src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36
  37 #define COMMENTS "#;\n"
  38 #define NEWLINES "\n\r"
  39 #define LINE_MAX 4096
  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 */
  53         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  54         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  55         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  56         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  57         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  58         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  59         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN },
  60
  61         /* SUSE style boot.d */
  62         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  63
  64         /* Debian style rcS.d */
  65         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  66 };
  67
  68 #define RUNLEVELS_UP "12345"
  69 /* #define RUNLEVELS_DOWN "06" */
  70 /* #define RUNLEVELS_BOOT "bBsS" */
  71
  72 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  73         [SERVICE_DEAD] = UNIT_INACTIVE,
  74         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  75         [SERVICE_START] = UNIT_ACTIVATING,
  76         [SERVICE_START_POST] = UNIT_ACTIVATING,
  77         [SERVICE_RUNNING] = UNIT_ACTIVE,
  78         [SERVICE_EXITED] = UNIT_ACTIVE,
  79         [SERVICE_RELOAD] = UNIT_RELOADING,
  80         [SERVICE_STOP] = UNIT_DEACTIVATING,
  81         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  82         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  83         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  84         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  85         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  86         [SERVICE_MAINTENANCE] = UNIT_MAINTENANCE,
  87         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
  88 };
  89
  90 static void service_init(Unit *u) {
  91         Service *s = SERVICE(u);
  92
  93         assert(u);
  94         assert(u->meta.load_state == UNIT_STUB);
  95
  96         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  97         s->restart_usec = DEFAULT_RESTART_USEC;
  98         s->timer_watch.type = WATCH_INVALID;
  99         s->sysv_start_priority = -1;
 100         s->socket_fd = -1;
 101
 102         exec_context_init(&s->exec_context);
 103
 104         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 105
 106         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 107 }
 108
 109 static void service_unwatch_control_pid(Service *s) {
 110         assert(s);
 111
 112         if (s->control_pid <= 0)
 113                 return;
 114
 115         unit_unwatch_pid(UNIT(s), s->control_pid);
 116         s->control_pid = 0;
 117 }
 118
 119 static void service_unwatch_main_pid(Service *s) {
 120         assert(s);
 121
 122         if (s->main_pid <= 0)
 123                 return;
 124
 125         unit_unwatch_pid(UNIT(s), s->main_pid);
 126         s->main_pid = 0;
 127 }
 128
 129 static int service_set_main_pid(Service *s, pid_t pid) {
 130         pid_t ppid;
 131
 132         assert(s);
 133
 134         if (pid <= 1)
 135                 return -EINVAL;
 136
 137         if (pid == getpid())
 138                 return -EINVAL;
 139
 140         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 141                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 142                             s->meta.id, (unsigned long) pid);
 143
 144         s->main_pid = pid;
 145         s->main_pid_known = true;
 146
 147         exec_status_start(&s->main_exec_status, pid);
 148
 149         return 0;
 150 }
 151
 152 static void service_close_socket_fd(Service *s) {
 153         assert(s);
 154
 155         if (s->socket_fd < 0)
 156                 return;
 157
 158         close_nointr_nofail(s->socket_fd);
 159         s->socket_fd = -1;
 160 }
 161
 162 static void service_connection_unref(Service *s) {
 163         assert(s);
 164
 165         if (!s->socket)
 166                 return;
 167
 168         socket_connection_unref(s->socket);
 169         s->socket = NULL;
 170 }
 171
 172 static void service_done(Unit *u) {
 173         Service *s = SERVICE(u);
 174
 175         assert(s);
 176
 177         free(s->pid_file);
 178         s->pid_file = NULL;
 179
 180         free(s->sysv_path);
 181         s->sysv_path = NULL;
 182
 183         free(s->sysv_runlevels);
 184         s->sysv_runlevels = NULL;
 185
 186         free(s->status_text);
 187         s->status_text = NULL;
 188
 189         exec_context_done(&s->exec_context);
 190         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 191         s->control_command = NULL;
 192
 193         /* This will leak a process, but at least no memory or any of
 194          * our resources */
 195         service_unwatch_main_pid(s);
 196         service_unwatch_control_pid(s);
 197
 198         if (s->bus_name)  {
 199                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 200                 free(s->bus_name);
 201                 s->bus_name = NULL;
 202         }
 203
 204         service_close_socket_fd(s);
 205         service_connection_unref(s);
 206
 207         unit_unwatch_timer(u, &s->timer_watch);
 208 }
 209
 210 static char *sysv_translate_name(const char *name) {
 211         char *r;
 212
 213         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 214                 return NULL;
 215
 216         if (startswith(name, "boot."))
 217                 /* Drop SuSE-style boot. prefix */
 218                 strcpy(stpcpy(r, name + 5), ".service");
 219         else if (endswith(name, ".sh"))
 220                 /* Drop Debian-style .sh suffix */
 221                 strcpy(stpcpy(r, name) - 3, ".service");
 222         else
 223                 /* Normal init scripts */
 224                 strcpy(stpcpy(r, name), ".service");
 225
 226         return r;
 227 }
 228
 229 static int sysv_translate_facility(const char *name, char **_r) {
 230
 231         static const char * const table[] = {
 232                 /* LSB defined facilities */
 233                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 234                 "$network",   SPECIAL_NETWORK_TARGET,
 235                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 236                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 237                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 238                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 239                 "$time",      SPECIAL_RTC_SET_TARGET,
 240
 241                 /* Debian extensions */
 242                 "$mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 243                 "$mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 244                 "$x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE
 245         };
 246
 247         unsigned i;
 248         char *r;
 249
 250         for (i = 0; i < ELEMENTSOF(table); i += 2)
 251                 if (streq(table[i], name)) {
 252                         if (!(r = strdup(table[i+1])))
 253                                 return -ENOMEM;
 254
 255                         goto finish;
 256                 }
 257
 258         if (*name == '$')
 259                 return 0;
 260
 261         if (!(r = sysv_translate_name(name)))
 262                 return -ENOMEM;
 263
 264 finish:
 265
 266         if (_r)
 267                 *_r = r;
 268
 269         return 1;
 270 }
 271
 272 static int sysv_fix_order(Service *s) {
 273         Meta *other;
 274         int r;
 275
 276         assert(s);
 277
 278         if (s->sysv_start_priority < 0)
 279                 return 0;
 280
 281         /* For each pair of services where at least one lacks a LSB
 282          * header, we use the start priority value to order things. */
 283
 284         LIST_FOREACH(units_per_type, other, s->meta.manager->units_per_type[UNIT_SERVICE]) {
 285                 Service *t;
 286                 UnitDependency d;
 287
 288                 t = (Service*) other;
 289
 290                 if (s == t)
 291                         continue;
 292
 293                 if (t->sysv_start_priority < 0)
 294                         continue;
 295
 296                 /* If both units have modern headers we don't care
 297                  * about the priorities */
 298                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 299                     (!t->sysv_path || t->sysv_has_lsb))
 300                         continue;
 301
 302                 if (t->sysv_start_priority < s->sysv_start_priority)
 303                         d = UNIT_AFTER;
 304                 else if (t->sysv_start_priority > s->sysv_start_priority)
 305                         d = UNIT_BEFORE;
 306                 else
 307                         continue;
 308
 309                 /* FIXME: Maybe we should compare the name here lexicographically? */
 310
 311                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 312                         return r;
 313         }
 314
 315         return 0;
 316 }
 317
 318 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 319         ExecCommand *c;
 320
 321         if (!(c = new0(ExecCommand, 1)))
 322                 return NULL;
 323
 324         if (!(c->path = strdup(path))) {
 325                 free(c);
 326                 return NULL;
 327         }
 328
 329         if (!(c->argv = strv_new(path, arg1, NULL))) {
 330                 free(c->path);
 331                 free(c);
 332                 return NULL;
 333         }
 334
 335         return c;
 336 }
 337
 338 static int sysv_exec_commands(Service *s) {
 339         ExecCommand *c;
 340
 341         assert(s);
 342         assert(s->sysv_path);
 343
 344         if (!(c = exec_command_new(s->sysv_path, "start")))
 345                 return -ENOMEM;
 346         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 347
 348         if (!(c = exec_command_new(s->sysv_path, "stop")))
 349                 return -ENOMEM;
 350         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 351
 352         if (!(c = exec_command_new(s->sysv_path, "reload")))
 353                 return -ENOMEM;
 354         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 355
 356         return 0;
 357 }
 358
 359 static int service_load_sysv_path(Service *s, const char *path) {
 360         FILE *f;
 361         Unit *u;
 362         unsigned line = 0;
 363         int r;
 364         enum {
 365                 NORMAL,
 366                 DESCRIPTION,
 367                 LSB,
 368                 LSB_DESCRIPTION
 369         } state = NORMAL;
 370
 371         assert(s);
 372         assert(path);
 373
 374         u = UNIT(s);
 375
 376         if (!(f = fopen(path, "re"))) {
 377                 r = errno == ENOENT ? 0 : -errno;
 378                 goto finish;
 379         }
 380
 381         free(s->sysv_path);
 382         if (!(s->sysv_path = strdup(path))) {
 383                 r = -ENOMEM;
 384                 goto finish;
 385         }
 386
 387         while (!feof(f)) {
 388                 char l[LINE_MAX], *t;
 389
 390                 if (!fgets(l, sizeof(l), f)) {
 391                         if (feof(f))
 392                                 break;
 393
 394                         r = -errno;
 395                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 396                         goto finish;
 397                 }
 398
 399                 line++;
 400
 401                 t = strstrip(l);
 402                 if (*t != '#')
 403                         continue;
 404
 405                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 406                         state = LSB;
 407                         s->sysv_has_lsb = true;
 408                         continue;
 409                 }
 410
 411                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 412                         state = NORMAL;
 413                         continue;
 414                 }
 415
 416                 t++;
 417                 t += strspn(t, WHITESPACE);
 418
 419                 if (state == NORMAL) {
 420
 421                         /* Try to parse Red Hat style chkconfig headers */
 422
 423                         if (startswith_no_case(t, "chkconfig:")) {
 424                                 int start_priority;
 425                                 char runlevels[16], *k;
 426
 427                                 state = NORMAL;
 428
 429                                 if (sscanf(t+10, "%15s %i %*i",
 430                                            runlevels,
 431                                            &start_priority) != 2) {
 432
 433                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 434                                         continue;
 435                                 }
 436
 437                                 /* A start priority gathered from the
 438                                  * symlink farms is preferred over the
 439                                  * data from the LSB header. */
 440                                 if (start_priority < 0 || start_priority > 99)
 441                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 442                                 else if (s->sysv_start_priority < 0)
 443                                         s->sysv_start_priority = start_priority;
 444
 445                                 char_array_0(runlevels);
 446                                 k = delete_chars(runlevels, WHITESPACE "-");
 447
 448                                 if (k[0]) {
 449                                         char *d;
 450
 451                                         if (!(d = strdup(k))) {
 452                                                 r = -ENOMEM;
 453                                                 goto finish;
 454                                         }
 455
 456                                         free(s->sysv_runlevels);
 457                                         s->sysv_runlevels = d;
 458                                 }
 459
 460                         } else if (startswith_no_case(t, "description:")) {
 461
 462                                 size_t k = strlen(t);
 463                                 char *d;
 464
 465                                 if (t[k-1] == '\\') {
 466                                         state = DESCRIPTION;
 467                                         t[k-1] = 0;
 468                                 }
 469
 470                                 if (!(d = strdup(strstrip(t+12)))) {
 471                                         r = -ENOMEM;
 472                                         goto finish;
 473                                 }
 474
 475                                 free(u->meta.description);
 476                                 u->meta.description = d;
 477
 478                         } else if (startswith_no_case(t, "pidfile:")) {
 479
 480                                 char *fn;
 481
 482                                 state = NORMAL;
 483
 484                                 fn = strstrip(t+8);
 485                                 if (!path_is_absolute(fn)) {
 486                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 487                                         continue;
 488                                 }
 489
 490                                 if (!(fn = strdup(fn))) {
 491                                         r = -ENOMEM;
 492                                         goto finish;
 493                                 }
 494
 495                                 free(s->pid_file);
 496                                 s->pid_file = fn;
 497                         }
 498
 499                 } else if (state == DESCRIPTION) {
 500
 501                         /* Try to parse Red Hat style description
 502                          * continuation */
 503
 504                         size_t k = strlen(t);
 505                         char *d;
 506
 507                         if (t[k-1] == '\\')
 508                                 t[k-1] = 0;
 509                         else
 510                                 state = NORMAL;
 511
 512                         assert(u->meta.description);
 513                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 514                                 r = -ENOMEM;
 515                                 goto finish;
 516                         }
 517
 518                         free(u->meta.description);
 519                         u->meta.description = d;
 520
 521                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 522
 523                         if (startswith_no_case(t, "Provides:")) {
 524                                 char *i, *w;
 525                                 size_t z;
 526
 527                                 state = LSB;
 528
 529                                 FOREACH_WORD(w, z, t+9, i) {
 530                                         char *n, *m;
 531
 532                                         if (!(n = strndup(w, z))) {
 533                                                 r = -ENOMEM;
 534                                                 goto finish;
 535                                         }
 536
 537                                         r = sysv_translate_facility(n, &m);
 538                                         free(n);
 539
 540                                         if (r < 0)
 541                                                 goto finish;
 542
 543                                         if (r == 0)
 544                                                 continue;
 545
 546                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 547                                                 r = unit_add_name(u, m);
 548                                         else
 549                                                 r = unit_add_two_dependencies_by_name_inverse(u, UNIT_AFTER, UNIT_REQUIRES, m, NULL, true);
 550
 551                                         free(m);
 552
 553                                         if (r < 0)
 554                                                 goto finish;
 555                                 }
 556
 557                         } else if (startswith_no_case(t, "Required-Start:") ||
 558                                    startswith_no_case(t, "Should-Start:") ||
 559                                    startswith_no_case(t, "X-Start-Before:") ||
 560                                    startswith_no_case(t, "X-Start-After:")) {
 561                                 char *i, *w;
 562                                 size_t z;
 563
 564                                 state = LSB;
 565
 566                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 567                                         char *n, *m;
 568
 569                                         if (!(n = strndup(w, z))) {
 570                                                 r = -ENOMEM;
 571                                                 goto finish;
 572                                         }
 573
 574                                         r = sysv_translate_facility(n, &m);
 575                                         free(n);
 576
 577                                         if (r < 0)
 578                                                 goto finish;
 579
 580                                         if (r == 0)
 581                                                 continue;
 582
 583                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 584                                         free(m);
 585
 586                                         if (r < 0)
 587                                                 goto finish;
 588                                 }
 589                         } else if (startswith_no_case(t, "Default-Start:")) {
 590                                 char *k, *d;
 591
 592                                 state = LSB;
 593
 594                                 k = delete_chars(t+14, WHITESPACE "-");
 595
 596                                 if (k[0] != 0) {
 597                                         if (!(d = strdup(k))) {
 598                                                 r = -ENOMEM;
 599                                                 goto finish;
 600                                         }
 601
 602                                         free(s->sysv_runlevels);
 603                                         s->sysv_runlevels = d;
 604                                 }
 605
 606                         } else if (startswith_no_case(t, "Description:")) {
 607                                 char *d;
 608
 609                                 state = LSB_DESCRIPTION;
 610
 611                                 if (!(d = strdup(strstrip(t+12)))) {
 612                                         r = -ENOMEM;
 613                                         goto finish;
 614                                 }
 615
 616                                 free(u->meta.description);
 617                                 u->meta.description = d;
 618
 619                         } else if (startswith_no_case(t, "Short-Description:") &&
 620                                    !u->meta.description) {
 621                                 char *d;
 622
 623                                 /* We use the short description only
 624                                  * if no long description is set. */
 625
 626                                 state = LSB;
 627
 628                                 if (!(d = strdup(strstrip(t+18)))) {
 629                                         r = -ENOMEM;
 630                                         goto finish;
 631                                 }
 632
 633                                 u->meta.description = d;
 634
 635                         } else if (startswith_no_case(t, "X-Interactive:")) {
 636                                 int b;
 637
 638                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 639                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 640                                         continue;
 641                                 }
 642
 643                                 if (b)
 644                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 645                                 else
 646                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 647
 648                         } else if (state == LSB_DESCRIPTION) {
 649
 650                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 651                                         char *d;
 652
 653                                         assert(u->meta.description);
 654                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 655                                                 r = -ENOMEM;
 656                                                 goto finish;
 657                                         }
 658
 659                                         free(u->meta.description);
 660                                         u->meta.description = d;
 661                                 } else
 662                                         state = LSB;
 663                         }
 664                 }
 665         }
 666
 667         if ((r = sysv_exec_commands(s)) < 0)
 668                 goto finish;
 669
 670         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 671                 /* If there a runlevels configured for this service
 672                  * but none of the standard ones, then we assume this
 673                  * is some special kind of service (which might be
 674                  * needed for early boot) and don't create any links
 675                  * to it. */
 676
 677                 s->meta.default_dependencies = false;
 678
 679                 /* Don't timeout special services during boot (like fsck) */
 680                 s->timeout_usec = 0;
 681         }
 682
 683         /* Special setting for all SysV services */
 684         s->type = SERVICE_FORKING;
 685         s->valid_no_process = true;
 686         s->kill_mode = KILL_PROCESS_GROUP;
 687         s->restart = SERVICE_ONCE;
 688
 689         u->meta.load_state = UNIT_LOADED;
 690         r = 0;
 691
 692 finish:
 693
 694         if (f)
 695                 fclose(f);
 696
 697         return r;
 698 }
 699
 700 static int service_load_sysv_name(Service *s, const char *name) {
 701         char **p;
 702
 703         assert(s);
 704         assert(name);
 705
 706         /* For SysV services we strip the boot. or .sh
 707          * prefixes/suffixes. */
 708         if (startswith(name, "boot.") ||
 709             endswith(name, ".sh.service"))
 710                 return -ENOENT;
 711
 712         STRV_FOREACH(p, s->meta.manager->lookup_paths.sysvinit_path) {
 713                 char *path;
 714                 int r;
 715
 716                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 717                         return -ENOMEM;
 718
 719                 assert(endswith(path, ".service"));
 720                 path[strlen(path)-8] = 0;
 721
 722                 r = service_load_sysv_path(s, path);
 723
 724                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 725                         /* Try Debian style xxx.sh source'able init scripts */
 726                         strcat(path, ".sh");
 727                         r = service_load_sysv_path(s, path);
 728                 }
 729
 730                 free(path);
 731
 732                 if (r >= 0 && s->meta.load_state == UNIT_STUB) {
 733                         /* Try SUSE style boot.xxx init scripts */
 734
 735                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 736                                 return -ENOMEM;
 737
 738                         path[strlen(path)-8] = 0;
 739                         r = service_load_sysv_path(s, path);
 740                         free(path);
 741                 }
 742
 743                 if (r < 0)
 744                         return r;
 745
 746                 if ((s->meta.load_state != UNIT_STUB))
 747                         break;
 748         }
 749
 750         return 0;
 751 }
 752
 753 static int service_load_sysv(Service *s) {
 754         const char *t;
 755         Iterator i;
 756         int r;
 757
 758         assert(s);
 759
 760         /* Load service data from SysV init scripts, preferably with
 761          * LSB headers ... */
 762
 763         if (strv_isempty(s->meta.manager->lookup_paths.sysvinit_path))
 764                 return 0;
 765
 766         if ((t = s->meta.id))
 767                 if ((r = service_load_sysv_name(s, t)) < 0)
 768                         return r;
 769
 770         if (s->meta.load_state == UNIT_STUB)
 771                 SET_FOREACH(t, s->meta.names, i) {
 772                         if (t == s->meta.id)
 773                                 continue;
 774
 775                         if ((r == service_load_sysv_name(s, t)) < 0)
 776                                 return r;
 777
 778                         if (s->meta.load_state != UNIT_STUB)
 779                                 break;
 780                 }
 781
 782         return 0;
 783 }
 784
 785 static int service_add_bus_name(Service *s) {
 786         char *n;
 787         int r;
 788
 789         assert(s);
 790         assert(s->bus_name);
 791
 792         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 793                 return 0;
 794
 795         r = unit_merge_by_name(UNIT(s), n);
 796         free(n);
 797
 798         return r;
 799 }
 800
 801 static int service_verify(Service *s) {
 802         assert(s);
 803
 804         if (s->meta.load_state != UNIT_LOADED)
 805                 return 0;
 806
 807         if (!s->exec_command[SERVICE_EXEC_START]) {
 808                 log_error("%s lacks ExecStart setting. Refusing.", s->meta.id);
 809                 return -EINVAL;
 810         }
 811
 812         if (s->exec_command[SERVICE_EXEC_START]->command_next) {
 813                 log_error("%s has more than one ExecStart setting. Refusing.", s->meta.id);
 814                 return -EINVAL;
 815         }
 816
 817         if (s->type == SERVICE_DBUS && !s->bus_name) {
 818                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", s->meta.id);
 819                 return -EINVAL;
 820         }
 821
 822         if (s->exec_context.pam_name && s->kill_mode != KILL_CONTROL_GROUP) {
 823                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", s->meta.id);
 824                 return -EINVAL;
 825         }
 826
 827         return 0;
 828 }
 829
 830 static int service_add_default_dependencies(Service *s) {
 831         int r;
 832
 833         assert(s);
 834
 835         /* Add a number of automatic dependencies useful for the
 836          * majority of services. */
 837
 838         /* First, pull in base system */
 839         if (s->meta.manager->running_as == MANAGER_SYSTEM) {
 840
 841                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 842                         return r;
 843
 844         } else if (s->meta.manager->running_as == MANAGER_SESSION) {
 845
 846                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
 847                         return r;
 848         }
 849
 850         /* Second, activate normal shutdown */
 851         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
 852 }
 853
 854 static int service_load(Unit *u) {
 855         int r;
 856         Service *s = SERVICE(u);
 857
 858         assert(s);
 859
 860         /* Load a .service file */
 861         if ((r = unit_load_fragment(u)) < 0)
 862                 return r;
 863
 864         /* Load a classic init script as a fallback, if we couldn't find anything */
 865         if (u->meta.load_state == UNIT_STUB)
 866                 if ((r = service_load_sysv(s)) < 0)
 867                         return r;
 868
 869         /* Still nothing found? Then let's give up */
 870         if (u->meta.load_state == UNIT_STUB)
 871                 return -ENOENT;
 872
 873         /* We were able to load something, then let's add in the
 874          * dropin directories. */
 875         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 876                 return r;
 877
 878         /* This is a new unit? Then let's add in some extras */
 879         if (u->meta.load_state == UNIT_LOADED) {
 880                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 881                         return r;
 882
 883                 if ((r = unit_add_default_cgroup(u)) < 0)
 884                         return r;
 885
 886                 if ((r = sysv_fix_order(s)) < 0)
 887                         return r;
 888
 889                 if (s->bus_name) {
 890                         if ((r = service_add_bus_name(s)) < 0)
 891                                 return r;
 892
 893                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 894                                 return r;
 895                 }
 896
 897                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
 898                         s->notify_access = NOTIFY_MAIN;
 899
 900                 if (s->type == SERVICE_DBUS || s->bus_name)
 901                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_TARGET, NULL, true)) < 0)
 902                                 return r;
 903
 904                 if (s->meta.default_dependencies)
 905                         if ((r = service_add_default_dependencies(s)) < 0)
 906                                 return r;
 907         }
 908
 909         return service_verify(s);
 910 }
 911
 912 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 913
 914         ServiceExecCommand c;
 915         Service *s = SERVICE(u);
 916         const char *prefix2;
 917         char *p2;
 918
 919         assert(s);
 920
 921         p2 = strappend(prefix, "\t");
 922         prefix2 = p2 ? p2 : prefix;
 923
 924         fprintf(f,
 925                 "%sService State: %s\n"
 926                 "%sPermissionsStartOnly: %s\n"
 927                 "%sRootDirectoryStartOnly: %s\n"
 928                 "%sValidNoProcess: %s\n"
 929                 "%sKillMode: %s\n"
 930                 "%sType: %s\n"
 931                 "%sNotifyAccess: %s\n",
 932                 prefix, service_state_to_string(s->state),
 933                 prefix, yes_no(s->permissions_start_only),
 934                 prefix, yes_no(s->root_directory_start_only),
 935                 prefix, yes_no(s->valid_no_process),
 936                 prefix, kill_mode_to_string(s->kill_mode),
 937                 prefix, service_type_to_string(s->type),
 938                 prefix, notify_access_to_string(s->notify_access));
 939
 940         if (s->control_pid > 0)
 941                 fprintf(f,
 942                         "%sControl PID: %lu\n",
 943                         prefix, (unsigned long) s->control_pid);
 944
 945         if (s->main_pid > 0)
 946                 fprintf(f,
 947                         "%sMain PID: %lu\n",
 948                         prefix, (unsigned long) s->main_pid);
 949
 950         if (s->pid_file)
 951                 fprintf(f,
 952                         "%sPIDFile: %s\n",
 953                         prefix, s->pid_file);
 954
 955         if (s->bus_name)
 956                 fprintf(f,
 957                         "%sBusName: %s\n"
 958                         "%sBus Name Good: %s\n",
 959                         prefix, s->bus_name,
 960                         prefix, yes_no(s->bus_name_good));
 961
 962         exec_context_dump(&s->exec_context, f, prefix);
 963
 964         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 965
 966                 if (!s->exec_command[c])
 967                         continue;
 968
 969                 fprintf(f, "%s-> %s:\n",
 970                         prefix, service_exec_command_to_string(c));
 971
 972                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 973         }
 974
 975         if (s->sysv_path)
 976                 fprintf(f,
 977                         "%sSysV Init Script Path: %s\n"
 978                         "%sSysV Init Script has LSB Header: %s\n",
 979                         prefix, s->sysv_path,
 980                         prefix, yes_no(s->sysv_has_lsb));
 981
 982         if (s->sysv_start_priority >= 0)
 983                 fprintf(f,
 984                         "%sSysVStartPriority: %i\n",
 985                         prefix, s->sysv_start_priority);
 986
 987         if (s->sysv_runlevels)
 988                 fprintf(f, "%sSysVRunLevels: %s\n",
 989                         prefix, s->sysv_runlevels);
 990
 991         if (s->status_text)
 992                 fprintf(f, "%sStatus Text: %s\n",
 993                         prefix, s->status_text);
 994
 995         free(p2);
 996 }
 997
 998 static int service_load_pid_file(Service *s) {
 999         char *k;
1000         int r;
1001         pid_t pid;
1002
1003         assert(s);
1004
1005         if (s->main_pid_known)
1006                 return 0;
1007
1008         assert(s->main_pid <= 0);
1009
1010         if (!s->pid_file)
1011                 return -ENOENT;
1012
1013         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
1014                 return r;
1015
1016         r = parse_pid(k, &pid);
1017         free(k);
1018
1019         if (r < 0)
1020                 return r;
1021
1022         if (kill(pid, 0) < 0 && errno != EPERM) {
1023                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
1024                             (unsigned long) pid, s->pid_file);
1025                 return -ESRCH;
1026         }
1027
1028         if ((r = service_set_main_pid(s, pid)) < 0)
1029                 return r;
1030
1031         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1032                 /* FIXME: we need to do something here */
1033                 return r;
1034
1035         return 0;
1036 }
1037
1038 static int service_get_sockets(Service *s, Set **_set) {
1039         Set *set;
1040         Iterator i;
1041         char *t;
1042         int r;
1043
1044         assert(s);
1045         assert(_set);
1046
1047         if (s->socket_fd >= 0)
1048                 return 0;
1049
1050         /* Collects all Socket objects that belong to this
1051          * service. Note that a service might have multiple sockets
1052          * via multiple names. */
1053
1054         if (!(set = set_new(NULL, NULL)))
1055                 return -ENOMEM;
1056
1057         SET_FOREACH(t, s->meta.names, i) {
1058                 char *k;
1059                 Unit *p;
1060
1061                 /* Look for all socket objects that go by any of our
1062                  * units and collect their fds */
1063
1064                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1065                         r = -ENOMEM;
1066                         goto fail;
1067                 }
1068
1069                 p = manager_get_unit(s->meta.manager, k);
1070                 free(k);
1071
1072                 if (!p)
1073                         continue;
1074
1075                 if ((r = set_put(set, p)) < 0)
1076                         goto fail;
1077         }
1078
1079         *_set = set;
1080         return 0;
1081
1082 fail:
1083         set_free(set);
1084         return r;
1085 }
1086
1087 static int service_notify_sockets_dead(Service *s) {
1088         Iterator i;
1089         Set *set;
1090         Socket *sock;
1091         int r;
1092
1093         assert(s);
1094
1095         if (s->socket_fd >= 0)
1096                 return 0;
1097
1098         /* Notifies all our sockets when we die */
1099         if ((r = service_get_sockets(s, &set)) < 0)
1100                 return r;
1101
1102         SET_FOREACH(sock, set, i)
1103                 socket_notify_service_dead(sock);
1104
1105         set_free(set);
1106
1107         return 0;
1108 }
1109
1110 static void service_set_state(Service *s, ServiceState state) {
1111         ServiceState old_state;
1112         assert(s);
1113
1114         old_state = s->state;
1115         s->state = state;
1116
1117         if (state != SERVICE_START_PRE &&
1118             state != SERVICE_START &&
1119             state != SERVICE_START_POST &&
1120             state != SERVICE_RELOAD &&
1121             state != SERVICE_STOP &&
1122             state != SERVICE_STOP_SIGTERM &&
1123             state != SERVICE_STOP_SIGKILL &&
1124             state != SERVICE_STOP_POST &&
1125             state != SERVICE_FINAL_SIGTERM &&
1126             state != SERVICE_FINAL_SIGKILL &&
1127             state != SERVICE_AUTO_RESTART)
1128                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1129
1130         if (state != SERVICE_START &&
1131             state != SERVICE_START_POST &&
1132             state != SERVICE_RUNNING &&
1133             state != SERVICE_RELOAD &&
1134             state != SERVICE_STOP &&
1135             state != SERVICE_STOP_SIGTERM &&
1136             state != SERVICE_STOP_SIGKILL)
1137                 service_unwatch_main_pid(s);
1138
1139         if (state != SERVICE_START_PRE &&
1140             state != SERVICE_START &&
1141             state != SERVICE_START_POST &&
1142             state != SERVICE_RELOAD &&
1143             state != SERVICE_STOP &&
1144             state != SERVICE_STOP_SIGTERM &&
1145             state != SERVICE_STOP_SIGKILL &&
1146             state != SERVICE_STOP_POST &&
1147             state != SERVICE_FINAL_SIGTERM &&
1148             state != SERVICE_FINAL_SIGKILL) {
1149                 service_unwatch_control_pid(s);
1150                 s->control_command = NULL;
1151                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1152         }
1153
1154         if (state == SERVICE_DEAD ||
1155             state == SERVICE_STOP ||
1156             state == SERVICE_STOP_SIGTERM ||
1157             state == SERVICE_STOP_SIGKILL ||
1158             state == SERVICE_STOP_POST ||
1159             state == SERVICE_FINAL_SIGTERM ||
1160             state == SERVICE_FINAL_SIGKILL ||
1161             state == SERVICE_MAINTENANCE ||
1162             state == SERVICE_AUTO_RESTART)
1163                 service_notify_sockets_dead(s);
1164
1165         if (state != SERVICE_START_PRE &&
1166             state != SERVICE_START &&
1167             state != SERVICE_START_POST &&
1168             state != SERVICE_RUNNING &&
1169             state != SERVICE_RELOAD &&
1170             state != SERVICE_STOP &&
1171             state != SERVICE_STOP_SIGTERM &&
1172             state != SERVICE_STOP_SIGKILL &&
1173             state != SERVICE_STOP_POST &&
1174             state != SERVICE_FINAL_SIGTERM &&
1175             state != SERVICE_FINAL_SIGKILL &&
1176             !(state == SERVICE_DEAD && s->meta.job)) {
1177                 service_close_socket_fd(s);
1178                 service_connection_unref(s);
1179         }
1180
1181         if (old_state != state)
1182                 log_debug("%s changed %s -> %s", s->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1183
1184         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1185 }
1186
1187 static int service_coldplug(Unit *u) {
1188         Service *s = SERVICE(u);
1189         int r;
1190
1191         assert(s);
1192         assert(s->state == SERVICE_DEAD);
1193
1194         if (s->deserialized_state != s->state) {
1195
1196                 if (s->deserialized_state == SERVICE_START_PRE ||
1197                     s->deserialized_state == SERVICE_START ||
1198                     s->deserialized_state == SERVICE_START_POST ||
1199                     s->deserialized_state == SERVICE_RELOAD ||
1200                     s->deserialized_state == SERVICE_STOP ||
1201                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1202                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1203                     s->deserialized_state == SERVICE_STOP_POST ||
1204                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1205                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1206                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1207
1208                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1209                                 usec_t k;
1210
1211                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1212
1213                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1214                                         return r;
1215                         }
1216                 }
1217
1218                 if ((s->deserialized_state == SERVICE_START &&
1219                      (s->type == SERVICE_FORKING ||
1220                       s->type == SERVICE_DBUS ||
1221                       s->type == SERVICE_FINISH ||
1222                       s->type == SERVICE_NOTIFY)) ||
1223                     s->deserialized_state == SERVICE_START_POST ||
1224                     s->deserialized_state == SERVICE_RUNNING ||
1225                     s->deserialized_state == SERVICE_RELOAD ||
1226                     s->deserialized_state == SERVICE_STOP ||
1227                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1228                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1229                         if (s->main_pid > 0)
1230                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1231                                         return r;
1232
1233                 if (s->deserialized_state == SERVICE_START_PRE ||
1234                     s->deserialized_state == SERVICE_START ||
1235                     s->deserialized_state == SERVICE_START_POST ||
1236                     s->deserialized_state == SERVICE_RELOAD ||
1237                     s->deserialized_state == SERVICE_STOP ||
1238                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1239                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1240                     s->deserialized_state == SERVICE_STOP_POST ||
1241                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1242                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1243                         if (s->control_pid > 0)
1244                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1245                                         return r;
1246
1247                 service_set_state(s, s->deserialized_state);
1248         }
1249
1250         return 0;
1251 }
1252
1253 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1254         Iterator i;
1255         int r;
1256         int *rfds = NULL;
1257         unsigned rn_fds = 0;
1258         Set *set;
1259         Socket *sock;
1260
1261         assert(s);
1262         assert(fds);
1263         assert(n_fds);
1264
1265         if (s->socket_fd >= 0)
1266                 return 0;
1267
1268         if ((r = service_get_sockets(s, &set)) < 0)
1269                 return r;
1270
1271         SET_FOREACH(sock, set, i) {
1272                 int *cfds;
1273                 unsigned cn_fds;
1274
1275                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1276                         goto fail;
1277
1278                 if (!cfds)
1279                         continue;
1280
1281                 if (!rfds) {
1282                         rfds = cfds;
1283                         rn_fds = cn_fds;
1284                 } else {
1285                         int *t;
1286
1287                         if (!(t = new(int, rn_fds+cn_fds))) {
1288                                 free(cfds);
1289                                 r = -ENOMEM;
1290                                 goto fail;
1291                         }
1292
1293                         memcpy(t, rfds, rn_fds);
1294                         memcpy(t+rn_fds, cfds, cn_fds);
1295                         free(rfds);
1296                         free(cfds);
1297
1298                         rfds = t;
1299                         rn_fds = rn_fds+cn_fds;
1300                 }
1301         }
1302
1303         *fds = rfds;
1304         *n_fds = rn_fds;
1305
1306         set_free(set);
1307
1308         return 0;
1309
1310 fail:
1311         set_free(set);
1312         free(rfds);
1313
1314         return r;
1315 }
1316
1317 static int service_spawn(
1318                 Service *s,
1319                 ExecCommand *c,
1320                 bool timeout,
1321                 bool pass_fds,
1322                 bool apply_permissions,
1323                 bool apply_chroot,
1324                 bool set_notify_socket,
1325                 pid_t *_pid) {
1326
1327         pid_t pid;
1328         int r;
1329         int *fds = NULL, *fdsbuf = NULL;
1330         unsigned n_fds = 0;
1331         char **argv = NULL, **env = NULL;
1332
1333         assert(s);
1334         assert(c);
1335         assert(_pid);
1336
1337         if (pass_fds ||
1338             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1339             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1340             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1341
1342                 if (s->socket_fd >= 0) {
1343                         fds = &s->socket_fd;
1344                         n_fds = 1;
1345                 } else {
1346                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1347                                 goto fail;
1348
1349                         fds = fdsbuf;
1350                 }
1351         }
1352
1353         if (timeout && s->timeout_usec) {
1354                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1355                         goto fail;
1356         } else
1357                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1358
1359         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1360                 r = -ENOMEM;
1361                 goto fail;
1362         }
1363
1364         if (set_notify_socket) {
1365                 char *t;
1366
1367                 if (asprintf(&t, "NOTIFY_SOCKET=@%s", s->meta.manager->notify_socket) < 0) {
1368                         r = -ENOMEM;
1369                         goto fail;
1370                 }
1371
1372                 env = strv_env_set(s->meta.manager->environment, t);
1373                 free(t);
1374
1375                 if (!env) {
1376                         r = -ENOMEM;
1377                         goto fail;
1378                 }
1379         } else
1380                 env = s->meta.manager->environment;
1381
1382         r = exec_spawn(c,
1383                        argv,
1384                        &s->exec_context,
1385                        fds, n_fds,
1386                        env,
1387                        apply_permissions,
1388                        apply_chroot,
1389                        s->meta.manager->confirm_spawn,
1390                        s->meta.cgroup_bondings,
1391                        &pid);
1392
1393         strv_free(argv);
1394         argv = NULL;
1395
1396         if (set_notify_socket)
1397                 strv_free(env);
1398         env = NULL;
1399
1400         if (r < 0)
1401                 goto fail;
1402
1403         if (fdsbuf)
1404                 free(fdsbuf);
1405
1406         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1407                 /* FIXME: we need to do something here */
1408                 goto fail;
1409
1410         *_pid = pid;
1411
1412         return 0;
1413
1414 fail:
1415         free(fds);
1416
1417         strv_free(argv);
1418
1419         if (set_notify_socket)
1420                 strv_free(env);
1421
1422         if (timeout)
1423                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1424
1425         return r;
1426 }
1427
1428 static int main_pid_good(Service *s) {
1429         assert(s);
1430
1431         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1432          * don't know */
1433
1434         /* If we know the pid file, then lets just check if it is
1435          * still valid */
1436         if (s->main_pid_known)
1437                 return s->main_pid > 0;
1438
1439         /* We don't know the pid */
1440         return -EAGAIN;
1441 }
1442
1443 static int control_pid_good(Service *s) {
1444         assert(s);
1445
1446         return s->control_pid > 0;
1447 }
1448
1449 static int cgroup_good(Service *s) {
1450         int r;
1451
1452         assert(s);
1453
1454         if ((r = cgroup_bonding_is_empty_list(s->meta.cgroup_bondings)) < 0)
1455                 return r;
1456
1457         return !r;
1458 }
1459
1460 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1461         int r;
1462         assert(s);
1463
1464         if (!success)
1465                 s->failure = true;
1466
1467         if (allow_restart &&
1468             s->allow_restart &&
1469             (s->restart == SERVICE_RESTART_ALWAYS ||
1470              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1471
1472                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1473                         goto fail;
1474
1475                 service_set_state(s, SERVICE_AUTO_RESTART);
1476         } else
1477                 service_set_state(s, s->failure ? SERVICE_MAINTENANCE : SERVICE_DEAD);
1478
1479         return;
1480
1481 fail:
1482         log_warning("%s failed to run install restart timer: %s", s->meta.id, strerror(-r));
1483         service_enter_dead(s, false, false);
1484 }
1485
1486 static void service_enter_signal(Service *s, ServiceState state, bool success);
1487
1488 static void service_enter_stop_post(Service *s, bool success) {
1489         int r;
1490         assert(s);
1491
1492         if (!success)
1493                 s->failure = true;
1494
1495         service_unwatch_control_pid(s);
1496
1497         s->control_command_id = SERVICE_EXEC_STOP_POST;
1498         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1499                 if ((r = service_spawn(s,
1500                                        s->control_command,
1501                                        true,
1502                                        false,
1503                                        !s->permissions_start_only,
1504                                        !s->root_directory_start_only,
1505                                        false,
1506                                        &s->control_pid)) < 0)
1507                         goto fail;
1508
1509
1510                 service_set_state(s, SERVICE_STOP_POST);
1511         } else
1512                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1513
1514         return;
1515
1516 fail:
1517         log_warning("%s failed to run 'stop-post' task: %s", s->meta.id, strerror(-r));
1518         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1519 }
1520
1521 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1522         int r;
1523         bool sent = false;
1524
1525         assert(s);
1526
1527         if (!success)
1528                 s->failure = true;
1529
1530         if (s->kill_mode != KILL_NONE) {
1531                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1532
1533                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1534
1535                         if ((r = cgroup_bonding_kill_list(s->meta.cgroup_bondings, sig)) < 0) {
1536                                 if (r != -EAGAIN && r != -ESRCH)
1537                                         goto fail;
1538                         } else
1539                                 sent = true;
1540                 }
1541
1542                 if (!sent) {
1543                         r = 0;
1544
1545                         if (s->main_pid > 0) {
1546                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1547                                         r = -errno;
1548                                 else
1549                                         sent = true;
1550                         }
1551
1552                         if (s->control_pid > 0) {
1553                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1554                                         r = -errno;
1555                                 else
1556                                         sent = true;
1557                         }
1558
1559                         if (r < 0)
1560                                 goto fail;
1561                 }
1562         }
1563
1564         if (sent && (s->main_pid > 0 || s->control_pid > 0)) {
1565                 if (s->timeout_usec > 0)
1566                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1567                                 goto fail;
1568
1569                 service_set_state(s, state);
1570         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1571                 service_enter_stop_post(s, true);
1572         else
1573                 service_enter_dead(s, true, true);
1574
1575         return;
1576
1577 fail:
1578         log_warning("%s failed to kill processes: %s", s->meta.id, strerror(-r));
1579
1580         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1581                 service_enter_stop_post(s, false);
1582         else
1583                 service_enter_dead(s, false, true);
1584 }
1585
1586 static void service_enter_stop(Service *s, bool success) {
1587         int r;
1588
1589         assert(s);
1590
1591         if (!success)
1592                 s->failure = true;
1593
1594         service_unwatch_control_pid(s);
1595
1596         s->control_command_id = SERVICE_EXEC_STOP;
1597         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1598                 if ((r = service_spawn(s,
1599                                        s->control_command,
1600                                        true,
1601                                        false,
1602                                        !s->permissions_start_only,
1603                                        !s->root_directory_start_only,
1604                                        false,
1605                                        &s->control_pid)) < 0)
1606                         goto fail;
1607
1608                 service_set_state(s, SERVICE_STOP);
1609         } else
1610                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1611
1612         return;
1613
1614 fail:
1615         log_warning("%s failed to run 'stop' task: %s", s->meta.id, strerror(-r));
1616         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1617 }
1618
1619 static void service_enter_running(Service *s, bool success) {
1620         int main_pid_ok, cgroup_ok;
1621         assert(s);
1622
1623         if (!success)
1624                 s->failure = true;
1625
1626         main_pid_ok = main_pid_good(s);
1627         cgroup_ok = cgroup_good(s);
1628
1629         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
1630             (s->bus_name_good || s->type != SERVICE_DBUS))
1631                 service_set_state(s, SERVICE_RUNNING);
1632         else if (s->valid_no_process)
1633                 service_set_state(s, SERVICE_EXITED);
1634         else
1635                 service_enter_stop(s, true);
1636 }
1637
1638 static void service_enter_start_post(Service *s) {
1639         int r;
1640         assert(s);
1641
1642         service_unwatch_control_pid(s);
1643
1644         s->control_command_id = SERVICE_EXEC_START_POST;
1645         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1646                 if ((r = service_spawn(s,
1647                                        s->control_command,
1648                                        true,
1649                                        false,
1650                                        !s->permissions_start_only,
1651                                        !s->root_directory_start_only,
1652                                        false,
1653                                        &s->control_pid)) < 0)
1654                         goto fail;
1655
1656                 service_set_state(s, SERVICE_START_POST);
1657         } else
1658                 service_enter_running(s, true);
1659
1660         return;
1661
1662 fail:
1663         log_warning("%s failed to run 'start-post' task: %s", s->meta.id, strerror(-r));
1664         service_enter_stop(s, false);
1665 }
1666
1667 static void service_enter_start(Service *s) {
1668         pid_t pid;
1669         int r;
1670
1671         assert(s);
1672
1673         assert(s->exec_command[SERVICE_EXEC_START]);
1674         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1675
1676         if (s->type == SERVICE_FORKING)
1677                 service_unwatch_control_pid(s);
1678         else
1679                 service_unwatch_main_pid(s);
1680
1681         if ((r = service_spawn(s,
1682                                s->exec_command[SERVICE_EXEC_START],
1683                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1684                                true,
1685                                true,
1686                                true,
1687                                s->notify_access != NOTIFY_NONE,
1688                                &pid)) < 0)
1689                 goto fail;
1690
1691         if (s->type == SERVICE_SIMPLE) {
1692                 /* For simple services we immediately start
1693                  * the START_POST binaries. */
1694
1695                 service_set_main_pid(s, pid);
1696                 service_enter_start_post(s);
1697
1698         } else  if (s->type == SERVICE_FORKING) {
1699
1700                 /* For forking services we wait until the start
1701                  * process exited. */
1702
1703                 s->control_command_id = SERVICE_EXEC_START;
1704                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1705
1706                 s->control_pid = pid;
1707                 service_set_state(s, SERVICE_START);
1708
1709         } else if (s->type == SERVICE_FINISH ||
1710                    s->type == SERVICE_DBUS ||
1711                    s->type == SERVICE_NOTIFY) {
1712
1713                 /* For finishing services we wait until the start
1714                  * process exited, too, but it is our main process. */
1715
1716                 /* For D-Bus services we know the main pid right away,
1717                  * but wait for the bus name to appear on the
1718                  * bus. Notify services are similar. */
1719
1720                 service_set_main_pid(s, pid);
1721                 service_set_state(s, SERVICE_START);
1722         } else
1723                 assert_not_reached("Unknown service type");
1724
1725         return;
1726
1727 fail:
1728         log_warning("%s failed to run 'start' task: %s", s->meta.id, strerror(-r));
1729         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1730 }
1731
1732 static void service_enter_start_pre(Service *s) {
1733         int r;
1734
1735         assert(s);
1736
1737         service_unwatch_control_pid(s);
1738
1739         s->control_command_id = SERVICE_EXEC_START_PRE;
1740         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1741                 if ((r = service_spawn(s,
1742                                        s->control_command,
1743                                        true,
1744                                        false,
1745                                        !s->permissions_start_only,
1746                                        !s->root_directory_start_only,
1747                                        false,
1748                                        &s->control_pid)) < 0)
1749                         goto fail;
1750
1751                 service_set_state(s, SERVICE_START_PRE);
1752         } else
1753                 service_enter_start(s);
1754
1755         return;
1756
1757 fail:
1758         log_warning("%s failed to run 'start-pre' task: %s", s->meta.id, strerror(-r));
1759         service_enter_dead(s, false, true);
1760 }
1761
1762 static void service_enter_restart(Service *s) {
1763         int r;
1764         assert(s);
1765
1766         service_enter_dead(s, true, false);
1767
1768         if ((r = manager_add_job(s->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1769                 goto fail;
1770
1771         log_debug("%s scheduled restart job.", s->meta.id);
1772         return;
1773
1774 fail:
1775
1776         log_warning("%s failed to schedule restart job: %s", s->meta.id, strerror(-r));
1777         service_enter_dead(s, false, false);
1778 }
1779
1780 static void service_enter_reload(Service *s) {
1781         int r;
1782
1783         assert(s);
1784
1785         service_unwatch_control_pid(s);
1786
1787         s->control_command_id = SERVICE_EXEC_RELOAD;
1788         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1789                 if ((r = service_spawn(s,
1790                                        s->control_command,
1791                                        true,
1792                                        false,
1793                                        !s->permissions_start_only,
1794                                        !s->root_directory_start_only,
1795                                        false,
1796                                        &s->control_pid)) < 0)
1797                         goto fail;
1798
1799                 service_set_state(s, SERVICE_RELOAD);
1800         } else
1801                 service_enter_running(s, true);
1802
1803         return;
1804
1805 fail:
1806         log_warning("%s failed to run 'reload' task: %s", s->meta.id, strerror(-r));
1807         service_enter_stop(s, false);
1808 }
1809
1810 static void service_run_next(Service *s, bool success) {
1811         int r;
1812
1813         assert(s);
1814         assert(s->control_command);
1815         assert(s->control_command->command_next);
1816
1817         if (!success)
1818                 s->failure = true;
1819
1820         s->control_command = s->control_command->command_next;
1821
1822         service_unwatch_control_pid(s);
1823
1824         if ((r = service_spawn(s,
1825                                s->control_command,
1826                                true,
1827                                false,
1828                                !s->permissions_start_only,
1829                                !s->root_directory_start_only,
1830                                false,
1831                                &s->control_pid)) < 0)
1832                 goto fail;
1833
1834         return;
1835
1836 fail:
1837         log_warning("%s failed to run next task: %s", s->meta.id, strerror(-r));
1838
1839         if (s->state == SERVICE_START_PRE)
1840                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1841         else if (s->state == SERVICE_STOP)
1842                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1843         else if (s->state == SERVICE_STOP_POST)
1844                 service_enter_dead(s, false, true);
1845         else
1846                 service_enter_stop(s, false);
1847 }
1848
1849 static int service_start(Unit *u) {
1850         Service *s = SERVICE(u);
1851
1852         assert(s);
1853
1854         /* We cannot fulfill this request right now, try again later
1855          * please! */
1856         if (s->state == SERVICE_STOP ||
1857             s->state == SERVICE_STOP_SIGTERM ||
1858             s->state == SERVICE_STOP_SIGKILL ||
1859             s->state == SERVICE_STOP_POST ||
1860             s->state == SERVICE_FINAL_SIGTERM ||
1861             s->state == SERVICE_FINAL_SIGKILL)
1862                 return -EAGAIN;
1863
1864         /* Already on it! */
1865         if (s->state == SERVICE_START_PRE ||
1866             s->state == SERVICE_START ||
1867             s->state == SERVICE_START_POST)
1868                 return 0;
1869
1870         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTENANCE || s->state == SERVICE_AUTO_RESTART);
1871
1872         /* Make sure we don't enter a busy loop of some kind. */
1873         if (!ratelimit_test(&s->ratelimit)) {
1874                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1875                 return -ECANCELED;
1876         }
1877
1878         s->failure = false;
1879         s->main_pid_known = false;
1880         s->allow_restart = true;
1881
1882         service_enter_start_pre(s);
1883         return 0;
1884 }
1885
1886 static int service_stop(Unit *u) {
1887         Service *s = SERVICE(u);
1888
1889         assert(s);
1890
1891         /* Cannot do this now */
1892         if (s->state == SERVICE_START_PRE ||
1893             s->state == SERVICE_START ||
1894             s->state == SERVICE_START_POST ||
1895             s->state == SERVICE_RELOAD)
1896                 return -EAGAIN;
1897
1898         /* Already on it */
1899         if (s->state == SERVICE_STOP ||
1900             s->state == SERVICE_STOP_SIGTERM ||
1901             s->state == SERVICE_STOP_SIGKILL ||
1902             s->state == SERVICE_STOP_POST ||
1903             s->state == SERVICE_FINAL_SIGTERM ||
1904             s->state == SERVICE_FINAL_SIGKILL)
1905                 return 0;
1906
1907         if (s->state == SERVICE_AUTO_RESTART) {
1908                 service_set_state(s, SERVICE_DEAD);
1909                 return 0;
1910         }
1911
1912         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1913
1914         /* This is a user request, so don't do restarts on this
1915          * shutdown. */
1916         s->allow_restart = false;
1917
1918         service_enter_stop(s, true);
1919         return 0;
1920 }
1921
1922 static int service_reload(Unit *u) {
1923         Service *s = SERVICE(u);
1924
1925         assert(s);
1926
1927         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1928
1929         service_enter_reload(s);
1930         return 0;
1931 }
1932
1933 static bool service_can_reload(Unit *u) {
1934         Service *s = SERVICE(u);
1935
1936         assert(s);
1937
1938         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1939 }
1940
1941 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1942         Service *s = SERVICE(u);
1943
1944         assert(u);
1945         assert(f);
1946         assert(fds);
1947
1948         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1949         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1950
1951         if (s->control_pid > 0)
1952                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1953
1954         if (s->main_pid_known && s->main_pid > 0)
1955                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
1956
1957         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1958
1959         /* There's a minor uncleanliness here: if there are multiple
1960          * commands attached here, we will start from the first one
1961          * again */
1962         if (s->control_command_id >= 0)
1963                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
1964
1965         if (s->socket_fd >= 0) {
1966                 int copy;
1967
1968                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1969                         return copy;
1970
1971                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1972         }
1973
1974         return 0;
1975 }
1976
1977 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1978         Service *s = SERVICE(u);
1979         int r;
1980
1981         assert(u);
1982         assert(key);
1983         assert(value);
1984         assert(fds);
1985
1986         if (streq(key, "state")) {
1987                 ServiceState state;
1988
1989                 if ((state = service_state_from_string(value)) < 0)
1990                         log_debug("Failed to parse state value %s", value);
1991                 else
1992                         s->deserialized_state = state;
1993         } else if (streq(key, "failure")) {
1994                 int b;
1995
1996                 if ((b = parse_boolean(value)) < 0)
1997                         log_debug("Failed to parse failure value %s", value);
1998                 else
1999                         s->failure = b || s->failure;
2000         } else if (streq(key, "control-pid")) {
2001                 pid_t pid;
2002
2003                 if ((r = parse_pid(value, &pid)) < 0)
2004                         log_debug("Failed to parse control-pid value %s", value);
2005                 else
2006                         s->control_pid = pid;
2007         } else if (streq(key, "main-pid")) {
2008                 pid_t pid;
2009
2010                 if ((r = parse_pid(value, &pid)) < 0)
2011                         log_debug("Failed to parse main-pid value %s", value);
2012                 else
2013                         service_set_main_pid(s, (pid_t) pid);
2014         } else if (streq(key, "main-pid-known")) {
2015                 int b;
2016
2017                 if ((b = parse_boolean(value)) < 0)
2018                         log_debug("Failed to parse main-pid-known value %s", value);
2019                 else
2020                         s->main_pid_known = b;
2021         } else if (streq(key, "control-command")) {
2022                 ServiceExecCommand id;
2023
2024                 if ((id = service_exec_command_from_string(value)) < 0)
2025                         log_debug("Failed to parse exec-command value %s", value);
2026                 else {
2027                         s->control_command_id = id;
2028                         s->control_command = s->exec_command[id];
2029                 }
2030         } else if (streq(key, "socket-fd")) {
2031                 int fd;
2032
2033                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2034                         log_debug("Failed to parse socket-fd value %s", value);
2035                 else {
2036
2037                         if (s->socket_fd >= 0)
2038                                 close_nointr_nofail(s->socket_fd);
2039                         s->socket_fd = fdset_remove(fds, fd);
2040                 }
2041         } else
2042                 log_debug("Unknown serialization key '%s'", key);
2043
2044         return 0;
2045 }
2046
2047 static UnitActiveState service_active_state(Unit *u) {
2048         assert(u);
2049
2050         return state_translation_table[SERVICE(u)->state];
2051 }
2052
2053 static const char *service_sub_state_to_string(Unit *u) {
2054         assert(u);
2055
2056         return service_state_to_string(SERVICE(u)->state);
2057 }
2058
2059 static bool service_check_gc(Unit *u) {
2060         Service *s = SERVICE(u);
2061
2062         assert(s);
2063
2064         return !!s->sysv_path;
2065 }
2066
2067 static bool service_check_snapshot(Unit *u) {
2068         Service *s = SERVICE(u);
2069
2070         assert(s);
2071
2072         return !s->got_socket_fd;
2073 }
2074
2075 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2076         Service *s = SERVICE(u);
2077         bool success;
2078
2079         assert(s);
2080         assert(pid >= 0);
2081
2082         success = is_clean_exit(code, status);
2083         s->failure = s->failure || !success;
2084
2085         if (s->main_pid == pid) {
2086
2087                 exec_status_exit(&s->main_exec_status, pid, code, status);
2088                 s->main_pid = 0;
2089
2090                 if (s->type != SERVICE_FORKING) {
2091                         assert(s->exec_command[SERVICE_EXEC_START]);
2092                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
2093                 }
2094
2095                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
2096
2097                 /* The service exited, so the service is officially
2098                  * gone. */
2099
2100                 switch (s->state) {
2101
2102                 case SERVICE_START_POST:
2103                 case SERVICE_RELOAD:
2104                 case SERVICE_STOP:
2105                         /* Need to wait until the operation is
2106                          * done */
2107                         break;
2108
2109                 case SERVICE_START:
2110                         if (s->type == SERVICE_FINISH) {
2111                                 /* This was our main goal, so let's go on */
2112                                 if (success)
2113                                         service_enter_start_post(s);
2114                                 else
2115                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2116                                 break;
2117                         } else {
2118                                 assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2119
2120                                 /* Fall through */
2121                         }
2122
2123                 case SERVICE_RUNNING:
2124                         service_enter_running(s, success);
2125                         break;
2126
2127                 case SERVICE_STOP_SIGTERM:
2128                 case SERVICE_STOP_SIGKILL:
2129
2130                         if (!control_pid_good(s))
2131                                 service_enter_stop_post(s, success);
2132
2133                         /* If there is still a control process, wait for that first */
2134                         break;
2135
2136                 default:
2137                         assert_not_reached("Uh, main process died at wrong time.");
2138                 }
2139
2140         } else if (s->control_pid == pid) {
2141
2142                 if (s->control_command)
2143                         exec_status_exit(&s->control_command->exec_status, pid, code, status);
2144
2145                 s->control_pid = 0;
2146
2147                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2148
2149                 /* If we are shutting things down anyway we
2150                  * don't care about failing commands. */
2151
2152                 if (s->control_command && s->control_command->command_next && success) {
2153
2154                         /* There is another command to *
2155                          * execute, so let's do that. */
2156
2157                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
2158                         service_run_next(s, success);
2159
2160                 } else {
2161                         /* No further commands for this step, so let's
2162                          * figure out what to do next */
2163
2164                         s->control_command = NULL;
2165                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2166
2167                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2168
2169                         switch (s->state) {
2170
2171                         case SERVICE_START_PRE:
2172                                 if (success)
2173                                         service_enter_start(s);
2174                                 else
2175                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2176                                 break;
2177
2178                         case SERVICE_START:
2179                                 assert(s->type == SERVICE_FORKING);
2180
2181                                 /* Let's try to load the pid
2182                                  * file here if we can. We
2183                                  * ignore the return value,
2184                                  * since the PID file might
2185                                  * actually be created by a
2186                                  * START_POST script */
2187
2188                                 if (success) {
2189                                         if (s->pid_file)
2190                                                 service_load_pid_file(s);
2191
2192                                         service_enter_start_post(s);
2193                                 } else
2194                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2195
2196                                 break;
2197
2198                         case SERVICE_START_POST:
2199                                 if (success && s->pid_file && !s->main_pid_known) {
2200                                         int r;
2201
2202                                         /* Hmm, let's see if we can
2203                                          * load the pid now after the
2204                                          * start-post scripts got
2205                                          * executed. */
2206
2207                                         if ((r = service_load_pid_file(s)) < 0)
2208                                                 log_warning("%s: failed to load PID file %s: %s", s->meta.id, s->pid_file, strerror(-r));
2209                                 }
2210
2211                                 /* Fall through */
2212
2213                         case SERVICE_RELOAD:
2214                                 if (success)
2215                                         service_enter_running(s, true);
2216                                 else
2217                                         service_enter_stop(s, false);
2218
2219                                 break;
2220
2221                         case SERVICE_STOP:
2222                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2223                                 break;
2224
2225                         case SERVICE_STOP_SIGTERM:
2226                         case SERVICE_STOP_SIGKILL:
2227                                 if (main_pid_good(s) <= 0)
2228                                         service_enter_stop_post(s, success);
2229
2230                                 /* If there is still a service
2231                                  * process around, wait until
2232                                  * that one quit, too */
2233                                 break;
2234
2235                         case SERVICE_STOP_POST:
2236                         case SERVICE_FINAL_SIGTERM:
2237                         case SERVICE_FINAL_SIGKILL:
2238                                 service_enter_dead(s, success, true);
2239                                 break;
2240
2241                         default:
2242                                 assert_not_reached("Uh, control process died at wrong time.");
2243                         }
2244                 }
2245         }
2246 }
2247
2248 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2249         Service *s = SERVICE(u);
2250
2251         assert(s);
2252         assert(elapsed == 1);
2253
2254         assert(w == &s->timer_watch);
2255
2256         switch (s->state) {
2257
2258         case SERVICE_START_PRE:
2259         case SERVICE_START:
2260                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2261                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2262                 break;
2263
2264         case SERVICE_START_POST:
2265         case SERVICE_RELOAD:
2266                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2267                 service_enter_stop(s, false);
2268                 break;
2269
2270         case SERVICE_STOP:
2271                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2272                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2273                 break;
2274
2275         case SERVICE_STOP_SIGTERM:
2276                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2277                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2278                 break;
2279
2280         case SERVICE_STOP_SIGKILL:
2281                 /* Uh, wie sent a SIGKILL and it is still not gone?
2282                  * Must be something we cannot kill, so let's just be
2283                  * weirded out and continue */
2284
2285                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2286                 service_enter_stop_post(s, false);
2287                 break;
2288
2289         case SERVICE_STOP_POST:
2290                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2291                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2292                 break;
2293
2294         case SERVICE_FINAL_SIGTERM:
2295                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2296                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2297                 break;
2298
2299         case SERVICE_FINAL_SIGKILL:
2300                 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
2301                 service_enter_dead(s, false, true);
2302                 break;
2303
2304         case SERVICE_AUTO_RESTART:
2305                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2306                 service_enter_restart(s);
2307                 break;
2308
2309         default:
2310                 assert_not_reached("Timeout at wrong time.");
2311         }
2312 }
2313
2314 static void service_cgroup_notify_event(Unit *u) {
2315         Service *s = SERVICE(u);
2316
2317         assert(u);
2318
2319         log_debug("%s: cgroup is empty", u->meta.id);
2320
2321         switch (s->state) {
2322
2323                 /* Waiting for SIGCHLD is usually more interesting,
2324                  * because it includes return codes/signals. Which is
2325                  * why we ignore the cgroup events for most cases,
2326                  * except when we don't know pid which to expect the
2327                  * SIGCHLD for. */
2328
2329         case SERVICE_RUNNING:
2330                 service_enter_running(s, true);
2331                 break;
2332
2333         default:
2334                 ;
2335         }
2336 }
2337
2338 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
2339         Service *s = SERVICE(u);
2340         const char *e;
2341
2342         assert(u);
2343
2344         if (s->notify_access == NOTIFY_NONE) {
2345                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
2346                             u->meta.id, (unsigned long) pid);
2347                 return;
2348         }
2349
2350         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
2351                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
2352                             u->meta.id, (unsigned long) pid, (unsigned long) s->main_pid);
2353                 return;
2354         }
2355
2356         log_debug("%s: Got message", u->meta.id);
2357
2358         /* Interpret MAINPID= */
2359         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2360             (s->state == SERVICE_START ||
2361              s->state == SERVICE_START_POST ||
2362              s->state == SERVICE_RUNNING ||
2363              s->state == SERVICE_RELOAD)) {
2364
2365                 if (parse_pid(e + 8, &pid) < 0)
2366                         log_warning("Failed to parse %s", e);
2367                 else {
2368                         log_debug("%s: got %s", u->meta.id, e);
2369                         service_set_main_pid(s, pid);
2370                 }
2371         }
2372
2373         /* Interpret READY= */
2374         if (s->type == SERVICE_NOTIFY &&
2375             s->state == SERVICE_START &&
2376             strv_find(tags, "READY=1")) {
2377                 log_debug("%s: got READY=1", u->meta.id);
2378
2379                 service_enter_start_post(s);
2380         }
2381
2382         /* Interpret STATUS= */
2383         if ((e = strv_find_prefix(tags, "STATUS="))) {
2384                 char *t;
2385
2386                 if (!(t = strdup(e+7))) {
2387                         log_error("Failed to allocate string.");
2388                         return;
2389                 }
2390
2391                 log_debug("%s: got %s", u->meta.id, e);
2392
2393                 free(s->status_text);
2394                 s->status_text = t;
2395         }
2396 }
2397
2398 static int service_enumerate(Manager *m) {
2399         char **p;
2400         unsigned i;
2401         DIR *d = NULL;
2402         char *path = NULL, *fpath = NULL, *name = NULL;
2403         int r;
2404
2405         assert(m);
2406
2407         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2408                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2409                         struct dirent *de;
2410
2411                         free(path);
2412                         path = NULL;
2413                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2414                                 r = -ENOMEM;
2415                                 goto finish;
2416                         }
2417
2418                         if (d)
2419                                 closedir(d);
2420
2421                         if (!(d = opendir(path))) {
2422                                 if (errno != ENOENT)
2423                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2424
2425                                 continue;
2426                         }
2427
2428                         while ((de = readdir(d))) {
2429                                 Unit *service;
2430                                 int a, b;
2431
2432                                 if (ignore_file(de->d_name))
2433                                         continue;
2434
2435                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2436                                         continue;
2437
2438                                 if (strlen(de->d_name) < 4)
2439                                         continue;
2440
2441                                 a = undecchar(de->d_name[1]);
2442                                 b = undecchar(de->d_name[2]);
2443
2444                                 if (a < 0 || b < 0)
2445                                         continue;
2446
2447                                 free(fpath);
2448                                 fpath = NULL;
2449                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2450                                         r = -ENOMEM;
2451                                         goto finish;
2452                                 }
2453
2454                                 if (access(fpath, X_OK) < 0) {
2455
2456                                         if (errno != ENOENT)
2457                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2458
2459                                         continue;
2460                                 }
2461
2462                                 free(name);
2463                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2464                                         r = -ENOMEM;
2465                                         goto finish;
2466                                 }
2467
2468                                 if ((r = manager_load_unit_prepare(m, name, NULL, &service)) < 0) {
2469                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2470                                         continue;
2471                                 }
2472
2473                                 if (de->d_name[0] == 'S' &&
2474                                     (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT))
2475                                         SERVICE(service)->sysv_start_priority =
2476                                                 MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2477
2478                                 manager_dispatch_load_queue(m);
2479                                 service = unit_follow_merge(service);
2480
2481                                 if (de->d_name[0] == 'S') {
2482
2483                                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
2484                                                 goto finish;
2485
2486                                 } else if (de->d_name[0] == 'K' &&
2487                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2488                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2489
2490                                         /* We honour K links only for
2491                                          * halt/reboot. For the normal
2492                                          * runlevels we assume the
2493                                          * stop jobs will be
2494                                          * implicitly added by the
2495                                          * core logic. Also, we don't
2496                                          * really distuingish here
2497                                          * between the runlevels 0 and
2498                                          * 6 and just add them to the
2499                                          * special shutdown target. On
2500                                          * SUSE the boot.d/ runlevel
2501                                          * is also used for shutdown,
2502                                          * so we add links for that
2503                                          * too to the shutdown
2504                                          * target.*/
2505
2506                                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
2507                                                 goto finish;
2508                                 }
2509                         }
2510                 }
2511
2512         r = 0;
2513
2514 finish:
2515         free(path);
2516         free(fpath);
2517         free(name);
2518
2519         if (d)
2520                 closedir(d);
2521
2522         return r;
2523 }
2524
2525 static void service_bus_name_owner_change(
2526                 Unit *u,
2527                 const char *name,
2528                 const char *old_owner,
2529                 const char *new_owner) {
2530
2531         Service *s = SERVICE(u);
2532
2533         assert(s);
2534         assert(name);
2535
2536         assert(streq(s->bus_name, name));
2537         assert(old_owner || new_owner);
2538
2539         if (old_owner && new_owner)
2540                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2541         else if (old_owner)
2542                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2543         else
2544                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2545
2546         s->bus_name_good = !!new_owner;
2547
2548         if (s->type == SERVICE_DBUS) {
2549
2550                 /* service_enter_running() will figure out what to
2551                  * do */
2552                 if (s->state == SERVICE_RUNNING)
2553                         service_enter_running(s, true);
2554                 else if (s->state == SERVICE_START && new_owner)
2555                         service_enter_start_post(s);
2556
2557         } else if (new_owner &&
2558                    s->main_pid <= 0 &&
2559                    (s->state == SERVICE_START ||
2560                     s->state == SERVICE_START_POST ||
2561                     s->state == SERVICE_RUNNING ||
2562                     s->state == SERVICE_RELOAD)) {
2563
2564                 /* Try to acquire PID from bus service */
2565                 log_debug("Trying to acquire PID from D-Bus name...");
2566
2567                 bus_query_pid(u->meta.manager, name);
2568         }
2569 }
2570
2571 static void service_bus_query_pid_done(
2572                 Unit *u,
2573                 const char *name,
2574                 pid_t pid) {
2575
2576         Service *s = SERVICE(u);
2577
2578         assert(s);
2579         assert(name);
2580
2581         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2582
2583         if (s->main_pid <= 0 &&
2584             (s->state == SERVICE_START ||
2585              s->state == SERVICE_START_POST ||
2586              s->state == SERVICE_RUNNING ||
2587              s->state == SERVICE_RELOAD))
2588                 service_set_main_pid(s, pid);
2589 }
2590
2591 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
2592         assert(s);
2593         assert(fd >= 0);
2594
2595         /* This is called by the socket code when instantiating a new
2596          * service for a stream socket and the socket needs to be
2597          * configured. */
2598
2599         if (s->meta.load_state != UNIT_LOADED)
2600                 return -EINVAL;
2601
2602         if (s->socket_fd >= 0)
2603                 return -EBUSY;
2604
2605         if (s->state != SERVICE_DEAD)
2606                 return -EAGAIN;
2607
2608         s->socket_fd = fd;
2609         s->got_socket_fd = true;
2610         s->socket = sock;
2611
2612         return 0;
2613 }
2614
2615 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2616         [SERVICE_DEAD] = "dead",
2617         [SERVICE_START_PRE] = "start-pre",
2618         [SERVICE_START] = "start",
2619         [SERVICE_START_POST] = "start-post",
2620         [SERVICE_RUNNING] = "running",
2621         [SERVICE_EXITED] = "exited",
2622         [SERVICE_RELOAD] = "reload",
2623         [SERVICE_STOP] = "stop",
2624         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2625         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2626         [SERVICE_STOP_POST] = "stop-post",
2627         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2628         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2629         [SERVICE_MAINTENANCE] = "maintenance",
2630         [SERVICE_AUTO_RESTART] = "auto-restart",
2631 };
2632
2633 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2634
2635 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2636         [SERVICE_ONCE] = "once",
2637         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2638         [SERVICE_RESTART_ALWAYS] = "restart-always",
2639 };
2640
2641 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2642
2643 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2644         [SERVICE_SIMPLE] = "simple",
2645         [SERVICE_FORKING] = "forking",
2646         [SERVICE_FINISH] = "finish",
2647         [SERVICE_DBUS] = "dbus",
2648         [SERVICE_NOTIFY] = "notify"
2649 };
2650
2651 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2652
2653 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2654         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2655         [SERVICE_EXEC_START] = "ExecStart",
2656         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2657         [SERVICE_EXEC_RELOAD] = "ExecReload",
2658         [SERVICE_EXEC_STOP] = "ExecStop",
2659         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2660 };
2661
2662 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2663
2664 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
2665         [NOTIFY_NONE] = "none",
2666         [NOTIFY_MAIN] = "main",
2667         [NOTIFY_ALL] = "all"
2668 };
2669
2670 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
2671
2672 const UnitVTable service_vtable = {
2673         .suffix = ".service",
2674         .show_status = true,
2675
2676         .init = service_init,
2677         .done = service_done,
2678         .load = service_load,
2679
2680         .coldplug = service_coldplug,
2681
2682         .dump = service_dump,
2683
2684         .start = service_start,
2685         .stop = service_stop,
2686         .reload = service_reload,
2687
2688         .can_reload = service_can_reload,
2689
2690         .serialize = service_serialize,
2691         .deserialize_item = service_deserialize_item,
2692
2693         .active_state = service_active_state,
2694         .sub_state_to_string = service_sub_state_to_string,
2695
2696         .check_gc = service_check_gc,
2697         .check_snapshot = service_check_snapshot,
2698
2699         .sigchld_event = service_sigchld_event,
2700         .timer_event = service_timer_event,
2701
2702         .cgroup_notify_empty = service_cgroup_notify_event,
2703         .notify_message = service_notify_message,
2704
2705         .bus_name_owner_change = service_bus_name_owner_change,
2706         .bus_query_pid_done = service_bus_query_pid_done,
2707
2708         .bus_message_handler = bus_service_message_handler,
2709
2710         .enumerate = service_enumerate
2711 };