                                 UnitDependency e;
3115                                 char *dep = NULL, *name, **j;
3116
3117                                 STRV_FOREACH (j, parsed+1) {
3118                                         if (*j[0]=='+') {
3119                                                 e = UNIT_WANTS;
3120                                                 name = *j+1;
3121                                         }
3122                                         else {
3123                                                 e = UNIT_REQUIRES;
3124                                                 name = *j;
3125                                         }
3126                                         if (sysv_translate_facility(name, NULL, &dep) < 0)
3127                                                 continue;
3128
3129                                         r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, e, dep, NULL, true);
3130                                         free(dep);
3131                                 }
3132                         }
3133                         free(facility);
3134                 }
3135                 strv_free(parsed);
3136         }
3137 finish:
3138         if (f)
3139                 fclose(f);
3140
3141 }
3142 #endif
3143
3144 static int service_enumerate(Manager *m) {
3145         char **p;
3146         unsigned i;
3147         DIR *d = NULL;
3148         char *path = NULL, *fpath = NULL, *name = NULL;
3149         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
3150         Unit *service;
3151         Iterator j;
3152         int r;
3153
3154         assert(m);
3155
3156         if (m->running_as != MANAGER_SYSTEM)
3157                 return 0;
3158
3159         zero(runlevel_services);
3160
3161         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3162                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3163                         struct dirent *de;
3164
3165                         free(path);
3166                         path = join(*p, "/", rcnd_table[i].path, NULL);
3167                         if (!path) {
3168                                 r = -ENOMEM;
3169                                 goto finish;
3170                         }
3171
3172                         if (d)
3173                                 closedir(d);
3174
3175                         if (!(d = opendir(path))) {
3176                                 if (errno != ENOENT)
3177                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
3178
3179                                 continue;
3180                         }
3181
3182                         while ((de = readdir(d))) {
3183                                 int a, b;
3184
3185                                 if (ignore_file(de->d_name))
3186                                         continue;
3187
3188                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3189                                         continue;
3190
3191                                 if (strlen(de->d_name) < 4)
3192                                         continue;
3193
3194                                 a = undecchar(de->d_name[1]);
3195                                 b = undecchar(de->d_name[2]);
3196
3197                                 if (a < 0 || b < 0)
3198                                         continue;
3199
3200                                 free(fpath);
3201                                 fpath = join(path, "/", de->d_name, NULL);
3202                                 if (!fpath) {
3203                                         r = -ENOMEM;
3204                                         goto finish;
3205                                 }
3206
3207                                 if (access(fpath, X_OK) < 0) {
3208
3209                                         if (errno != ENOENT)
3210                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3211
3212                                         continue;
3213                                 }
3214
3215                                 free(name);
3216                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
3217                                         r = -ENOMEM;
3218                                         goto finish;
3219                                 }
3220
3221                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3222                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3223                                         continue;
3224                                 }
3225
3226                                 if (de->d_name[0] == 'S')  {
3227
3228                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3229                                                 SERVICE(service)->sysv_start_priority_from_rcnd =
3230                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3231
3232                                                 SERVICE(service)->sysv_enabled = true;
3233                                         }
3234
3235                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3236                                                 goto finish;
3237
3238                                         if ((r = set_put(runlevel_services[i], service)) < 0)
3239                                                 goto finish;
3240
3241                                 } else if (de->d_name[0] == 'K' &&
3242                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
3243                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3244
3245                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3246                                                 goto finish;
3247
3248                                         if ((r = set_put(shutdown_services, service)) < 0)
3249                                                 goto finish;
3250                                 }
3251                         }
3252                 }
3253
3254         /* Now we loaded all stubs and are aware of the lowest
3255         start-up priority for all services, not let's actually load
3256         the services, this will also tell us which services are
3257         actually native now */
3258         manager_dispatch_load_queue(m);
3259
3260         /* If this is a native service, rely on native ways to pull in
3261          * a service, don't pull it in via sysv rcN.d links. */
3262         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3263                 SET_FOREACH(service, runlevel_services[i], j) {
3264                         service = unit_follow_merge(service);
3265
3266                         if (service->fragment_path)
3267                                 continue;
3268
3269                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3270                                 goto finish;
3271                 }
3272
3273         /* We honour K links only for halt/reboot. For the normal
3274          * runlevels we assume the stop jobs will be implicitly added
3275          * by the core logic. Also, we don't really distinguish here
3276          * between the runlevels 0 and 6 and just add them to the
3277          * special shutdown target. On SUSE the boot.d/ runlevel is
3278          * also used for shutdown, so we add links for that too to the
3279          * shutdown target.*/
3280         SET_FOREACH(service, shutdown_services, j) {
3281                 service = unit_follow_merge(service);
3282
3283                 if (service->fragment_path)
3284                         continue;
3285
3286                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3287                         goto finish;
3288         }
3289
3290         r = 0;
3291
3292 #ifdef TARGET_SUSE
3293         sysv_facility_in_insserv_conf (m);
3294 #endif
3295
3296 finish:
3297         free(path);
3298         free(fpath);
3299         free(name);
3300
3301         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3302                 set_free(runlevel_services[i]);
3303         set_free(shutdown_services);
3304
3305         if (d)
3306                 closedir(d);
3307
3308         return r;
3309 }
3310 #endif
3311
3312 static void service_bus_name_owner_change(
3313                 Unit *u,
3314                 const char *name,
3315                 const char *old_owner,
3316                 const char *new_owner) {
3317
3318         Service *s = SERVICE(u);
3319
3320         assert(s);
3321         assert(name);
3322
3323         assert(streq(s->bus_name, name));
3324         assert(old_owner || new_owner);
3325
3326         if (old_owner && new_owner)
3327                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->id, name, old_owner, new_owner);
3328         else if (old_owner)
3329                 log_debug("%s's D-Bus name %s no longer registered by %s", u->id, name, old_owner);
3330         else
3331                 log_debug("%s's D-Bus name %s now registered by %s", u->id, name, new_owner);
3332
3333         s->bus_name_good = !!new_owner;
3334
3335         if (s->type == SERVICE_DBUS) {
3336
3337                 /* service_enter_running() will figure out what to
3338                  * do */
3339                 if (s->state == SERVICE_RUNNING)
3340                         service_enter_running(s, true);
3341                 else if (s->state == SERVICE_START && new_owner)
3342                         service_enter_start_post(s);
3343
3344         } else if (new_owner &&
3345                    s->main_pid <= 0 &&
3346                    (s->state == SERVICE_START ||
3347                     s->state == SERVICE_START_POST ||
3348                     s->state == SERVICE_RUNNING ||
3349                     s->state == SERVICE_RELOAD)) {
3350
3351                 /* Try to acquire PID from bus service */
3352                 log_debug("Trying to acquire PID from D-Bus name...");
3353
3354                 bus_query_pid(u->manager, name);
3355         }
3356 }
3357
3358 static void service_bus_query_pid_done(
3359                 Unit *u,
3360                 const char *name,
3361                 pid_t pid) {
3362
3363         Service *s = SERVICE(u);
3364
3365         assert(s);
3366         assert(name);
3367
3368         log_debug("%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
3369
3370         if (s->main_pid <= 0 &&
3371             (s->state == SERVICE_START ||
3372              s->state == SERVICE_START_POST ||
3373              s->state == SERVICE_RUNNING ||
3374              s->state == SERVICE_RELOAD))
3375                 service_set_main_pid(s, pid);
3376 }
3377
3378 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3379
3380         assert(s);
3381         assert(fd >= 0);
3382
3383         /* This is called by the socket code when instantiating a new
3384          * service for a stream socket and the socket needs to be
3385          * configured. */
3386
3387         if (UNIT(s)->load_state != UNIT_LOADED)
3388                 return -EINVAL;
3389
3390         if (s->socket_fd >= 0)
3391                 return -EBUSY;
3392
3393         if (s->state != SERVICE_DEAD)
3394                 return -EAGAIN;
3395
3396         s->socket_fd = fd;
3397         s->got_socket_fd = true;
3398
3399         unit_ref_set(&s->accept_socket, UNIT(sock));
3400
3401         return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3402 }
3403
3404 static void service_reset_failed(Unit *u) {
3405         Service *s = SERVICE(u);
3406
3407         assert(s);
3408
3409         if (s->state == SERVICE_FAILED)
3410                 service_set_state(s, SERVICE_DEAD);
3411
3412         s->failure = false;
3413 }
3414
3415 static bool service_need_daemon_reload(Unit *u) {
3416         Service *s = SERVICE(u);
3417
3418         assert(s);
3419
3420 #ifdef HAVE_SYSV_COMPAT
3421         if (s->sysv_path) {
3422                 struct stat st;
3423
3424                 zero(st);
3425                 if (stat(s->sysv_path, &st) < 0)
3426                         /* What, cannot access this anymore? */
3427                         return true;
3428
3429                 if (s->sysv_mtime > 0 &&
3430                     timespec_load(&st.st_mtim) != s->sysv_mtime)
3431                         return true;
3432         }
3433 #endif
3434
3435         return false;
3436 }
3437
3438 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3439         Service *s = SERVICE(u);
3440         int r = 0;
3441         Set *pid_set = NULL;
3442
3443         assert(s);
3444
3445         if (s->main_pid <= 0 && who == KILL_MAIN) {
3446                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3447                 return -ESRCH;
3448         }
3449
3450         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3451                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3452                 return -ESRCH;
3453         }
3454
3455         if (who == KILL_CONTROL || who == KILL_ALL)
3456                 if (s->control_pid > 0)
3457                         if (kill(s->control_pid, signo) < 0)
3458                                 r = -errno;
3459
3460         if (who == KILL_MAIN || who == KILL_ALL)
3461                 if (s->main_pid > 0)
3462                         if (kill(s->main_pid, signo) < 0)
3463                                 r = -errno;
3464
3465         if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
3466                 int q;
3467
3468                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3469                         return -ENOMEM;
3470
3471                 /* Exclude the control/main pid from being killed via the cgroup */
3472                 if (s->control_pid > 0)
3473                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3474                                 r = q;
3475                                 goto finish;
3476                         }
3477
3478                 if (s->main_pid > 0)
3479                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3480                                 r = q;
3481                                 goto finish;
3482                         }
3483
3484                 if ((q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, pid_set)) < 0)
3485                         if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
3486                                 r = q;
3487         }
3488
3489 finish:
3490         if (pid_set)
3491                 set_free(pid_set);
3492
3493         return r;
3494 }
3495
3496 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3497         [SERVICE_DEAD] = "dead",
3498         [SERVICE_START_PRE] = "start-pre",
3499         [SERVICE_START] = "start",
3500         [SERVICE_START_POST] = "start-post",
3501         [SERVICE_RUNNING] = "running",
3502         [SERVICE_EXITED] = "exited",
3503         [SERVICE_RELOAD] = "reload",
3504         [SERVICE_STOP] = "stop",
3505         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3506         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3507         [SERVICE_STOP_POST] = "stop-post",
3508         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3509         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3510         [SERVICE_FAILED] = "failed",
3511         [SERVICE_AUTO_RESTART] = "auto-restart",
3512 };
3513
3514 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3515
3516 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3517         [SERVICE_RESTART_NO] = "no",
3518         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3519         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3520         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3521         [SERVICE_RESTART_ALWAYS] = "always"
3522 };
3523
3524 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3525
3526 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3527         [SERVICE_SIMPLE] = "simple",
3528         [SERVICE_FORKING] = "forking",
3529         [SERVICE_ONESHOT] = "oneshot",
3530         [SERVICE_DBUS] = "dbus",
3531         [SERVICE_NOTIFY] = "notify"
3532 };
3533
3534 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3535
3536 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3537         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3538         [SERVICE_EXEC_START] = "ExecStart",
3539         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3540         [SERVICE_EXEC_RELOAD] = "ExecReload",
3541         [SERVICE_EXEC_STOP] = "ExecStop",
3542         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3543 };
3544
3545 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3546
3547 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3548         [NOTIFY_NONE] = "none",
3549         [NOTIFY_MAIN] = "main",
3550         [NOTIFY_ALL] = "all"
3551 };
3552
3553 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3554
3555 const UnitVTable service_vtable = {
3556         .suffix = ".service",
3557         .object_size = sizeof(Service),
3558         .sections =
3559                 "Unit\0"
3560                 "Service\0"
3561                 "Install\0",
3562         .show_status = true,
3563
3564         .init = service_init,
3565         .done = service_done,
3566         .load = service_load,
3567
3568         .coldplug = service_coldplug,
3569
3570         .dump = service_dump,
3571
3572         .start = service_start,
3573         .stop = service_stop,
3574         .reload = service_reload,
3575
3576         .can_reload = service_can_reload,
3577
3578         .kill = service_kill,
3579
3580         .serialize = service_serialize,
3581         .deserialize_item = service_deserialize_item,
3582
3583         .active_state = service_active_state,
3584         .sub_state_to_string = service_sub_state_to_string,
3585
3586         .check_gc = service_check_gc,
3587         .check_snapshot = service_check_snapshot,
3588
3589         .sigchld_event = service_sigchld_event,
3590         .timer_event = service_timer_event,
3591         .fd_event = service_fd_event,
3592
3593         .reset_failed = service_reset_failed,
3594
3595         .need_daemon_reload = service_need_daemon_reload,
3596
3597         .cgroup_notify_empty = service_cgroup_notify_event,
3598         .notify_message = service_notify_message,
3599
3600         .bus_name_owner_change = service_bus_name_owner_change,
3601         .bus_query_pid_done = service_bus_query_pid_done,
3602
3603         .bus_interface = "org.freedesktop.systemd1.Service",
3604         .bus_message_handler = bus_service_message_handler,
3605         .bus_invalidating_properties =  bus_service_invalidating_properties,
3606
3607 #ifdef HAVE_SYSV_COMPAT
3608         .enumerate = service_enumerate
3609 #endif
3610 };