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
  34 #define COMMENTS "#;\n"
  35 #define NEWLINES "\n\r"
  36 #define LINE_MAX 4096
  37
  38 static const char * const rcnd_table[] = {
  39         "/rc0.d",  SPECIAL_RUNLEVEL0_TARGET,
  40         "/rc1.d",  SPECIAL_RUNLEVEL1_TARGET,
  41         "/rc2.d",  SPECIAL_RUNLEVEL2_TARGET,
  42         "/rc3.d",  SPECIAL_RUNLEVEL3_TARGET,
  43         "/rc4.d",  SPECIAL_RUNLEVEL4_TARGET,
  44         "/rc5.d",  SPECIAL_RUNLEVEL5_TARGET,
  45         "/rc6.d",  SPECIAL_RUNLEVEL6_TARGET,
  46         "/boot.d", SPECIAL_BASIC_TARGET
  47 };
  48
  49 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  50         [SERVICE_DEAD] = UNIT_INACTIVE,
  51         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  52         [SERVICE_START] = UNIT_ACTIVATING,
  53         [SERVICE_START_POST] = UNIT_ACTIVATING,
  54         [SERVICE_RUNNING] = UNIT_ACTIVE,
  55         [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
  56         [SERVICE_STOP] = UNIT_DEACTIVATING,
  57         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  58         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  59         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  60         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  61         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  62         [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
  63         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
  64 };
  65
  66 static void service_done(Unit *u) {
  67         Service *s = SERVICE(u);
  68
  69         assert(s);
  70
  71         free(s->pid_file);
  72         s->pid_file = NULL;
  73
  74         free(s->sysv_path);
  75         s->sysv_path = NULL;
  76
  77         free(s->sysv_runlevels);
  78         s->sysv_runlevels = NULL;
  79
  80         exec_context_done(&s->exec_context);
  81         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
  82         s->control_command = NULL;
  83
  84         /* This will leak a process, but at least no memory or any of
  85          * our resources */
  86         if (s->main_pid > 0) {
  87                 unit_unwatch_pid(u, s->main_pid);
  88                 s->main_pid = 0;
  89         }
  90
  91         if (s->control_pid > 0) {
  92                 unit_unwatch_pid(u, s->control_pid);
  93                 s->control_pid = 0;
  94         }
  95
  96         unit_unwatch_timer(u, &s->timer_watch);
  97 }
  98
  99 static int sysv_translate_name(const char *name, char **_r) {
 100
 101         static const char * const table[] = {
 102                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 103                 "$network",   SPECIAL_NETWORK_TARGET,
 104                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 105                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 106                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 107                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 108                 "$time",      SPECIAL_RTC_SET_TARGET
 109         };
 110
 111         unsigned i;
 112         char *r;
 113
 114         for (i = 0; i < ELEMENTSOF(table); i += 2)
 115                 if (streq(table[i], name)) {
 116                         if (!(r = strdup(table[i+1])))
 117                                 return -ENOMEM;
 118
 119                         goto finish;
 120                 }
 121
 122         if (*name == '$')
 123                 return 0;
 124
 125         if (asprintf(&r, "%s.service", name) < 0)
 126                 return -ENOMEM;
 127
 128 finish:
 129
 130         if (_r)
 131                 *_r = r;
 132
 133         return 1;
 134 }
 135
 136 static int sysv_chkconfig_order(Service *s) {
 137         Meta *other;
 138         int r;
 139
 140         assert(s);
 141
 142         if (s->sysv_start_priority < 0)
 143                 return 0;
 144
 145         /* For each pair of services where at least one lacks a LSB
 146          * header, we use the start priority value to order things. */
 147
 148         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 149                 Service *t;
 150                 UnitDependency d;
 151
 152                 t = (Service*) other;
 153
 154                 if (s == t)
 155                         continue;
 156
 157                 if (t->sysv_start_priority < 0)
 158                         continue;
 159
 160                 /* If both units have modern headers we don't care
 161                  * about the priorities */
 162                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 163                     (!t->sysv_path || t->sysv_has_lsb))
 164                         continue;
 165
 166                 if (t->sysv_start_priority < s->sysv_start_priority)
 167                         d = UNIT_AFTER;
 168                 else if (t->sysv_start_priority > s->sysv_start_priority)
 169                         d = UNIT_BEFORE;
 170                 else
 171                         continue;
 172
 173                 /* FIXME: Maybe we should compare the name here lexicographically? */
 174
 175                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
 176                         return r;
 177         }
 178
 179         return 0;
 180 }
 181
 182 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 183         ExecCommand *c;
 184
 185         if (!(c = new0(ExecCommand, 1)))
 186                 return NULL;
 187
 188         if (!(c->path = strdup(path))) {
 189                 free(c);
 190                 return NULL;
 191         }
 192
 193         if (!(c->argv = strv_new(path, arg1, NULL))) {
 194                 free(c->path);
 195                 free(c);
 196                 return NULL;
 197         }
 198
 199         return c;
 200 }
 201
 202 static int sysv_exec_commands(Service *s) {
 203         ExecCommand *c;
 204
 205         assert(s);
 206         assert(s->sysv_path);
 207
 208         if (!(c = exec_command_new(s->sysv_path, "start")))
 209                 return -ENOMEM;
 210         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 211
 212         if (!(c = exec_command_new(s->sysv_path, "stop")))
 213                 return -ENOMEM;
 214         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 215
 216         if (!(c = exec_command_new(s->sysv_path, "reload")))
 217                 return -ENOMEM;
 218         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 219
 220         return 0;
 221 }
 222
 223 static int priority_from_rcd(Service *s, const char *init_script) {
 224         char **p;
 225         unsigned i;
 226
 227         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
 228                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
 229                         char *path;
 230                         DIR *d;
 231                         struct dirent *de;
 232
 233                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
 234                                 return -ENOMEM;
 235
 236                         d = opendir(path);
 237                         free(path);
 238
 239                         if (!d) {
 240                                 if (errno != ENOENT)
 241                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
 242
 243                                 continue;
 244                         }
 245
 246                         while ((de = readdir(d))) {
 247                                 int a, b;
 248
 249                                 if (ignore_file(de->d_name))
 250                                         continue;
 251
 252                                 if (de->d_name[0] != 'S')
 253                                         continue;
 254
 255                                 if (strlen(de->d_name) < 4)
 256                                         continue;
 257
 258                                 if (!streq(de->d_name + 3, init_script))
 259                                         continue;
 260
 261                                 /* Yay, we found it! Now decode the priority */
 262
 263                                 a = undecchar(de->d_name[1]);
 264                                 b = undecchar(de->d_name[2]);
 265
 266                                 if (a < 0 || b < 0)
 267                                         continue;
 268
 269                                 s->sysv_start_priority = a*10 + b;
 270
 271                                 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
 272
 273                                 closedir(d);
 274                                 return 0;
 275                         }
 276
 277                         closedir(d);
 278                 }
 279
 280         return 0;
 281 }
 282
 283 static int service_load_sysv_path(Service *s, const char *path) {
 284         FILE *f;
 285         Unit *u;
 286         unsigned line = 0;
 287         int r;
 288         enum {
 289                 NORMAL,
 290                 DESCRIPTION,
 291                 LSB,
 292                 LSB_DESCRIPTION
 293         } state = NORMAL;
 294
 295         assert(s);
 296         assert(path);
 297
 298         u = UNIT(s);
 299
 300         if (!(f = fopen(path, "re"))) {
 301                 r = errno == ENOENT ? 0 : -errno;
 302                 goto finish;
 303         }
 304
 305         s->type = SERVICE_FORKING;
 306         s->restart = SERVICE_ONCE;
 307
 308         free(s->sysv_path);
 309         if (!(s->sysv_path = strdup(path))) {
 310                 r = -ENOMEM;
 311                 goto finish;
 312         }
 313
 314         while (!feof(f)) {
 315                 char l[LINE_MAX], *t;
 316
 317                 if (!fgets(l, sizeof(l), f)) {
 318                         if (feof(f))
 319                                 break;
 320
 321                         r = -errno;
 322                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 323                         goto finish;
 324                 }
 325
 326                 line++;
 327
 328                 t = strstrip(l);
 329                 if (*t != '#')
 330                         continue;
 331
 332                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 333                         state = LSB;
 334                         s->sysv_has_lsb = true;
 335                         continue;
 336                 }
 337
 338                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 339                         state = NORMAL;
 340                         continue;
 341                 }
 342
 343                 t++;
 344                 t += strspn(t, WHITESPACE);
 345
 346                 if (state == NORMAL) {
 347
 348                         /* Try to parse Red Hat style chkconfig headers */
 349
 350                         if (startswith(t, "chkconfig:")) {
 351                                 int start_priority;
 352                                 char runlevels[16], *k;
 353
 354                                 state = NORMAL;
 355
 356                                 if (sscanf(t+10, "%15s %i %*i",
 357                                            runlevels,
 358                                            &start_priority) != 2) {
 359
 360                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 361                                         continue;
 362                                 }
 363
 364                                 if (start_priority < 0 || start_priority > 99)
 365                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 366                                 else
 367                                         s->sysv_start_priority = start_priority;
 368
 369                                 char_array_0(runlevels);
 370                                 k = delete_chars(runlevels, WHITESPACE "-");
 371
 372                                 if (k[0]) {
 373                                         char *d;
 374
 375                                         if (!(d = strdup(k))) {
 376                                                 r = -ENOMEM;
 377                                                 goto finish;
 378                                         }
 379
 380                                         free(s->sysv_runlevels);
 381                                         s->sysv_runlevels = d;
 382                                 }
 383
 384
 385                         } else if (startswith(t, "description:")) {
 386
 387                                 size_t k = strlen(t);
 388                                 char *d;
 389
 390                                 if (t[k-1] == '\\') {
 391                                         state = DESCRIPTION;
 392                                         t[k-1] = 0;
 393                                 }
 394
 395                                 if (!(d = strdup(strstrip(t+12)))) {
 396                                         r = -ENOMEM;
 397                                         goto finish;
 398                                 }
 399
 400                                 free(u->meta.description);
 401                                 u->meta.description = d;
 402
 403                         } else if (startswith(t, "pidfile:")) {
 404
 405                                 char *fn;
 406
 407                                 state = NORMAL;
 408
 409                                 fn = strstrip(t+8);
 410                                 if (!path_is_absolute(fn)) {
 411                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 412                                         continue;
 413                                 }
 414
 415                                 if (!(fn = strdup(fn))) {
 416                                         r = -ENOMEM;
 417                                         goto finish;
 418                                 }
 419
 420                                 free(s->pid_file);
 421                                 s->pid_file = fn;
 422                         }
 423
 424                 } else if (state == DESCRIPTION) {
 425
 426                         /* Try to parse Red Hat style description
 427                          * continuation */
 428
 429                         size_t k = strlen(t);
 430                         char *d;
 431
 432                         if (t[k-1] == '\\')
 433                                 t[k-1] = 0;
 434                         else
 435                                 state = NORMAL;
 436
 437                         assert(u->meta.description);
 438                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 439                                 r = -ENOMEM;
 440                                 goto finish;
 441                         }
 442
 443                         free(u->meta.description);
 444                         u->meta.description = d;
 445
 446                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 447
 448                         if (startswith(t, "Provides:")) {
 449                                 char *i, *w;
 450                                 size_t z;
 451
 452                                 state = LSB;
 453
 454                                 FOREACH_WORD(w, z, t+9, i) {
 455                                         char *n, *m;
 456
 457                                         if (!(n = strndup(w, z))) {
 458                                                 r = -ENOMEM;
 459                                                 goto finish;
 460                                         }
 461
 462                                         r = sysv_translate_name(n, &m);
 463                                         free(n);
 464
 465                                         if (r < 0)
 466                                                 goto finish;
 467
 468                                         if (r == 0)
 469                                                 continue;
 470
 471                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 472                                                 r = unit_add_name(u, m);
 473                                         else {
 474                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
 475                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
 476                                         }
 477
 478                                         free(m);
 479
 480                                         if (r < 0)
 481                                                 goto finish;
 482                                 }
 483
 484                         } else if (startswith(t, "Required-Start:") ||
 485                                    startswith(t, "Should-Start:")) {
 486                                 char *i, *w;
 487                                 size_t z;
 488
 489                                 state = LSB;
 490
 491                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 492                                         char *n, *m;
 493
 494                                         if (!(n = strndup(w, z))) {
 495                                                 r = -ENOMEM;
 496                                                 goto finish;
 497                                         }
 498
 499                                         r = sysv_translate_name(n, &m);
 500                                         free(n);
 501
 502                                         if (r < 0)
 503                                                 goto finish;
 504
 505                                         if (r == 0)
 506                                                 continue;
 507
 508                                         r = unit_add_dependency_by_name(u, UNIT_AFTER, m);
 509                                         free(m);
 510
 511                                         if (r < 0)
 512                                                 goto finish;
 513                                 }
 514                         } else if (startswith(t, "Default-Start:")) {
 515                                 char *k, *d;
 516
 517                                 state = LSB;
 518
 519                                 k = delete_chars(t+14, WHITESPACE "-");
 520
 521                                 if (k[0] != 0) {
 522                                         if (!(d = strdup(k))) {
 523                                                 r = -ENOMEM;
 524                                                 goto finish;
 525                                         }
 526
 527                                         free(s->sysv_runlevels);
 528                                         s->sysv_runlevels = d;
 529                                 }
 530
 531                         } else if (startswith(t, "Description:")) {
 532                                 char *d;
 533
 534                                 state = LSB_DESCRIPTION;
 535
 536                                 if (!(d = strdup(strstrip(t+12)))) {
 537                                         r = -ENOMEM;
 538                                         goto finish;
 539                                 }
 540
 541                                 free(u->meta.description);
 542                                 u->meta.description = d;
 543
 544                         } else if (startswith(t, "Short-Description:") &&
 545                                    !u->meta.description) {
 546                                 char *d;
 547
 548                                 /* We use the short description only
 549                                  * if no long description is set. */
 550
 551                                 state = LSB;
 552
 553                                 if (!(d = strdup(strstrip(t+18)))) {
 554                                         r = -ENOMEM;
 555                                         goto finish;
 556                                 }
 557
 558                                 u->meta.description = d;
 559
 560                         } else if (state == LSB_DESCRIPTION) {
 561
 562                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 563                                         char *d;
 564
 565                                         assert(u->meta.description);
 566                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 567                                                 r = -ENOMEM;
 568                                                 goto finish;
 569                                         }
 570
 571                                         free(u->meta.description);
 572                                         u->meta.description = d;
 573                                 } else
 574                                         state = LSB;
 575                         }
 576                 }
 577         }
 578
 579         /* If init scripts have no LSB header, then we enforce the
 580          * ordering via the chkconfig priorities. We try to determine
 581          * a priority for *all* init scripts here, since they are
 582          * needed as soon as at least one non-LSB script is used. */
 583
 584         if (s->sysv_start_priority < 0) {
 585                 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
 586
 587                 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
 588                         goto finish;
 589
 590                 if (s->sysv_start_priority < 0)
 591                         log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
 592         }
 593
 594         if ((r = sysv_exec_commands(s)) < 0)
 595                 goto finish;
 596
 597         if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
 598                 /* If there a runlevels configured for this service
 599                  * but none of the standard ones, then we assume this
 600                  * is some special kind of service (which might be
 601                  * needed for early boot) and don't create any links
 602                  * to it. */
 603
 604                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
 605                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
 606                         goto finish;
 607         }
 608
 609         u->meta.load_state = UNIT_LOADED;
 610         r = 0;
 611
 612 finish:
 613
 614         if (f)
 615                 fclose(f);
 616
 617         return r;
 618 }
 619
 620 static int service_load_sysv_name(Service *s, const char *name) {
 621         char **p;
 622
 623         assert(s);
 624         assert(name);
 625
 626         STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
 627                 char *path;
 628                 int r;
 629
 630                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 631                         return -ENOMEM;
 632
 633                 assert(endswith(path, ".service"));
 634                 path[strlen(path)-8] = 0;
 635
 636                 r = service_load_sysv_path(s, path);
 637                 free(path);
 638
 639                 if (r < 0)
 640                         return r;
 641
 642                 if ((UNIT(s)->meta.load_state != UNIT_STUB))
 643                         break;
 644         }
 645
 646         return 0;
 647 }
 648
 649 static int service_load_sysv(Service *s) {
 650         const char *t;
 651         Iterator i;
 652         int r;
 653
 654         assert(s);
 655
 656         /* Load service data from SysV init scripts, preferably with
 657          * LSB headers ... */
 658
 659         if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
 660                 return 0;
 661
 662         if ((t = unit_id(UNIT(s))))
 663                 if ((r = service_load_sysv_name(s, t)) < 0)
 664                         return r;
 665
 666         if (UNIT(s)->meta.load_state == UNIT_STUB)
 667                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 668                         if (t == unit_id(UNIT(s)))
 669                                 continue;
 670
 671                         if ((r == service_load_sysv_name(s, t)) < 0)
 672                                 return r;
 673
 674                         if (UNIT(s)->meta.load_state != UNIT_STUB)
 675                                 break;
 676                 }
 677
 678         return 0;
 679 }
 680
 681 static void service_init(Unit *u) {
 682         Service *s = SERVICE(u);
 683
 684         assert(u);
 685         assert(u->meta.load_state == UNIT_STUB);
 686
 687         s->type = 0;
 688         s->restart = 0;
 689
 690         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 691         s->restart_usec = DEFAULT_RESTART_USEC;
 692
 693         exec_context_init(&s->exec_context);
 694
 695         s->timer_watch.type = WATCH_INVALID;
 696
 697         s->state = SERVICE_DEAD;
 698
 699         s->sysv_start_priority = -1;
 700         s->permissions_start_only = false;
 701         s->root_directory_start_only = false;
 702         s->valid_no_process = false;
 703         s->kill_mode = 0;
 704         s->sysv_has_lsb = false;
 705         s->main_pid = s->control_pid = 0;
 706         s->main_pid_known = false;
 707         s->failure = false;
 708
 709         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 710 }
 711
 712 static int service_load(Unit *u) {
 713         int r;
 714         Service *s = SERVICE(u);
 715
 716         assert(s);
 717
 718         /* Load a .service file */
 719         if ((r = unit_load_fragment(u)) < 0)
 720                 return r;
 721
 722         /* Load a classic init script as a fallback, if we couldn't find anything */
 723         if (u->meta.load_state == UNIT_STUB)
 724                 if ((r = service_load_sysv(s)) < 0)
 725                         return r;
 726
 727         /* Still nothing found? Then let's give up */
 728         if (u->meta.load_state == UNIT_STUB)
 729                 return -ENOENT;
 730
 731         /* We were able to load something, then let's add in the
 732          * dropin directories. */
 733         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 734                 return r;
 735
 736         /* This is a new unit? Then let's add in some extras */
 737         if (u->meta.load_state == UNIT_LOADED) {
 738                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 739                         return r;
 740
 741                 if ((r = unit_add_default_cgroup(u)) < 0)
 742                         return r;
 743
 744                 if ((r = sysv_chkconfig_order(s)) < 0)
 745                         return r;
 746         }
 747
 748         return 0;
 749 }
 750
 751 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 752
 753         ServiceExecCommand c;
 754         Service *s = SERVICE(u);
 755         const char *prefix2;
 756         char *p2;
 757
 758         assert(s);
 759
 760         p2 = strappend(prefix, "\t");
 761         prefix2 = p2 ? p2 : prefix;
 762
 763         fprintf(f,
 764                 "%sService State: %s\n"
 765                 "%sPermissionsStartOnly: %s\n"
 766                 "%sRootDirectoryStartOnly: %s\n"
 767                 "%sValidNoProcess: %s\n"
 768                 "%sKillMode: %s\n"
 769                 "%sType: %s\n",
 770                 prefix, service_state_to_string(s->state),
 771                 prefix, yes_no(s->permissions_start_only),
 772                 prefix, yes_no(s->root_directory_start_only),
 773                 prefix, yes_no(s->valid_no_process),
 774                 prefix, kill_mode_to_string(s->kill_mode),
 775                 prefix, service_type_to_string(s->type));
 776
 777         if (s->control_pid > 0)
 778                 fprintf(f,
 779                         "%sControl PID: %llu\n",
 780                         prefix, (unsigned long long) s->control_pid);
 781
 782         if (s->main_pid > 0)
 783                 fprintf(f,
 784                         "%sMain PID: %llu\n",
 785                         prefix, (unsigned long long) s->main_pid);
 786
 787         if (s->pid_file)
 788                 fprintf(f,
 789                         "%sPIDFile: %s\n",
 790                         prefix, s->pid_file);
 791
 792         exec_context_dump(&s->exec_context, f, prefix);
 793
 794         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 795
 796                 if (!s->exec_command[c])
 797                         continue;
 798
 799                 fprintf(f, "%s→ %s:\n",
 800                         prefix, service_exec_command_to_string(c));
 801
 802                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 803         }
 804
 805         if (s->sysv_path)
 806                 fprintf(f,
 807                         "%sSysV Init Script Path: %s\n"
 808                         "%sSysV Init Script has LSB Header: %s\n",
 809                         prefix, s->sysv_path,
 810                         prefix, yes_no(s->sysv_has_lsb));
 811
 812         if (s->sysv_start_priority >= 0)
 813                 fprintf(f,
 814                         "%sSysVStartPriority: %i\n",
 815                         prefix, s->sysv_start_priority);
 816
 817         if (s->sysv_runlevels)
 818                 fprintf(f, "%sSysVRunLevels: %s\n",
 819                         prefix, s->sysv_runlevels);
 820
 821         free(p2);
 822 }
 823
 824 static int service_load_pid_file(Service *s) {
 825         char *k;
 826         unsigned long p;
 827         int r;
 828
 829         assert(s);
 830
 831         if (s->main_pid_known)
 832                 return 0;
 833
 834         if (!s->pid_file)
 835                 return -ENOENT;
 836
 837         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 838                 return r;
 839
 840         if ((r = safe_atolu(k, &p)) < 0) {
 841                 free(k);
 842                 return r;
 843         }
 844
 845         if ((unsigned long) (pid_t) p != p)
 846                 return -ERANGE;
 847
 848         if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
 849                 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
 850                             (unsigned long long) p, s->pid_file);
 851                 return -ESRCH;
 852         }
 853
 854         if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
 855                 /* FIXME: we need to do something here */
 856                 return r;
 857
 858         s->main_pid = (pid_t) p;
 859         s->main_pid_known = true;
 860
 861         return 0;
 862 }
 863
 864 static int service_get_sockets(Service *s, Set **_set) {
 865         Set *set;
 866         Iterator i;
 867         char *t;
 868         int r;
 869
 870         assert(s);
 871         assert(_set);
 872
 873         /* Collects all Socket objects that belong to this
 874          * service. Note that a service might have multiple sockets
 875          * via multiple names. */
 876
 877         if (!(set = set_new(NULL, NULL)))
 878                 return -ENOMEM;
 879
 880         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 881                 char *k;
 882                 Unit *p;
 883
 884                 /* Look for all socket objects that go by any of our
 885                  * units and collect their fds */
 886
 887                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
 888                         r = -ENOMEM;
 889                         goto fail;
 890                 }
 891
 892                 p = manager_get_unit(UNIT(s)->meta.manager, k);
 893                 free(k);
 894
 895                 if (!p) continue;
 896
 897                 if ((r = set_put(set, p)) < 0)
 898                         goto fail;
 899         }
 900
 901         *_set = set;
 902         return 0;
 903
 904 fail:
 905         set_free(set);
 906         return r;
 907 }
 908
 909
 910 static int service_notify_sockets_dead(Service *s) {
 911         Iterator i;
 912         Set *set;
 913         Socket *sock;
 914         int r;
 915
 916         assert(s);
 917
 918         /* Notifies all our sockets when we die */
 919
 920         if ((r = service_get_sockets(s, &set)) < 0)
 921                 return r;
 922
 923         SET_FOREACH(sock, set, i)
 924                 socket_notify_service_dead(sock);
 925
 926         set_free(set);
 927
 928         return 0;
 929 }
 930
 931 static void service_set_state(Service *s, ServiceState state) {
 932         ServiceState old_state;
 933         assert(s);
 934
 935         old_state = s->state;
 936         s->state = state;
 937
 938         if (state != SERVICE_START_PRE &&
 939             state != SERVICE_START &&
 940             state != SERVICE_START_POST &&
 941             state != SERVICE_RELOAD &&
 942             state != SERVICE_STOP &&
 943             state != SERVICE_STOP_SIGTERM &&
 944             state != SERVICE_STOP_SIGKILL &&
 945             state != SERVICE_STOP_POST &&
 946             state != SERVICE_FINAL_SIGTERM &&
 947             state != SERVICE_FINAL_SIGKILL &&
 948             state != SERVICE_AUTO_RESTART)
 949                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
 950
 951         if (state != SERVICE_START &&
 952             state != SERVICE_START_POST &&
 953             state != SERVICE_RUNNING &&
 954             state != SERVICE_RELOAD &&
 955             state != SERVICE_STOP &&
 956             state != SERVICE_STOP_SIGTERM &&
 957             state != SERVICE_STOP_SIGKILL)
 958                 if (s->main_pid > 0) {
 959                         unit_unwatch_pid(UNIT(s), s->main_pid);
 960                         s->main_pid = 0;
 961                 }
 962
 963         if (state != SERVICE_START_PRE &&
 964             state != SERVICE_START &&
 965             state != SERVICE_START_POST &&
 966             state != SERVICE_RELOAD &&
 967             state != SERVICE_STOP &&
 968             state != SERVICE_STOP_SIGTERM &&
 969             state != SERVICE_STOP_SIGKILL &&
 970             state != SERVICE_STOP_POST &&
 971             state != SERVICE_FINAL_SIGTERM &&
 972             state != SERVICE_FINAL_SIGKILL) {
 973                 if (s->control_pid > 0) {
 974                         unit_unwatch_pid(UNIT(s), s->control_pid);
 975                         s->control_pid = 0;
 976                 }
 977
 978                 s->control_command = NULL;
 979         }
 980
 981         if (state == SERVICE_DEAD ||
 982             state == SERVICE_STOP ||
 983             state == SERVICE_STOP_SIGTERM ||
 984             state == SERVICE_STOP_SIGKILL ||
 985             state == SERVICE_STOP_POST ||
 986             state == SERVICE_FINAL_SIGTERM ||
 987             state == SERVICE_FINAL_SIGKILL ||
 988             state == SERVICE_MAINTAINANCE ||
 989             state == SERVICE_AUTO_RESTART)
 990                 service_notify_sockets_dead(s);
 991
 992         if (old_state != state)
 993                 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
 994
 995         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
 996 }
 997
 998 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
 999         Iterator i;
1000         int r;
1001         int *rfds = NULL;
1002         unsigned rn_fds = 0;
1003         Set *set;
1004         Socket *sock;
1005
1006         assert(s);
1007         assert(fds);
1008         assert(n_fds);
1009
1010         if ((r = service_get_sockets(s, &set)) < 0)
1011                 return r;
1012
1013         SET_FOREACH(sock, set, i) {
1014                 int *cfds;
1015                 unsigned cn_fds;
1016
1017                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1018                         goto fail;
1019
1020                 if (!cfds)
1021                         continue;
1022
1023                 if (!rfds) {
1024                         rfds = cfds;
1025                         rn_fds = cn_fds;
1026                 } else {
1027                         int *t;
1028
1029                         if (!(t = new(int, rn_fds+cn_fds))) {
1030                                 free(cfds);
1031                                 r = -ENOMEM;
1032                                 goto fail;
1033                         }
1034
1035                         memcpy(t, rfds, rn_fds);
1036                         memcpy(t+rn_fds, cfds, cn_fds);
1037                         free(rfds);
1038                         free(cfds);
1039
1040                         rfds = t;
1041                         rn_fds = rn_fds+cn_fds;
1042                 }
1043         }
1044
1045         *fds = rfds;
1046         *n_fds = rn_fds;
1047
1048         set_free(set);
1049
1050         return 0;
1051
1052 fail:
1053         set_free(set);
1054         free(rfds);
1055
1056         return r;
1057 }
1058
1059 static int service_spawn(
1060                 Service *s,
1061                 ExecCommand *c,
1062                 bool timeout,
1063                 bool pass_fds,
1064                 bool apply_permissions,
1065                 bool apply_chroot,
1066                 pid_t *_pid) {
1067
1068         pid_t pid;
1069         int r;
1070         int *fds = NULL;
1071         unsigned n_fds = 0;
1072
1073         assert(s);
1074         assert(c);
1075         assert(_pid);
1076
1077         if (pass_fds)
1078                 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1079                         goto fail;
1080
1081         if (timeout) {
1082                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1083                         goto fail;
1084         } else
1085                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1086
1087         if ((r = exec_spawn(c,
1088                             &s->exec_context,
1089                             fds, n_fds,
1090                             apply_permissions,
1091                             apply_chroot,
1092                             UNIT(s)->meta.cgroup_bondings,
1093                             &pid)) < 0)
1094                 goto fail;
1095
1096         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1097                 /* FIXME: we need to do something here */
1098                 goto fail;
1099
1100         free(fds);
1101         *_pid = pid;
1102
1103         return 0;
1104
1105 fail:
1106         free(fds);
1107
1108         if (timeout)
1109                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1110
1111         return r;
1112 }
1113
1114 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1115         int r;
1116         assert(s);
1117
1118         if (!success)
1119                 s->failure = true;
1120
1121         if (allow_restart &&
1122             (s->restart == SERVICE_RESTART_ALWAYS ||
1123              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1124
1125                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1126                         goto fail;
1127
1128                 service_set_state(s, SERVICE_AUTO_RESTART);
1129         } else
1130                 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1131
1132         return;
1133
1134 fail:
1135         log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1136         service_enter_dead(s, false, false);
1137 }
1138
1139 static void service_enter_signal(Service *s, ServiceState state, bool success);
1140
1141 static void service_enter_stop_post(Service *s, bool success) {
1142         int r;
1143         assert(s);
1144
1145         if (!success)
1146                 s->failure = true;
1147
1148         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1149                 if ((r = service_spawn(s,
1150                                        s->control_command,
1151                                        true,
1152                                        false,
1153                                        !s->permissions_start_only,
1154                                        !s->root_directory_start_only,
1155                                        &s->control_pid)) < 0)
1156                         goto fail;
1157
1158
1159         service_set_state(s, SERVICE_STOP_POST);
1160
1161         if (!s->control_command)
1162                 service_enter_dead(s, true, true);
1163
1164         return;
1165
1166 fail:
1167         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1168         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1169 }
1170
1171 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1172         int r;
1173         bool sent = false;
1174
1175         assert(s);
1176
1177         if (!success)
1178                 s->failure = true;
1179
1180         if (s->main_pid > 0 || s->control_pid > 0) {
1181                 int sig;
1182
1183                 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1184
1185                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1186
1187                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1188                                 if (r != -EAGAIN && r != -ESRCH)
1189                                         goto fail;
1190                         } else
1191                                 sent = true;
1192                 }
1193
1194                 if (!sent) {
1195                         r = 0;
1196                         if (s->main_pid > 0) {
1197                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1198                                         r = -errno;
1199                                 else
1200                                         sent = true;
1201                         }
1202
1203                         if (s->control_pid > 0) {
1204                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1205                                         r = -errno;
1206                                 else
1207                                         sent = true;
1208                         }
1209
1210                         if (r < 0)
1211                                 goto fail;
1212                 }
1213         }
1214
1215         service_set_state(s, state);
1216
1217         if (s->main_pid <= 0 && s->control_pid <= 0)
1218                 service_enter_dead(s, true, true);
1219
1220         return;
1221
1222 fail:
1223         log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1224
1225         if (sent)  {
1226                 s->failure = true;
1227                 service_set_state(s, state);
1228         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1229                 service_enter_stop_post(s, false);
1230         else
1231                 service_enter_dead(s, false, true);
1232 }
1233
1234 static void service_enter_stop(Service *s, bool success) {
1235         int r;
1236         assert(s);
1237
1238         if (!success)
1239                 s->failure = true;
1240
1241         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1242                 if ((r = service_spawn(s,
1243                                        s->control_command,
1244                                        true,
1245                                        false,
1246                                        !s->permissions_start_only,
1247                                        !s->root_directory_start_only,
1248                                        &s->control_pid)) < 0)
1249                         goto fail;
1250
1251         service_set_state(s, SERVICE_STOP);
1252
1253         if (!s->control_command)
1254                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1255
1256         return;
1257
1258 fail:
1259         log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1260         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1261 }
1262
1263 static void service_enter_start_post(Service *s) {
1264         int r;
1265         assert(s);
1266
1267         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1268                 if ((r = service_spawn(s,
1269                                        s->control_command,
1270                                        true,
1271                                        false,
1272                                        !s->permissions_start_only,
1273                                        !s->root_directory_start_only,
1274                                        &s->control_pid)) < 0)
1275                         goto fail;
1276
1277
1278         service_set_state(s, SERVICE_START_POST);
1279
1280         if (!s->control_command)
1281                 service_set_state(s, SERVICE_RUNNING);
1282
1283         return;
1284
1285 fail:
1286         log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1287         service_enter_stop(s, false);
1288 }
1289
1290 static void service_enter_start(Service *s) {
1291         pid_t pid;
1292         int r;
1293
1294         assert(s);
1295
1296         assert(s->exec_command[SERVICE_EXEC_START]);
1297         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1298
1299         if ((r = service_spawn(s,
1300                                s->exec_command[SERVICE_EXEC_START],
1301                                s->type == SERVICE_FORKING,
1302                                true,
1303                                true,
1304                                true,
1305                                &pid)) < 0)
1306                 goto fail;
1307
1308         service_set_state(s, SERVICE_START);
1309
1310         if (s->type == SERVICE_SIMPLE) {
1311                 /* For simple services we immediately start
1312                  * the START_POST binaries. */
1313
1314                 s->main_pid = pid;
1315                 s->main_pid_known = true;
1316                 service_enter_start_post(s);
1317
1318         } else  if (s->type == SERVICE_FORKING) {
1319
1320                 /* For forking services we wait until the start
1321                  * process exited. */
1322
1323                 s->control_pid = pid;
1324                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1325         } else if (s->type == SERVICE_FINISH) {
1326
1327                 /* For finishing services we wait until the start
1328                  * process exited, too, but it is our main process. */
1329
1330                 s->main_pid = pid;
1331                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1332         } else
1333                 assert_not_reached("Unknown service type");
1334
1335         return;
1336
1337 fail:
1338         log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1339         service_enter_stop(s, false);
1340 }
1341
1342 static void service_enter_start_pre(Service *s) {
1343         int r;
1344
1345         assert(s);
1346
1347         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1348                 if ((r = service_spawn(s,
1349                                        s->control_command,
1350                                        true,
1351                                        false,
1352                                        !s->permissions_start_only,
1353                                        !s->root_directory_start_only,
1354                                        &s->control_pid)) < 0)
1355                         goto fail;
1356
1357         service_set_state(s, SERVICE_START_PRE);
1358
1359         if (!s->control_command)
1360                 service_enter_start(s);
1361
1362         return;
1363
1364 fail:
1365         log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1366         service_enter_dead(s, false, true);
1367 }
1368
1369 static void service_enter_restart(Service *s) {
1370         int r;
1371         assert(s);
1372
1373         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1374                 goto fail;
1375
1376         log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1377         service_enter_dead(s, true, false);
1378         return;
1379
1380 fail:
1381
1382         log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1383         service_enter_dead(s, false, false);
1384 }
1385
1386 static void service_enter_reload(Service *s) {
1387         int r;
1388
1389         assert(s);
1390
1391         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1392                 if ((r = service_spawn(s,
1393                                        s->control_command,
1394                                        true,
1395                                        false,
1396                                        !s->permissions_start_only,
1397                                        !s->root_directory_start_only,
1398                                        &s->control_pid)) < 0)
1399                         goto fail;
1400
1401         service_set_state(s, SERVICE_RELOAD);
1402
1403         if (!s->control_command)
1404                 service_set_state(s, SERVICE_RUNNING);
1405
1406         return;
1407
1408 fail:
1409         log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1410         service_enter_stop(s, false);
1411 }
1412
1413 static void service_run_next(Service *s, bool success) {
1414         int r;
1415
1416         assert(s);
1417         assert(s->control_command);
1418         assert(s->control_command->command_next);
1419
1420         if (!success)
1421                 s->failure = true;
1422
1423         s->control_command = s->control_command->command_next;
1424
1425         if ((r = service_spawn(s,
1426                                s->control_command,
1427                                true,
1428                                false,
1429                                !s->permissions_start_only,
1430                                !s->root_directory_start_only,
1431                                &s->control_pid)) < 0)
1432                 goto fail;
1433
1434         return;
1435
1436 fail:
1437         log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1438
1439         if (s->state == SERVICE_STOP)
1440                 service_enter_stop_post(s, false);
1441         else if (s->state == SERVICE_STOP_POST)
1442                 service_enter_dead(s, false, true);
1443         else
1444                 service_enter_stop(s, false);
1445 }
1446
1447 static int service_start(Unit *u) {
1448         Service *s = SERVICE(u);
1449
1450         assert(s);
1451
1452         /* We cannot fulfill this request right now, try again later
1453          * please! */
1454         if (s->state == SERVICE_STOP ||
1455             s->state == SERVICE_STOP_SIGTERM ||
1456             s->state == SERVICE_STOP_SIGKILL ||
1457             s->state == SERVICE_STOP_POST ||
1458             s->state == SERVICE_FINAL_SIGTERM ||
1459             s->state == SERVICE_FINAL_SIGKILL)
1460                 return -EAGAIN;
1461
1462         /* Already on it! */
1463         if (s->state == SERVICE_START_PRE ||
1464             s->state == SERVICE_START ||
1465             s->state == SERVICE_START_POST)
1466                 return 0;
1467
1468         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1469
1470         /* Make sure we don't enter a busy loop of some kind. */
1471         if (!ratelimit_test(&s->ratelimit)) {
1472                 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1473                 return -EAGAIN;
1474         }
1475
1476         s->failure = false;
1477         s->main_pid_known = false;
1478
1479         service_enter_start_pre(s);
1480         return 0;
1481 }
1482
1483 static int service_stop(Unit *u) {
1484         Service *s = SERVICE(u);
1485
1486         assert(s);
1487
1488         /* Cannot do this now */
1489         if (s->state == SERVICE_START_PRE ||
1490             s->state == SERVICE_START ||
1491             s->state == SERVICE_START_POST ||
1492             s->state == SERVICE_RELOAD)
1493                 return -EAGAIN;
1494
1495         /* Already on it */
1496         if (s->state == SERVICE_STOP ||
1497             s->state == SERVICE_STOP_SIGTERM ||
1498             s->state == SERVICE_STOP_SIGKILL ||
1499             s->state == SERVICE_STOP_POST ||
1500             s->state == SERVICE_FINAL_SIGTERM ||
1501             s->state == SERVICE_FINAL_SIGKILL)
1502                 return 0;
1503
1504         if (s->state == SERVICE_AUTO_RESTART) {
1505                 service_set_state(s, SERVICE_DEAD);
1506                 return 0;
1507         }
1508
1509         assert(s->state == SERVICE_RUNNING);
1510
1511         service_enter_stop(s, true);
1512         return 0;
1513 }
1514
1515 static int service_reload(Unit *u) {
1516         Service *s = SERVICE(u);
1517
1518         assert(s);
1519
1520         assert(s->state == SERVICE_RUNNING);
1521
1522         service_enter_reload(s);
1523         return 0;
1524 }
1525
1526 static bool service_can_reload(Unit *u) {
1527         Service *s = SERVICE(u);
1528
1529         assert(s);
1530
1531         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1532 }
1533
1534 static UnitActiveState service_active_state(Unit *u) {
1535         assert(u);
1536
1537         return state_translation_table[SERVICE(u)->state];
1538 }
1539
1540 static int main_pid_good(Service *s) {
1541         assert(s);
1542
1543         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1544          * don't know */
1545
1546         /* If we know the pid file, then lets just check if it is
1547          * still valid */
1548         if (s->main_pid_known)
1549                 return s->main_pid > 0;
1550
1551         /* We don't know the pid */
1552         return -EAGAIN;
1553 }
1554
1555 static bool control_pid_good(Service *s) {
1556         assert(s);
1557
1558         return s->control_pid > 0;
1559 }
1560
1561 static int cgroup_good(Service *s) {
1562         assert(s);
1563
1564         if (s->valid_no_process)
1565                 return -EAGAIN;
1566
1567         return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1568 }
1569
1570 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1571         Service *s = SERVICE(u);
1572         bool success;
1573
1574         assert(s);
1575         assert(pid >= 0);
1576
1577         success = code == CLD_EXITED && status == 0;
1578         s->failure = s->failure || !success;
1579
1580         if (s->main_pid == pid) {
1581
1582                 exec_status_fill(&s->main_exec_status, pid, code, status);
1583                 s->main_pid = 0;
1584
1585                 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1586                         assert(s->exec_command[SERVICE_EXEC_START]);
1587                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1588                 }
1589
1590                 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
1591
1592                 /* The service exited, so the service is officially
1593                  * gone. */
1594
1595                 switch (s->state) {
1596
1597                 case SERVICE_START_POST:
1598                 case SERVICE_RELOAD:
1599                 case SERVICE_STOP:
1600                         /* Need to wait until the operation is
1601                          * done */
1602                         break;
1603
1604                 case SERVICE_START:
1605                         assert(s->type == SERVICE_FINISH);
1606
1607                         /* This was our main goal, so let's go on */
1608                         if (success)
1609                                 service_enter_start_post(s);
1610                         else
1611                                 service_enter_stop(s, false);
1612                         break;
1613
1614                 case SERVICE_RUNNING:
1615                         service_enter_stop(s, success);
1616                         break;
1617
1618                 case SERVICE_STOP_SIGTERM:
1619                 case SERVICE_STOP_SIGKILL:
1620
1621                         if (!control_pid_good(s))
1622                                 service_enter_stop_post(s, success);
1623
1624                         /* If there is still a control process, wait for that first */
1625                         break;
1626
1627                 default:
1628                         assert_not_reached("Uh, main process died at wrong time.");
1629                 }
1630
1631         } else if (s->control_pid == pid) {
1632                 assert(s->control_command);
1633
1634                 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1635                 s->control_pid = 0;
1636
1637                 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1638
1639                 /* If we are shutting things down anyway we
1640                  * don't care about failing commands. */
1641
1642                 if (s->control_command->command_next &&
1643                     (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1644
1645                         /* There is another command to *
1646                          * execute, so let's do that. */
1647
1648                         service_run_next(s, success);
1649
1650                 else {
1651                         /* No further commands for this step, so let's
1652                          * figure out what to do next */
1653
1654                         log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1655
1656                         switch (s->state) {
1657
1658                         case SERVICE_START_PRE:
1659                                 if (success)
1660                                         service_enter_start(s);
1661                                 else
1662                                         service_enter_stop(s, false);
1663                                 break;
1664
1665                         case SERVICE_START:
1666                                 assert(s->type == SERVICE_FORKING);
1667
1668                                 /* Let's try to load the pid
1669                                  * file here if we can. We
1670                                  * ignore the return value,
1671                                  * since the PID file might
1672                                  * actually be created by a
1673                                  * START_POST script */
1674
1675                                 if (success) {
1676                                         if (s->pid_file)
1677                                                 service_load_pid_file(s);
1678
1679                                         service_enter_start_post(s);
1680                                 } else
1681                                         service_enter_stop(s, false);
1682
1683                                 break;
1684
1685                         case SERVICE_START_POST:
1686                                 if (success && s->pid_file && !s->main_pid_known) {
1687                                         int r;
1688
1689                                         /* Hmm, let's see if we can
1690                                          * load the pid now after the
1691                                          * start-post scripts got
1692                                          * executed. */
1693
1694                                         if ((r = service_load_pid_file(s)) < 0)
1695                                                 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1696                                 }
1697
1698                                 /* Fall through */
1699
1700                         case SERVICE_RELOAD:
1701                                 if (success) {
1702                                         if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1703                                                 service_set_state(s, SERVICE_RUNNING);
1704                                         else
1705                                                 service_enter_stop(s, true);
1706                                 } else
1707                                         service_enter_stop(s, false);
1708
1709                                 break;
1710
1711                         case SERVICE_STOP:
1712                                 if (main_pid_good(s) > 0)
1713                                         /* Still not dead and we know the PID? Let's go hunting. */
1714                                         service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1715                                 else
1716                                         service_enter_stop_post(s, success);
1717                                 break;
1718
1719                         case SERVICE_STOP_SIGTERM:
1720                         case SERVICE_STOP_SIGKILL:
1721                                 if (main_pid_good(s) <= 0)
1722                                         service_enter_stop_post(s, success);
1723
1724                                 /* If there is still a service
1725                                  * process around, wait until
1726                                  * that one quit, too */
1727                                 break;
1728
1729                         case SERVICE_STOP_POST:
1730                         case SERVICE_FINAL_SIGTERM:
1731                         case SERVICE_FINAL_SIGKILL:
1732                                 service_enter_dead(s, success, true);
1733                                 break;
1734
1735                         default:
1736                                 assert_not_reached("Uh, control process died at wrong time.");
1737                         }
1738                 }
1739         } else
1740                 assert_not_reached("Got SIGCHLD for unkown PID");
1741 }
1742
1743 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1744         Service *s = SERVICE(u);
1745
1746         assert(s);
1747         assert(elapsed == 1);
1748
1749         assert(w == &s->timer_watch);
1750
1751         switch (s->state) {
1752
1753         case SERVICE_START_PRE:
1754         case SERVICE_START:
1755         case SERVICE_START_POST:
1756         case SERVICE_RELOAD:
1757                 log_warning("%s operation timed out. Stopping.", unit_id(u));
1758                 service_enter_stop(s, false);
1759                 break;
1760
1761         case SERVICE_STOP:
1762                 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1763                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1764                 break;
1765
1766         case SERVICE_STOP_SIGTERM:
1767                 log_warning("%s stopping timed out. Killing.", unit_id(u));
1768                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1769                 break;
1770
1771         case SERVICE_STOP_SIGKILL:
1772                 /* Uh, wie sent a SIGKILL and it is still not gone?
1773                  * Must be something we cannot kill, so let's just be
1774                  * weirded out and continue */
1775
1776                 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1777                 service_enter_stop_post(s, false);
1778                 break;
1779
1780         case SERVICE_STOP_POST:
1781                 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1782                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1783                 break;
1784
1785         case SERVICE_FINAL_SIGTERM:
1786                 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1787                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1788                 break;
1789
1790         case SERVICE_FINAL_SIGKILL:
1791                 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1792                 service_enter_dead(s, false, true);
1793                 break;
1794
1795         case SERVICE_AUTO_RESTART:
1796                 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1797                 service_enter_restart(s);
1798                 break;
1799
1800         default:
1801                 assert_not_reached("Timeout at wrong time.");
1802         }
1803 }
1804
1805 static void service_cgroup_notify_event(Unit *u) {
1806         Service *s = SERVICE(u);
1807
1808         assert(u);
1809
1810         log_debug("%s: cgroup is empty", unit_id(u));
1811
1812         switch (s->state) {
1813
1814                 /* Waiting for SIGCHLD is usually more interesting,
1815                  * because it includes return codes/signals. Which is
1816                  * why we ignore the cgroup events for most cases,
1817                  * except when we don't know pid which to expect the
1818                  * SIGCHLD for. */
1819
1820         case SERVICE_RUNNING:
1821
1822                 if (!s->valid_no_process && main_pid_good(s) <= 0)
1823                         service_enter_stop(s, true);
1824
1825                 break;
1826
1827         default:
1828                 ;
1829         }
1830 }
1831
1832 static int service_enumerate(Manager *m) {
1833         char **p;
1834         unsigned i;
1835         DIR *d = NULL;
1836         char *path = NULL, *fpath = NULL, *name = NULL;
1837         int r;
1838
1839         assert(m);
1840
1841         STRV_FOREACH(p, m->sysvrcnd_path)
1842                 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1843                         struct dirent *de;
1844
1845                         free(path);
1846                         path = NULL;
1847                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1848                                 r = -ENOMEM;
1849                                 goto finish;
1850                         }
1851
1852                         if (d)
1853                                 closedir(d);
1854
1855                         if (!(d = opendir(path))) {
1856                                 if (errno != ENOENT)
1857                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
1858
1859                                 continue;
1860                         }
1861
1862                         while ((de = readdir(d))) {
1863                                 Unit *runlevel, *service;
1864
1865                                 if (ignore_file(de->d_name))
1866                                         continue;
1867
1868                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1869                                         continue;
1870
1871                                 if (strlen(de->d_name) < 4)
1872                                         continue;
1873
1874                                 free(fpath);
1875                                 fpath = NULL;
1876                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1877                                         r = -ENOMEM;
1878                                         goto finish;
1879                                 }
1880
1881                                 if (access(fpath, X_OK) < 0) {
1882
1883                                         if (errno != ENOENT)
1884                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1885
1886                                         continue;
1887                                 }
1888
1889                                 free(name);
1890                                 name = NULL;
1891                                 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1892                                         r = -ENOMEM;
1893                                         goto finish;
1894                                 }
1895
1896                                 if ((r = manager_load_unit(m, name, &service)) < 0)
1897                                         goto finish;
1898
1899                                 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1900                                         goto finish;
1901
1902                                 if (de->d_name[0] == 'S') {
1903                                         if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1904                                                 goto finish;
1905
1906                                         if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1907                                                 goto finish;
1908
1909                                 } else if (de->d_name[0] == 'K' &&
1910                                            (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1911                                             streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1912
1913                                         /* We honour K links only for
1914                                          * halt/reboot. For the normal
1915                                          * runlevels we assume the
1916                                          * stop jobs will be
1917                                          * implicitly added by the
1918                                          * core logic. */
1919
1920                                         if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1921                                                 goto finish;
1922
1923                                         if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1924                                                 goto finish;
1925                                 }
1926                         }
1927                 }
1928
1929         r = 0;
1930
1931 finish:
1932         free(path);
1933         free(fpath);
1934         free(name);
1935         closedir(d);
1936
1937         return r;
1938 }
1939
1940 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1941         [SERVICE_DEAD] = "dead",
1942         [SERVICE_START_PRE] = "start-pre",
1943         [SERVICE_START] = "start",
1944         [SERVICE_START_POST] = "start-post",
1945         [SERVICE_RUNNING] = "running",
1946         [SERVICE_RELOAD] = "reload",
1947         [SERVICE_STOP] = "stop",
1948         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1949         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1950         [SERVICE_STOP_POST] = "stop-post",
1951         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1952         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1953         [SERVICE_MAINTAINANCE] = "maintainance",
1954         [SERVICE_AUTO_RESTART] = "auto-restart",
1955 };
1956
1957 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1958
1959 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1960         [SERVICE_ONCE] = "once",
1961         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1962         [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1963 };
1964
1965 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1966
1967 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1968         [SERVICE_FORKING] = "forking",
1969         [SERVICE_SIMPLE] = "simple",
1970         [SERVICE_FINISH] = "finish"
1971 };
1972
1973 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1974
1975 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
1976         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1977         [SERVICE_EXEC_START] = "ExecStart",
1978         [SERVICE_EXEC_START_POST] = "ExecStartPost",
1979         [SERVICE_EXEC_RELOAD] = "ExecReload",
1980         [SERVICE_EXEC_STOP] = "ExecStop",
1981         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1982 };
1983
1984 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1985
1986 const UnitVTable service_vtable = {
1987         .suffix = ".service",
1988
1989         .init = service_init,
1990         .load = service_load,
1991         .done = service_done,
1992
1993         .dump = service_dump,
1994
1995         .start = service_start,
1996         .stop = service_stop,
1997         .reload = service_reload,
1998
1999         .can_reload = service_can_reload,
2000
2001         .active_state = service_active_state,
2002
2003         .sigchld_event = service_sigchld_event,
2004         .timer_event = service_timer_event,
2005
2006         .cgroup_notify_empty = service_cgroup_notify_event,
2007
2008         .enumerate = service_enumerate
2009 };