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
  38 #define COMMENTS "#;\n"
  39 #define NEWLINES "\n\r"
  40
  41 typedef enum RunlevelType {
  42         RUNLEVEL_UP,
  43         RUNLEVEL_DOWN,
  44         RUNLEVEL_SYSINIT
  45 } RunlevelType;
  46
  47 static const struct {
  48         const char *path;
  49         const char *target;
  50         const RunlevelType type;
  51 } rcnd_table[] = {
  52         /* Standard SysV runlevels for start-up */
  53         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  54         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  55         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  56         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  57         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  58
  59 #ifdef TARGET_SUSE
  60         /* SUSE style boot.d */
  61         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  62 #endif
  63
  64 #ifdef TARGET_DEBIAN
  65         /* Debian style rcS.d */
  66         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  67 #endif
  68
  69         /* Standard SysV runlevels for shutdown */
  70         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  71         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  72
  73         /* Note that the order here matters, as we read the
  74            directories in this order, and we want to make sure that
  75            sysv_start_priority is known when we first load the
  76            unit. And that value we only know from S links. Hence
  77            UP/SYSINIT must be read before DOWN */
  78 };
  79
  80 #define RUNLEVELS_UP "12345"
  81 /* #define RUNLEVELS_DOWN "06" */
  82 /* #define RUNLEVELS_BOOT "bBsS" */
  83
  84 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  85         [SERVICE_DEAD] = UNIT_INACTIVE,
  86         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  87         [SERVICE_START] = UNIT_ACTIVATING,
  88         [SERVICE_START_POST] = UNIT_ACTIVATING,
  89         [SERVICE_RUNNING] = UNIT_ACTIVE,
  90         [SERVICE_EXITED] = UNIT_ACTIVE,
  91         [SERVICE_RELOAD] = UNIT_RELOADING,
  92         [SERVICE_STOP] = UNIT_DEACTIVATING,
  93         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  94         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  95         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  96         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  97         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  98         [SERVICE_FAILED] = UNIT_FAILED,
  99         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 100 };
 101
 102 static void service_init(Unit *u) {
 103         Service *s = SERVICE(u);
 104
 105         assert(u);
 106         assert(u->meta.load_state == UNIT_STUB);
 107
 108         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 109         s->restart_usec = DEFAULT_RESTART_USEC;
 110         s->timer_watch.type = WATCH_INVALID;
 111         s->sysv_start_priority = -1;
 112         s->socket_fd = -1;
 113
 114         exec_context_init(&s->exec_context);
 115
 116         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 117
 118         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 119 }
 120
 121 static void service_unwatch_control_pid(Service *s) {
 122         assert(s);
 123
 124         if (s->control_pid <= 0)
 125                 return;
 126
 127         unit_unwatch_pid(UNIT(s), s->control_pid);
 128         s->control_pid = 0;
 129 }
 130
 131 static void service_unwatch_main_pid(Service *s) {
 132         assert(s);
 133
 134         if (s->main_pid <= 0)
 135                 return;
 136
 137         unit_unwatch_pid(UNIT(s), s->main_pid);
 138         s->main_pid = 0;
 139 }
 140
 141 static int service_set_main_pid(Service *s, pid_t pid) {
 142         pid_t ppid;
 143
 144         assert(s);
 145
 146         if (pid <= 1)
 147                 return -EINVAL;
 148
 149         if (pid == getpid())
 150                 return -EINVAL;
 151
 152         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 153                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 154                             s->meta.id, (unsigned long) pid);
 155
 156         s->main_pid = pid;
 157         s->main_pid_known = true;
 158
 159         exec_status_start(&s->main_exec_status, pid);
 160
 161         return 0;
 162 }
 163
 164 static void service_close_socket_fd(Service *s) {
 165         assert(s);
 166
 167         if (s->socket_fd < 0)
 168                 return;
 169
 170         close_nointr_nofail(s->socket_fd);
 171         s->socket_fd = -1;
 172 }
 173
 174 static void service_connection_unref(Service *s) {
 175         assert(s);
 176
 177         if (!s->socket)
 178                 return;
 179
 180         socket_connection_unref(s->socket);
 181         s->socket = NULL;
 182 }
 183
 184 static void service_done(Unit *u) {
 185         Service *s = SERVICE(u);
 186
 187         assert(s);
 188
 189         free(s->pid_file);
 190         s->pid_file = NULL;
 191
 192         free(s->sysv_path);
 193         s->sysv_path = NULL;
 194
 195         free(s->sysv_runlevels);
 196         s->sysv_runlevels = NULL;
 197
 198         free(s->status_text);
 199         s->status_text = NULL;
 200
 201         exec_context_done(&s->exec_context);
 202         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 203         s->control_command = NULL;
 204
 205         /* This will leak a process, but at least no memory or any of
 206          * our resources */
 207         service_unwatch_main_pid(s);
 208         service_unwatch_control_pid(s);
 209
 210         if (s->bus_name)  {
 211                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 212                 free(s->bus_name);
 213                 s->bus_name = NULL;
 214         }
 215
 216         service_close_socket_fd(s);
 217         service_connection_unref(s);
 218
 219         unit_unwatch_timer(u, &s->timer_watch);
 220 }
 221
 222 static char *sysv_translate_name(const char *name) {
 223         char *r;
 224
 225         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 226                 return NULL;
 227
 228         if (startswith(name, "boot."))
 229                 /* Drop SuSE-style boot. prefix */
 230                 strcpy(stpcpy(r, name + 5), ".service");
 231         else if (endswith(name, ".sh"))
 232                 /* Drop Debian-style .sh suffix */
 233                 strcpy(stpcpy(r, name) - 3, ".service");
 234         else
 235                 /* Normal init scripts */
 236                 strcpy(stpcpy(r, name), ".service");
 237
 238         return r;
 239 }
 240
 241 static int sysv_translate_facility(const char *name, char **_r) {
 242
 243         static const char * const table[] = {
 244                 /* LSB defined facilities */
 245                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 246                 "$network",   SPECIAL_NETWORK_TARGET,
 247                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 248                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 249                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 250                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 251                 "$time",      SPECIAL_RTC_SET_TARGET,
 252
 253                 /* Debian extensions */
 254 #ifdef TARGET_DEBIAN
 255                 "$mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 256 #endif
 257                 "$mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 258                 "$x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 259
 260 #ifdef TARGET_FEDORA
 261                 /* Fedora extensions, lacking the $ prefix */
 262                 "MTA",        SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 263                 "smtpdaemon", SPECIAL_MAIL_TRANSFER_AGENT_TARGET
 264 #endif
 265         };
 266
 267         unsigned i;
 268         char *r;
 269
 270         for (i = 0; i < ELEMENTSOF(table); i += 2)
 271                 if (streq(table[i], name)) {
 272                         if (!(r = strdup(table[i+1])))
 273                                 return -ENOMEM;
 274
 275                         goto finish;
 276                 }
 277
 278         if (*name == '$')
 279                 return 0;
 280
 281         if (!(r = sysv_translate_name(name)))
 282                 return -ENOMEM;
 283
 284 finish:
 285
 286         if (_r)
 287                 *_r = r;
 288
 289         return 1;
 290 }
 291
 292 static int sysv_fix_order(Service *s) {
 293         Meta *other;
 294         int r;
 295
 296         assert(s);
 297
 298         if (s->sysv_start_priority < 0)
 299                 return 0;
 300
 301         /* For each pair of services where at least one lacks a LSB
 302          * header, we use the start priority value to order things. */
 303
 304         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 305                 Service *t;
 306                 UnitDependency d;
 307                 bool special_s, special_t;
 308
 309                 t = (Service*) other;
 310
 311                 if (s == t)
 312                         continue;
 313
 314                 if (t->sysv_start_priority < 0)
 315                         continue;
 316
 317                 /* If both units have modern headers we don't care
 318                  * about the priorities */
 319                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 320                     (!t->sysv_path || t->sysv_has_lsb))
 321                         continue;
 322
 323                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 324                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 325
 326                 if (special_t && !special_s)
 327                         d = UNIT_AFTER;
 328                 else if (special_s && !special_t)
 329                         d = UNIT_BEFORE;
 330                 else if (t->sysv_start_priority < s->sysv_start_priority)
 331                         d = UNIT_AFTER;
 332                 else if (t->sysv_start_priority > s->sysv_start_priority)
 333                         d = UNIT_BEFORE;
 334                 else
 335                         continue;
 336
 337                 /* FIXME: Maybe we should compare the name here lexicographically? */
 338
 339                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 340                         return r;
 341         }
 342
 343         return 0;
 344 }
 345
 346 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 347         ExecCommand *c;
 348
 349         if (!(c = new0(ExecCommand, 1)))
 350                 return NULL;
 351
 352         if (!(c->path = strdup(path))) {
 353                 free(c);
 354                 return NULL;
 355         }
 356
 357         if (!(c->argv = strv_new(path, arg1, NULL))) {
 358                 free(c->path);
 359                 free(c);
 360                 return NULL;
 361         }
 362
 363         return c;
 364 }
 365
 366 static int sysv_exec_commands(Service *s) {
 367         ExecCommand *c;
 368
 369         assert(s);
 370         assert(s->sysv_path);
 371
 372         if (!(c = exec_command_new(s->sysv_path, "start")))
 373                 return -ENOMEM;
 374         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 375
 376         if (!(c = exec_command_new(s->sysv_path, "stop")))
 377                 return -ENOMEM;
 378         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 379
 380         if (!(c = exec_command_new(s->sysv_path, "reload")))
 381                 return -ENOMEM;
 382         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 383
 384         return 0;
 385 }
 386
 387 static int service_load_sysv_path(Service *s, const char *path) {
 388         FILE *f;
 389         Unit *u;
 390         unsigned line = 0;
 391         int r;
 392         enum {
 393                 NORMAL,
 394                 DESCRIPTION,
 395                 LSB,
 396                 LSB_DESCRIPTION
 397         } state = NORMAL;
 398
 399         assert(s);
 400         assert(path);
 401
 402         u = UNIT(s);
 403
 404         if (!(f = fopen(path, "re"))) {
 405                 r = errno == ENOENT ? 0 : -errno;
 406                 goto finish;
 407         }
 408
 409         free(s->sysv_path);
 410         if (!(s->sysv_path = strdup(path))) {
 411                 r = -ENOMEM;
 412                 goto finish;
 413         }
 414
 415         while (!feof(f)) {
 416                 char l[LINE_MAX], *t;
 417
 418                 if (!fgets(l, sizeof(l), f)) {
 419                         if (feof(f))
 420                                 break;
 421
 422                         r = -errno;
 423                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 424                         goto finish;
 425                 }
 426
 427                 line++;
 428
 429                 t = strstrip(l);
 430                 if (*t != '#')
 431                         continue;
 432
 433                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 434                         state = LSB;
 435                         s->sysv_has_lsb = true;
 436                         continue;
 437                 }
 438
 439                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 440                         state = NORMAL;
 441                         continue;
 442                 }
 443
 444                 t++;
 445                 t += strspn(t, WHITESPACE);
 446
 447                 if (state == NORMAL) {
 448
 449                         /* Try to parse Red Hat style chkconfig headers */
 450
 451                         if (startswith_no_case(t, "chkconfig:")) {
 452                                 int start_priority;
 453                                 char runlevels[16], *k;
 454
 455                                 state = NORMAL;
 456
 457                                 if (sscanf(t+10, "%15s %i %*i",
 458                                            runlevels,
 459                                            &start_priority) != 2) {
 460
 461                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 462                                         continue;
 463                                 }
 464
 465                                 /* A start priority gathered from the
 466                                  * symlink farms is preferred over the
 467                                  * data from the LSB header. */
 468                                 if (start_priority < 0 || start_priority > 99)
 469                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 470                                 else if (s->sysv_start_priority < 0)
 471                                         s->sysv_start_priority = start_priority;
 472
 473                                 char_array_0(runlevels);
 474                                 k = delete_chars(runlevels, WHITESPACE "-");
 475
 476                                 if (k[0]) {
 477                                         char *d;
 478
 479                                         if (!(d = strdup(k))) {
 480                                                 r = -ENOMEM;
 481                                                 goto finish;
 482                                         }
 483
 484                                         free(s->sysv_runlevels);
 485                                         s->sysv_runlevels = d;
 486                                 }
 487
 488                         } else if (startswith_no_case(t, "description:") &&
 489                                    !u->meta.description) {
 490
 491                                 size_t k = strlen(t);
 492                                 char *d;
 493
 494                                 if (t[k-1] == '\\') {
 495                                         state = DESCRIPTION;
 496                                         t[k-1] = 0;
 497                                 }
 498
 499                                 if (!(d = strappend("LSB: ", strstrip(t+12)))) {
 500                                         r = -ENOMEM;
 501                                         goto finish;
 502                                 }
 503
 504                                 free(u->meta.description);
 505                                 u->meta.description = d;
 506
 507                         } else if (startswith_no_case(t, "pidfile:")) {
 508
 509                                 char *fn;
 510
 511                                 state = NORMAL;
 512
 513                                 fn = strstrip(t+8);
 514                                 if (!path_is_absolute(fn)) {
 515                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 516                                         continue;
 517                                 }
 518
 519                                 if (!(fn = strdup(fn))) {
 520                                         r = -ENOMEM;
 521                                         goto finish;
 522                                 }
 523
 524                                 free(s->pid_file);
 525                                 s->pid_file = fn;
 526                         }
 527
 528                 } else if (state == DESCRIPTION) {
 529
 530                         /* Try to parse Red Hat style description
 531                          * continuation */
 532
 533                         size_t k = strlen(t);
 534                         char *d;
 535
 536                         if (t[k-1] == '\\')
 537                                 t[k-1] = 0;
 538                         else
 539                                 state = NORMAL;
 540
 541                         assert(u->meta.description);
 542                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 543                                 r = -ENOMEM;
 544                                 goto finish;
 545                         }
 546
 547                         free(u->meta.description);
 548                         u->meta.description = d;
 549
 550                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 551
 552                         if (startswith_no_case(t, "Provides:")) {
 553                                 char *i, *w;
 554                                 size_t z;
 555
 556                                 state = LSB;
 557
 558                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 559                                         char *n, *m;
 560
 561                                         if (!(n = strndup(w, z))) {
 562                                                 r = -ENOMEM;
 563                                                 goto finish;
 564                                         }
 565
 566                                         r = sysv_translate_facility(n, &m);
 567                                         free(n);
 568
 569                                         if (r < 0)
 570                                                 goto finish;
 571
 572                                         if (r == 0)
 573                                                 continue;
 574
 575                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 576                                                 r = unit_add_name(u, m);
 577                                         else if (s->sysv_enabled)
 578                                                 r = unit_add_two_dependencies_by_name_inverse(u, UNIT_AFTER, UNIT_WANTS, m, NULL, true);
 579                                         else
 580                                                 r = unit_add_dependency_by_name_inverse(u, UNIT_AFTER, m, NULL, true);
 581
 582                                         if (r < 0)
 583                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 584
 585                                         free(m);
 586                                 }
 587
 588                         } else if (startswith_no_case(t, "Required-Start:") ||
 589                                    startswith_no_case(t, "Should-Start:") ||
 590                                    startswith_no_case(t, "X-Start-Before:") ||
 591                                    startswith_no_case(t, "X-Start-After:")) {
 592                                 char *i, *w;
 593                                 size_t z;
 594
 595                                 state = LSB;
 596
 597                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 598                                         char *n, *m;
 599
 600                                         if (!(n = strndup(w, z))) {
 601                                                 r = -ENOMEM;
 602                                                 goto finish;
 603                                         }
 604
 605                                         r = sysv_translate_facility(n, &m);
 606                                         free(n);
 607
 608                                         if (r < 0)
 609                                                 goto finish;
 610
 611                                         if (r == 0)
 612                                                 continue;
 613
 614                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 615
 616                                         if (r < 0)
 617                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 618
 619                                         free(m);
 620                                 }
 621                         } else if (startswith_no_case(t, "Default-Start:")) {
 622                                 char *k, *d;
 623
 624                                 state = LSB;
 625
 626                                 k = delete_chars(t+14, WHITESPACE "-");
 627
 628                                 if (k[0] != 0) {
 629                                         if (!(d = strdup(k))) {
 630                                                 r = -ENOMEM;
 631                                                 goto finish;
 632                                         }
 633
 634                                         free(s->sysv_runlevels);
 635                                         s->sysv_runlevels = d;
 636                                 }
 637
 638                         } else if (startswith_no_case(t, "Description:") &&
 639                                    !u->meta.description) {
 640                                 char *d;
 641
 642                                 /* We use the long description only if
 643                                  * no short description is set. */
 644
 645                                 state = LSB_DESCRIPTION;
 646
 647                                 if (!(d = strappend("LSB: ", strstrip(t+12)))) {
 648                                         r = -ENOMEM;
 649                                         goto finish;
 650                                 }
 651
 652                                 free(u->meta.description);
 653                                 u->meta.description = d;
 654
 655                         } else if (startswith_no_case(t, "Short-Description:")) {
 656                                 char *d;
 657
 658                                 state = LSB;
 659
 660                                 if (!(d = strappend("LSB: ", strstrip(t+18)))) {
 661                                         r = -ENOMEM;
 662                                         goto finish;
 663                                 }
 664
 665                                 free(u->meta.description);
 666                                 u->meta.description = d;
 667
 668                         } else if (startswith_no_case(t, "X-Interactive:")) {
 669                                 int b;
 670
 671                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 672                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 673                                         continue;
 674                                 }
 675
 676                                 if (b)
 677                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 678                                 else
 679                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 680
 681                         } else if (state == LSB_DESCRIPTION) {
 682
 683                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 684                                         char *d;
 685
 686                                         assert(u->meta.description);
 687                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 688                                                 r = -ENOMEM;
 689                                                 goto finish;
 690                                         }
 691
 692                                         free(u->meta.description);
 693                                         u->meta.description = d;
 694                                 } else
 695                                         state = LSB;
 696                         }
 697                 }
 698         }
 699
 700         if ((r = sysv_exec_commands(s)) < 0)
 701                 goto finish;
 702
 703         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 704                 /* If there a runlevels configured for this service
 705                  * but none of the standard ones, then we assume this
 706                  * is some special kind of service (which might be
 707                  * needed for early boot) and don't create any links
 708                  * to it. */
 709
 710                 s->meta.default_dependencies = false;
 711
 712                 /* Don't timeout special services during boot (like fsck) */
 713                 s->timeout_usec = 0;
 714         }
 715
 716         /* Special setting for all SysV services */
 717         s->type = SERVICE_FORKING;
 718         s->remain_after_exit = true;
 719         s->restart = SERVICE_ONCE;
 720         s->exec_context.std_output =
 721                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 722                 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
 723         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 724
 725         u->meta.load_state = UNIT_LOADED;
 726         r = 0;
 727
 728 finish:
 729
 730         if (f)
 731                 fclose(f);
 732
 733         return r;
 734 }
 735
 736 static int service_load_sysv_name(Service *s, const char *name) {
 737         char **p;
 738
 739         assert(s);
 740         assert(name);
 741
 742         /* For SysV services we strip the boot. or .sh
 743          * prefixes/suffixes. */
 744         if (startswith(name, "boot.") ||
 745             endswith(name, ".sh.service"))
 746                 return -ENOENT;
 747
 748         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 749                 char *path;
 750                 int r;
 751
 752                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 753                         return -ENOMEM;
 754
 755                 assert(endswith(path, ".service"));
 756                 path[strlen(path)-8] = 0;
 757
 758                 r = service_load_sysv_path(s, path);
 759
 760                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 761                         /* Try Debian style xxx.sh source'able init scripts */
 762                         strcat(path, ".sh");
 763                         r = service_load_sysv_path(s, path);
 764                 }
 765
 766                 free(path);
 767
 768                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 769                         /* Try SUSE style boot.xxx init scripts */
 770
 771                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 772                                 return -ENOMEM;
 773
 774                         path[strlen(path)-8] = 0;
 775                         r = service_load_sysv_path(s, path);
 776                         free(path);
 777                 }
 778
 779                 if (r < 0)
 780                         return r;
 781
 782                 if ((s->meta.load_state != UNIT_STUB))
 783                         break;
 784         }
 785
 786         return 0;
 787 }
 788
 789 static int service_load_sysv(Service *s) {
 790         const char *t;
 791         Iterator i;
 792         int r;
 793
 794         assert(s);
 795
 796         /* Load service data from SysV init scripts, preferably with
 797          * LSB headers ... */
 798
 799         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 800                 return 0;
 801
 802         if ((t = s->meta.id))
 803                 if ((r = service_load_sysv_name(s, t)) < 0)
 804                         return r;
 805
 806         if (s->meta.load_state == UNIT_STUB)
 807                 SET_FOREACH(t, s->meta.names, i) {
 808                         if (t == s->meta.id)
 809                                 continue;
 810
 811                         if ((r = service_load_sysv_name(s, t)) < 0)
 812                                 return r;
 813
 814                         if (s->meta.load_state != UNIT_STUB)
 815                                 break;
 816                 }
 817
 818         return 0;
 819 }
 820
 821 static int service_add_bus_name(Service *s) {
 822         char *n;
 823         int r;
 824
 825         assert(s);
 826         assert(s->bus_name);
 827
 828         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 829                 return 0;
 830
 831         r = unit_merge_by_name(UNIT(s), n);
 832         free(n);
 833
 834         return r;
 835 }
 836
 837 static int service_verify(Service *s) {
 838         assert(s);
 839
 840         if (s->meta.load_state != UNIT_LOADED)
 841                 return 0;
 842
 843         if (!s->exec_command[SERVICE_EXEC_START]) {
 844                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
 845                 return -EINVAL;
 846         }
 847
 848         if (s->type != SERVICE_ONESHOT &&
 849             s->exec_command[SERVICE_EXEC_START]->command_next) {
 850                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
 851                 return -EINVAL;
 852         }
 853
 854         if (s->type == SERVICE_DBUS && !s->bus_name) {
 855                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
 856                 return -EINVAL;
 857         }
 858
 859         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 860                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 861                 return -EINVAL;
 862         }
 863
 864         return 0;
 865 }
 866
 867 static int service_add_default_dependencies(Service *s) {
 868         int r;
 869
 870         assert(s);
 871
 872         /* Add a number of automatic dependencies useful for the
 873          * majority of services. */
 874
 875         /* First, pull in base system */
 876         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
 877
 878                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 879                         return r;
 880
 881         } else if (s->meta.manager->running_as == MANAGER_SESSION) {
 882
 883                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
 884                         return r;
 885         }
 886
 887         /* Second, activate normal shutdown */
 888         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 889 }
 890
 891 static int service_load(Unit *u) {
 892         int r;
 893         Service *s = SERVICE(u);
 894
 895         assert(s);
 896
 897         /* Load a .service file */
 898         if ((r = unit_load_fragment(u)) < 0)
 899                 return r;
 900
 901         /* Load a classic init script as a fallback, if we couldn't find anything */
 902         if (u->meta.load_state == UNIT_STUB)
 903                 if ((r = service_load_sysv(s)) < 0)
 904                         return r;
 905
 906         /* Still nothing found? Then let's give up */
 907         if (u->meta.load_state == UNIT_STUB)
 908                 return -ENOENT;
 909
 910         /* We were able to load something, then let's add in the
 911          * dropin directories. */
 912         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 913                 return r;
 914
 915         /* This is a new unit? Then let's add in some extras */
 916         if (u->meta.load_state == UNIT_LOADED) {
 917                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 918                         return r;
 919
 920                 if ((r = unit_add_default_cgroup(u)) < 0)
 921                         return r;
 922
 923                 if ((r = sysv_fix_order(s)) < 0)
 924                         return r;
 925
 926                 if (s->bus_name) {
 927                         if ((r = service_add_bus_name(s)) < 0)
 928                                 return r;
 929
 930                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 931                                 return r;
 932                 }
 933
 934                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
 935                         s->notify_access = NOTIFY_MAIN;
 936
 937                 if (s->type == SERVICE_DBUS || s->bus_name)
 938                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
 939                                 return r;
 940
 941                 if (s->meta.default_dependencies)
 942                         if ((r = service_add_default_dependencies(s)) < 0)
 943                                 return r;
 944         }
 945
 946         return service_verify(s);
 947 }
 948
 949 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 950
 951         ServiceExecCommand c;
 952         Service *s = SERVICE(u);
 953         const char *prefix2;
 954         char *p2;
 955
 956         assert(s);
 957
 958         p2 = strappend(prefix, "\t");
 959         prefix2 = p2 ? p2 : prefix;
 960
 961         fprintf(f,
 962                 "%sService State: %s\n"
 963                 "%sPermissionsStartOnly: %s\n"
 964                 "%sRootDirectoryStartOnly: %s\n"
 965                 "%sRemainAfterExit: %s\n"
 966                 "%sType: %s\n"
 967                 "%sRestart: %s\n"
 968                 "%sNotifyAccess: %s\n",
 969                 prefix, service_state_to_string(s->state),
 970                 prefix, yes_no(s->permissions_start_only),
 971                 prefix, yes_no(s->root_directory_start_only),
 972                 prefix, yes_no(s->remain_after_exit),
 973                 prefix, service_type_to_string(s->type),
 974                 prefix, service_restart_to_string(s->restart),
 975                 prefix, notify_access_to_string(s->notify_access));
 976
 977         if (s->control_pid > 0)
 978                 fprintf(f,
 979                         "%sControl PID: %lu\n",
 980                         prefix, (unsigned long) s->control_pid);
 981
 982         if (s->main_pid > 0)
 983                 fprintf(f,
 984                         "%sMain PID: %lu\n",
 985                         prefix, (unsigned long) s->main_pid);
 986
 987         if (s->pid_file)
 988                 fprintf(f,
 989                         "%sPIDFile: %s\n",
 990                         prefix, s->pid_file);
 991
 992         if (s->bus_name)
 993                 fprintf(f,
 994                         "%sBusName: %s\n"
 995                         "%sBus Name Good: %s\n",
 996                         prefix, s->bus_name,
 997                         prefix, yes_no(s->bus_name_good));
 998
 999         exec_context_dump(&s->exec_context, f, prefix);
1000
1001         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1002
1003                 if (!s->exec_command[c])
1004                         continue;
1005
1006                 fprintf(f, "%s-> %s:\n",
1007                         prefix, service_exec_command_to_string(c));
1008
1009                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1010         }
1011
1012         if (s->sysv_path)
1013                 fprintf(f,
1014                         "%sSysV Init Script Path: %s\n"
1015                         "%sSysV Init Script has LSB Header: %s\n",
1016                         prefix, s->sysv_path,
1017                         prefix, yes_no(s->sysv_has_lsb));
1018
1019         if (s->sysv_start_priority >= 0)
1020                 fprintf(f,
1021                         "%sSysVStartPriority: %i\n"
1022                         "%sSysVEnabled: %s\n",
1023                         prefix, s->sysv_start_priority,
1024                         prefix, yes_no(s->sysv_enabled));
1025
1026         if (s->sysv_runlevels)
1027                 fprintf(f, "%sSysVRunLevels: %s\n",
1028                         prefix, s->sysv_runlevels);
1029
1030         if (s->status_text)
1031                 fprintf(f, "%sStatus Text: %s\n",
1032                         prefix, s->status_text);
1033
1034         free(p2);
1035 }
1036
1037 static int service_load_pid_file(Service *s) {
1038         char *k;
1039         int r;
1040         pid_t pid;
1041
1042         assert(s);
1043
1044         if (s->main_pid_known)
1045                 return 0;
1046
1047         assert(s->main_pid <= 0);
1048
1049         if (!s->pid_file)
1050                 return -ENOENT;
1051
1052         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1053                 return r;
1054
1055         r = parse_pid(k, &pid);
1056         free(k);
1057
1058         if (r < 0)
1059                 return r;
1060
1061         if (kill(pid, 0) < 0 && errno != EPERM) {
1062                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1063                             (unsigned long) pid, s->pid_file);
1064                 return -ESRCH;
1065         }
1066
1067         if ((r = service_set_main_pid(s, pid)) < 0)
1068                 return r;
1069
1070         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1071                 /* FIXME: we need to do something here */
1072                 return r;
1073
1074         return 0;
1075 }
1076
1077 static int service_get_sockets(Service *s, Set **_set) {
1078         Set *set;
1079         Iterator i;
1080         char *t;
1081         int r;
1082
1083         assert(s);
1084         assert(_set);
1085
1086         if (s->socket_fd >= 0)
1087                 return 0;
1088
1089         /* Collects all Socket objects that belong to this
1090          * service. Note that a service might have multiple sockets
1091          * via multiple names. */
1092
1093         if (!(set = set_new(NULL, NULL)))
1094                 return -ENOMEM;
1095
1096         SET_FOREACH(t, s->meta.names, i) {
1097                 char *k;
1098                 Unit *p;
1099
1100                 /* Look for all socket objects that go by any of our
1101                  * units and collect their fds */
1102
1103                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1104                         r = -ENOMEM;
1105                         goto fail;
1106                 }
1107
1108                 p = manager_get_unit(s->meta.manager, k);
1109                 free(k);
1110
1111                 if (!p)
1112                         continue;
1113
1114                 if ((r = set_put(set, p)) < 0)
1115                         goto fail;
1116         }
1117
1118         *_set = set;
1119         return 0;
1120
1121 fail:
1122         set_free(set);
1123         return r;
1124 }
1125
1126 static int service_notify_sockets_dead(Service *s) {
1127         Iterator i;
1128         Set *set;
1129         Socket *sock;
1130         int r;
1131
1132         assert(s);
1133
1134         if (s->socket_fd >= 0)
1135                 return 0;
1136
1137         /* Notifies all our sockets when we die */
1138         if ((r = service_get_sockets(s, &set)) < 0)
1139                 return r;
1140
1141         SET_FOREACH(sock, set, i)
1142                 socket_notify_service_dead(sock);
1143
1144         set_free(set);
1145
1146         return 0;
1147 }
1148
1149 static void service_set_state(Service *s, ServiceState state) {
1150         ServiceState old_state;
1151         assert(s);
1152
1153         old_state = s->state;
1154         s->state = state;
1155
1156         if (state != SERVICE_START_PRE &&
1157             state != SERVICE_START &&
1158             state != SERVICE_START_POST &&
1159             state != SERVICE_RELOAD &&
1160             state != SERVICE_STOP &&
1161             state != SERVICE_STOP_SIGTERM &&
1162             state != SERVICE_STOP_SIGKILL &&
1163             state != SERVICE_STOP_POST &&
1164             state != SERVICE_FINAL_SIGTERM &&
1165             state != SERVICE_FINAL_SIGKILL &&
1166             state != SERVICE_AUTO_RESTART)
1167                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1168
1169         if (state != SERVICE_START &&
1170             state != SERVICE_START_POST &&
1171             state != SERVICE_RUNNING &&
1172             state != SERVICE_RELOAD &&
1173             state != SERVICE_STOP &&
1174             state != SERVICE_STOP_SIGTERM &&
1175             state != SERVICE_STOP_SIGKILL)
1176                 service_unwatch_main_pid(s);
1177
1178         if (state != SERVICE_START_PRE &&
1179             state != SERVICE_START &&
1180             state != SERVICE_START_POST &&
1181             state != SERVICE_RELOAD &&
1182             state != SERVICE_STOP &&
1183             state != SERVICE_STOP_SIGTERM &&
1184             state != SERVICE_STOP_SIGKILL &&
1185             state != SERVICE_STOP_POST &&
1186             state != SERVICE_FINAL_SIGTERM &&
1187             state != SERVICE_FINAL_SIGKILL) {
1188                 service_unwatch_control_pid(s);
1189                 s->control_command = NULL;
1190                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1191         }
1192
1193         if (state == SERVICE_DEAD ||
1194             state == SERVICE_STOP ||
1195             state == SERVICE_STOP_SIGTERM ||
1196             state == SERVICE_STOP_SIGKILL ||
1197             state == SERVICE_STOP_POST ||
1198             state == SERVICE_FINAL_SIGTERM ||
1199             state == SERVICE_FINAL_SIGKILL ||
1200             state == SERVICE_FAILED ||
1201             state == SERVICE_AUTO_RESTART)
1202                 service_notify_sockets_dead(s);
1203
1204         if (state != SERVICE_START_PRE &&
1205             state != SERVICE_START &&
1206             state != SERVICE_START_POST &&
1207             state != SERVICE_RUNNING &&
1208             state != SERVICE_RELOAD &&
1209             state != SERVICE_STOP &&
1210             state != SERVICE_STOP_SIGTERM &&
1211             state != SERVICE_STOP_SIGKILL &&
1212             state != SERVICE_STOP_POST &&
1213             state != SERVICE_FINAL_SIGTERM &&
1214             state != SERVICE_FINAL_SIGKILL &&
1215             !(state == SERVICE_DEAD && s->meta.job)) {
1216                 service_close_socket_fd(s);
1217                 service_connection_unref(s);
1218         }
1219
1220         /* For the inactive states unit_notify() will trim the cgroup,
1221          * but for exit we have to do that ourselves... */
1222         if (state == SERVICE_EXITED)
1223                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1224
1225         if (old_state != state)
1226                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1227
1228         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1229 }
1230
1231 static int service_coldplug(Unit *u) {
1232         Service *s = SERVICE(u);
1233         int r;
1234
1235         assert(s);
1236         assert(s->state == SERVICE_DEAD);
1237
1238         if (s->deserialized_state != s->state) {
1239
1240                 if (s->deserialized_state == SERVICE_START_PRE ||
1241                     s->deserialized_state == SERVICE_START ||
1242                     s->deserialized_state == SERVICE_START_POST ||
1243                     s->deserialized_state == SERVICE_RELOAD ||
1244                     s->deserialized_state == SERVICE_STOP ||
1245                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1246                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1247                     s->deserialized_state == SERVICE_STOP_POST ||
1248                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1249                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1250                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1251
1252                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1253                                 usec_t k;
1254
1255                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1256
1257                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1258                                         return r;
1259                         }
1260                 }
1261
1262                 if ((s->deserialized_state == SERVICE_START &&
1263                      (s->type == SERVICE_FORKING ||
1264                       s->type == SERVICE_DBUS ||
1265                       s->type == SERVICE_ONESHOT ||
1266                       s->type == SERVICE_NOTIFY)) ||
1267                     s->deserialized_state == SERVICE_START_POST ||
1268                     s->deserialized_state == SERVICE_RUNNING ||
1269                     s->deserialized_state == SERVICE_RELOAD ||
1270                     s->deserialized_state == SERVICE_STOP ||
1271                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1272                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1273                         if (s->main_pid > 0)
1274                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1275                                         return r;
1276
1277                 if (s->deserialized_state == SERVICE_START_PRE ||
1278                     s->deserialized_state == SERVICE_START ||
1279                     s->deserialized_state == SERVICE_START_POST ||
1280                     s->deserialized_state == SERVICE_RELOAD ||
1281                     s->deserialized_state == SERVICE_STOP ||
1282                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1283                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1284                     s->deserialized_state == SERVICE_STOP_POST ||
1285                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1286                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1287                         if (s->control_pid > 0)
1288                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1289                                         return r;
1290
1291                 service_set_state(s, s->deserialized_state);
1292         }
1293
1294         return 0;
1295 }
1296
1297 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1298         Iterator i;
1299         int r;
1300         int *rfds = NULL;
1301         unsigned rn_fds = 0;
1302         Set *set;
1303         Socket *sock;
1304
1305         assert(s);
1306         assert(fds);
1307         assert(n_fds);
1308
1309         if (s->socket_fd >= 0)
1310                 return 0;
1311
1312         if ((r = service_get_sockets(s, &set)) < 0)
1313                 return r;
1314
1315         SET_FOREACH(sock, set, i) {
1316                 int *cfds;
1317                 unsigned cn_fds;
1318
1319                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1320                         goto fail;
1321
1322                 if (!cfds)
1323                         continue;
1324
1325                 if (!rfds) {
1326                         rfds = cfds;
1327                         rn_fds = cn_fds;
1328                 } else {
1329                         int *t;
1330
1331                         if (!(t = new(int, rn_fds+cn_fds))) {
1332                                 free(cfds);
1333                                 r = -ENOMEM;
1334                                 goto fail;
1335                         }
1336
1337                         memcpy(t, rfds, rn_fds);
1338                         memcpy(t+rn_fds, cfds, cn_fds);
1339                         free(rfds);
1340                         free(cfds);
1341
1342                         rfds = t;
1343                         rn_fds = rn_fds+cn_fds;
1344                 }
1345         }
1346
1347         *fds = rfds;
1348         *n_fds = rn_fds;
1349
1350         set_free(set);
1351
1352         return 0;
1353
1354 fail:
1355         set_free(set);
1356         free(rfds);
1357
1358         return r;
1359 }
1360
1361 static int service_spawn(
1362                 Service *s,
1363                 ExecCommand *c,
1364                 bool timeout,
1365                 bool pass_fds,
1366                 bool apply_permissions,
1367                 bool apply_chroot,
1368                 bool apply_tty_stdin,
1369                 bool set_notify_socket,
1370                 pid_t *_pid) {
1371
1372         pid_t pid;
1373         int r;
1374         int *fds = NULL, *fdsbuf = NULL;
1375         unsigned n_fds = 0, n_env = 0;
1376         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1377
1378         assert(s);
1379         assert(c);
1380         assert(_pid);
1381
1382         if (pass_fds ||
1383             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1384             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1385             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1386
1387                 if (s->socket_fd >= 0) {
1388                         fds = &s->socket_fd;
1389                         n_fds = 1;
1390                 } else {
1391                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1392                                 goto fail;
1393
1394                         fds = fdsbuf;
1395                 }
1396         }
1397
1398         if (timeout && s->timeout_usec) {
1399                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1400                         goto fail;
1401         } else
1402                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1403
1404         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1405                 r = -ENOMEM;
1406                 goto fail;
1407         }
1408
1409         if (!(our_env = new0(char*, 3))) {
1410                 r = -ENOMEM;
1411                 goto fail;
1412         }
1413
1414         if (set_notify_socket)
1415                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1416                         r = -ENOMEM;
1417                         goto fail;
1418                 }
1419
1420         if (s->main_pid > 0)
1421                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1422                         r = -ENOMEM;
1423                         goto fail;
1424                 }
1425
1426         if (!(final_env = strv_env_merge(2,
1427                                          s->meta.manager->environment,
1428                                          our_env,
1429                                          NULL))) {
1430                 r = -ENOMEM;
1431                 goto fail;
1432         }
1433
1434         r = exec_spawn(c,
1435                        argv,
1436                        &s->exec_context,
1437                        fds, n_fds,
1438                        final_env,
1439                        apply_permissions,
1440                        apply_chroot,
1441                        apply_tty_stdin,
1442                        s->meta.manager->confirm_spawn,
1443                        s->meta.cgroup_bondings,
1444                        &pid);
1445
1446         if (r < 0)
1447                 goto fail;
1448
1449
1450         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1451                 /* FIXME: we need to do something here */
1452                 goto fail;
1453
1454         free(fdsbuf);
1455         strv_free(argv);
1456         strv_free(our_env);
1457         strv_free(final_env);
1458
1459         *_pid = pid;
1460
1461         return 0;
1462
1463 fail:
1464         free(fdsbuf);
1465         strv_free(argv);
1466         strv_free(our_env);
1467         strv_free(final_env);
1468
1469         if (timeout)
1470                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1471
1472         return r;
1473 }
1474
1475 static int main_pid_good(Service *s) {
1476         assert(s);
1477
1478         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1479          * don't know */
1480
1481         /* If we know the pid file, then lets just check if it is
1482          * still valid */
1483         if (s->main_pid_known)
1484                 return s->main_pid > 0;
1485
1486         /* We don't know the pid */
1487         return -EAGAIN;
1488 }
1489
1490 static int control_pid_good(Service *s) {
1491         assert(s);
1492
1493         return s->control_pid > 0;
1494 }
1495
1496 static int cgroup_good(Service *s) {
1497         int r;
1498
1499         assert(s);
1500
1501         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1502                 return r;
1503
1504         return !r;
1505 }
1506
1507 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1508         int r;
1509         assert(s);
1510
1511         if (!success)
1512                 s->failure = true;
1513
1514         if (allow_restart &&
1515             !s->forbid_restart &&
1516             (s->restart == SERVICE_RESTART_ALWAYS ||
1517              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1518
1519                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1520                         goto fail;
1521
1522                 service_set_state(s, SERVICE_AUTO_RESTART);
1523         } else
1524                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1525
1526         s->forbid_restart = false;
1527
1528         return;
1529
1530 fail:
1531         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1532         service_enter_dead(s, false, false);
1533 }
1534
1535 static void service_enter_signal(Service *s, ServiceState state, bool success);
1536
1537 static void service_enter_stop_post(Service *s, bool success) {
1538         int r;
1539         assert(s);
1540
1541         if (!success)
1542                 s->failure = true;
1543
1544         service_unwatch_control_pid(s);
1545
1546         s->control_command_id = SERVICE_EXEC_STOP_POST;
1547         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1548                 if ((r = service_spawn(s,
1549                                        s->control_command,
1550                                        true,
1551                                        false,
1552                                        !s->permissions_start_only,
1553                                        !s->root_directory_start_only,
1554                                        true,
1555                                        false,
1556                                        &s->control_pid)) < 0)
1557                         goto fail;
1558
1559
1560                 service_set_state(s, SERVICE_STOP_POST);
1561         } else
1562                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1563
1564         return;
1565
1566 fail:
1567         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1568         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1569 }
1570
1571 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1572         int r;
1573         Set *pid_set = NULL;
1574         bool wait_for_exit = false;
1575
1576         assert(s);
1577
1578         if (!success)
1579                 s->failure = true;
1580
1581         if (s->exec_context.kill_mode != KILL_NONE) {
1582                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1583
1584                 if (s->main_pid > 0) {
1585                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1586                                  -s->main_pid :
1587                                  s->main_pid, sig) < 0 && errno != ESRCH)
1588
1589                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1590                         else
1591                                 wait_for_exit = true;
1592                 }
1593
1594                 if (s->control_pid > 0) {
1595                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1596                                  -s->control_pid :
1597                                  s->control_pid, sig) < 0 && errno != ESRCH)
1598
1599                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1600                         else
1601                                 wait_for_exit = true;
1602                 }
1603
1604                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1605
1606                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1607                                 r = -ENOMEM;
1608                                 goto fail;
1609                         }
1610
1611                         /* Exclude the main/control pids from being killed via the cgroup */
1612                         if (s->main_pid > 0)
1613                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1614                                         goto fail;
1615
1616                         if (s->control_pid > 0)
1617                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1618                                         goto fail;
1619
1620                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1621                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1622                                         log_warning("Failed to kill control group: %s", strerror(-r));
1623                         } else if (r > 0)
1624                                 wait_for_exit = true;
1625
1626                         set_free(pid_set);
1627                 }
1628         }
1629
1630         if (wait_for_exit) {
1631                 if (s->timeout_usec > 0)
1632                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1633                                 goto fail;
1634
1635                 service_set_state(s, state);
1636         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1637                 service_enter_stop_post(s, true);
1638         else
1639                 service_enter_dead(s, true, true);
1640
1641         return;
1642
1643 fail:
1644         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1645
1646         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1647                 service_enter_stop_post(s, false);
1648         else
1649                 service_enter_dead(s, false, true);
1650
1651         if (pid_set)
1652                 set_free(pid_set);
1653 }
1654
1655 static void service_enter_stop(Service *s, bool success) {
1656         int r;
1657
1658         assert(s);
1659
1660         if (!success)
1661                 s->failure = true;
1662
1663         service_unwatch_control_pid(s);
1664
1665         s->control_command_id = SERVICE_EXEC_STOP;
1666         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1667                 if ((r = service_spawn(s,
1668                                        s->control_command,
1669                                        true,
1670                                        false,
1671                                        !s->permissions_start_only,
1672                                        !s->root_directory_start_only,
1673                                        false,
1674                                        false,
1675                                        &s->control_pid)) < 0)
1676                         goto fail;
1677
1678                 service_set_state(s, SERVICE_STOP);
1679         } else
1680                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1681
1682         return;
1683
1684 fail:
1685         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1686         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1687 }
1688
1689 static void service_enter_running(Service *s, bool success) {
1690         int main_pid_ok, cgroup_ok;
1691         assert(s);
1692
1693         if (!success)
1694                 s->failure = true;
1695
1696         main_pid_ok = main_pid_good(s);
1697         cgroup_ok = cgroup_good(s);
1698
1699         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1700             (s->bus_name_good || s->type != SERVICE_DBUS))
1701                 service_set_state(s, SERVICE_RUNNING);
1702         else if (s->remain_after_exit)
1703                 service_set_state(s, SERVICE_EXITED);
1704         else
1705                 service_enter_stop(s, true);
1706 }
1707
1708 static void service_enter_start_post(Service *s) {
1709         int r;
1710         assert(s);
1711
1712         service_unwatch_control_pid(s);
1713
1714         s->control_command_id = SERVICE_EXEC_START_POST;
1715         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1716                 if ((r = service_spawn(s,
1717                                        s->control_command,
1718                                        true,
1719                                        false,
1720                                        !s->permissions_start_only,
1721                                        !s->root_directory_start_only,
1722                                        false,
1723                                        false,
1724                                        &s->control_pid)) < 0)
1725                         goto fail;
1726
1727                 service_set_state(s, SERVICE_START_POST);
1728         } else
1729                 service_enter_running(s, true);
1730
1731         return;
1732
1733 fail:
1734         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1735         service_enter_stop(s, false);
1736 }
1737
1738 static void service_enter_start(Service *s) {
1739         pid_t pid;
1740         int r;
1741
1742         assert(s);
1743
1744         assert(s->exec_command[SERVICE_EXEC_START]);
1745         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1746
1747         if (s->type == SERVICE_FORKING)
1748                 service_unwatch_control_pid(s);
1749         else
1750                 service_unwatch_main_pid(s);
1751
1752         s->control_command_id = SERVICE_EXEC_START;
1753         s->control_command = s->exec_command[SERVICE_EXEC_START];
1754
1755         if ((r = service_spawn(s,
1756                                s->control_command,
1757                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1758                                true,
1759                                true,
1760                                true,
1761                                true,
1762                                s->notify_access != NOTIFY_NONE,
1763                                &pid)) < 0)
1764                 goto fail;
1765
1766         if (s->type == SERVICE_SIMPLE) {
1767                 /* For simple services we immediately start
1768                  * the START_POST binaries. */
1769
1770                 service_set_main_pid(s, pid);
1771                 service_enter_start_post(s);
1772
1773         } else  if (s->type == SERVICE_FORKING) {
1774
1775                 /* For forking services we wait until the start
1776                  * process exited. */
1777
1778                 s->control_pid = pid;
1779                 service_set_state(s, SERVICE_START);
1780
1781         } else if (s->type == SERVICE_ONESHOT ||
1782                    s->type == SERVICE_DBUS ||
1783                    s->type == SERVICE_NOTIFY) {
1784
1785                 /* For oneshot services we wait until the start
1786                  * process exited, too, but it is our main process. */
1787
1788                 /* For D-Bus services we know the main pid right away,
1789                  * but wait for the bus name to appear on the
1790                  * bus. Notify services are similar. */
1791
1792                 service_set_main_pid(s, pid);
1793                 service_set_state(s, SERVICE_START);
1794         } else
1795                 assert_not_reached("Unknown service type");
1796
1797         return;
1798
1799 fail:
1800         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
1801         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1802 }
1803
1804 static void service_enter_start_pre(Service *s) {
1805         int r;
1806
1807         assert(s);
1808
1809         service_unwatch_control_pid(s);
1810
1811         s->control_command_id = SERVICE_EXEC_START_PRE;
1812         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1813                 if ((r = service_spawn(s,
1814                                        s->control_command,
1815                                        true,
1816                                        false,
1817                                        !s->permissions_start_only,
1818                                        !s->root_directory_start_only,
1819                                        true,
1820                                        false,
1821                                        &s->control_pid)) < 0)
1822                         goto fail;
1823
1824                 service_set_state(s, SERVICE_START_PRE);
1825         } else
1826                 service_enter_start(s);
1827
1828         return;
1829
1830 fail:
1831         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1832         service_enter_dead(s, false, true);
1833 }
1834
1835 static void service_enter_restart(Service *s) {
1836         int r;
1837         DBusError error;
1838
1839         assert(s);
1840         dbus_error_init(&error);
1841
1842         service_enter_dead(s, true, false);
1843
1844         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
1845                 goto fail;
1846
1847         log_debug("%s scheduled restart job.", s->meta.id);
1848         return;
1849
1850 fail:
1851         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
1852         service_enter_dead(s, false, false);
1853
1854         dbus_error_free(&error);
1855 }
1856
1857 static void service_enter_reload(Service *s) {
1858         int r;
1859
1860         assert(s);
1861
1862         service_unwatch_control_pid(s);
1863
1864         s->control_command_id = SERVICE_EXEC_RELOAD;
1865         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1866                 if ((r = service_spawn(s,
1867                                        s->control_command,
1868                                        true,
1869                                        false,
1870                                        !s->permissions_start_only,
1871                                        !s->root_directory_start_only,
1872                                        false,
1873                                        false,
1874                                        &s->control_pid)) < 0)
1875                         goto fail;
1876
1877                 service_set_state(s, SERVICE_RELOAD);
1878         } else
1879                 service_enter_running(s, true);
1880
1881         return;
1882
1883 fail:
1884         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
1885         service_enter_stop(s, false);
1886 }
1887
1888 static void service_run_next_control(Service *s, bool success) {
1889         int r;
1890
1891         assert(s);
1892         assert(s->control_command);
1893         assert(s->control_command->command_next);
1894
1895         if (!success)
1896                 s->failure = true;
1897
1898         assert(s->control_command_id != SERVICE_EXEC_START);
1899
1900         s->control_command = s->control_command->command_next;
1901         service_unwatch_control_pid(s);
1902
1903         if ((r = service_spawn(s,
1904                                s->control_command,
1905                                true,
1906                                false,
1907                                !s->permissions_start_only,
1908                                !s->root_directory_start_only,
1909                                s->control_command_id == SERVICE_EXEC_START_PRE ||
1910                                s->control_command_id == SERVICE_EXEC_STOP_POST,
1911                                false,
1912                                &s->control_pid)) < 0)
1913                 goto fail;
1914
1915         return;
1916
1917 fail:
1918         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
1919
1920         if (s->state == SERVICE_START_PRE)
1921                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1922         else if (s->state == SERVICE_STOP)
1923                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1924         else if (s->state == SERVICE_STOP_POST)
1925                 service_enter_dead(s, false, true);
1926         else
1927                 service_enter_stop(s, false);
1928 }
1929
1930 static void service_run_next_main(Service *s, bool success) {
1931         pid_t pid;
1932         int r;
1933
1934         assert(s);
1935         assert(s->control_command);
1936         assert(s->control_command->command_next);
1937
1938         if (!success)
1939                 s->failure = true;
1940
1941         assert(s->control_command_id == SERVICE_EXEC_START);
1942         assert(s->type == SERVICE_ONESHOT);
1943
1944         s->control_command = s->control_command->command_next;
1945         service_unwatch_main_pid(s);
1946
1947         if ((r = service_spawn(s,
1948                                s->control_command,
1949                                false,
1950                                true,
1951                                true,
1952                                true,
1953                                true,
1954                                s->notify_access != NOTIFY_NONE,
1955                                &pid)) < 0)
1956                 goto fail;
1957
1958         service_set_main_pid(s, pid);
1959
1960         return;
1961
1962 fail:
1963         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
1964         service_enter_stop(s, false);
1965 }
1966
1967 static int service_start(Unit *u) {
1968         Service *s = SERVICE(u);
1969
1970         assert(s);
1971
1972         /* We cannot fulfill this request right now, try again later
1973          * please! */
1974         if (s->state == SERVICE_STOP ||
1975             s->state == SERVICE_STOP_SIGTERM ||
1976             s->state == SERVICE_STOP_SIGKILL ||
1977             s->state == SERVICE_STOP_POST ||
1978             s->state == SERVICE_FINAL_SIGTERM ||
1979             s->state == SERVICE_FINAL_SIGKILL)
1980                 return -EAGAIN;
1981
1982         /* Already on it! */
1983         if (s->state == SERVICE_START_PRE ||
1984             s->state == SERVICE_START ||
1985             s->state == SERVICE_START_POST)
1986                 return 0;
1987
1988         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
1989
1990         /* Make sure we don't enter a busy loop of some kind. */
1991         if (!ratelimit_test(&s->ratelimit)) {
1992                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1993                 return -ECANCELED;
1994         }
1995
1996         if ((s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1997              s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1998              s->exec_context.std_error == EXEC_OUTPUT_SOCKET) &&
1999             s->socket_fd < 0) {
2000                 log_warning("%s can only be started with a per-connection socket.", u->meta.id);
2001                 return -EINVAL;
2002         }
2003
2004         s->failure = false;
2005         s->main_pid_known = false;
2006         s->forbid_restart = false;
2007
2008         service_enter_start_pre(s);
2009         return 0;
2010 }
2011
2012 static int service_stop(Unit *u) {
2013         Service *s = SERVICE(u);
2014
2015         assert(s);
2016
2017         /* This is a user request, so don't do restarts on this
2018          * shutdown. */
2019         s->forbid_restart = true;
2020
2021         /* Already on it */
2022         if (s->state == SERVICE_STOP ||
2023             s->state == SERVICE_STOP_SIGTERM ||
2024             s->state == SERVICE_STOP_SIGKILL ||
2025             s->state == SERVICE_STOP_POST ||
2026             s->state == SERVICE_FINAL_SIGTERM ||
2027             s->state == SERVICE_FINAL_SIGKILL)
2028                 return 0;
2029
2030         /* Don't allow a restart */
2031         if (s->state == SERVICE_AUTO_RESTART) {
2032                 service_set_state(s, SERVICE_DEAD);
2033                 return 0;
2034         }
2035
2036         /* If there's already something running we go directly into
2037          * kill mode. */
2038         if (s->state == SERVICE_START_PRE ||
2039             s->state == SERVICE_START ||
2040             s->state == SERVICE_START_POST ||
2041             s->state == SERVICE_RELOAD) {
2042                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2043                 return 0;
2044         }
2045
2046         assert(s->state == SERVICE_RUNNING ||
2047                s->state == SERVICE_EXITED);
2048
2049         service_enter_stop(s, true);
2050         return 0;
2051 }
2052
2053 static int service_reload(Unit *u) {
2054         Service *s = SERVICE(u);
2055
2056         assert(s);
2057
2058         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2059
2060         service_enter_reload(s);
2061         return 0;
2062 }
2063
2064 static bool service_can_reload(Unit *u) {
2065         Service *s = SERVICE(u);
2066
2067         assert(s);
2068
2069         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2070 }
2071
2072 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2073         Service *s = SERVICE(u);
2074
2075         assert(u);
2076         assert(f);
2077         assert(fds);
2078
2079         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2080         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2081
2082         if (s->control_pid > 0)
2083                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2084
2085         if (s->main_pid_known && s->main_pid > 0)
2086                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2087
2088         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2089
2090         if (s->status_text)
2091                 unit_serialize_item(u, f, "status-text", s->status_text);
2092
2093         /* There's a minor uncleanliness here: if there are multiple
2094          * commands attached here, we will start from the first one
2095          * again */
2096         if (s->control_command_id >= 0)
2097                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2098
2099         if (s->socket_fd >= 0) {
2100                 int copy;
2101
2102                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2103                         return copy;
2104
2105                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2106         }
2107
2108         if (s->main_exec_status.pid > 0) {
2109                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2110
2111                 if (s->main_exec_status.start_timestamp.realtime > 0) {
2112                         unit_serialize_item_format(u, f, "main-exec-status-start-realtime",
2113                                                    "%llu", (unsigned long long) s->main_exec_status.start_timestamp.realtime);
2114
2115                         unit_serialize_item_format(u, f, "main-exec-status-start-monotonic",
2116                                                    "%llu", (unsigned long long) s->main_exec_status.start_timestamp.monotonic);
2117                 }
2118
2119                 if (s->main_exec_status.exit_timestamp.realtime > 0) {
2120                         unit_serialize_item_format(u, f, "main-exec-status-exit-realtime",
2121                                                    "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.realtime);
2122                         unit_serialize_item_format(u, f, "main-exec-status-exit-monotonic",
2123                                                    "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.monotonic);
2124
2125                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2126                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2127                 }
2128         }
2129
2130         return 0;
2131 }
2132
2133 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2134         Service *s = SERVICE(u);
2135
2136         assert(u);
2137         assert(key);
2138         assert(value);
2139         assert(fds);
2140
2141         if (streq(key, "state")) {
2142                 ServiceState state;
2143
2144                 if ((state = service_state_from_string(value)) < 0)
2145                         log_debug("Failed to parse state value %s", value);
2146                 else
2147                         s->deserialized_state = state;
2148         } else if (streq(key, "failure")) {
2149                 int b;
2150
2151                 if ((b = parse_boolean(value)) < 0)
2152                         log_debug("Failed to parse failure value %s", value);
2153                 else
2154                         s->failure = b || s->failure;
2155         } else if (streq(key, "control-pid")) {
2156                 pid_t pid;
2157
2158                 if (parse_pid(value, &pid) < 0)
2159                         log_debug("Failed to parse control-pid value %s", value);
2160                 else
2161                         s->control_pid = pid;
2162         } else if (streq(key, "main-pid")) {
2163                 pid_t pid;
2164
2165                 if (parse_pid(value, &pid) < 0)
2166                         log_debug("Failed to parse main-pid value %s", value);
2167                 else
2168                         service_set_main_pid(s, (pid_t) pid);
2169         } else if (streq(key, "main-pid-known")) {
2170                 int b;
2171
2172                 if ((b = parse_boolean(value)) < 0)
2173                         log_debug("Failed to parse main-pid-known value %s", value);
2174                 else
2175                         s->main_pid_known = b;
2176         } else if (streq(key, "status-text")) {
2177                 char *t;
2178
2179                 if ((t = strdup(value))) {
2180                         free(s->status_text);
2181                         s->status_text = t;
2182                 }
2183
2184         } else if (streq(key, "control-command")) {
2185                 ServiceExecCommand id;
2186
2187                 if ((id = service_exec_command_from_string(value)) < 0)
2188                         log_debug("Failed to parse exec-command value %s", value);
2189                 else {
2190                         s->control_command_id = id;
2191                         s->control_command = s->exec_command[id];
2192                 }
2193         } else if (streq(key, "socket-fd")) {
2194                 int fd;
2195
2196                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2197                         log_debug("Failed to parse socket-fd value %s", value);
2198                 else {
2199
2200                         if (s->socket_fd >= 0)
2201                                 close_nointr_nofail(s->socket_fd);
2202                         s->socket_fd = fdset_remove(fds, fd);
2203                 }
2204         } else if (streq(key, "main-exec-status-pid")) {
2205                 pid_t pid;
2206
2207                 if (parse_pid(value, &pid) < 0)
2208                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2209                 else
2210                         s->main_exec_status.pid = pid;
2211         } else if (streq(key, "main-exec-status-code")) {
2212                 int i;
2213
2214                 if (safe_atoi(value, &i) < 0)
2215                         log_debug("Failed to parse main-exec-status-code value %s", value);
2216                 else
2217                         s->main_exec_status.code = i;
2218         } else if (streq(key, "main-exec-status-status")) {
2219                 int i;
2220
2221                 if (safe_atoi(value, &i) < 0)
2222                         log_debug("Failed to parse main-exec-status-status value %s", value);
2223                 else
2224                         s->main_exec_status.status = i;
2225         } else if (streq(key, "main-exec-status-start-realtime")) {
2226                 uint64_t k;
2227
2228                 if (safe_atou64(value, &k) < 0)
2229                         log_debug("Failed to parse main-exec-status-start-realtime value %s", value);
2230                 else
2231                         s->main_exec_status.start_timestamp.realtime = (usec_t) k;
2232         } else if (streq(key, "main-exec-status-start-monotonic")) {
2233                 uint64_t k;
2234
2235                 if (safe_atou64(value, &k) < 0)
2236                         log_debug("Failed to parse main-exec-status-start-monotonic value %s", value);
2237                 else
2238                         s->main_exec_status.start_timestamp.monotonic = (usec_t) k;
2239         } else if (streq(key, "main-exec-status-exit-realtime")) {
2240                 uint64_t k;
2241
2242                 if (safe_atou64(value, &k) < 0)
2243                         log_debug("Failed to parse main-exec-status-exit-realtime value %s", value);
2244                 else
2245                         s->main_exec_status.exit_timestamp.realtime = (usec_t) k;
2246         } else if (streq(key, "main-exec-status-exit-monotonic")) {
2247                 uint64_t k;
2248
2249                 if (safe_atou64(value, &k) < 0)
2250                         log_debug("Failed to parse main-exec-status-exit-monotonic value %s", value);
2251                 else
2252                         s->main_exec_status.exit_timestamp.monotonic = (usec_t) k;
2253         } else
2254                 log_debug("Unknown serialization key '%s'", key);
2255
2256         return 0;
2257 }
2258
2259 static UnitActiveState service_active_state(Unit *u) {
2260         assert(u);
2261
2262         return state_translation_table[SERVICE(u)->state];
2263 }
2264
2265 static const char *service_sub_state_to_string(Unit *u) {
2266         assert(u);
2267
2268         return service_state_to_string(SERVICE(u)->state);
2269 }
2270
2271 static bool service_check_gc(Unit *u) {
2272         Service *s = SERVICE(u);
2273
2274         assert(s);
2275
2276         return !!s->sysv_path;
2277 }
2278
2279 static bool service_check_snapshot(Unit *u) {
2280         Service *s = SERVICE(u);
2281
2282         assert(s);
2283
2284         return !s->got_socket_fd;
2285 }
2286
2287 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2288         Service *s = SERVICE(u);
2289         bool success;
2290
2291         assert(s);
2292         assert(pid >= 0);
2293
2294         if (s->sysv_path)
2295                 success = is_clean_exit_lsb(code, status);
2296         else
2297                 success = is_clean_exit(code, status);
2298
2299         if (s->main_pid == pid) {
2300
2301                 s->main_pid = 0;
2302                 exec_status_exit(&s->main_exec_status, pid, code, status);
2303
2304                 if (s->type != SERVICE_FORKING && s->control_command) {
2305                         s->control_command->exec_status = s->main_exec_status;
2306
2307                         if (s->control_command->ignore)
2308                                 success = true;
2309                 }
2310
2311                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2312                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2313                 s->failure = s->failure || !success;
2314
2315                 if (s->control_command &&
2316                     s->control_command->command_next &&
2317                     success) {
2318
2319                         /* There is another command to *
2320                          * execute, so let's do that. */
2321
2322                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2323                         service_run_next_main(s, success);
2324
2325                 } else {
2326
2327                         /* The service exited, so the service is officially
2328                          * gone. */
2329
2330                         s->control_command = NULL;
2331                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2332
2333                         switch (s->state) {
2334
2335                         case SERVICE_START_POST:
2336                         case SERVICE_RELOAD:
2337                         case SERVICE_STOP:
2338                                 /* Need to wait until the operation is
2339                                  * done */
2340                                 break;
2341
2342                         case SERVICE_START:
2343                                 if (s->type == SERVICE_ONESHOT) {
2344                                         /* This was our main goal, so let's go on */
2345                                         if (success)
2346                                                 service_enter_start_post(s);
2347                                         else
2348                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2349                                         break;
2350                                 } else {
2351                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2352
2353                                         /* Fall through */
2354                                 }
2355
2356                         case SERVICE_RUNNING:
2357                                 service_enter_running(s, success);
2358                                 break;
2359
2360                         case SERVICE_STOP_SIGTERM:
2361                         case SERVICE_STOP_SIGKILL:
2362
2363                                 if (!control_pid_good(s))
2364                                         service_enter_stop_post(s, success);
2365
2366                                 /* If there is still a control process, wait for that first */
2367                                 break;
2368
2369                         default:
2370                                 assert_not_reached("Uh, main process died at wrong time.");
2371                         }
2372                 }
2373
2374         } else if (s->control_pid == pid) {
2375
2376                 s->control_pid = 0;
2377
2378                 if (s->control_command) {
2379                         exec_status_exit(&s->control_command->exec_status, pid, code, status);
2380
2381                         if (s->control_command->ignore)
2382                                 success = true;
2383                 }
2384
2385                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2386                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2387                 s->failure = s->failure || !success;
2388
2389                 if (s->control_command &&
2390                     s->control_command->command_next &&
2391                     success) {
2392
2393                         /* There is another command to *
2394                          * execute, so let's do that. */
2395
2396                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2397                         service_run_next_control(s, success);
2398
2399                 } else {
2400                         /* No further commands for this step, so let's
2401                          * figure out what to do next */
2402
2403                         s->control_command = NULL;
2404                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2405
2406                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2407
2408                         switch (s->state) {
2409
2410                         case SERVICE_START_PRE:
2411                                 if (success)
2412                                         service_enter_start(s);
2413                                 else
2414                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2415                                 break;
2416
2417                         case SERVICE_START:
2418                                 assert(s->type == SERVICE_FORKING);
2419
2420                                 /* Let's try to load the pid
2421                                  * file here if we can. We
2422                                  * ignore the return value,
2423                                  * since the PID file might
2424                                  * actually be created by a
2425                                  * START_POST script */
2426
2427                                 if (success) {
2428                                         if (s->pid_file)
2429                                                 service_load_pid_file(s);
2430
2431                                         service_enter_start_post(s);
2432                                 } else
2433                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2434
2435                                 break;
2436
2437                         case SERVICE_START_POST:
2438                                 if (success && s->pid_file && !s->main_pid_known) {
2439                                         int r;
2440
2441                                         /* Hmm, let's see if we can
2442                                          * load the pid now after the
2443                                          * start-post scripts got
2444                                          * executed. */
2445
2446                                         if ((r = service_load_pid_file(s)) < 0)
2447                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2448                                 }
2449
2450                                 /* Fall through */
2451
2452                         case SERVICE_RELOAD:
2453                                 if (success)
2454                                         service_enter_running(s, true);
2455                                 else
2456                                         service_enter_stop(s, false);
2457
2458                                 break;
2459
2460                         case SERVICE_STOP:
2461                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2462                                 break;
2463
2464                         case SERVICE_STOP_SIGTERM:
2465                         case SERVICE_STOP_SIGKILL:
2466                                 if (main_pid_good(s) <= 0)
2467                                         service_enter_stop_post(s, success);
2468
2469                                 /* If there is still a service
2470                                  * process around, wait until
2471                                  * that one quit, too */
2472                                 break;
2473
2474                         case SERVICE_STOP_POST:
2475                         case SERVICE_FINAL_SIGTERM:
2476                         case SERVICE_FINAL_SIGKILL:
2477                                 service_enter_dead(s, success, true);
2478                                 break;
2479
2480                         default:
2481                                 assert_not_reached("Uh, control process died at wrong time.");
2482                         }
2483                 }
2484         }
2485
2486         /* Notify clients about changed exit status */
2487         unit_add_to_dbus_queue(u);
2488 }
2489
2490 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2491         Service *s = SERVICE(u);
2492
2493         assert(s);
2494         assert(elapsed == 1);
2495
2496         assert(w == &s->timer_watch);
2497
2498         switch (s->state) {
2499
2500         case SERVICE_START_PRE:
2501         case SERVICE_START:
2502                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2503                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2504                 break;
2505
2506         case SERVICE_START_POST:
2507         case SERVICE_RELOAD:
2508                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2509                 service_enter_stop(s, false);
2510                 break;
2511
2512         case SERVICE_STOP:
2513                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2514                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2515                 break;
2516
2517         case SERVICE_STOP_SIGTERM:
2518                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2519                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2520                 break;
2521
2522         case SERVICE_STOP_SIGKILL:
2523                 /* Uh, wie sent a SIGKILL and it is still not gone?
2524                  * Must be something we cannot kill, so let's just be
2525                  * weirded out and continue */
2526
2527                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2528                 service_enter_stop_post(s, false);
2529                 break;
2530
2531         case SERVICE_STOP_POST:
2532                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2533                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2534                 break;
2535
2536         case SERVICE_FINAL_SIGTERM:
2537                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2538                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2539                 break;
2540
2541         case SERVICE_FINAL_SIGKILL:
2542                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2543                 service_enter_dead(s, false, true);
2544                 break;
2545
2546         case SERVICE_AUTO_RESTART:
2547                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2548                 service_enter_restart(s);
2549                 break;
2550
2551         default:
2552                 assert_not_reached("Timeout at wrong time.");
2553         }
2554 }
2555
2556 static void service_cgroup_notify_event(Unit *u) {
2557         Service *s = SERVICE(u);
2558
2559         assert(u);
2560
2561         log_debug("%s: cgroup is empty", u->meta.id);
2562
2563         switch (s->state) {
2564
2565                 /* Waiting for SIGCHLD is usually more interesting,
2566                  * because it includes return codes/signals. Which is
2567                  * why we ignore the cgroup events for most cases,
2568                  * except when we don't know pid which to expect the
2569                  * SIGCHLD for. */
2570
2571         case SERVICE_RUNNING:
2572                 service_enter_running(s, true);
2573                 break;
2574
2575         case SERVICE_STOP_SIGTERM:
2576         case SERVICE_STOP_SIGKILL:
2577                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2578                         service_enter_stop_post(s, true);
2579
2580                 break;
2581
2582         default:
2583                 ;
2584         }
2585 }
2586
2587 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2588         Service *s = SERVICE(u);
2589         const char *e;
2590
2591         assert(u);
2592
2593         if (s->notify_access == NOTIFY_NONE) {
2594                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2595                             u->meta.id, (unsigned long) pid);
2596                 return;
2597         }
2598
2599         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2600                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2601                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2602                 return;
2603         }
2604
2605         log_debug("%s: Got message", u->meta.id);
2606
2607         /* Interpret MAINPID= */
2608         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2609             (s->state == SERVICE_START ||
2610              s->state == SERVICE_START_POST ||
2611              s->state == SERVICE_RUNNING ||
2612              s->state == SERVICE_RELOAD)) {
2613
2614                 if (parse_pid(e + 8, &pid) < 0)
2615                         log_warning("Failed to parse notification message %s", e);
2616                 else {
2617                         log_debug("%s: got %s", u->meta.id, e);
2618                         service_set_main_pid(s, pid);
2619                 }
2620         }
2621
2622         /* Interpret READY= */
2623         if (s->type == SERVICE_NOTIFY &&
2624             s->state == SERVICE_START &&
2625             strv_find(tags, "READY=1")) {
2626                 log_debug("%s: got READY=1", u->meta.id);
2627
2628                 service_enter_start_post(s);
2629         }
2630
2631         /* Interpret STATUS= */
2632         if ((e = strv_find_prefix(tags, "STATUS="))) {
2633                 char *t;
2634
2635                 if (e[7]) {
2636                         if (!(t = strdup(e+7))) {
2637                                 log_error("Failed to allocate string.");
2638                                 return;
2639                         }
2640
2641                         log_debug("%s: got %s", u->meta.id, e);
2642
2643                         free(s->status_text);
2644                         s->status_text = t;
2645                 } else {
2646                         free(s->status_text);
2647                         s->status_text = NULL;
2648                 }
2649
2650         }
2651
2652         /* Notify clients about changed status or main pid */
2653         unit_add_to_dbus_queue(u);
2654 }
2655
2656 static int service_enumerate(Manager *m) {
2657         char **p;
2658         unsigned i;
2659         DIR *d = NULL;
2660         char *path = NULL, *fpath = NULL, *name = NULL;
2661         int r;
2662
2663         assert(m);
2664
2665         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2666                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2667                         struct dirent *de;
2668
2669                         free(path);
2670                         path = NULL;
2671                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2672                                 r = -ENOMEM;
2673                                 goto finish;
2674                         }
2675
2676                         if (d)
2677                                 closedir(d);
2678
2679                         if (!(d = opendir(path))) {
2680                                 if (errno != ENOENT)
2681                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2682
2683                                 continue;
2684                         }
2685
2686                         while ((de = readdir(d))) {
2687                                 Unit *service;
2688                                 int a, b;
2689
2690                                 if (ignore_file(de->d_name))
2691                                         continue;
2692
2693                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2694                                         continue;
2695
2696                                 if (strlen(de->d_name) < 4)
2697                                         continue;
2698
2699                                 a = undecchar(de->d_name[1]);
2700                                 b = undecchar(de->d_name[2]);
2701
2702                                 if (a < 0 || b < 0)
2703                                         continue;
2704
2705                                 free(fpath);
2706                                 fpath = NULL;
2707                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2708                                         r = -ENOMEM;
2709                                         goto finish;
2710                                 }
2711
2712                                 if (access(fpath, X_OK) < 0) {
2713
2714                                         if (errno != ENOENT)
2715                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2716
2717                                         continue;
2718                                 }
2719
2720                                 free(name);
2721                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2722                                         r = -ENOMEM;
2723                                         goto finish;
2724                                 }
2725
2726                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
2727                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2728                                         continue;
2729                                 }
2730
2731                                 if (de->d_name[0] == 'S' &&
2732                                     (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2733                                         SERVICE(service)->sysv_start_priority =
2734                                                 MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2735                                         SERVICE(service)->sysv_enabled = true;
2736                                 }
2737
2738                                 manager_dispatch_load_queue(m);
2739                                 service = unit_follow_merge(service);
2740
2741                                 /* If this is a native service, rely
2742                                  * on native ways to pull in a
2743                                  * service, don't pull it in via sysv
2744                                  * rcN.d links. */
2745                                 if (service->meta.fragment_path)
2746                                         continue;
2747
2748                                 if (de->d_name[0] == 'S') {
2749
2750                                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
2751                                                 goto finish;
2752
2753                                 } else if (de->d_name[0] == 'K' &&
2754                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2755                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2756
2757                                         /* We honour K links only for
2758                                          * halt/reboot. For the normal
2759                                          * runlevels we assume the
2760                                          * stop jobs will be
2761                                          * implicitly added by the
2762                                          * core logic. Also, we don't
2763                                          * really distuingish here
2764                                          * between the runlevels 0 and
2765                                          * 6 and just add them to the
2766                                          * special shutdown target. On
2767                                          * SUSE the boot.d/ runlevel
2768                                          * is also used for shutdown,
2769                                          * so we add links for that
2770                                          * too to the shutdown
2771                                          * target.*/
2772
2773                                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
2774                                                 goto finish;
2775                                 }
2776                         }
2777                 }
2778
2779         r = 0;
2780
2781 finish:
2782         free(path);
2783         free(fpath);
2784         free(name);
2785
2786         if (d)
2787                 closedir(d);
2788
2789         return r;
2790 }
2791
2792 static void service_bus_name_owner_change(
2793                 Unit *u,
2794                 const char *name,
2795                 const char *old_owner,
2796                 const char *new_owner) {
2797
2798         Service *s = SERVICE(u);
2799
2800         assert(s);
2801         assert(name);
2802
2803         assert(streq(s->bus_name, name));
2804         assert(old_owner || new_owner);
2805
2806         if (old_owner && new_owner)
2807                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2808         else if (old_owner)
2809                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2810         else
2811                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2812
2813         s->bus_name_good = !!new_owner;
2814
2815         if (s->type == SERVICE_DBUS) {
2816
2817                 /* service_enter_running() will figure out what to
2818                  * do */
2819                 if (s->state == SERVICE_RUNNING)
2820                         service_enter_running(s, true);
2821                 else if (s->state == SERVICE_START && new_owner)
2822                         service_enter_start_post(s);
2823
2824         } else if (new_owner &&
2825                    s->main_pid <= 0 &&
2826                    (s->state == SERVICE_START ||
2827                     s->state == SERVICE_START_POST ||
2828                     s->state == SERVICE_RUNNING ||
2829                     s->state == SERVICE_RELOAD)) {
2830
2831                 /* Try to acquire PID from bus service */
2832                 log_debug("Trying to acquire PID from D-Bus name...");
2833
2834                 bus_query_pid(u->meta.manager, name);
2835         }
2836 }
2837
2838 static void service_bus_query_pid_done(
2839                 Unit *u,
2840                 const char *name,
2841                 pid_t pid) {
2842
2843         Service *s = SERVICE(u);
2844
2845         assert(s);
2846         assert(name);
2847
2848         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2849
2850         if (s->main_pid <= 0 &&
2851             (s->state == SERVICE_START ||
2852              s->state == SERVICE_START_POST ||
2853              s->state == SERVICE_RUNNING ||
2854              s->state == SERVICE_RELOAD))
2855                 service_set_main_pid(s, pid);
2856 }
2857
2858 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
2859         assert(s);
2860         assert(fd >= 0);
2861
2862         /* This is called by the socket code when instantiating a new
2863          * service for a stream socket and the socket needs to be
2864          * configured. */
2865
2866         if (s->meta.load_state != UNIT_LOADED)
2867                 return -EINVAL;
2868
2869         if (s->socket_fd >= 0)
2870                 return -EBUSY;
2871
2872         if (s->state != SERVICE_DEAD)
2873                 return -EAGAIN;
2874
2875         s->socket_fd = fd;
2876         s->got_socket_fd = true;
2877         s->socket = sock;
2878
2879         return 0;
2880 }
2881
2882 static void service_reset_failed(Unit *u) {
2883         Service *s = SERVICE(u);
2884
2885         assert(s);
2886
2887         if (s->state == SERVICE_FAILED)
2888                 service_set_state(s, SERVICE_DEAD);
2889
2890         s->failure = false;
2891 }
2892
2893 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2894         [SERVICE_DEAD] = "dead",
2895         [SERVICE_START_PRE] = "start-pre",
2896         [SERVICE_START] = "start",
2897         [SERVICE_START_POST] = "start-post",
2898         [SERVICE_RUNNING] = "running",
2899         [SERVICE_EXITED] = "exited",
2900         [SERVICE_RELOAD] = "reload",
2901         [SERVICE_STOP] = "stop",
2902         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2903         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2904         [SERVICE_STOP_POST] = "stop-post",
2905         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2906         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2907         [SERVICE_FAILED] = "failed",
2908         [SERVICE_AUTO_RESTART] = "auto-restart",
2909 };
2910
2911 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2912
2913 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2914         [SERVICE_ONCE] = "once",
2915         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2916         [SERVICE_RESTART_ALWAYS] = "restart-always",
2917 };
2918
2919 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2920
2921 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2922         [SERVICE_SIMPLE] = "simple",
2923         [SERVICE_FORKING] = "forking",
2924         [SERVICE_ONESHOT] = "oneshot",
2925         [SERVICE_DBUS] = "dbus",
2926         [SERVICE_NOTIFY] = "notify"
2927 };
2928
2929 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2930
2931 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2932         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2933         [SERVICE_EXEC_START] = "ExecStart",
2934         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2935         [SERVICE_EXEC_RELOAD] = "ExecReload",
2936         [SERVICE_EXEC_STOP] = "ExecStop",
2937         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2938 };
2939
2940 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2941
2942 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
2943         [NOTIFY_NONE] = "none",
2944         [NOTIFY_MAIN] = "main",
2945         [NOTIFY_ALL] = "all"
2946 };
2947
2948 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
2949
2950 const UnitVTable service_vtable = {
2951         .suffix = ".service",
2952         .show_status = true,
2953
2954         .init = service_init,
2955         .done = service_done,
2956         .load = service_load,
2957
2958         .coldplug = service_coldplug,
2959
2960         .dump = service_dump,
2961
2962         .start = service_start,
2963         .stop = service_stop,
2964         .reload = service_reload,
2965
2966         .can_reload = service_can_reload,
2967
2968         .serialize = service_serialize,
2969         .deserialize_item = service_deserialize_item,
2970
2971         .active_state = service_active_state,
2972         .sub_state_to_string = service_sub_state_to_string,
2973
2974         .check_gc = service_check_gc,
2975         .check_snapshot = service_check_snapshot,
2976
2977         .sigchld_event = service_sigchld_event,
2978         .timer_event = service_timer_event,
2979
2980         .reset_failed = service_reset_failed,
2981
2982         .cgroup_notify_empty = service_cgroup_notify_event,
2983         .notify_message = service_notify_message,
2984
2985         .bus_name_owner_change = service_bus_name_owner_change,
2986         .bus_query_pid_done = service_bus_query_pid_done,
2987
2988         .bus_interface = "org.freedesktop.systemd1.Service",
2989         .bus_message_handler = bus_service_message_handler,
2990         .bus_invalidating_properties =  bus_service_invalidating_properties,
2991
2992         .enumerate = service_enumerate
2993 };