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                 "httpd",      SPECIAL_HTTP_DAEMON_TARGET,
 265 #endif
 266         };
 267
 268         unsigned i;
 269         char *r;
 270
 271         for (i = 0; i < ELEMENTSOF(table); i += 2)
 272                 if (streq(table[i], name)) {
 273                         if (!(r = strdup(table[i+1])))
 274                                 return -ENOMEM;
 275
 276                         goto finish;
 277                 }
 278
 279         if (*name == '$')
 280                 r = unit_name_build(name+1, NULL, ".target");
 281         else
 282                 r = sysv_translate_name(name);
 283
 284         if (!r)
 285                 return -ENOMEM;
 286
 287 finish:
 288
 289         if (_r)
 290                 *_r = r;
 291
 292         return 1;
 293 }
 294
 295 static int sysv_fix_order(Service *s) {
 296         Meta *other;
 297         int r;
 298
 299         assert(s);
 300
 301         if (s->sysv_start_priority < 0)
 302                 return 0;
 303
 304         /* For each pair of services where at least one lacks a LSB
 305          * header, we use the start priority value to order things. */
 306
 307         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 308                 Service *t;
 309                 UnitDependency d;
 310                 bool special_s, special_t;
 311
 312                 t = (Service*) other;
 313
 314                 if (s == t)
 315                         continue;
 316
 317                 if (t->sysv_start_priority < 0)
 318                         continue;
 319
 320                 /* If both units have modern headers we don't care
 321                  * about the priorities */
 322                 if ((s->meta.fragment_path || s->sysv_has_lsb) &&
 323                     (t->meta.fragment_path || t->sysv_has_lsb))
 324                         continue;
 325
 326                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 327                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 328
 329                 if (special_t && !special_s)
 330                         d = UNIT_AFTER;
 331                 else if (special_s && !special_t)
 332                         d = UNIT_BEFORE;
 333                 else if (t->sysv_start_priority < s->sysv_start_priority)
 334                         d = UNIT_AFTER;
 335                 else if (t->sysv_start_priority > s->sysv_start_priority)
 336                         d = UNIT_BEFORE;
 337                 else
 338                         continue;
 339
 340                 /* FIXME: Maybe we should compare the name here lexicographically? */
 341
 342                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 343                         return r;
 344         }
 345
 346         return 0;
 347 }
 348
 349 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 350         ExecCommand *c;
 351
 352         if (!(c = new0(ExecCommand, 1)))
 353                 return NULL;
 354
 355         if (!(c->path = strdup(path))) {
 356                 free(c);
 357                 return NULL;
 358         }
 359
 360         if (!(c->argv = strv_new(path, arg1, NULL))) {
 361                 free(c->path);
 362                 free(c);
 363                 return NULL;
 364         }
 365
 366         return c;
 367 }
 368
 369 static int sysv_exec_commands(Service *s) {
 370         ExecCommand *c;
 371
 372         assert(s);
 373         assert(s->sysv_path);
 374
 375         if (!(c = exec_command_new(s->sysv_path, "start")))
 376                 return -ENOMEM;
 377         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 378
 379         if (!(c = exec_command_new(s->sysv_path, "stop")))
 380                 return -ENOMEM;
 381         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 382
 383         if (!(c = exec_command_new(s->sysv_path, "reload")))
 384                 return -ENOMEM;
 385         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 386
 387         return 0;
 388 }
 389
 390 static int service_load_sysv_path(Service *s, const char *path) {
 391         FILE *f;
 392         Unit *u;
 393         unsigned line = 0;
 394         int r;
 395         enum {
 396                 NORMAL,
 397                 DESCRIPTION,
 398                 LSB,
 399                 LSB_DESCRIPTION
 400         } state = NORMAL;
 401
 402         assert(s);
 403         assert(path);
 404
 405         u = UNIT(s);
 406
 407         if (!(f = fopen(path, "re"))) {
 408                 r = errno == ENOENT ? 0 : -errno;
 409                 goto finish;
 410         }
 411
 412         free(s->sysv_path);
 413         if (!(s->sysv_path = strdup(path))) {
 414                 r = -ENOMEM;
 415                 goto finish;
 416         }
 417
 418         while (!feof(f)) {
 419                 char l[LINE_MAX], *t;
 420
 421                 if (!fgets(l, sizeof(l), f)) {
 422                         if (feof(f))
 423                                 break;
 424
 425                         r = -errno;
 426                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 427                         goto finish;
 428                 }
 429
 430                 line++;
 431
 432                 t = strstrip(l);
 433                 if (*t != '#')
 434                         continue;
 435
 436                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 437                         state = LSB;
 438                         s->sysv_has_lsb = true;
 439                         continue;
 440                 }
 441
 442                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 443                         state = NORMAL;
 444                         continue;
 445                 }
 446
 447                 t++;
 448                 t += strspn(t, WHITESPACE);
 449
 450                 if (state == NORMAL) {
 451
 452                         /* Try to parse Red Hat style chkconfig headers */
 453
 454                         if (startswith_no_case(t, "chkconfig:")) {
 455                                 int start_priority;
 456                                 char runlevels[16], *k;
 457
 458                                 state = NORMAL;
 459
 460                                 if (sscanf(t+10, "%15s %i %*i",
 461                                            runlevels,
 462                                            &start_priority) != 2) {
 463
 464                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 465                                         continue;
 466                                 }
 467
 468                                 /* A start priority gathered from the
 469                                  * symlink farms is preferred over the
 470                                  * data from the LSB header. */
 471                                 if (start_priority < 0 || start_priority > 99)
 472                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 473                                 else if (s->sysv_start_priority < 0)
 474                                         s->sysv_start_priority = start_priority;
 475
 476                                 char_array_0(runlevels);
 477                                 k = delete_chars(runlevels, WHITESPACE "-");
 478
 479                                 if (k[0]) {
 480                                         char *d;
 481
 482                                         if (!(d = strdup(k))) {
 483                                                 r = -ENOMEM;
 484                                                 goto finish;
 485                                         }
 486
 487                                         free(s->sysv_runlevels);
 488                                         s->sysv_runlevels = d;
 489                                 }
 490
 491                         } else if (startswith_no_case(t, "description:") &&
 492                                    !u->meta.description) {
 493
 494                                 size_t k = strlen(t);
 495                                 char *d;
 496
 497                                 if (t[k-1] == '\\') {
 498                                         state = DESCRIPTION;
 499                                         t[k-1] = 0;
 500                                 }
 501
 502                                 if (!(d = strappend("LSB: ", strstrip(t+12)))) {
 503                                         r = -ENOMEM;
 504                                         goto finish;
 505                                 }
 506
 507                                 free(u->meta.description);
 508                                 u->meta.description = d;
 509
 510                         } else if (startswith_no_case(t, "pidfile:")) {
 511
 512                                 char *fn;
 513
 514                                 state = NORMAL;
 515
 516                                 fn = strstrip(t+8);
 517                                 if (!path_is_absolute(fn)) {
 518                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 519                                         continue;
 520                                 }
 521
 522                                 if (!(fn = strdup(fn))) {
 523                                         r = -ENOMEM;
 524                                         goto finish;
 525                                 }
 526
 527                                 free(s->pid_file);
 528                                 s->pid_file = fn;
 529                         }
 530
 531                 } else if (state == DESCRIPTION) {
 532
 533                         /* Try to parse Red Hat style description
 534                          * continuation */
 535
 536                         size_t k = strlen(t);
 537                         char *d;
 538
 539                         if (t[k-1] == '\\')
 540                                 t[k-1] = 0;
 541                         else
 542                                 state = NORMAL;
 543
 544                         assert(u->meta.description);
 545                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 546                                 r = -ENOMEM;
 547                                 goto finish;
 548                         }
 549
 550                         free(u->meta.description);
 551                         u->meta.description = d;
 552
 553                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 554
 555                         if (startswith_no_case(t, "Provides:")) {
 556                                 char *i, *w;
 557                                 size_t z;
 558
 559                                 state = LSB;
 560
 561                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 562                                         char *n, *m;
 563
 564                                         if (!(n = strndup(w, z))) {
 565                                                 r = -ENOMEM;
 566                                                 goto finish;
 567                                         }
 568
 569                                         r = sysv_translate_facility(n, &m);
 570                                         free(n);
 571
 572                                         if (r < 0)
 573                                                 goto finish;
 574
 575                                         if (r == 0)
 576                                                 continue;
 577
 578                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 579                                                 r = unit_add_name(u, m);
 580                                         else {
 581                                                 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 582
 583                                                 if (s->sysv_enabled) {
 584                                                         int k;
 585
 586                                                         if ((k = unit_add_dependency_by_name_inverse(u, UNIT_WANTS, m, NULL, true)) < 0)
 587                                                                 r = k;
 588                                                 }
 589                                         }
 590
 591                                         if (r < 0)
 592                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 593
 594                                         free(m);
 595                                 }
 596
 597                         } else if (startswith_no_case(t, "Required-Start:") ||
 598                                    startswith_no_case(t, "Should-Start:") ||
 599                                    startswith_no_case(t, "X-Start-Before:") ||
 600                                    startswith_no_case(t, "X-Start-After:")) {
 601                                 char *i, *w;
 602                                 size_t z;
 603
 604                                 state = LSB;
 605
 606                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 607                                         char *n, *m;
 608
 609                                         if (!(n = strndup(w, z))) {
 610                                                 r = -ENOMEM;
 611                                                 goto finish;
 612                                         }
 613
 614                                         r = sysv_translate_facility(n, &m);
 615                                         free(n);
 616
 617                                         if (r < 0)
 618                                                 goto finish;
 619
 620                                         if (r == 0)
 621                                                 continue;
 622
 623                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 624
 625                                         if (r < 0)
 626                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 627
 628                                         free(m);
 629                                 }
 630                         } else if (startswith_no_case(t, "Default-Start:")) {
 631                                 char *k, *d;
 632
 633                                 state = LSB;
 634
 635                                 k = delete_chars(t+14, WHITESPACE "-");
 636
 637                                 if (k[0] != 0) {
 638                                         if (!(d = strdup(k))) {
 639                                                 r = -ENOMEM;
 640                                                 goto finish;
 641                                         }
 642
 643                                         free(s->sysv_runlevels);
 644                                         s->sysv_runlevels = d;
 645                                 }
 646
 647                         } else if (startswith_no_case(t, "Description:") &&
 648                                    !u->meta.description) {
 649                                 char *d;
 650
 651                                 /* We use the long description only if
 652                                  * no short description is set. */
 653
 654                                 state = LSB_DESCRIPTION;
 655
 656                                 if (!(d = strappend("LSB: ", strstrip(t+12)))) {
 657                                         r = -ENOMEM;
 658                                         goto finish;
 659                                 }
 660
 661                                 free(u->meta.description);
 662                                 u->meta.description = d;
 663
 664                         } else if (startswith_no_case(t, "Short-Description:")) {
 665                                 char *d;
 666
 667                                 state = LSB;
 668
 669                                 if (!(d = strappend("LSB: ", strstrip(t+18)))) {
 670                                         r = -ENOMEM;
 671                                         goto finish;
 672                                 }
 673
 674                                 free(u->meta.description);
 675                                 u->meta.description = d;
 676
 677                         } else if (startswith_no_case(t, "X-Interactive:")) {
 678                                 int b;
 679
 680                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 681                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 682                                         continue;
 683                                 }
 684
 685                                 if (b)
 686                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 687                                 else
 688                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 689
 690                         } else if (state == LSB_DESCRIPTION) {
 691
 692                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 693                                         char *d;
 694
 695                                         assert(u->meta.description);
 696                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 697                                                 r = -ENOMEM;
 698                                                 goto finish;
 699                                         }
 700
 701                                         free(u->meta.description);
 702                                         u->meta.description = d;
 703                                 } else
 704                                         state = LSB;
 705                         }
 706                 }
 707         }
 708
 709         if ((r = sysv_exec_commands(s)) < 0)
 710                 goto finish;
 711
 712         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 713                 /* If there a runlevels configured for this service
 714                  * but none of the standard ones, then we assume this
 715                  * is some special kind of service (which might be
 716                  * needed for early boot) and don't create any links
 717                  * to it. */
 718
 719                 s->meta.default_dependencies = false;
 720
 721                 /* Don't timeout special services during boot (like fsck) */
 722                 s->timeout_usec = 0;
 723         }
 724
 725         /* Special setting for all SysV services */
 726         s->type = SERVICE_FORKING;
 727         s->remain_after_exit = true;
 728         s->restart = SERVICE_ONCE;
 729         s->exec_context.std_output =
 730                 (s->meta.manager->sysv_console || s->exec_context.std_input == EXEC_INPUT_TTY)
 731                 ? EXEC_OUTPUT_TTY : EXEC_OUTPUT_NULL;
 732         s->exec_context.kill_mode = KILL_PROCESS_GROUP;
 733
 734         u->meta.load_state = UNIT_LOADED;
 735         r = 0;
 736
 737 finish:
 738
 739         if (f)
 740                 fclose(f);
 741
 742         return r;
 743 }
 744
 745 static int service_load_sysv_name(Service *s, const char *name) {
 746         char **p;
 747
 748         assert(s);
 749         assert(name);
 750
 751         /* For SysV services we strip the boot. or .sh
 752          * prefixes/suffixes. */
 753         if (startswith(name, "boot.") ||
 754             endswith(name, ".sh.service"))
 755                 return -ENOENT;
 756
 757         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 758                 char *path;
 759                 int r;
 760
 761                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 762                         return -ENOMEM;
 763
 764                 assert(endswith(path, ".service"));
 765                 path[strlen(path)-8] = 0;
 766
 767                 r = service_load_sysv_path(s, path);
 768
 769                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 770                         /* Try Debian style xxx.sh source'able init scripts */
 771                         strcat(path, ".sh");
 772                         r = service_load_sysv_path(s, path);
 773                 }
 774
 775                 free(path);
 776
 777                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 778                         /* Try SUSE style boot.xxx init scripts */
 779
 780                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 781                                 return -ENOMEM;
 782
 783                         path[strlen(path)-8] = 0;
 784                         r = service_load_sysv_path(s, path);
 785                         free(path);
 786                 }
 787
 788                 if (r < 0)
 789                         return r;
 790
 791                 if ((s->meta.load_state != UNIT_STUB))
 792                         break;
 793         }
 794
 795         return 0;
 796 }
 797
 798 static int service_load_sysv(Service *s) {
 799         const char *t;
 800         Iterator i;
 801         int r;
 802
 803         assert(s);
 804
 805         /* Load service data from SysV init scripts, preferably with
 806          * LSB headers ... */
 807
 808         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 809                 return 0;
 810
 811         if ((t = s->meta.id))
 812                 if ((r = service_load_sysv_name(s, t)) < 0)
 813                         return r;
 814
 815         if (s->meta.load_state == UNIT_STUB)
 816                 SET_FOREACH(t, s->meta.names, i) {
 817                         if (t == s->meta.id)
 818                                 continue;
 819
 820                         if ((r = service_load_sysv_name(s, t)) < 0)
 821                                 return r;
 822
 823                         if (s->meta.load_state != UNIT_STUB)
 824                                 break;
 825                 }
 826
 827         return 0;
 828 }
 829
 830 static int service_verify(Service *s) {
 831         assert(s);
 832
 833         if (s->meta.load_state != UNIT_LOADED)
 834                 return 0;
 835
 836         if (!s->exec_command[SERVICE_EXEC_START]) {
 837                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
 838                 return -EINVAL;
 839         }
 840
 841         if (s->type != SERVICE_ONESHOT &&
 842             s->exec_command[SERVICE_EXEC_START]->command_next) {
 843                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", s->meta.id);
 844                 return -EINVAL;
 845         }
 846
 847         if (s->type == SERVICE_DBUS && !s->bus_name) {
 848                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
 849                 return -EINVAL;
 850         }
 851
 852         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
 853                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 854                 return -EINVAL;
 855         }
 856
 857         return 0;
 858 }
 859
 860 static int service_add_default_dependencies(Service *s) {
 861         int r;
 862
 863         assert(s);
 864
 865         /* Add a number of automatic dependencies useful for the
 866          * majority of services. */
 867
 868         /* First, pull in base system */
 869         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
 870
 871                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 872                         return r;
 873
 874         } else if (s->meta.manager->running_as == MANAGER_SESSION) {
 875
 876                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
 877                         return r;
 878         }
 879
 880         /* Second, activate normal shutdown */
 881         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTED_BY, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 882 }
 883
 884 static int service_load(Unit *u) {
 885         int r;
 886         Service *s = SERVICE(u);
 887
 888         assert(s);
 889
 890         /* Load a .service file */
 891         if ((r = unit_load_fragment(u)) < 0)
 892                 return r;
 893
 894         /* Load a classic init script as a fallback, if we couldn't find anything */
 895         if (u->meta.load_state == UNIT_STUB)
 896                 if ((r = service_load_sysv(s)) < 0)
 897                         return r;
 898
 899         /* Still nothing found? Then let's give up */
 900         if (u->meta.load_state == UNIT_STUB)
 901                 return -ENOENT;
 902
 903         /* We were able to load something, then let's add in the
 904          * dropin directories. */
 905         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 906                 return r;
 907
 908         /* This is a new unit? Then let's add in some extras */
 909         if (u->meta.load_state == UNIT_LOADED) {
 910                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 911                         return r;
 912
 913                 if ((r = unit_add_default_cgroup(u)) < 0)
 914                         return r;
 915
 916                 if ((r = sysv_fix_order(s)) < 0)
 917                         return r;
 918
 919                 if (s->bus_name)
 920                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 921                                 return r;
 922
 923                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
 924                         s->notify_access = NOTIFY_MAIN;
 925
 926                 if (s->type == SERVICE_DBUS || s->bus_name)
 927                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
 928                                 return r;
 929
 930                 if (s->meta.default_dependencies)
 931                         if ((r = service_add_default_dependencies(s)) < 0)
 932                                 return r;
 933         }
 934
 935         return service_verify(s);
 936 }
 937
 938 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 939
 940         ServiceExecCommand c;
 941         Service *s = SERVICE(u);
 942         const char *prefix2;
 943         char *p2;
 944
 945         assert(s);
 946
 947         p2 = strappend(prefix, "\t");
 948         prefix2 = p2 ? p2 : prefix;
 949
 950         fprintf(f,
 951                 "%sService State: %s\n"
 952                 "%sPermissionsStartOnly: %s\n"
 953                 "%sRootDirectoryStartOnly: %s\n"
 954                 "%sRemainAfterExit: %s\n"
 955                 "%sType: %s\n"
 956                 "%sRestart: %s\n"
 957                 "%sNotifyAccess: %s\n",
 958                 prefix, service_state_to_string(s->state),
 959                 prefix, yes_no(s->permissions_start_only),
 960                 prefix, yes_no(s->root_directory_start_only),
 961                 prefix, yes_no(s->remain_after_exit),
 962                 prefix, service_type_to_string(s->type),
 963                 prefix, service_restart_to_string(s->restart),
 964                 prefix, notify_access_to_string(s->notify_access));
 965
 966         if (s->control_pid > 0)
 967                 fprintf(f,
 968                         "%sControl PID: %lu\n",
 969                         prefix, (unsigned long) s->control_pid);
 970
 971         if (s->main_pid > 0)
 972                 fprintf(f,
 973                         "%sMain PID: %lu\n",
 974                         prefix, (unsigned long) s->main_pid);
 975
 976         if (s->pid_file)
 977                 fprintf(f,
 978                         "%sPIDFile: %s\n",
 979                         prefix, s->pid_file);
 980
 981         if (s->bus_name)
 982                 fprintf(f,
 983                         "%sBusName: %s\n"
 984                         "%sBus Name Good: %s\n",
 985                         prefix, s->bus_name,
 986                         prefix, yes_no(s->bus_name_good));
 987
 988         exec_context_dump(&s->exec_context, f, prefix);
 989
 990         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 991
 992                 if (!s->exec_command[c])
 993                         continue;
 994
 995                 fprintf(f, "%s-> %s:\n",
 996                         prefix, service_exec_command_to_string(c));
 997
 998                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 999         }
1000
1001         if (s->sysv_path)
1002                 fprintf(f,
1003                         "%sSysV Init Script Path: %s\n"
1004                         "%sSysV Init Script has LSB Header: %s\n",
1005                         prefix, s->sysv_path,
1006                         prefix, yes_no(s->sysv_has_lsb));
1007
1008         if (s->sysv_start_priority >= 0)
1009                 fprintf(f,
1010                         "%sSysVStartPriority: %i\n"
1011                         "%sSysVEnabled: %s\n",
1012                         prefix, s->sysv_start_priority,
1013                         prefix, yes_no(s->sysv_enabled));
1014
1015         if (s->sysv_runlevels)
1016                 fprintf(f, "%sSysVRunLevels: %s\n",
1017                         prefix, s->sysv_runlevels);
1018
1019         if (s->status_text)
1020                 fprintf(f, "%sStatus Text: %s\n",
1021                         prefix, s->status_text);
1022
1023         free(p2);
1024 }
1025
1026 static int service_load_pid_file(Service *s) {
1027         char *k;
1028         int r;
1029         pid_t pid;
1030
1031         assert(s);
1032
1033         if (s->main_pid_known)
1034                 return 0;
1035
1036         assert(s->main_pid <= 0);
1037
1038         if (!s->pid_file)
1039                 return -ENOENT;
1040
1041         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1042                 return r;
1043
1044         r = parse_pid(k, &pid);
1045         free(k);
1046
1047         if (r < 0)
1048                 return r;
1049
1050         if (kill(pid, 0) < 0 && errno != EPERM) {
1051                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1052                             (unsigned long) pid, s->pid_file);
1053                 return -ESRCH;
1054         }
1055
1056         if ((r = service_set_main_pid(s, pid)) < 0)
1057                 return r;
1058
1059         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1060                 /* FIXME: we need to do something here */
1061                 return r;
1062
1063         return 0;
1064 }
1065
1066 static int service_get_sockets(Service *s, Set **_set) {
1067         Set *set;
1068         Iterator i;
1069         char *t;
1070         int r;
1071
1072         assert(s);
1073         assert(_set);
1074
1075         if (s->socket_fd >= 0)
1076                 return 0;
1077
1078         /* Collects all Socket objects that belong to this
1079          * service. Note that a service might have multiple sockets
1080          * via multiple names. */
1081
1082         if (!(set = set_new(NULL, NULL)))
1083                 return -ENOMEM;
1084
1085         SET_FOREACH(t, s->meta.names, i) {
1086                 char *k;
1087                 Unit *p;
1088
1089                 /* Look for all socket objects that go by any of our
1090                  * units and collect their fds */
1091
1092                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1093                         r = -ENOMEM;
1094                         goto fail;
1095                 }
1096
1097                 p = manager_get_unit(s->meta.manager, k);
1098                 free(k);
1099
1100                 if (!p)
1101                         continue;
1102
1103                 if ((r = set_put(set, p)) < 0)
1104                         goto fail;
1105         }
1106
1107         *_set = set;
1108         return 0;
1109
1110 fail:
1111         set_free(set);
1112         return r;
1113 }
1114
1115 static int service_notify_sockets_dead(Service *s) {
1116         Iterator i;
1117         Set *set;
1118         Socket *sock;
1119         int r;
1120
1121         assert(s);
1122
1123         if (s->socket_fd >= 0)
1124                 return 0;
1125
1126         /* Notifies all our sockets when we die */
1127         if ((r = service_get_sockets(s, &set)) < 0)
1128                 return r;
1129
1130         SET_FOREACH(sock, set, i)
1131                 socket_notify_service_dead(sock);
1132
1133         set_free(set);
1134
1135         return 0;
1136 }
1137
1138 static void service_set_state(Service *s, ServiceState state) {
1139         ServiceState old_state;
1140         assert(s);
1141
1142         old_state = s->state;
1143         s->state = state;
1144
1145         if (state != SERVICE_START_PRE &&
1146             state != SERVICE_START &&
1147             state != SERVICE_START_POST &&
1148             state != SERVICE_RELOAD &&
1149             state != SERVICE_STOP &&
1150             state != SERVICE_STOP_SIGTERM &&
1151             state != SERVICE_STOP_SIGKILL &&
1152             state != SERVICE_STOP_POST &&
1153             state != SERVICE_FINAL_SIGTERM &&
1154             state != SERVICE_FINAL_SIGKILL &&
1155             state != SERVICE_AUTO_RESTART)
1156                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1157
1158         if (state != SERVICE_START &&
1159             state != SERVICE_START_POST &&
1160             state != SERVICE_RUNNING &&
1161             state != SERVICE_RELOAD &&
1162             state != SERVICE_STOP &&
1163             state != SERVICE_STOP_SIGTERM &&
1164             state != SERVICE_STOP_SIGKILL)
1165                 service_unwatch_main_pid(s);
1166
1167         if (state != SERVICE_START_PRE &&
1168             state != SERVICE_START &&
1169             state != SERVICE_START_POST &&
1170             state != SERVICE_RELOAD &&
1171             state != SERVICE_STOP &&
1172             state != SERVICE_STOP_SIGTERM &&
1173             state != SERVICE_STOP_SIGKILL &&
1174             state != SERVICE_STOP_POST &&
1175             state != SERVICE_FINAL_SIGTERM &&
1176             state != SERVICE_FINAL_SIGKILL) {
1177                 service_unwatch_control_pid(s);
1178                 s->control_command = NULL;
1179                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1180         }
1181
1182         if (state == SERVICE_DEAD ||
1183             state == SERVICE_STOP ||
1184             state == SERVICE_STOP_SIGTERM ||
1185             state == SERVICE_STOP_SIGKILL ||
1186             state == SERVICE_STOP_POST ||
1187             state == SERVICE_FINAL_SIGTERM ||
1188             state == SERVICE_FINAL_SIGKILL ||
1189             state == SERVICE_FAILED ||
1190             state == SERVICE_AUTO_RESTART)
1191                 service_notify_sockets_dead(s);
1192
1193         if (state != SERVICE_START_PRE &&
1194             state != SERVICE_START &&
1195             state != SERVICE_START_POST &&
1196             state != SERVICE_RUNNING &&
1197             state != SERVICE_RELOAD &&
1198             state != SERVICE_STOP &&
1199             state != SERVICE_STOP_SIGTERM &&
1200             state != SERVICE_STOP_SIGKILL &&
1201             state != SERVICE_STOP_POST &&
1202             state != SERVICE_FINAL_SIGTERM &&
1203             state != SERVICE_FINAL_SIGKILL &&
1204             !(state == SERVICE_DEAD && s->meta.job)) {
1205                 service_close_socket_fd(s);
1206                 service_connection_unref(s);
1207         }
1208
1209         /* For the inactive states unit_notify() will trim the cgroup,
1210          * but for exit we have to do that ourselves... */
1211         if (state == SERVICE_EXITED)
1212                 cgroup_bonding_trim_list(s->meta.cgroup_bondings, true);
1213
1214         if (old_state != state)
1215                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1216
1217         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1218 }
1219
1220 static int service_coldplug(Unit *u) {
1221         Service *s = SERVICE(u);
1222         int r;
1223
1224         assert(s);
1225         assert(s->state == SERVICE_DEAD);
1226
1227         if (s->deserialized_state != s->state) {
1228
1229                 if (s->deserialized_state == SERVICE_START_PRE ||
1230                     s->deserialized_state == SERVICE_START ||
1231                     s->deserialized_state == SERVICE_START_POST ||
1232                     s->deserialized_state == SERVICE_RELOAD ||
1233                     s->deserialized_state == SERVICE_STOP ||
1234                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1235                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1236                     s->deserialized_state == SERVICE_STOP_POST ||
1237                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1238                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1239                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1240
1241                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1242                                 usec_t k;
1243
1244                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1245
1246                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1247                                         return r;
1248                         }
1249                 }
1250
1251                 if ((s->deserialized_state == SERVICE_START &&
1252                      (s->type == SERVICE_FORKING ||
1253                       s->type == SERVICE_DBUS ||
1254                       s->type == SERVICE_ONESHOT ||
1255                       s->type == SERVICE_NOTIFY)) ||
1256                     s->deserialized_state == SERVICE_START_POST ||
1257                     s->deserialized_state == SERVICE_RUNNING ||
1258                     s->deserialized_state == SERVICE_RELOAD ||
1259                     s->deserialized_state == SERVICE_STOP ||
1260                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1261                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1262                         if (s->main_pid > 0)
1263                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1264                                         return r;
1265
1266                 if (s->deserialized_state == SERVICE_START_PRE ||
1267                     s->deserialized_state == SERVICE_START ||
1268                     s->deserialized_state == SERVICE_START_POST ||
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                     s->deserialized_state == SERVICE_STOP_POST ||
1274                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1275                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1276                         if (s->control_pid > 0)
1277                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1278                                         return r;
1279
1280                 service_set_state(s, s->deserialized_state);
1281         }
1282
1283         return 0;
1284 }
1285
1286 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1287         Iterator i;
1288         int r;
1289         int *rfds = NULL;
1290         unsigned rn_fds = 0;
1291         Set *set;
1292         Socket *sock;
1293
1294         assert(s);
1295         assert(fds);
1296         assert(n_fds);
1297
1298         if (s->socket_fd >= 0)
1299                 return 0;
1300
1301         if ((r = service_get_sockets(s, &set)) < 0)
1302                 return r;
1303
1304         SET_FOREACH(sock, set, i) {
1305                 int *cfds;
1306                 unsigned cn_fds;
1307
1308                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1309                         goto fail;
1310
1311                 if (!cfds)
1312                         continue;
1313
1314                 if (!rfds) {
1315                         rfds = cfds;
1316                         rn_fds = cn_fds;
1317                 } else {
1318                         int *t;
1319
1320                         if (!(t = new(int, rn_fds+cn_fds))) {
1321                                 free(cfds);
1322                                 r = -ENOMEM;
1323                                 goto fail;
1324                         }
1325
1326                         memcpy(t, rfds, rn_fds);
1327                         memcpy(t+rn_fds, cfds, cn_fds);
1328                         free(rfds);
1329                         free(cfds);
1330
1331                         rfds = t;
1332                         rn_fds = rn_fds+cn_fds;
1333                 }
1334         }
1335
1336         *fds = rfds;
1337         *n_fds = rn_fds;
1338
1339         set_free(set);
1340
1341         return 0;
1342
1343 fail:
1344         set_free(set);
1345         free(rfds);
1346
1347         return r;
1348 }
1349
1350 static int service_spawn(
1351                 Service *s,
1352                 ExecCommand *c,
1353                 bool timeout,
1354                 bool pass_fds,
1355                 bool apply_permissions,
1356                 bool apply_chroot,
1357                 bool apply_tty_stdin,
1358                 bool set_notify_socket,
1359                 pid_t *_pid) {
1360
1361         pid_t pid;
1362         int r;
1363         int *fds = NULL, *fdsbuf = NULL;
1364         unsigned n_fds = 0, n_env = 0;
1365         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1366
1367         assert(s);
1368         assert(c);
1369         assert(_pid);
1370
1371         if (pass_fds ||
1372             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1373             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1374             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1375
1376                 if (s->socket_fd >= 0) {
1377                         fds = &s->socket_fd;
1378                         n_fds = 1;
1379                 } else {
1380                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1381                                 goto fail;
1382
1383                         fds = fdsbuf;
1384                 }
1385         }
1386
1387         if (timeout && s->timeout_usec) {
1388                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1389                         goto fail;
1390         } else
1391                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1392
1393         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1394                 r = -ENOMEM;
1395                 goto fail;
1396         }
1397
1398         if (!(our_env = new0(char*, 3))) {
1399                 r = -ENOMEM;
1400                 goto fail;
1401         }
1402
1403         if (set_notify_socket)
1404                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1405                         r = -ENOMEM;
1406                         goto fail;
1407                 }
1408
1409         if (s->main_pid > 0)
1410                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1411                         r = -ENOMEM;
1412                         goto fail;
1413                 }
1414
1415         if (!(final_env = strv_env_merge(2,
1416                                          s->meta.manager->environment,
1417                                          our_env,
1418                                          NULL))) {
1419                 r = -ENOMEM;
1420                 goto fail;
1421         }
1422
1423         r = exec_spawn(c,
1424                        argv,
1425                        &s->exec_context,
1426                        fds, n_fds,
1427                        final_env,
1428                        apply_permissions,
1429                        apply_chroot,
1430                        apply_tty_stdin,
1431                        s->meta.manager->confirm_spawn,
1432                        s->meta.cgroup_bondings,
1433                        &pid);
1434
1435         if (r < 0)
1436                 goto fail;
1437
1438
1439         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1440                 /* FIXME: we need to do something here */
1441                 goto fail;
1442
1443         free(fdsbuf);
1444         strv_free(argv);
1445         strv_free(our_env);
1446         strv_free(final_env);
1447
1448         *_pid = pid;
1449
1450         return 0;
1451
1452 fail:
1453         free(fdsbuf);
1454         strv_free(argv);
1455         strv_free(our_env);
1456         strv_free(final_env);
1457
1458         if (timeout)
1459                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1460
1461         return r;
1462 }
1463
1464 static int main_pid_good(Service *s) {
1465         assert(s);
1466
1467         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1468          * don't know */
1469
1470         /* If we know the pid file, then lets just check if it is
1471          * still valid */
1472         if (s->main_pid_known)
1473                 return s->main_pid > 0;
1474
1475         /* We don't know the pid */
1476         return -EAGAIN;
1477 }
1478
1479 static int control_pid_good(Service *s) {
1480         assert(s);
1481
1482         return s->control_pid > 0;
1483 }
1484
1485 static int cgroup_good(Service *s) {
1486         int r;
1487
1488         assert(s);
1489
1490         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1491                 return r;
1492
1493         return !r;
1494 }
1495
1496 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1497         int r;
1498         assert(s);
1499
1500         if (!success)
1501                 s->failure = true;
1502
1503         if (allow_restart &&
1504             !s->forbid_restart &&
1505             (s->restart == SERVICE_RESTART_ALWAYS ||
1506              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1507
1508                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1509                         goto fail;
1510
1511                 service_set_state(s, SERVICE_AUTO_RESTART);
1512         } else
1513                 service_set_state(s, s->failure ? SERVICE_FAILED : SERVICE_DEAD);
1514
1515         s->forbid_restart = false;
1516
1517         return;
1518
1519 fail:
1520         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1521         service_enter_dead(s, false, false);
1522 }
1523
1524 static void service_enter_signal(Service *s, ServiceState state, bool success);
1525
1526 static void service_enter_stop_post(Service *s, bool success) {
1527         int r;
1528         assert(s);
1529
1530         if (!success)
1531                 s->failure = true;
1532
1533         service_unwatch_control_pid(s);
1534
1535         s->control_command_id = SERVICE_EXEC_STOP_POST;
1536         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1537                 if ((r = service_spawn(s,
1538                                        s->control_command,
1539                                        true,
1540                                        false,
1541                                        !s->permissions_start_only,
1542                                        !s->root_directory_start_only,
1543                                        true,
1544                                        false,
1545                                        &s->control_pid)) < 0)
1546                         goto fail;
1547
1548
1549                 service_set_state(s, SERVICE_STOP_POST);
1550         } else
1551                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1552
1553         return;
1554
1555 fail:
1556         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1557         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1558 }
1559
1560 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1561         int r;
1562         Set *pid_set = NULL;
1563         bool wait_for_exit = false;
1564
1565         assert(s);
1566
1567         if (!success)
1568                 s->failure = true;
1569
1570         if (s->exec_context.kill_mode != KILL_NONE) {
1571                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1572
1573                 if (s->main_pid > 0) {
1574                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1575                                  -s->main_pid :
1576                                  s->main_pid, sig) < 0 && errno != ESRCH)
1577
1578                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1579                         else
1580                                 wait_for_exit = true;
1581                 }
1582
1583                 if (s->control_pid > 0) {
1584                         if (kill(s->exec_context.kill_mode == KILL_PROCESS_GROUP ?
1585                                  -s->control_pid :
1586                                  s->control_pid, sig) < 0 && errno != ESRCH)
1587
1588                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1589                         else
1590                                 wait_for_exit = true;
1591                 }
1592
1593                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1594
1595                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1596                                 r = -ENOMEM;
1597                                 goto fail;
1598                         }
1599
1600                         /* Exclude the main/control pids from being killed via the cgroup */
1601                         if (s->main_pid > 0)
1602                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1603                                         goto fail;
1604
1605                         if (s->control_pid > 0)
1606                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1607                                         goto fail;
1608
1609                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig, pid_set)) < 0) {
1610                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1611                                         log_warning("Failed to kill control group: %s", strerror(-r));
1612                         } else if (r > 0)
1613                                 wait_for_exit = true;
1614
1615                         set_free(pid_set);
1616                 }
1617         }
1618
1619         if (wait_for_exit) {
1620                 if (s->timeout_usec > 0)
1621                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1622                                 goto fail;
1623
1624                 service_set_state(s, state);
1625         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1626                 service_enter_stop_post(s, true);
1627         else
1628                 service_enter_dead(s, true, true);
1629
1630         return;
1631
1632 fail:
1633         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1634
1635         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1636                 service_enter_stop_post(s, false);
1637         else
1638                 service_enter_dead(s, false, true);
1639
1640         if (pid_set)
1641                 set_free(pid_set);
1642 }
1643
1644 static void service_enter_stop(Service *s, bool success) {
1645         int r;
1646
1647         assert(s);
1648
1649         if (!success)
1650                 s->failure = true;
1651
1652         service_unwatch_control_pid(s);
1653
1654         s->control_command_id = SERVICE_EXEC_STOP;
1655         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1656                 if ((r = service_spawn(s,
1657                                        s->control_command,
1658                                        true,
1659                                        false,
1660                                        !s->permissions_start_only,
1661                                        !s->root_directory_start_only,
1662                                        false,
1663                                        false,
1664                                        &s->control_pid)) < 0)
1665                         goto fail;
1666
1667                 service_set_state(s, SERVICE_STOP);
1668         } else
1669                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1670
1671         return;
1672
1673 fail:
1674         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1675         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1676 }
1677
1678 static void service_enter_running(Service *s, bool success) {
1679         int main_pid_ok, cgroup_ok;
1680         assert(s);
1681
1682         if (!success)
1683                 s->failure = true;
1684
1685         main_pid_ok = main_pid_good(s);
1686         cgroup_ok = cgroup_good(s);
1687
1688         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1689             (s->bus_name_good || s->type != SERVICE_DBUS))
1690                 service_set_state(s, SERVICE_RUNNING);
1691         else if (s->remain_after_exit)
1692                 service_set_state(s, SERVICE_EXITED);
1693         else
1694                 service_enter_stop(s, true);
1695 }
1696
1697 static void service_enter_start_post(Service *s) {
1698         int r;
1699         assert(s);
1700
1701         service_unwatch_control_pid(s);
1702
1703         s->control_command_id = SERVICE_EXEC_START_POST;
1704         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1705                 if ((r = service_spawn(s,
1706                                        s->control_command,
1707                                        true,
1708                                        false,
1709                                        !s->permissions_start_only,
1710                                        !s->root_directory_start_only,
1711                                        false,
1712                                        false,
1713                                        &s->control_pid)) < 0)
1714                         goto fail;
1715
1716                 service_set_state(s, SERVICE_START_POST);
1717         } else
1718                 service_enter_running(s, true);
1719
1720         return;
1721
1722 fail:
1723         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1724         service_enter_stop(s, false);
1725 }
1726
1727 static void service_enter_start(Service *s) {
1728         pid_t pid;
1729         int r;
1730
1731         assert(s);
1732
1733         assert(s->exec_command[SERVICE_EXEC_START]);
1734         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
1735
1736         if (s->type == SERVICE_FORKING)
1737                 service_unwatch_control_pid(s);
1738         else
1739                 service_unwatch_main_pid(s);
1740
1741         s->control_command_id = SERVICE_EXEC_START;
1742         s->control_command = s->exec_command[SERVICE_EXEC_START];
1743
1744         if ((r = service_spawn(s,
1745                                s->control_command,
1746                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1747                                true,
1748                                true,
1749                                true,
1750                                true,
1751                                s->notify_access != NOTIFY_NONE,
1752                                &pid)) < 0)
1753                 goto fail;
1754
1755         if (s->type == SERVICE_SIMPLE) {
1756                 /* For simple services we immediately start
1757                  * the START_POST binaries. */
1758
1759                 service_set_main_pid(s, pid);
1760                 service_enter_start_post(s);
1761
1762         } else  if (s->type == SERVICE_FORKING) {
1763
1764                 /* For forking services we wait until the start
1765                  * process exited. */
1766
1767                 s->control_pid = pid;
1768                 service_set_state(s, SERVICE_START);
1769
1770         } else if (s->type == SERVICE_ONESHOT ||
1771                    s->type == SERVICE_DBUS ||
1772                    s->type == SERVICE_NOTIFY) {
1773
1774                 /* For oneshot services we wait until the start
1775                  * process exited, too, but it is our main process. */
1776
1777                 /* For D-Bus services we know the main pid right away,
1778                  * but wait for the bus name to appear on the
1779                  * bus. Notify services are similar. */
1780
1781                 service_set_main_pid(s, pid);
1782                 service_set_state(s, SERVICE_START);
1783         } else
1784                 assert_not_reached("Unknown service type");
1785
1786         return;
1787
1788 fail:
1789         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
1790         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1791 }
1792
1793 static void service_enter_start_pre(Service *s) {
1794         int r;
1795
1796         assert(s);
1797
1798         service_unwatch_control_pid(s);
1799
1800         s->control_command_id = SERVICE_EXEC_START_PRE;
1801         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1802                 if ((r = service_spawn(s,
1803                                        s->control_command,
1804                                        true,
1805                                        false,
1806                                        !s->permissions_start_only,
1807                                        !s->root_directory_start_only,
1808                                        true,
1809                                        false,
1810                                        &s->control_pid)) < 0)
1811                         goto fail;
1812
1813                 service_set_state(s, SERVICE_START_PRE);
1814         } else
1815                 service_enter_start(s);
1816
1817         return;
1818
1819 fail:
1820         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1821         service_enter_dead(s, false, true);
1822 }
1823
1824 static void service_enter_restart(Service *s) {
1825         int r;
1826         DBusError error;
1827
1828         assert(s);
1829         dbus_error_init(&error);
1830
1831         service_enter_dead(s, true, false);
1832
1833         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
1834                 goto fail;
1835
1836         log_debug("%s scheduled restart job.", s->meta.id);
1837         return;
1838
1839 fail:
1840         log_warning("%s failed to schedule restart job: %s", s->meta.id, bus_error(&error, -r));
1841         service_enter_dead(s, false, false);
1842
1843         dbus_error_free(&error);
1844 }
1845
1846 static void service_enter_reload(Service *s) {
1847         int r;
1848
1849         assert(s);
1850
1851         service_unwatch_control_pid(s);
1852
1853         s->control_command_id = SERVICE_EXEC_RELOAD;
1854         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1855                 if ((r = service_spawn(s,
1856                                        s->control_command,
1857                                        true,
1858                                        false,
1859                                        !s->permissions_start_only,
1860                                        !s->root_directory_start_only,
1861                                        false,
1862                                        false,
1863                                        &s->control_pid)) < 0)
1864                         goto fail;
1865
1866                 service_set_state(s, SERVICE_RELOAD);
1867         } else
1868                 service_enter_running(s, true);
1869
1870         return;
1871
1872 fail:
1873         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
1874         service_enter_stop(s, false);
1875 }
1876
1877 static void service_run_next_control(Service *s, bool success) {
1878         int r;
1879
1880         assert(s);
1881         assert(s->control_command);
1882         assert(s->control_command->command_next);
1883
1884         if (!success)
1885                 s->failure = true;
1886
1887         assert(s->control_command_id != SERVICE_EXEC_START);
1888
1889         s->control_command = s->control_command->command_next;
1890         service_unwatch_control_pid(s);
1891
1892         if ((r = service_spawn(s,
1893                                s->control_command,
1894                                true,
1895                                false,
1896                                !s->permissions_start_only,
1897                                !s->root_directory_start_only,
1898                                s->control_command_id == SERVICE_EXEC_START_PRE ||
1899                                s->control_command_id == SERVICE_EXEC_STOP_POST,
1900                                false,
1901                                &s->control_pid)) < 0)
1902                 goto fail;
1903
1904         return;
1905
1906 fail:
1907         log_warning("%s failed to run next control task: %s", s->meta.id, strerror(-r));
1908
1909         if (s->state == SERVICE_START_PRE)
1910                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1911         else if (s->state == SERVICE_STOP)
1912                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1913         else if (s->state == SERVICE_STOP_POST)
1914                 service_enter_dead(s, false, true);
1915         else
1916                 service_enter_stop(s, false);
1917 }
1918
1919 static void service_run_next_main(Service *s, bool success) {
1920         pid_t pid;
1921         int r;
1922
1923         assert(s);
1924         assert(s->control_command);
1925         assert(s->control_command->command_next);
1926
1927         if (!success)
1928                 s->failure = true;
1929
1930         assert(s->control_command_id == SERVICE_EXEC_START);
1931         assert(s->type == SERVICE_ONESHOT);
1932
1933         s->control_command = s->control_command->command_next;
1934         service_unwatch_main_pid(s);
1935
1936         if ((r = service_spawn(s,
1937                                s->control_command,
1938                                false,
1939                                true,
1940                                true,
1941                                true,
1942                                true,
1943                                s->notify_access != NOTIFY_NONE,
1944                                &pid)) < 0)
1945                 goto fail;
1946
1947         service_set_main_pid(s, pid);
1948
1949         return;
1950
1951 fail:
1952         log_warning("%s failed to run next main task: %s", s->meta.id, strerror(-r));
1953         service_enter_stop(s, false);
1954 }
1955
1956 static int service_start(Unit *u) {
1957         Service *s = SERVICE(u);
1958
1959         assert(s);
1960
1961         /* We cannot fulfill this request right now, try again later
1962          * please! */
1963         if (s->state == SERVICE_STOP ||
1964             s->state == SERVICE_STOP_SIGTERM ||
1965             s->state == SERVICE_STOP_SIGKILL ||
1966             s->state == SERVICE_STOP_POST ||
1967             s->state == SERVICE_FINAL_SIGTERM ||
1968             s->state == SERVICE_FINAL_SIGKILL)
1969                 return -EAGAIN;
1970
1971         /* Already on it! */
1972         if (s->state == SERVICE_START_PRE ||
1973             s->state == SERVICE_START ||
1974             s->state == SERVICE_START_POST)
1975                 return 0;
1976
1977         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
1978
1979         /* Make sure we don't enter a busy loop of some kind. */
1980         if (!ratelimit_test(&s->ratelimit)) {
1981                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1982                 return -ECANCELED;
1983         }
1984
1985         if ((s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1986              s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1987              s->exec_context.std_error == EXEC_OUTPUT_SOCKET) &&
1988             s->socket_fd < 0) {
1989                 log_warning("%s can only be started with a per-connection socket.", u->meta.id);
1990                 return -EINVAL;
1991         }
1992
1993         s->failure = false;
1994         s->main_pid_known = false;
1995         s->forbid_restart = false;
1996
1997         service_enter_start_pre(s);
1998         return 0;
1999 }
2000
2001 static int service_stop(Unit *u) {
2002         Service *s = SERVICE(u);
2003
2004         assert(s);
2005
2006         /* This is a user request, so don't do restarts on this
2007          * shutdown. */
2008         s->forbid_restart = true;
2009
2010         /* Already on it */
2011         if (s->state == SERVICE_STOP ||
2012             s->state == SERVICE_STOP_SIGTERM ||
2013             s->state == SERVICE_STOP_SIGKILL ||
2014             s->state == SERVICE_STOP_POST ||
2015             s->state == SERVICE_FINAL_SIGTERM ||
2016             s->state == SERVICE_FINAL_SIGKILL)
2017                 return 0;
2018
2019         /* Don't allow a restart */
2020         if (s->state == SERVICE_AUTO_RESTART) {
2021                 service_set_state(s, SERVICE_DEAD);
2022                 return 0;
2023         }
2024
2025         /* If there's already something running we go directly into
2026          * kill mode. */
2027         if (s->state == SERVICE_START_PRE ||
2028             s->state == SERVICE_START ||
2029             s->state == SERVICE_START_POST ||
2030             s->state == SERVICE_RELOAD) {
2031                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
2032                 return 0;
2033         }
2034
2035         assert(s->state == SERVICE_RUNNING ||
2036                s->state == SERVICE_EXITED);
2037
2038         service_enter_stop(s, true);
2039         return 0;
2040 }
2041
2042 static int service_reload(Unit *u) {
2043         Service *s = SERVICE(u);
2044
2045         assert(s);
2046
2047         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2048
2049         service_enter_reload(s);
2050         return 0;
2051 }
2052
2053 static bool service_can_reload(Unit *u) {
2054         Service *s = SERVICE(u);
2055
2056         assert(s);
2057
2058         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2059 }
2060
2061 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2062         Service *s = SERVICE(u);
2063
2064         assert(u);
2065         assert(f);
2066         assert(fds);
2067
2068         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2069         unit_serialize_item(u, f, "failure", yes_no(s->failure));
2070
2071         if (s->control_pid > 0)
2072                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2073
2074         if (s->main_pid_known && s->main_pid > 0)
2075                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2076
2077         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2078
2079         if (s->status_text)
2080                 unit_serialize_item(u, f, "status-text", s->status_text);
2081
2082         /* There's a minor uncleanliness here: if there are multiple
2083          * commands attached here, we will start from the first one
2084          * again */
2085         if (s->control_command_id >= 0)
2086                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2087
2088         if (s->socket_fd >= 0) {
2089                 int copy;
2090
2091                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2092                         return copy;
2093
2094                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2095         }
2096
2097         if (s->main_exec_status.pid > 0) {
2098                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2099
2100                 if (s->main_exec_status.start_timestamp.realtime > 0) {
2101                         unit_serialize_item_format(u, f, "main-exec-status-start-realtime",
2102                                                    "%llu", (unsigned long long) s->main_exec_status.start_timestamp.realtime);
2103
2104                         unit_serialize_item_format(u, f, "main-exec-status-start-monotonic",
2105                                                    "%llu", (unsigned long long) s->main_exec_status.start_timestamp.monotonic);
2106                 }
2107
2108                 if (s->main_exec_status.exit_timestamp.realtime > 0) {
2109                         unit_serialize_item_format(u, f, "main-exec-status-exit-realtime",
2110                                                    "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.realtime);
2111                         unit_serialize_item_format(u, f, "main-exec-status-exit-monotonic",
2112                                                    "%llu", (unsigned long long) s->main_exec_status.exit_timestamp.monotonic);
2113
2114                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2115                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2116                 }
2117         }
2118
2119         return 0;
2120 }
2121
2122 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2123         Service *s = SERVICE(u);
2124
2125         assert(u);
2126         assert(key);
2127         assert(value);
2128         assert(fds);
2129
2130         if (streq(key, "state")) {
2131                 ServiceState state;
2132
2133                 if ((state = service_state_from_string(value)) < 0)
2134                         log_debug("Failed to parse state value %s", value);
2135                 else
2136                         s->deserialized_state = state;
2137         } else if (streq(key, "failure")) {
2138                 int b;
2139
2140                 if ((b = parse_boolean(value)) < 0)
2141                         log_debug("Failed to parse failure value %s", value);
2142                 else
2143                         s->failure = b || s->failure;
2144         } else if (streq(key, "control-pid")) {
2145                 pid_t pid;
2146
2147                 if (parse_pid(value, &pid) < 0)
2148                         log_debug("Failed to parse control-pid value %s", value);
2149                 else
2150                         s->control_pid = pid;
2151         } else if (streq(key, "main-pid")) {
2152                 pid_t pid;
2153
2154                 if (parse_pid(value, &pid) < 0)
2155                         log_debug("Failed to parse main-pid value %s", value);
2156                 else
2157                         service_set_main_pid(s, (pid_t) pid);
2158         } else if (streq(key, "main-pid-known")) {
2159                 int b;
2160
2161                 if ((b = parse_boolean(value)) < 0)
2162                         log_debug("Failed to parse main-pid-known value %s", value);
2163                 else
2164                         s->main_pid_known = b;
2165         } else if (streq(key, "status-text")) {
2166                 char *t;
2167
2168                 if ((t = strdup(value))) {
2169                         free(s->status_text);
2170                         s->status_text = t;
2171                 }
2172
2173         } else if (streq(key, "control-command")) {
2174                 ServiceExecCommand id;
2175
2176                 if ((id = service_exec_command_from_string(value)) < 0)
2177                         log_debug("Failed to parse exec-command value %s", value);
2178                 else {
2179                         s->control_command_id = id;
2180                         s->control_command = s->exec_command[id];
2181                 }
2182         } else if (streq(key, "socket-fd")) {
2183                 int fd;
2184
2185                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2186                         log_debug("Failed to parse socket-fd value %s", value);
2187                 else {
2188
2189                         if (s->socket_fd >= 0)
2190                                 close_nointr_nofail(s->socket_fd);
2191                         s->socket_fd = fdset_remove(fds, fd);
2192                 }
2193         } else if (streq(key, "main-exec-status-pid")) {
2194                 pid_t pid;
2195
2196                 if (parse_pid(value, &pid) < 0)
2197                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2198                 else
2199                         s->main_exec_status.pid = pid;
2200         } else if (streq(key, "main-exec-status-code")) {
2201                 int i;
2202
2203                 if (safe_atoi(value, &i) < 0)
2204                         log_debug("Failed to parse main-exec-status-code value %s", value);
2205                 else
2206                         s->main_exec_status.code = i;
2207         } else if (streq(key, "main-exec-status-status")) {
2208                 int i;
2209
2210                 if (safe_atoi(value, &i) < 0)
2211                         log_debug("Failed to parse main-exec-status-status value %s", value);
2212                 else
2213                         s->main_exec_status.status = i;
2214         } else if (streq(key, "main-exec-status-start-realtime")) {
2215                 uint64_t k;
2216
2217                 if (safe_atou64(value, &k) < 0)
2218                         log_debug("Failed to parse main-exec-status-start-realtime value %s", value);
2219                 else
2220                         s->main_exec_status.start_timestamp.realtime = (usec_t) k;
2221         } else if (streq(key, "main-exec-status-start-monotonic")) {
2222                 uint64_t k;
2223
2224                 if (safe_atou64(value, &k) < 0)
2225                         log_debug("Failed to parse main-exec-status-start-monotonic value %s", value);
2226                 else
2227                         s->main_exec_status.start_timestamp.monotonic = (usec_t) k;
2228         } else if (streq(key, "main-exec-status-exit-realtime")) {
2229                 uint64_t k;
2230
2231                 if (safe_atou64(value, &k) < 0)
2232                         log_debug("Failed to parse main-exec-status-exit-realtime value %s", value);
2233                 else
2234                         s->main_exec_status.exit_timestamp.realtime = (usec_t) k;
2235         } else if (streq(key, "main-exec-status-exit-monotonic")) {
2236                 uint64_t k;
2237
2238                 if (safe_atou64(value, &k) < 0)
2239                         log_debug("Failed to parse main-exec-status-exit-monotonic value %s", value);
2240                 else
2241                         s->main_exec_status.exit_timestamp.monotonic = (usec_t) k;
2242         } else
2243                 log_debug("Unknown serialization key '%s'", key);
2244
2245         return 0;
2246 }
2247
2248 static UnitActiveState service_active_state(Unit *u) {
2249         assert(u);
2250
2251         return state_translation_table[SERVICE(u)->state];
2252 }
2253
2254 static const char *service_sub_state_to_string(Unit *u) {
2255         assert(u);
2256
2257         return service_state_to_string(SERVICE(u)->state);
2258 }
2259
2260 static bool service_check_gc(Unit *u) {
2261         Service *s = SERVICE(u);
2262
2263         assert(s);
2264
2265         return !!s->sysv_path;
2266 }
2267
2268 static bool service_check_snapshot(Unit *u) {
2269         Service *s = SERVICE(u);
2270
2271         assert(s);
2272
2273         return !s->got_socket_fd;
2274 }
2275
2276 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2277         Service *s = SERVICE(u);
2278         bool success;
2279
2280         assert(s);
2281         assert(pid >= 0);
2282
2283         if (!s->meta.fragment_path)
2284                 success = is_clean_exit_lsb(code, status);
2285         else
2286                 success = is_clean_exit(code, status);
2287
2288         if (s->main_pid == pid) {
2289
2290                 s->main_pid = 0;
2291                 exec_status_exit(&s->main_exec_status, pid, code, status);
2292
2293                 if (s->type != SERVICE_FORKING && s->control_command) {
2294                         s->control_command->exec_status = s->main_exec_status;
2295
2296                         if (s->control_command->ignore)
2297                                 success = true;
2298                 }
2299
2300                 log_full(success ? LOG_DEBUG : LOG_NOTICE,
2301                          "%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2302                 s->failure = s->failure || !success;
2303
2304                 if (s->control_command &&
2305                     s->control_command->command_next &&
2306                     success) {
2307
2308                         /* There is another command to *
2309                          * execute, so let's do that. */
2310
2311                         log_debug("%s running next main command for state %s", u->meta.id, service_state_to_string(s->state));
2312                         service_run_next_main(s, success);
2313
2314                 } else {
2315
2316                         /* The service exited, so the service is officially
2317                          * gone. */
2318
2319                         s->control_command = NULL;
2320                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2321
2322                         switch (s->state) {
2323
2324                         case SERVICE_START_POST:
2325                         case SERVICE_RELOAD:
2326                         case SERVICE_STOP:
2327                                 /* Need to wait until the operation is
2328                                  * done */
2329                                 break;
2330
2331                         case SERVICE_START:
2332                                 if (s->type == SERVICE_ONESHOT) {
2333                                         /* This was our main goal, so let's go on */
2334                                         if (success)
2335                                                 service_enter_start_post(s);
2336                                         else
2337                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2338                                         break;
2339                                 } else {
2340                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2341
2342                                         /* Fall through */
2343                                 }
2344
2345                         case SERVICE_RUNNING:
2346                                 service_enter_running(s, success);
2347                                 break;
2348
2349                         case SERVICE_STOP_SIGTERM:
2350                         case SERVICE_STOP_SIGKILL:
2351
2352                                 if (!control_pid_good(s))
2353                                         service_enter_stop_post(s, success);
2354
2355                                 /* If there is still a control process, wait for that first */
2356                                 break;
2357
2358                         default:
2359                                 assert_not_reached("Uh, main process died at wrong time.");
2360                         }
2361                 }
2362
2363         } else if (s->control_pid == pid) {
2364
2365                 s->control_pid = 0;
2366
2367                 if (s->control_command) {
2368                         exec_status_exit(&s->control_command->exec_status, pid, code, status);
2369
2370                         if (s->control_command->ignore)
2371                                 success = true;
2372                 }
2373
2374                log_full(success ? LOG_DEBUG : LOG_NOTICE,
2375                          "%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2376                 s->failure = s->failure || !success;
2377
2378                 if (s->control_command &&
2379                     s->control_command->command_next &&
2380                     success) {
2381
2382                         /* There is another command to *
2383                          * execute, so let's do that. */
2384
2385                         log_debug("%s running next control command for state %s", u->meta.id, service_state_to_string(s->state));
2386                         service_run_next_control(s, success);
2387
2388                 } else {
2389                         /* No further commands for this step, so let's
2390                          * figure out what to do next */
2391
2392                         s->control_command = NULL;
2393                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2394
2395                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2396
2397                         switch (s->state) {
2398
2399                         case SERVICE_START_PRE:
2400                                 if (success)
2401                                         service_enter_start(s);
2402                                 else
2403                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2404                                 break;
2405
2406                         case SERVICE_START:
2407                                 assert(s->type == SERVICE_FORKING);
2408
2409                                 /* Let's try to load the pid
2410                                  * file here if we can. We
2411                                  * ignore the return value,
2412                                  * since the PID file might
2413                                  * actually be created by a
2414                                  * START_POST script */
2415
2416                                 if (success) {
2417                                         if (s->pid_file)
2418                                                 service_load_pid_file(s);
2419
2420                                         service_enter_start_post(s);
2421                                 } else
2422                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2423
2424                                 break;
2425
2426                         case SERVICE_START_POST:
2427                                 if (success && s->pid_file && !s->main_pid_known) {
2428                                         int r;
2429
2430                                         /* Hmm, let's see if we can
2431                                          * load the pid now after the
2432                                          * start-post scripts got
2433                                          * executed. */
2434
2435                                         if ((r = service_load_pid_file(s)) < 0)
2436                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2437                                 }
2438
2439                                 /* Fall through */
2440
2441                         case SERVICE_RELOAD:
2442                                 if (success)
2443                                         service_enter_running(s, true);
2444                                 else
2445                                         service_enter_stop(s, false);
2446
2447                                 break;
2448
2449                         case SERVICE_STOP:
2450                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2451                                 break;
2452
2453                         case SERVICE_STOP_SIGTERM:
2454                         case SERVICE_STOP_SIGKILL:
2455                                 if (main_pid_good(s) <= 0)
2456                                         service_enter_stop_post(s, success);
2457
2458                                 /* If there is still a service
2459                                  * process around, wait until
2460                                  * that one quit, too */
2461                                 break;
2462
2463                         case SERVICE_STOP_POST:
2464                         case SERVICE_FINAL_SIGTERM:
2465                         case SERVICE_FINAL_SIGKILL:
2466                                 service_enter_dead(s, success, true);
2467                                 break;
2468
2469                         default:
2470                                 assert_not_reached("Uh, control process died at wrong time.");
2471                         }
2472                 }
2473         }
2474
2475         /* Notify clients about changed exit status */
2476         unit_add_to_dbus_queue(u);
2477 }
2478
2479 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2480         Service *s = SERVICE(u);
2481
2482         assert(s);
2483         assert(elapsed == 1);
2484
2485         assert(w == &s->timer_watch);
2486
2487         switch (s->state) {
2488
2489         case SERVICE_START_PRE:
2490         case SERVICE_START:
2491                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2492                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2493                 break;
2494
2495         case SERVICE_START_POST:
2496         case SERVICE_RELOAD:
2497                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2498                 service_enter_stop(s, false);
2499                 break;
2500
2501         case SERVICE_STOP:
2502                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2503                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2504                 break;
2505
2506         case SERVICE_STOP_SIGTERM:
2507                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2508                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2509                 break;
2510
2511         case SERVICE_STOP_SIGKILL:
2512                 /* Uh, wie sent a SIGKILL and it is still not gone?
2513                  * Must be something we cannot kill, so let's just be
2514                  * weirded out and continue */
2515
2516                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2517                 service_enter_stop_post(s, false);
2518                 break;
2519
2520         case SERVICE_STOP_POST:
2521                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2522                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2523                 break;
2524
2525         case SERVICE_FINAL_SIGTERM:
2526                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2527                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2528                 break;
2529
2530         case SERVICE_FINAL_SIGKILL:
2531                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->meta.id);
2532                 service_enter_dead(s, false, true);
2533                 break;
2534
2535         case SERVICE_AUTO_RESTART:
2536                 log_info("%s holdoff time over, scheduling restart.", u->meta.id);
2537                 service_enter_restart(s);
2538                 break;
2539
2540         default:
2541                 assert_not_reached("Timeout at wrong time.");
2542         }
2543 }
2544
2545 static void service_cgroup_notify_event(Unit *u) {
2546         Service *s = SERVICE(u);
2547
2548         assert(u);
2549
2550         log_debug("%s: cgroup is empty", u->meta.id);
2551
2552         switch (s->state) {
2553
2554                 /* Waiting for SIGCHLD is usually more interesting,
2555                  * because it includes return codes/signals. Which is
2556                  * why we ignore the cgroup events for most cases,
2557                  * except when we don't know pid which to expect the
2558                  * SIGCHLD for. */
2559
2560         case SERVICE_RUNNING:
2561                 service_enter_running(s, true);
2562                 break;
2563
2564         case SERVICE_STOP_SIGTERM:
2565         case SERVICE_STOP_SIGKILL:
2566                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2567                         service_enter_stop_post(s, true);
2568
2569                 break;
2570
2571         case SERVICE_FINAL_SIGTERM:
2572         case SERVICE_FINAL_SIGKILL:
2573                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
2574                         service_enter_dead(s, true, true);
2575
2576                 break;
2577
2578         default:
2579                 ;
2580         }
2581 }
2582
2583 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2584         Service *s = SERVICE(u);
2585         const char *e;
2586
2587         assert(u);
2588
2589         if (s->notify_access == NOTIFY_NONE) {
2590                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2591                             u->meta.id, (unsigned long) pid);
2592                 return;
2593         }
2594
2595         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2596                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2597                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2598                 return;
2599         }
2600
2601         log_debug("%s: Got message", u->meta.id);
2602
2603         /* Interpret MAINPID= */
2604         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2605             (s->state == SERVICE_START ||
2606              s->state == SERVICE_START_POST ||
2607              s->state == SERVICE_RUNNING ||
2608              s->state == SERVICE_RELOAD)) {
2609
2610                 if (parse_pid(e + 8, &pid) < 0)
2611                         log_warning("Failed to parse notification message %s", e);
2612                 else {
2613                         log_debug("%s: got %s", u->meta.id, e);
2614                         service_set_main_pid(s, pid);
2615                 }
2616         }
2617
2618         /* Interpret READY= */
2619         if (s->type == SERVICE_NOTIFY &&
2620             s->state == SERVICE_START &&
2621             strv_find(tags, "READY=1")) {
2622                 log_debug("%s: got READY=1", u->meta.id);
2623
2624                 service_enter_start_post(s);
2625         }
2626
2627         /* Interpret STATUS= */
2628         if ((e = strv_find_prefix(tags, "STATUS="))) {
2629                 char *t;
2630
2631                 if (e[7]) {
2632                         if (!(t = strdup(e+7))) {
2633                                 log_error("Failed to allocate string.");
2634                                 return;
2635                         }
2636
2637                         log_debug("%s: got %s", u->meta.id, e);
2638
2639                         free(s->status_text);
2640                         s->status_text = t;
2641                 } else {
2642                         free(s->status_text);
2643                         s->status_text = NULL;
2644                 }
2645
2646         }
2647
2648         /* Notify clients about changed status or main pid */
2649         unit_add_to_dbus_queue(u);
2650 }
2651
2652 static int service_enumerate(Manager *m) {
2653         char **p;
2654         unsigned i;
2655         DIR *d = NULL;
2656         char *path = NULL, *fpath = NULL, *name = NULL;
2657         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
2658         Unit *service;
2659         Iterator j;
2660         int r;
2661
2662         assert(m);
2663
2664         zero(runlevel_services);
2665
2666         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2667                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2668                         struct dirent *de;
2669
2670                         free(path);
2671                         path = NULL;
2672                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2673                                 r = -ENOMEM;
2674                                 goto finish;
2675                         }
2676
2677                         if (d)
2678                                 closedir(d);
2679
2680                         if (!(d = opendir(path))) {
2681                                 if (errno != ENOENT)
2682                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2683
2684                                 continue;
2685                         }
2686
2687                         while ((de = readdir(d))) {
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
2733                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
2734                                                 SERVICE(service)->sysv_start_priority =
2735                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2736
2737                                                 SERVICE(service)->sysv_enabled = true;
2738                                         }
2739
2740                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
2741                                                 goto finish;
2742
2743                                         if ((r = set_put(runlevel_services[i], service)) < 0)
2744                                                 goto finish;
2745
2746                                 } else if (de->d_name[0] == 'K' &&
2747                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2748                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2749
2750                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
2751                                                 goto finish;
2752
2753                                         if ((r = set_put(shutdown_services, service)) < 0)
2754                                                 goto finish;
2755                                 }
2756                         }
2757                 }
2758
2759         /* Now we loaded all stubs and are aware of the lowest
2760         start-up priority for all services, not let's actually load
2761         the services, this will also tell us which services are
2762         actually native now */
2763         manager_dispatch_load_queue(m);
2764
2765         /* If this is a native service, rely on native ways to pull in
2766          * a service, don't pull it in via sysv rcN.d links. */
2767         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
2768                 SET_FOREACH(service, runlevel_services[i], j) {
2769                         service = unit_follow_merge(service);
2770
2771                         if (service->meta.fragment_path)
2772                                 continue;
2773
2774                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
2775                                 goto finish;
2776                 }
2777
2778         /* We honour K links only for halt/reboot. For the normal
2779          * runlevels we assume the stop jobs will be implicitly added
2780          * by the core logic. Also, we don't really distuingish here
2781          * between the runlevels 0 and 6 and just add them to the
2782          * special shutdown target. On SUSE the boot.d/ runlevel is
2783          * also used for shutdown, so we add links for that too to the
2784          * shutdown target.*/
2785         SET_FOREACH(service, shutdown_services, j) {
2786                 service = unit_follow_merge(service);
2787
2788                 if (service->meta.fragment_path)
2789                         continue;
2790
2791                 if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
2792                         goto finish;
2793         }
2794
2795         r = 0;
2796
2797 finish:
2798         free(path);
2799         free(fpath);
2800         free(name);
2801
2802         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
2803                 set_free(runlevel_services[i]);
2804         set_free(shutdown_services);
2805
2806         if (d)
2807                 closedir(d);
2808
2809         return r;
2810 }
2811
2812 static void service_bus_name_owner_change(
2813                 Unit *u,
2814                 const char *name,
2815                 const char *old_owner,
2816                 const char *new_owner) {
2817
2818         Service *s = SERVICE(u);
2819
2820         assert(s);
2821         assert(name);
2822
2823         assert(streq(s->bus_name, name));
2824         assert(old_owner || new_owner);
2825
2826         if (old_owner && new_owner)
2827                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2828         else if (old_owner)
2829                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2830         else
2831                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2832
2833         s->bus_name_good = !!new_owner;
2834
2835         if (s->type == SERVICE_DBUS) {
2836
2837                 /* service_enter_running() will figure out what to
2838                  * do */
2839                 if (s->state == SERVICE_RUNNING)
2840                         service_enter_running(s, true);
2841                 else if (s->state == SERVICE_START && new_owner)
2842                         service_enter_start_post(s);
2843
2844         } else if (new_owner &&
2845                    s->main_pid <= 0 &&
2846                    (s->state == SERVICE_START ||
2847                     s->state == SERVICE_START_POST ||
2848                     s->state == SERVICE_RUNNING ||
2849                     s->state == SERVICE_RELOAD)) {
2850
2851                 /* Try to acquire PID from bus service */
2852                 log_debug("Trying to acquire PID from D-Bus name...");
2853
2854                 bus_query_pid(u->meta.manager, name);
2855         }
2856 }
2857
2858 static void service_bus_query_pid_done(
2859                 Unit *u,
2860                 const char *name,
2861                 pid_t pid) {
2862
2863         Service *s = SERVICE(u);
2864
2865         assert(s);
2866         assert(name);
2867
2868         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2869
2870         if (s->main_pid <= 0 &&
2871             (s->state == SERVICE_START ||
2872              s->state == SERVICE_START_POST ||
2873              s->state == SERVICE_RUNNING ||
2874              s->state == SERVICE_RELOAD))
2875                 service_set_main_pid(s, pid);
2876 }
2877
2878 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
2879         assert(s);
2880         assert(fd >= 0);
2881
2882         /* This is called by the socket code when instantiating a new
2883          * service for a stream socket and the socket needs to be
2884          * configured. */
2885
2886         if (s->meta.load_state != UNIT_LOADED)
2887                 return -EINVAL;
2888
2889         if (s->socket_fd >= 0)
2890                 return -EBUSY;
2891
2892         if (s->state != SERVICE_DEAD)
2893                 return -EAGAIN;
2894
2895         s->socket_fd = fd;
2896         s->got_socket_fd = true;
2897         s->socket = sock;
2898
2899         return 0;
2900 }
2901
2902 static void service_reset_failed(Unit *u) {
2903         Service *s = SERVICE(u);
2904
2905         assert(s);
2906
2907         if (s->state == SERVICE_FAILED)
2908                 service_set_state(s, SERVICE_DEAD);
2909
2910         s->failure = false;
2911 }
2912
2913 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2914         [SERVICE_DEAD] = "dead",
2915         [SERVICE_START_PRE] = "start-pre",
2916         [SERVICE_START] = "start",
2917         [SERVICE_START_POST] = "start-post",
2918         [SERVICE_RUNNING] = "running",
2919         [SERVICE_EXITED] = "exited",
2920         [SERVICE_RELOAD] = "reload",
2921         [SERVICE_STOP] = "stop",
2922         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2923         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2924         [SERVICE_STOP_POST] = "stop-post",
2925         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2926         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2927         [SERVICE_FAILED] = "failed",
2928         [SERVICE_AUTO_RESTART] = "auto-restart",
2929 };
2930
2931 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2932
2933 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2934         [SERVICE_ONCE] = "once",
2935         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2936         [SERVICE_RESTART_ALWAYS] = "restart-always",
2937 };
2938
2939 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2940
2941 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2942         [SERVICE_SIMPLE] = "simple",
2943         [SERVICE_FORKING] = "forking",
2944         [SERVICE_ONESHOT] = "oneshot",
2945         [SERVICE_DBUS] = "dbus",
2946         [SERVICE_NOTIFY] = "notify"
2947 };
2948
2949 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2950
2951 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2952         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2953         [SERVICE_EXEC_START] = "ExecStart",
2954         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2955         [SERVICE_EXEC_RELOAD] = "ExecReload",
2956         [SERVICE_EXEC_STOP] = "ExecStop",
2957         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2958 };
2959
2960 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2961
2962 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
2963         [NOTIFY_NONE] = "none",
2964         [NOTIFY_MAIN] = "main",
2965         [NOTIFY_ALL] = "all"
2966 };
2967
2968 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
2969
2970 const UnitVTable service_vtable = {
2971         .suffix = ".service",
2972         .show_status = true,
2973
2974         .init = service_init,
2975         .done = service_done,
2976         .load = service_load,
2977
2978         .coldplug = service_coldplug,
2979
2980         .dump = service_dump,
2981
2982         .start = service_start,
2983         .stop = service_stop,
2984         .reload = service_reload,
2985
2986         .can_reload = service_can_reload,
2987
2988         .serialize = service_serialize,
2989         .deserialize_item = service_deserialize_item,
2990
2991         .active_state = service_active_state,
2992         .sub_state_to_string = service_sub_state_to_string,
2993
2994         .check_gc = service_check_gc,
2995         .check_snapshot = service_check_snapshot,
2996
2997         .sigchld_event = service_sigchld_event,
2998         .timer_event = service_timer_event,
2999
3000         .reset_failed = service_reset_failed,
3001
3002         .cgroup_notify_empty = service_cgroup_notify_event,
3003         .notify_message = service_notify_message,
3004
3005         .bus_name_owner_change = service_bus_name_owner_change,
3006         .bus_query_pid_done = service_bus_query_pid_done,
3007
3008         .bus_interface = "org.freedesktop.systemd1.Service",
3009         .bus_message_handler = bus_service_message_handler,
3010         .bus_invalidating_properties =  bus_service_invalidating_properties,
3011
3012         .enumerate = service_enumerate
3013 };