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