src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26
  27 #include "unit.h"
  28 #include "service.h"
  29 #include "load-fragment.h"
  30 #include "load-dropin.h"
  31 #include "log.h"
  32 #include "strv.h"
  33 #include "unit-name.h"
  34 #include "dbus-service.h"
  35 #include "special.h"
  36
  37 #define COMMENTS "#;\n"
  38 #define NEWLINES "\n\r"
  39 #define LINE_MAX 4096
  40
  41 typedef enum RunlevelType {
  42         RUNLEVEL_UP,
  43         RUNLEVEL_DOWN,
  44         RUNLEVEL_SYSINIT
  45 } RunlevelType;
  46
  47 static const struct {
  48         const char *path;
  49         const char *target;
  50         const RunlevelType type;
  51 } rcnd_table[] = {
  52         /* Standard SysV runlevels */
  53         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  54         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  55         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  56         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  57         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  58         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  59         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN },
  60
  61         /* SUSE style boot.d */
  62         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  63
  64         /* Debian style rcS.d */
  65         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  66 };
  67
  68 #define RUNLEVELS_UP "12345"
  69 /* #define RUNLEVELS_DOWN "06" */
  70 /* #define RUNLEVELS_BOOT "bBsS" */
  71
  72 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  73         [SERVICE_DEAD] = UNIT_INACTIVE,
  74         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  75         [SERVICE_START] = UNIT_ACTIVATING,
  76         [SERVICE_START_POST] = UNIT_ACTIVATING,
  77         [SERVICE_RUNNING] = UNIT_ACTIVE,
  78         [SERVICE_EXITED] = UNIT_ACTIVE,
  79         [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
  80         [SERVICE_STOP] = UNIT_DEACTIVATING,
  81         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
  82         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
  83         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
  84         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
  85         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
  86         [SERVICE_MAINTENANCE] = UNIT_INACTIVE,
  87         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
  88 };
  89
  90 static void service_init(Unit *u) {
  91         Service *s = SERVICE(u);
  92
  93         assert(u);
  94         assert(u->meta.load_state == UNIT_STUB);
  95
  96         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
  97         s->restart_usec = DEFAULT_RESTART_USEC;
  98         s->timer_watch.type = WATCH_INVALID;
  99         s->sysv_start_priority = -1;
 100         s->socket_fd = -1;
 101
 102         exec_context_init(&s->exec_context);
 103
 104         RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
 105
 106         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 107 }
 108
 109 static void service_unwatch_control_pid(Service *s) {
 110         assert(s);
 111
 112         if (s->control_pid <= 0)
 113                 return;
 114
 115         unit_unwatch_pid(UNIT(s), s->control_pid);
 116         s->control_pid = 0;
 117 }
 118
 119 static void service_unwatch_main_pid(Service *s) {
 120         assert(s);
 121
 122         if (s->main_pid <= 0)
 123                 return;
 124
 125         unit_unwatch_pid(UNIT(s), s->main_pid);
 126         s->main_pid = 0;
 127 }
 128
 129 static int service_set_main_pid(Service *s, pid_t pid) {
 130         pid_t ppid;
 131
 132         assert(s);
 133
 134         if (pid <= 1)
 135                 return -EINVAL;
 136
 137         if (pid == getpid())
 138                 return -EINVAL;
 139
 140         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid())
 141                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 142                             s->meta.id, (unsigned long) pid);
 143
 144         s->main_pid = pid;
 145         s->main_pid_known = true;
 146
 147         return 0;
 148 }
 149
 150 static void service_close_socket_fd(Service *s) {
 151         assert(s);
 152
 153         if (s->socket_fd < 0)
 154                 return;
 155
 156         close_nointr_nofail(s->socket_fd);
 157         s->socket_fd = -1;
 158 }
 159
 160 static void service_done(Unit *u) {
 161         Service *s = SERVICE(u);
 162
 163         assert(s);
 164
 165         free(s->pid_file);
 166         s->pid_file = NULL;
 167
 168         free(s->sysv_path);
 169         s->sysv_path = NULL;
 170
 171         free(s->sysv_runlevels);
 172         s->sysv_runlevels = NULL;
 173
 174         free(s->status_text);
 175         s->status_text = NULL;
 176
 177         exec_context_done(&s->exec_context);
 178         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 179         s->control_command = NULL;
 180
 181         /* This will leak a process, but at least no memory or any of
 182          * our resources */
 183         service_unwatch_main_pid(s);
 184         service_unwatch_control_pid(s);
 185
 186         if (s->bus_name)  {
 187                 unit_unwatch_bus_name(UNIT(u), s->bus_name);
 188                 free(s->bus_name);
 189                 s->bus_name = NULL;
 190         }
 191
 192         service_close_socket_fd(s);
 193
 194         unit_unwatch_timer(u, &s->timer_watch);
 195 }
 196
 197 static char *sysv_translate_name(const char *name) {
 198         char *r;
 199
 200         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 201                 return NULL;
 202
 203         if (startswith(name, "boot."))
 204                 /* Drop SuSE-style boot. prefix */
 205                 strcpy(stpcpy(r, name + 5), ".service");
 206         else if (endswith(name, ".sh"))
 207                 /* Drop Debian-style .sh suffix */
 208                 strcpy(stpcpy(r, name) - 3, ".service");
 209         else
 210                 /* Normal init scripts */
 211                 strcpy(stpcpy(r, name), ".service");
 212
 213         return r;
 214 }
 215
 216 static int sysv_translate_facility(const char *name, char **_r) {
 217
 218         static const char * const table[] = {
 219                 /* LSB defined facilities */
 220                 "$local_fs",  SPECIAL_LOCAL_FS_TARGET,
 221                 "$network",   SPECIAL_NETWORK_TARGET,
 222                 "$named",     SPECIAL_NSS_LOOKUP_TARGET,
 223                 "$portmap",   SPECIAL_RPCBIND_TARGET,
 224                 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
 225                 "$syslog",    SPECIAL_SYSLOG_TARGET,
 226                 "$time",      SPECIAL_RTC_SET_TARGET,
 227
 228                 /* Debian extensions */
 229                 "$mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 230                 "$mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 231                 "$x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE
 232         };
 233
 234         unsigned i;
 235         char *r;
 236
 237         for (i = 0; i < ELEMENTSOF(table); i += 2)
 238                 if (streq(table[i], name)) {
 239                         if (!(r = strdup(table[i+1])))
 240                                 return -ENOMEM;
 241
 242                         goto finish;
 243                 }
 244
 245         if (*name == '$')
 246                 return 0;
 247
 248         if (!(r = sysv_translate_name(name)))
 249                 return -ENOMEM;
 250
 251 finish:
 252
 253         if (_r)
 254                 *_r = r;
 255
 256         return 1;
 257 }
 258
 259 static int sysv_fix_order(Service *s) {
 260         Meta *other;
 261         int r;
 262
 263         assert(s);
 264
 265         if (s->sysv_start_priority < 0)
 266                 return 0;
 267
 268         /* For each pair of services where at least one lacks a LSB
 269          * header, we use the start priority value to order things. */
 270
 271         LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
 272                 Service *t;
 273                 UnitDependency d;
 274
 275                 t = (Service*) other;
 276
 277                 if (s == t)
 278                         continue;
 279
 280                 if (t->sysv_start_priority < 0)
 281                         continue;
 282
 283                 /* If both units have modern headers we don't care
 284                  * about the priorities */
 285                 if ((!s->sysv_path || s->sysv_has_lsb) &&
 286                     (!t->sysv_path || t->sysv_has_lsb))
 287                         continue;
 288
 289                 if (t->sysv_start_priority < s->sysv_start_priority)
 290                         d = UNIT_AFTER;
 291                 else if (t->sysv_start_priority > s->sysv_start_priority)
 292                         d = UNIT_BEFORE;
 293                 else
 294                         continue;
 295
 296                 /* FIXME: Maybe we should compare the name here lexicographically? */
 297
 298                 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 299                         return r;
 300         }
 301
 302         return 0;
 303 }
 304
 305 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 306         ExecCommand *c;
 307
 308         if (!(c = new0(ExecCommand, 1)))
 309                 return NULL;
 310
 311         if (!(c->path = strdup(path))) {
 312                 free(c);
 313                 return NULL;
 314         }
 315
 316         if (!(c->argv = strv_new(path, arg1, NULL))) {
 317                 free(c->path);
 318                 free(c);
 319                 return NULL;
 320         }
 321
 322         return c;
 323 }
 324
 325 static int sysv_exec_commands(Service *s) {
 326         ExecCommand *c;
 327
 328         assert(s);
 329         assert(s->sysv_path);
 330
 331         if (!(c = exec_command_new(s->sysv_path, "start")))
 332                 return -ENOMEM;
 333         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 334
 335         if (!(c = exec_command_new(s->sysv_path, "stop")))
 336                 return -ENOMEM;
 337         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 338
 339         if (!(c = exec_command_new(s->sysv_path, "reload")))
 340                 return -ENOMEM;
 341         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 342
 343         return 0;
 344 }
 345
 346 static int service_load_sysv_path(Service *s, const char *path) {
 347         FILE *f;
 348         Unit *u;
 349         unsigned line = 0;
 350         int r;
 351         enum {
 352                 NORMAL,
 353                 DESCRIPTION,
 354                 LSB,
 355                 LSB_DESCRIPTION
 356         } state = NORMAL;
 357
 358         assert(s);
 359         assert(path);
 360
 361         u = UNIT(s);
 362
 363         if (!(f = fopen(path, "re"))) {
 364                 r = errno == ENOENT ? 0 : -errno;
 365                 goto finish;
 366         }
 367
 368         free(s->sysv_path);
 369         if (!(s->sysv_path = strdup(path))) {
 370                 r = -ENOMEM;
 371                 goto finish;
 372         }
 373
 374         while (!feof(f)) {
 375                 char l[LINE_MAX], *t;
 376
 377                 if (!fgets(l, sizeof(l), f)) {
 378                         if (feof(f))
 379                                 break;
 380
 381                         r = -errno;
 382                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 383                         goto finish;
 384                 }
 385
 386                 line++;
 387
 388                 t = strstrip(l);
 389                 if (*t != '#')
 390                         continue;
 391
 392                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 393                         state = LSB;
 394                         s->sysv_has_lsb = true;
 395                         continue;
 396                 }
 397
 398                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 399                         state = NORMAL;
 400                         continue;
 401                 }
 402
 403                 t++;
 404                 t += strspn(t, WHITESPACE);
 405
 406                 if (state == NORMAL) {
 407
 408                         /* Try to parse Red Hat style chkconfig headers */
 409
 410                         if (startswith_no_case(t, "chkconfig:")) {
 411                                 int start_priority;
 412                                 char runlevels[16], *k;
 413
 414                                 state = NORMAL;
 415
 416                                 if (sscanf(t+10, "%15s %i %*i",
 417                                            runlevels,
 418                                            &start_priority) != 2) {
 419
 420                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 421                                         continue;
 422                                 }
 423
 424                                 /* A start priority gathered from the
 425                                  * symlink farms is preferred over the
 426                                  * data from the LSB header. */
 427                                 if (start_priority < 0 || start_priority > 99)
 428                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 429                                 else if (s->sysv_start_priority < 0)
 430                                         s->sysv_start_priority = start_priority;
 431
 432                                 char_array_0(runlevels);
 433                                 k = delete_chars(runlevels, WHITESPACE "-");
 434
 435                                 if (k[0]) {
 436                                         char *d;
 437
 438                                         if (!(d = strdup(k))) {
 439                                                 r = -ENOMEM;
 440                                                 goto finish;
 441                                         }
 442
 443                                         free(s->sysv_runlevels);
 444                                         s->sysv_runlevels = d;
 445                                 }
 446
 447                         } else if (startswith_no_case(t, "description:")) {
 448
 449                                 size_t k = strlen(t);
 450                                 char *d;
 451
 452                                 if (t[k-1] == '\\') {
 453                                         state = DESCRIPTION;
 454                                         t[k-1] = 0;
 455                                 }
 456
 457                                 if (!(d = strdup(strstrip(t+12)))) {
 458                                         r = -ENOMEM;
 459                                         goto finish;
 460                                 }
 461
 462                                 free(u->meta.description);
 463                                 u->meta.description = d;
 464
 465                         } else if (startswith_no_case(t, "pidfile:")) {
 466
 467                                 char *fn;
 468
 469                                 state = NORMAL;
 470
 471                                 fn = strstrip(t+8);
 472                                 if (!path_is_absolute(fn)) {
 473                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 474                                         continue;
 475                                 }
 476
 477                                 if (!(fn = strdup(fn))) {
 478                                         r = -ENOMEM;
 479                                         goto finish;
 480                                 }
 481
 482                                 free(s->pid_file);
 483                                 s->pid_file = fn;
 484                         }
 485
 486                 } else if (state == DESCRIPTION) {
 487
 488                         /* Try to parse Red Hat style description
 489                          * continuation */
 490
 491                         size_t k = strlen(t);
 492                         char *d;
 493
 494                         if (t[k-1] == '\\')
 495                                 t[k-1] = 0;
 496                         else
 497                                 state = NORMAL;
 498
 499                         assert(u->meta.description);
 500                         if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
 501                                 r = -ENOMEM;
 502                                 goto finish;
 503                         }
 504
 505                         free(u->meta.description);
 506                         u->meta.description = d;
 507
 508                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 509
 510                         if (startswith_no_case(t, "Provides:")) {
 511                                 char *i, *w;
 512                                 size_t z;
 513
 514                                 state = LSB;
 515
 516                                 FOREACH_WORD(w, z, t+9, i) {
 517                                         char *n, *m;
 518
 519                                         if (!(n = strndup(w, z))) {
 520                                                 r = -ENOMEM;
 521                                                 goto finish;
 522                                         }
 523
 524                                         r = sysv_translate_facility(n, &m);
 525                                         free(n);
 526
 527                                         if (r < 0)
 528                                                 goto finish;
 529
 530                                         if (r == 0)
 531                                                 continue;
 532
 533                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 534                                                 r = unit_add_name(u, m);
 535                                         else {
 536                                                 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m, NULL, true)) >= 0)
 537                                                         r = unit_add_dependency_by_name(u, UNIT_BEFORE, m, NULL, true);
 538                                         }
 539
 540                                         free(m);
 541
 542                                         if (r < 0)
 543                                                 goto finish;
 544                                 }
 545
 546                         } else if (startswith_no_case(t, "Required-Start:") ||
 547                                    startswith_no_case(t, "Should-Start:") ||
 548                                    startswith_no_case(t, "X-Start-Before:") ||
 549                                    startswith_no_case(t, "X-Start-After:")) {
 550                                 char *i, *w;
 551                                 size_t z;
 552
 553                                 state = LSB;
 554
 555                                 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
 556                                         char *n, *m;
 557
 558                                         if (!(n = strndup(w, z))) {
 559                                                 r = -ENOMEM;
 560                                                 goto finish;
 561                                         }
 562
 563                                         r = sysv_translate_facility(n, &m);
 564                                         free(n);
 565
 566                                         if (r < 0)
 567                                                 goto finish;
 568
 569                                         if (r == 0)
 570                                                 continue;
 571
 572                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 573                                         free(m);
 574
 575                                         if (r < 0)
 576                                                 goto finish;
 577                                 }
 578                         } else if (startswith_no_case(t, "Default-Start:")) {
 579                                 char *k, *d;
 580
 581                                 state = LSB;
 582
 583                                 k = delete_chars(t+14, WHITESPACE "-");
 584
 585                                 if (k[0] != 0) {
 586                                         if (!(d = strdup(k))) {
 587                                                 r = -ENOMEM;
 588                                                 goto finish;
 589                                         }
 590
 591                                         free(s->sysv_runlevels);
 592                                         s->sysv_runlevels = d;
 593                                 }
 594
 595                         } else if (startswith_no_case(t, "Description:")) {
 596                                 char *d;
 597
 598                                 state = LSB_DESCRIPTION;
 599
 600                                 if (!(d = strdup(strstrip(t+12)))) {
 601                                         r = -ENOMEM;
 602                                         goto finish;
 603                                 }
 604
 605                                 free(u->meta.description);
 606                                 u->meta.description = d;
 607
 608                         } else if (startswith_no_case(t, "Short-Description:") &&
 609                                    !u->meta.description) {
 610                                 char *d;
 611
 612                                 /* We use the short description only
 613                                  * if no long description is set. */
 614
 615                                 state = LSB;
 616
 617                                 if (!(d = strdup(strstrip(t+18)))) {
 618                                         r = -ENOMEM;
 619                                         goto finish;
 620                                 }
 621
 622                                 u->meta.description = d;
 623
 624                         } else if (startswith_no_case(t, "X-Interactive:")) {
 625                                 int b;
 626
 627                                 if ((b = parse_boolean(strstrip(t+14))) < 0) {
 628                                         log_warning("[%s:%u] Couldn't parse interactive flag. Ignoring.", path, line);
 629                                         continue;
 630                                 }
 631
 632                                 if (b)
 633                                         s->exec_context.std_input = EXEC_INPUT_TTY;
 634                                 else
 635                                         s->exec_context.std_input = EXEC_INPUT_NULL;
 636
 637                         } else if (state == LSB_DESCRIPTION) {
 638
 639                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 640                                         char *d;
 641
 642                                         assert(u->meta.description);
 643                                         if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
 644                                                 r = -ENOMEM;
 645                                                 goto finish;
 646                                         }
 647
 648                                         free(u->meta.description);
 649                                         u->meta.description = d;
 650                                 } else
 651                                         state = LSB;
 652                         }
 653                 }
 654         }
 655
 656         if ((r = sysv_exec_commands(s)) < 0)
 657                 goto finish;
 658
 659         if (!s->sysv_runlevels || chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 660                 /* If there a runlevels configured for this service
 661                  * but none of the standard ones, then we assume this
 662                  * is some special kind of service (which might be
 663                  * needed for early boot) and don't create any links
 664                  * to it. */
 665
 666                 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0 ||
 667                     (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
 668                         goto finish;
 669
 670         } else
 671                 /* Don't timeout special services during boot (like fsck) */
 672                 s->timeout_usec = 0;
 673
 674         /* Special setting for all SysV services */
 675         s->type = SERVICE_FORKING;
 676         s->valid_no_process = true;
 677         s->kill_mode = KILL_PROCESS_GROUP;
 678         s->restart = SERVICE_ONCE;
 679
 680         u->meta.load_state = UNIT_LOADED;
 681         r = 0;
 682
 683 finish:
 684
 685         if (f)
 686                 fclose(f);
 687
 688         return r;
 689 }
 690
 691 static int service_load_sysv_name(Service *s, const char *name) {
 692         char **p;
 693
 694         assert(s);
 695         assert(name);
 696
 697         /* For SysV services we strip the boot. or .sh
 698          * prefixes/suffixes. */
 699         if (startswith(name, "boot.") ||
 700             endswith(name, ".sh.service"))
 701                 return -ENOENT;
 702
 703         STRV_FOREACH(p, UNIT(s)->meta.manager->lookup_paths.sysvinit_path) {
 704                 char *path;
 705                 int r;
 706
 707                 if (asprintf(&path, "%s/%s", *p, name) < 0)
 708                         return -ENOMEM;
 709
 710                 assert(endswith(path, ".service"));
 711                 path[strlen(path)-8] = 0;
 712
 713                 r = service_load_sysv_path(s, path);
 714
 715                 if (r >= 0 && UNIT(s)->meta.load_state == UNIT_STUB) {
 716                         /* Try Debian style xxx.sh source'able init scripts */
 717                         strcat(path, ".sh");
 718                         r = service_load_sysv_path(s, path);
 719                 }
 720
 721                 free(path);
 722
 723                 if (r >= 0 && UNIT(s)->meta.load_state == UNIT_STUB) {
 724                         /* Try SUSE style boot.xxx init scripts */
 725
 726                         if (asprintf(&path, "%s/boot.%s", *p, name) < 0)
 727                                 return -ENOMEM;
 728
 729                         path[strlen(path)-8] = 0;
 730                         r = service_load_sysv_path(s, path);
 731                         free(path);
 732                 }
 733
 734                 if (r < 0)
 735                         return r;
 736
 737                 if ((UNIT(s)->meta.load_state != UNIT_STUB))
 738                         break;
 739         }
 740
 741         return 0;
 742 }
 743
 744 static int service_load_sysv(Service *s) {
 745         const char *t;
 746         Iterator i;
 747         int r;
 748
 749         assert(s);
 750
 751         /* Load service data from SysV init scripts, preferably with
 752          * LSB headers ... */
 753
 754         if (strv_isempty(UNIT(s)->meta.manager->lookup_paths.sysvinit_path))
 755                 return 0;
 756
 757         if ((t = UNIT(s)->meta.id))
 758                 if ((r = service_load_sysv_name(s, t)) < 0)
 759                         return r;
 760
 761         if (UNIT(s)->meta.load_state == UNIT_STUB)
 762                 SET_FOREACH(t, UNIT(s)->meta.names, i) {
 763                         if (t == UNIT(s)->meta.id)
 764                                 continue;
 765
 766                         if ((r == service_load_sysv_name(s, t)) < 0)
 767                                 return r;
 768
 769                         if (UNIT(s)->meta.load_state != UNIT_STUB)
 770                                 break;
 771                 }
 772
 773         return 0;
 774 }
 775
 776 static int service_add_bus_name(Service *s) {
 777         char *n;
 778         int r;
 779
 780         assert(s);
 781         assert(s->bus_name);
 782
 783         if (asprintf(&n, "dbus-%s.service", s->bus_name) < 0)
 784                 return 0;
 785
 786         r = unit_merge_by_name(UNIT(s), n);
 787         free(n);
 788
 789         return r;
 790 }
 791
 792 static int service_verify(Service *s) {
 793         assert(s);
 794
 795         if (UNIT(s)->meta.load_state != UNIT_LOADED)
 796                 return 0;
 797
 798         if (!s->exec_command[SERVICE_EXEC_START]) {
 799                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->meta.id);
 800                 return -EINVAL;
 801         }
 802
 803         if (s->type == SERVICE_DBUS && !s->bus_name) {
 804                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->meta.id);
 805                 return -EINVAL;
 806         }
 807
 808         return 0;
 809 }
 810
 811 static int service_load(Unit *u) {
 812         int r;
 813         Service *s = SERVICE(u);
 814
 815         assert(s);
 816
 817         /* Load a .service file */
 818         if ((r = unit_load_fragment(u)) < 0)
 819                 return r;
 820
 821         /* Load a classic init script as a fallback, if we couldn't find anything */
 822         if (u->meta.load_state == UNIT_STUB)
 823                 if ((r = service_load_sysv(s)) < 0)
 824                         return r;
 825
 826         /* Still nothing found? Then let's give up */
 827         if (u->meta.load_state == UNIT_STUB)
 828                 return -ENOENT;
 829
 830         /* We were able to load something, then let's add in the
 831          * dropin directories. */
 832         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
 833                 return r;
 834
 835         /* This is a new unit? Then let's add in some extras */
 836         if (u->meta.load_state == UNIT_LOADED) {
 837                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
 838                         return r;
 839
 840                 if ((r = unit_add_default_cgroup(u)) < 0)
 841                         return r;
 842
 843                 if ((r = sysv_fix_order(s)) < 0)
 844                         return r;
 845
 846                 if (s->bus_name) {
 847                         if ((r = service_add_bus_name(s)) < 0)
 848                                 return r;
 849
 850                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
 851                             return r;
 852                 }
 853         }
 854
 855         return service_verify(s);
 856 }
 857
 858 static void service_dump(Unit *u, FILE *f, const char *prefix) {
 859
 860         ServiceExecCommand c;
 861         Service *s = SERVICE(u);
 862         const char *prefix2;
 863         char *p2;
 864
 865         assert(s);
 866
 867         p2 = strappend(prefix, "\t");
 868         prefix2 = p2 ? p2 : prefix;
 869
 870         fprintf(f,
 871                 "%sService State: %s\n"
 872                 "%sPermissionsStartOnly: %s\n"
 873                 "%sRootDirectoryStartOnly: %s\n"
 874                 "%sValidNoProcess: %s\n"
 875                 "%sKillMode: %s\n"
 876                 "%sType: %s\n",
 877                 prefix, service_state_to_string(s->state),
 878                 prefix, yes_no(s->permissions_start_only),
 879                 prefix, yes_no(s->root_directory_start_only),
 880                 prefix, yes_no(s->valid_no_process),
 881                 prefix, kill_mode_to_string(s->kill_mode),
 882                 prefix, service_type_to_string(s->type));
 883
 884         if (s->control_pid > 0)
 885                 fprintf(f,
 886                         "%sControl PID: %llu\n",
 887                         prefix, (unsigned long long) s->control_pid);
 888
 889         if (s->main_pid > 0)
 890                 fprintf(f,
 891                         "%sMain PID: %llu\n",
 892                         prefix, (unsigned long long) s->main_pid);
 893
 894         if (s->pid_file)
 895                 fprintf(f,
 896                         "%sPIDFile: %s\n",
 897                         prefix, s->pid_file);
 898
 899         if (s->bus_name)
 900                 fprintf(f,
 901                         "%sBusName: %s\n"
 902                         "%sBus Name Good: %s\n",
 903                         prefix, s->bus_name,
 904                         prefix, yes_no(s->bus_name_good));
 905
 906         exec_context_dump(&s->exec_context, f, prefix);
 907
 908         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
 909
 910                 if (!s->exec_command[c])
 911                         continue;
 912
 913                 fprintf(f, "%s-> %s:\n",
 914                         prefix, service_exec_command_to_string(c));
 915
 916                 exec_command_dump_list(s->exec_command[c], f, prefix2);
 917         }
 918
 919         if (s->sysv_path)
 920                 fprintf(f,
 921                         "%sSysV Init Script Path: %s\n"
 922                         "%sSysV Init Script has LSB Header: %s\n",
 923                         prefix, s->sysv_path,
 924                         prefix, yes_no(s->sysv_has_lsb));
 925
 926         if (s->sysv_start_priority >= 0)
 927                 fprintf(f,
 928                         "%sSysVStartPriority: %i\n",
 929                         prefix, s->sysv_start_priority);
 930
 931         if (s->sysv_runlevels)
 932                 fprintf(f, "%sSysVRunLevels: %s\n",
 933                         prefix, s->sysv_runlevels);
 934
 935         if (s->status_text)
 936                 fprintf(f, "%sStatus Text: %s\n",
 937                         prefix, s->status_text);
 938
 939         free(p2);
 940 }
 941
 942 static int service_load_pid_file(Service *s) {
 943         char *k;
 944         int r;
 945         pid_t pid;
 946
 947         assert(s);
 948
 949         if (s->main_pid_known)
 950                 return 0;
 951
 952         assert(s->main_pid <= 0);
 953
 954         if (!s->pid_file)
 955                 return -ENOENT;
 956
 957         if ((r = read_one_line_file(s->pid_file, &k)) < 0)
 958                 return r;
 959
 960         r = parse_pid(k, &pid);
 961         free(k);
 962
 963         if (r < 0)
 964                 return r;
 965
 966         if (kill(pid, 0) < 0 && errno != EPERM) {
 967                 log_warning("PID %lu read from file %s does not exist. Your service or init script might be broken.",
 968                             (unsigned long) pid, s->pid_file);
 969                 return -ESRCH;
 970         }
 971
 972         if ((r = service_set_main_pid(s, pid)) < 0)
 973                 return r;
 974
 975         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
 976                 /* FIXME: we need to do something here */
 977                 return r;
 978
 979         return 0;
 980 }
 981
 982 static int service_get_sockets(Service *s, Set **_set) {
 983         Set *set;
 984         Iterator i;
 985         char *t;
 986         int r;
 987
 988         assert(s);
 989         assert(_set);
 990
 991         /* Collects all Socket objects that belong to this
 992          * service. Note that a service might have multiple sockets
 993          * via multiple names. */
 994
 995         if (!(set = set_new(NULL, NULL)))
 996                 return -ENOMEM;
 997
 998         SET_FOREACH(t, UNIT(s)->meta.names, i) {
 999                 char *k;
1000                 Unit *p;
1001
1002                 /* Look for all socket objects that go by any of our
1003                  * units and collect their fds */
1004
1005                 if (!(k = unit_name_change_suffix(t, ".socket"))) {
1006                         r = -ENOMEM;
1007                         goto fail;
1008                 }
1009
1010                 p = manager_get_unit(UNIT(s)->meta.manager, k);
1011                 free(k);
1012
1013                 if (!p)
1014                         continue;
1015
1016                 if ((r = set_put(set, p)) < 0)
1017                         goto fail;
1018         }
1019
1020         *_set = set;
1021         return 0;
1022
1023 fail:
1024         set_free(set);
1025         return r;
1026 }
1027
1028 static int service_notify_sockets_dead(Service *s) {
1029         Iterator i;
1030         Set *set;
1031         Socket *sock;
1032         int r;
1033
1034         assert(s);
1035
1036         /* Notifies all our sockets when we die */
1037         if ((r = service_get_sockets(s, &set)) < 0)
1038                 return r;
1039
1040         SET_FOREACH(sock, set, i)
1041                 socket_notify_service_dead(sock);
1042
1043         set_free(set);
1044
1045         return 0;
1046 }
1047
1048 static void service_set_state(Service *s, ServiceState state) {
1049         ServiceState old_state;
1050         assert(s);
1051
1052         old_state = s->state;
1053         s->state = state;
1054
1055         if (state != SERVICE_START_PRE &&
1056             state != SERVICE_START &&
1057             state != SERVICE_START_POST &&
1058             state != SERVICE_RELOAD &&
1059             state != SERVICE_STOP &&
1060             state != SERVICE_STOP_SIGTERM &&
1061             state != SERVICE_STOP_SIGKILL &&
1062             state != SERVICE_STOP_POST &&
1063             state != SERVICE_FINAL_SIGTERM &&
1064             state != SERVICE_FINAL_SIGKILL &&
1065             state != SERVICE_AUTO_RESTART)
1066                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1067
1068         if (state != SERVICE_START &&
1069             state != SERVICE_START_POST &&
1070             state != SERVICE_RUNNING &&
1071             state != SERVICE_RELOAD &&
1072             state != SERVICE_STOP &&
1073             state != SERVICE_STOP_SIGTERM &&
1074             state != SERVICE_STOP_SIGKILL)
1075                 service_unwatch_main_pid(s);
1076
1077         if (state != SERVICE_START_PRE &&
1078             state != SERVICE_START &&
1079             state != SERVICE_START_POST &&
1080             state != SERVICE_RELOAD &&
1081             state != SERVICE_STOP &&
1082             state != SERVICE_STOP_SIGTERM &&
1083             state != SERVICE_STOP_SIGKILL &&
1084             state != SERVICE_STOP_POST &&
1085             state != SERVICE_FINAL_SIGTERM &&
1086             state != SERVICE_FINAL_SIGKILL) {
1087                 service_unwatch_control_pid(s);
1088                 s->control_command = NULL;
1089                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1090         }
1091
1092         if (state == SERVICE_DEAD ||
1093             state == SERVICE_STOP ||
1094             state == SERVICE_STOP_SIGTERM ||
1095             state == SERVICE_STOP_SIGKILL ||
1096             state == SERVICE_STOP_POST ||
1097             state == SERVICE_FINAL_SIGTERM ||
1098             state == SERVICE_FINAL_SIGKILL ||
1099             state == SERVICE_MAINTENANCE ||
1100             state == SERVICE_AUTO_RESTART)
1101                 service_notify_sockets_dead(s);
1102
1103         if (state != SERVICE_START_PRE &&
1104             state != SERVICE_START &&
1105             !(state == SERVICE_DEAD && UNIT(s)->meta.job))
1106                 service_close_socket_fd(s);
1107
1108         if (old_state != state)
1109                 log_debug("%s changed %s -> %s", UNIT(s)->meta.id, service_state_to_string(old_state), service_state_to_string(state));
1110
1111         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1112 }
1113
1114 static int service_coldplug(Unit *u) {
1115         Service *s = SERVICE(u);
1116         int r;
1117
1118         assert(s);
1119         assert(s->state == SERVICE_DEAD);
1120
1121         if (s->deserialized_state != s->state) {
1122
1123                 if (s->deserialized_state == SERVICE_START_PRE ||
1124                     s->deserialized_state == SERVICE_START ||
1125                     s->deserialized_state == SERVICE_START_POST ||
1126                     s->deserialized_state == SERVICE_RELOAD ||
1127                     s->deserialized_state == SERVICE_STOP ||
1128                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1129                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1130                     s->deserialized_state == SERVICE_STOP_POST ||
1131                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1132                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1133                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1134
1135                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1136                                 usec_t k;
1137
1138                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1139
1140                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1141                                         return r;
1142                         }
1143                 }
1144
1145                 if ((s->deserialized_state == SERVICE_START &&
1146                      (s->type == SERVICE_FORKING ||
1147                       s->type == SERVICE_DBUS ||
1148                       s->type == SERVICE_FINISH ||
1149                       s->type == SERVICE_NOTIFY)) ||
1150                     s->deserialized_state == SERVICE_START_POST ||
1151                     s->deserialized_state == SERVICE_RUNNING ||
1152                     s->deserialized_state == SERVICE_RELOAD ||
1153                     s->deserialized_state == SERVICE_STOP ||
1154                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1155                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1156                         if (s->main_pid > 0)
1157                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1158                                         return r;
1159
1160                 if (s->deserialized_state == SERVICE_START_PRE ||
1161                     s->deserialized_state == SERVICE_START ||
1162                     s->deserialized_state == SERVICE_START_POST ||
1163                     s->deserialized_state == SERVICE_RELOAD ||
1164                     s->deserialized_state == SERVICE_STOP ||
1165                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1166                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1167                     s->deserialized_state == SERVICE_STOP_POST ||
1168                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1169                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1170                         if (s->control_pid > 0)
1171                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1172                                         return r;
1173
1174                 service_set_state(s, s->deserialized_state);
1175         }
1176
1177         return 0;
1178 }
1179
1180 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1181         Iterator i;
1182         int r;
1183         int *rfds = NULL;
1184         unsigned rn_fds = 0;
1185         Set *set;
1186         Socket *sock;
1187
1188         assert(s);
1189         assert(fds);
1190         assert(n_fds);
1191
1192         if ((r = service_get_sockets(s, &set)) < 0)
1193                 return r;
1194
1195         SET_FOREACH(sock, set, i) {
1196                 int *cfds;
1197                 unsigned cn_fds;
1198
1199                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1200                         goto fail;
1201
1202                 if (!cfds)
1203                         continue;
1204
1205                 if (!rfds) {
1206                         rfds = cfds;
1207                         rn_fds = cn_fds;
1208                 } else {
1209                         int *t;
1210
1211                         if (!(t = new(int, rn_fds+cn_fds))) {
1212                                 free(cfds);
1213                                 r = -ENOMEM;
1214                                 goto fail;
1215                         }
1216
1217                         memcpy(t, rfds, rn_fds);
1218                         memcpy(t+rn_fds, cfds, cn_fds);
1219                         free(rfds);
1220                         free(cfds);
1221
1222                         rfds = t;
1223                         rn_fds = rn_fds+cn_fds;
1224                 }
1225         }
1226
1227         *fds = rfds;
1228         *n_fds = rn_fds;
1229
1230         set_free(set);
1231
1232         return 0;
1233
1234 fail:
1235         set_free(set);
1236         free(rfds);
1237
1238         return r;
1239 }
1240
1241 static int service_spawn(
1242                 Service *s,
1243                 ExecCommand *c,
1244                 bool timeout,
1245                 bool pass_fds,
1246                 bool apply_permissions,
1247                 bool apply_chroot,
1248                 pid_t *_pid) {
1249
1250         pid_t pid;
1251         int r;
1252         int *fds = NULL;
1253         unsigned n_fds = 0;
1254         char **argv;
1255
1256         assert(s);
1257         assert(c);
1258         assert(_pid);
1259
1260         if (pass_fds) {
1261                 if (s->socket_fd >= 0) {
1262                         fds = &s->socket_fd;
1263                         n_fds = 1;
1264                 } else if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1265                         goto fail;
1266         }
1267
1268         if (timeout && s->timeout_usec) {
1269                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1270                         goto fail;
1271         } else
1272                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1273
1274         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1275                 r = -ENOMEM;
1276                 goto fail;
1277         }
1278
1279         r = exec_spawn(c,
1280                        argv,
1281                        &s->exec_context,
1282                        fds, n_fds,
1283                        s->meta.manager->environment,
1284                        apply_permissions,
1285                        apply_chroot,
1286                        UNIT(s)->meta.manager->confirm_spawn,
1287                        UNIT(s)->meta.cgroup_bondings,
1288                        &pid);
1289
1290         strv_free(argv);
1291         if (r < 0)
1292                 goto fail;
1293
1294         if (fds) {
1295                 if (s->socket_fd >= 0)
1296                         service_close_socket_fd(s);
1297                 else
1298                         free(fds);
1299         }
1300
1301         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1302                 /* FIXME: we need to do something here */
1303                 goto fail;
1304
1305         *_pid = pid;
1306
1307         return 0;
1308
1309 fail:
1310         free(fds);
1311
1312         if (timeout)
1313                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1314
1315         return r;
1316 }
1317
1318 static int main_pid_good(Service *s) {
1319         assert(s);
1320
1321         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1322          * don't know */
1323
1324         /* If we know the pid file, then lets just check if it is
1325          * still valid */
1326         if (s->main_pid_known)
1327                 return s->main_pid > 0;
1328
1329         /* We don't know the pid */
1330         return -EAGAIN;
1331 }
1332
1333 static int control_pid_good(Service *s) {
1334         assert(s);
1335
1336         return s->control_pid > 0;
1337 }
1338
1339 static int cgroup_good(Service *s) {
1340         int r;
1341
1342         assert(s);
1343
1344         if (s->valid_no_process)
1345                 return -EAGAIN;
1346
1347         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings)) < 0)
1348                 return r;
1349
1350         return !r;
1351 }
1352
1353 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1354         int r;
1355         assert(s);
1356
1357         if (!success)
1358                 s->failure = true;
1359
1360         if (allow_restart &&
1361             s->allow_restart &&
1362             (s->restart == SERVICE_RESTART_ALWAYS ||
1363              (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1364
1365                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1366                         goto fail;
1367
1368                 service_set_state(s, SERVICE_AUTO_RESTART);
1369         } else
1370                 service_set_state(s, s->failure ? SERVICE_MAINTENANCE : SERVICE_DEAD);
1371
1372         return;
1373
1374 fail:
1375         log_warning("%s failed to run install restart timer: %s", UNIT(s)->meta.id, strerror(-r));
1376         service_enter_dead(s, false, false);
1377 }
1378
1379 static void service_enter_signal(Service *s, ServiceState state, bool success);
1380
1381 static void service_enter_stop_post(Service *s, bool success) {
1382         int r;
1383         assert(s);
1384
1385         if (!success)
1386                 s->failure = true;
1387
1388         service_unwatch_control_pid(s);
1389
1390         s->control_command_id = SERVICE_EXEC_STOP_POST;
1391         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
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
1402                 service_set_state(s, SERVICE_STOP_POST);
1403         } else
1404                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, true);
1405
1406         return;
1407
1408 fail:
1409         log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->meta.id, strerror(-r));
1410         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1411 }
1412
1413 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1414         int r;
1415         bool sent = false;
1416
1417         assert(s);
1418
1419         if (!success)
1420                 s->failure = true;
1421
1422         if (s->kill_mode != KILL_NONE) {
1423                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1424
1425                 if (s->kill_mode == KILL_CONTROL_GROUP) {
1426
1427                         if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1428                                 if (r != -EAGAIN && r != -ESRCH)
1429                                         goto fail;
1430                         } else
1431                                 sent = true;
1432                 }
1433
1434                 if (!sent) {
1435                         r = 0;
1436
1437                         if (s->main_pid > 0) {
1438                                 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1439                                         r = -errno;
1440                                 else
1441                                         sent = true;
1442                         }
1443
1444                         if (s->control_pid > 0) {
1445                                 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1446                                         r = -errno;
1447                                 else
1448                                         sent = true;
1449                         }
1450
1451                         if (r < 0)
1452                                 goto fail;
1453                 }
1454         }
1455
1456         if (sent && (s->main_pid > 0 || s->control_pid > 0)) {
1457                 if (s->timeout_usec > 0)
1458                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1459                                 goto fail;
1460
1461                 service_set_state(s, state);
1462         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1463                 service_enter_stop_post(s, true);
1464         else
1465                 service_enter_dead(s, true, true);
1466
1467         return;
1468
1469 fail:
1470         log_warning("%s failed to kill processes: %s", UNIT(s)->meta.id, strerror(-r));
1471
1472         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1473                 service_enter_stop_post(s, false);
1474         else
1475                 service_enter_dead(s, false, true);
1476 }
1477
1478 static void service_enter_stop(Service *s, bool success) {
1479         int r;
1480
1481         assert(s);
1482
1483         if (!success)
1484                 s->failure = true;
1485
1486         service_unwatch_control_pid(s);
1487
1488         s->control_command_id = SERVICE_EXEC_STOP;
1489         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
1490                 if ((r = service_spawn(s,
1491                                        s->control_command,
1492                                        true,
1493                                        false,
1494                                        !s->permissions_start_only,
1495                                        !s->root_directory_start_only,
1496                                        &s->control_pid)) < 0)
1497                         goto fail;
1498
1499                 service_set_state(s, SERVICE_STOP);
1500         } else
1501                 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1502
1503         return;
1504
1505 fail:
1506         log_warning("%s failed to run 'stop' task: %s", UNIT(s)->meta.id, strerror(-r));
1507         service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1508 }
1509
1510 static void service_enter_running(Service *s, bool success) {
1511         assert(s);
1512
1513         if (!success)
1514                 s->failure = true;
1515
1516         if (main_pid_good(s) != 0 &&
1517             cgroup_good(s) != 0 &&
1518             (s->bus_name_good || s->type != SERVICE_DBUS))
1519                 service_set_state(s, SERVICE_RUNNING);
1520         else if (s->valid_no_process)
1521                 service_set_state(s, SERVICE_EXITED);
1522         else
1523                 service_enter_stop(s, true);
1524 }
1525
1526 static void service_enter_start_post(Service *s) {
1527         int r;
1528         assert(s);
1529
1530         service_unwatch_control_pid(s);
1531
1532         s->control_command_id = SERVICE_EXEC_START_POST;
1533         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
1534                 if ((r = service_spawn(s,
1535                                        s->control_command,
1536                                        true,
1537                                        false,
1538                                        !s->permissions_start_only,
1539                                        !s->root_directory_start_only,
1540                                        &s->control_pid)) < 0)
1541                         goto fail;
1542
1543                 service_set_state(s, SERVICE_START_POST);
1544         } else
1545                 service_enter_running(s, true);
1546
1547         return;
1548
1549 fail:
1550         log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->meta.id, strerror(-r));
1551         service_enter_stop(s, false);
1552 }
1553
1554 static void service_enter_start(Service *s) {
1555         pid_t pid;
1556         int r;
1557
1558         assert(s);
1559
1560         assert(s->exec_command[SERVICE_EXEC_START]);
1561         assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1562
1563         if (s->type == SERVICE_FORKING)
1564                 service_unwatch_control_pid(s);
1565         else
1566                 service_unwatch_main_pid(s);
1567
1568         if ((r = service_spawn(s,
1569                                s->exec_command[SERVICE_EXEC_START],
1570                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
1571                                true,
1572                                true,
1573                                true,
1574                                &pid)) < 0)
1575                 goto fail;
1576
1577         if (s->type == SERVICE_SIMPLE) {
1578                 /* For simple services we immediately start
1579                  * the START_POST binaries. */
1580
1581                 service_set_main_pid(s, pid);
1582                 service_enter_start_post(s);
1583
1584         } else  if (s->type == SERVICE_FORKING) {
1585
1586                 /* For forking services we wait until the start
1587                  * process exited. */
1588
1589                 s->control_command_id = SERVICE_EXEC_START;
1590                 s->control_command = s->exec_command[SERVICE_EXEC_START];
1591
1592                 s->control_pid = pid;
1593                 service_set_state(s, SERVICE_START);
1594
1595         } else if (s->type == SERVICE_FINISH ||
1596                    s->type == SERVICE_DBUS ||
1597                    s->type == SERVICE_NOTIFY) {
1598
1599                 /* For finishing services we wait until the start
1600                  * process exited, too, but it is our main process. */
1601
1602                 /* For D-Bus services we know the main pid right away,
1603                  * but wait for the bus name to appear on the
1604                  * bus. Notify services are similar. */
1605
1606                 service_set_main_pid(s, pid);
1607                 service_set_state(s, SERVICE_START);
1608         } else
1609                 assert_not_reached("Unknown service type");
1610
1611         return;
1612
1613 fail:
1614         log_warning("%s failed to run 'start' task: %s", UNIT(s)->meta.id, strerror(-r));
1615         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1616 }
1617
1618 static void service_enter_start_pre(Service *s) {
1619         int r;
1620
1621         assert(s);
1622
1623         service_unwatch_control_pid(s);
1624
1625         s->control_command_id = SERVICE_EXEC_START_PRE;
1626         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
1627                 if ((r = service_spawn(s,
1628                                        s->control_command,
1629                                        true,
1630                                        false,
1631                                        !s->permissions_start_only,
1632                                        !s->root_directory_start_only,
1633                                        &s->control_pid)) < 0)
1634                         goto fail;
1635
1636                 service_set_state(s, SERVICE_START_PRE);
1637         } else
1638                 service_enter_start(s);
1639
1640         return;
1641
1642 fail:
1643         log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->meta.id, strerror(-r));
1644         service_enter_dead(s, false, true);
1645 }
1646
1647 static void service_enter_restart(Service *s) {
1648         int r;
1649         assert(s);
1650
1651         service_enter_dead(s, true, false);
1652
1653         if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1654                 goto fail;
1655
1656         log_debug("%s scheduled restart job.", UNIT(s)->meta.id);
1657         return;
1658
1659 fail:
1660
1661         log_warning("%s failed to schedule restart job: %s", UNIT(s)->meta.id, strerror(-r));
1662         service_enter_dead(s, false, false);
1663 }
1664
1665 static void service_enter_reload(Service *s) {
1666         int r;
1667
1668         assert(s);
1669
1670         service_unwatch_control_pid(s);
1671
1672         s->control_command_id = SERVICE_EXEC_RELOAD;
1673         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
1674                 if ((r = service_spawn(s,
1675                                        s->control_command,
1676                                        true,
1677                                        false,
1678                                        !s->permissions_start_only,
1679                                        !s->root_directory_start_only,
1680                                        &s->control_pid)) < 0)
1681                         goto fail;
1682
1683                 service_set_state(s, SERVICE_RELOAD);
1684         } else
1685                 service_enter_running(s, true);
1686
1687         return;
1688
1689 fail:
1690         log_warning("%s failed to run 'reload' task: %s", UNIT(s)->meta.id, strerror(-r));
1691         service_enter_stop(s, false);
1692 }
1693
1694 static void service_run_next(Service *s, bool success) {
1695         int r;
1696
1697         assert(s);
1698         assert(s->control_command);
1699         assert(s->control_command->command_next);
1700
1701         if (!success)
1702                 s->failure = true;
1703
1704         s->control_command = s->control_command->command_next;
1705
1706         service_unwatch_control_pid(s);
1707
1708         if ((r = service_spawn(s,
1709                                s->control_command,
1710                                true,
1711                                false,
1712                                !s->permissions_start_only,
1713                                !s->root_directory_start_only,
1714                                &s->control_pid)) < 0)
1715                 goto fail;
1716
1717         return;
1718
1719 fail:
1720         log_warning("%s failed to run spawn next task: %s", UNIT(s)->meta.id, strerror(-r));
1721
1722         if (s->state == SERVICE_START_PRE)
1723                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1724         else if (s->state == SERVICE_STOP)
1725                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1726         else if (s->state == SERVICE_STOP_POST)
1727                 service_enter_dead(s, false, true);
1728         else
1729                 service_enter_stop(s, false);
1730 }
1731
1732 static int service_start(Unit *u) {
1733         Service *s = SERVICE(u);
1734
1735         assert(s);
1736
1737         /* We cannot fulfill this request right now, try again later
1738          * please! */
1739         if (s->state == SERVICE_STOP ||
1740             s->state == SERVICE_STOP_SIGTERM ||
1741             s->state == SERVICE_STOP_SIGKILL ||
1742             s->state == SERVICE_STOP_POST ||
1743             s->state == SERVICE_FINAL_SIGTERM ||
1744             s->state == SERVICE_FINAL_SIGKILL)
1745                 return -EAGAIN;
1746
1747         /* Already on it! */
1748         if (s->state == SERVICE_START_PRE ||
1749             s->state == SERVICE_START ||
1750             s->state == SERVICE_START_POST)
1751                 return 0;
1752
1753         assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTENANCE || s->state == SERVICE_AUTO_RESTART);
1754
1755         /* Make sure we don't enter a busy loop of some kind. */
1756         if (!ratelimit_test(&s->ratelimit)) {
1757                 log_warning("%s start request repeated too quickly, refusing to start.", u->meta.id);
1758                 return -ECANCELED;
1759         }
1760
1761         s->failure = false;
1762         s->main_pid_known = false;
1763         s->allow_restart = true;
1764
1765         service_enter_start_pre(s);
1766         return 0;
1767 }
1768
1769 static int service_stop(Unit *u) {
1770         Service *s = SERVICE(u);
1771
1772         assert(s);
1773
1774         /* Cannot do this now */
1775         if (s->state == SERVICE_START_PRE ||
1776             s->state == SERVICE_START ||
1777             s->state == SERVICE_START_POST ||
1778             s->state == SERVICE_RELOAD)
1779                 return -EAGAIN;
1780
1781         /* Already on it */
1782         if (s->state == SERVICE_STOP ||
1783             s->state == SERVICE_STOP_SIGTERM ||
1784             s->state == SERVICE_STOP_SIGKILL ||
1785             s->state == SERVICE_STOP_POST ||
1786             s->state == SERVICE_FINAL_SIGTERM ||
1787             s->state == SERVICE_FINAL_SIGKILL)
1788                 return 0;
1789
1790         if (s->state == SERVICE_AUTO_RESTART) {
1791                 service_set_state(s, SERVICE_DEAD);
1792                 return 0;
1793         }
1794
1795         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1796
1797         /* This is a user request, so don't do restarts on this
1798          * shutdown. */
1799         s->allow_restart = false;
1800
1801         service_enter_stop(s, true);
1802         return 0;
1803 }
1804
1805 static int service_reload(Unit *u) {
1806         Service *s = SERVICE(u);
1807
1808         assert(s);
1809
1810         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
1811
1812         service_enter_reload(s);
1813         return 0;
1814 }
1815
1816 static bool service_can_reload(Unit *u) {
1817         Service *s = SERVICE(u);
1818
1819         assert(s);
1820
1821         return !!s->exec_command[SERVICE_EXEC_RELOAD];
1822 }
1823
1824 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
1825         Service *s = SERVICE(u);
1826
1827         assert(u);
1828         assert(f);
1829         assert(fds);
1830
1831         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
1832         unit_serialize_item(u, f, "failure", yes_no(s->failure));
1833
1834         if (s->control_pid > 0)
1835                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
1836
1837         if (s->main_pid_known && s->main_pid > 0)
1838                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
1839
1840         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
1841
1842         /* There's a minor uncleanliness here: if there are multiple
1843          * commands attached here, we will start from the first one
1844          * again */
1845         if (s->control_command_id >= 0)
1846                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
1847
1848         if (s->socket_fd >= 0) {
1849                 int copy;
1850
1851                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
1852                         return copy;
1853
1854                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
1855         }
1856
1857         return 0;
1858 }
1859
1860 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
1861         Service *s = SERVICE(u);
1862         int r;
1863
1864         assert(u);
1865         assert(key);
1866         assert(value);
1867         assert(fds);
1868
1869         if (streq(key, "state")) {
1870                 ServiceState state;
1871
1872                 if ((state = service_state_from_string(value)) < 0)
1873                         log_debug("Failed to parse state value %s", value);
1874                 else
1875                         s->deserialized_state = state;
1876         } else if (streq(key, "failure")) {
1877                 int b;
1878
1879                 if ((b = parse_boolean(value)) < 0)
1880                         log_debug("Failed to parse failure value %s", value);
1881                 else
1882                         s->failure = b || s->failure;
1883         } else if (streq(key, "control-pid")) {
1884                 pid_t pid;
1885
1886                 if ((r = parse_pid(value, &pid)) < 0)
1887                         log_debug("Failed to parse control-pid value %s", value);
1888                 else
1889                         s->control_pid = pid;
1890         } else if (streq(key, "main-pid")) {
1891                 pid_t pid;
1892
1893                 if ((r = parse_pid(value, &pid)) < 0)
1894                         log_debug("Failed to parse main-pid value %s", value);
1895                 else
1896                         service_set_main_pid(s, (pid_t) pid);
1897         } else if (streq(key, "main-pid-known")) {
1898                 int b;
1899
1900                 if ((b = parse_boolean(value)) < 0)
1901                         log_debug("Failed to parse main-pid-known value %s", value);
1902                 else
1903                         s->main_pid_known = b;
1904         } else if (streq(key, "control-command")) {
1905                 ServiceExecCommand id;
1906
1907                 if ((id = service_exec_command_from_string(value)) < 0)
1908                         log_debug("Failed to parse exec-command value %s", value);
1909                 else {
1910                         s->control_command_id = id;
1911                         s->control_command = s->exec_command[id];
1912                 }
1913         } else if (streq(key, "socket-fd")) {
1914                 int fd;
1915
1916                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
1917                         log_debug("Failed to parse socket-fd value %s", value);
1918                 else {
1919
1920                         if (s->socket_fd >= 0)
1921                                 close_nointr_nofail(s->socket_fd);
1922                         s->socket_fd = fdset_remove(fds, fd);
1923                 }
1924         } else
1925                 log_debug("Unknown serialization key '%s'", key);
1926
1927         return 0;
1928 }
1929
1930 static UnitActiveState service_active_state(Unit *u) {
1931         assert(u);
1932
1933         return state_translation_table[SERVICE(u)->state];
1934 }
1935
1936 static const char *service_sub_state_to_string(Unit *u) {
1937         assert(u);
1938
1939         return service_state_to_string(SERVICE(u)->state);
1940 }
1941
1942 static bool service_check_gc(Unit *u) {
1943         Service *s = SERVICE(u);
1944
1945         assert(s);
1946
1947         return !!s->sysv_path;
1948 }
1949
1950 static bool service_check_snapshot(Unit *u) {
1951         Service *s = SERVICE(u);
1952
1953         assert(s);
1954
1955         return !s->got_socket_fd;
1956 }
1957
1958 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1959         Service *s = SERVICE(u);
1960         bool success;
1961
1962         assert(s);
1963         assert(pid >= 0);
1964
1965         success = is_clean_exit(code, status);
1966         s->failure = s->failure || !success;
1967
1968         if (s->main_pid == pid) {
1969
1970                 exec_status_fill(&s->main_exec_status, pid, code, status);
1971                 s->main_pid = 0;
1972
1973                 if (s->type != SERVICE_FORKING) {
1974                         assert(s->exec_command[SERVICE_EXEC_START]);
1975                         s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1976                 }
1977
1978                 log_debug("%s: main process exited, code=%s, status=%i", u->meta.id, sigchld_code_to_string(code), status);
1979
1980                 /* The service exited, so the service is officially
1981                  * gone. */
1982
1983                 switch (s->state) {
1984
1985                 case SERVICE_START_POST:
1986                 case SERVICE_RELOAD:
1987                 case SERVICE_STOP:
1988                         /* Need to wait until the operation is
1989                          * done */
1990                         break;
1991
1992                 case SERVICE_START:
1993                         if (s->type == SERVICE_FINISH) {
1994                                 /* This was our main goal, so let's go on */
1995                                 if (success)
1996                                         service_enter_start_post(s);
1997                                 else
1998                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1999                                 break;
2000                         } else {
2001                                 assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2002
2003                                 /* Fall through */
2004                         }
2005
2006                 case SERVICE_RUNNING:
2007                         service_enter_running(s, success);
2008                         break;
2009
2010                 case SERVICE_STOP_SIGTERM:
2011                 case SERVICE_STOP_SIGKILL:
2012
2013                         if (!control_pid_good(s))
2014                                 service_enter_stop_post(s, success);
2015
2016                         /* If there is still a control process, wait for that first */
2017                         break;
2018
2019                 default:
2020                         assert_not_reached("Uh, main process died at wrong time.");
2021                 }
2022
2023         } else if (s->control_pid == pid) {
2024
2025                 if (s->control_command)
2026                         exec_status_fill(&s->control_command->exec_status, pid, code, status);
2027
2028                 s->control_pid = 0;
2029
2030                 log_debug("%s: control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
2031
2032                 /* If we are shutting things down anyway we
2033                  * don't care about failing commands. */
2034
2035                 if (s->control_command && s->control_command->command_next && success) {
2036
2037                         /* There is another command to *
2038                          * execute, so let's do that. */
2039
2040                         log_debug("%s running next command for state %s", u->meta.id, service_state_to_string(s->state));
2041                         service_run_next(s, success);
2042
2043                 } else {
2044                         /* No further commands for this step, so let's
2045                          * figure out what to do next */
2046
2047                         s->control_command = NULL;
2048                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2049
2050                         log_debug("%s got final SIGCHLD for state %s", u->meta.id, service_state_to_string(s->state));
2051
2052                         switch (s->state) {
2053
2054                         case SERVICE_START_PRE:
2055                                 if (success)
2056                                         service_enter_start(s);
2057                                 else
2058                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2059                                 break;
2060
2061                         case SERVICE_START:
2062                                 assert(s->type == SERVICE_FORKING);
2063
2064                                 /* Let's try to load the pid
2065                                  * file here if we can. We
2066                                  * ignore the return value,
2067                                  * since the PID file might
2068                                  * actually be created by a
2069                                  * START_POST script */
2070
2071                                 if (success) {
2072                                         if (s->pid_file)
2073                                                 service_load_pid_file(s);
2074
2075                                         service_enter_start_post(s);
2076                                 } else
2077                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2078
2079                                 break;
2080
2081                         case SERVICE_START_POST:
2082                                 if (success && s->pid_file && !s->main_pid_known) {
2083                                         int r;
2084
2085                                         /* Hmm, let's see if we can
2086                                          * load the pid now after the
2087                                          * start-post scripts got
2088                                          * executed. */
2089
2090                                         if ((r = service_load_pid_file(s)) < 0)
2091                                                 log_warning("%s: failed to load PID file %s: %s", UNIT(s)->meta.id, s->pid_file, strerror(-r));
2092                                 }
2093
2094                                 /* Fall through */
2095
2096                         case SERVICE_RELOAD:
2097                                 if (success)
2098                                         service_enter_running(s, true);
2099                                 else
2100                                         service_enter_stop(s, false);
2101
2102                                 break;
2103
2104                         case SERVICE_STOP:
2105                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
2106                                 break;
2107
2108                         case SERVICE_STOP_SIGTERM:
2109                         case SERVICE_STOP_SIGKILL:
2110                                 if (main_pid_good(s) <= 0)
2111                                         service_enter_stop_post(s, success);
2112
2113                                 /* If there is still a service
2114                                  * process around, wait until
2115                                  * that one quit, too */
2116                                 break;
2117
2118                         case SERVICE_STOP_POST:
2119                         case SERVICE_FINAL_SIGTERM:
2120                         case SERVICE_FINAL_SIGKILL:
2121                                 service_enter_dead(s, success, true);
2122                                 break;
2123
2124                         default:
2125                                 assert_not_reached("Uh, control process died at wrong time.");
2126                         }
2127                 }
2128         }
2129 }
2130
2131 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
2132         Service *s = SERVICE(u);
2133
2134         assert(s);
2135         assert(elapsed == 1);
2136
2137         assert(w == &s->timer_watch);
2138
2139         switch (s->state) {
2140
2141         case SERVICE_START_PRE:
2142         case SERVICE_START:
2143                 log_warning("%s operation timed out. Terminating.", u->meta.id);
2144                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2145                 break;
2146
2147         case SERVICE_START_POST:
2148         case SERVICE_RELOAD:
2149                 log_warning("%s operation timed out. Stopping.", u->meta.id);
2150                 service_enter_stop(s, false);
2151                 break;
2152
2153         case SERVICE_STOP:
2154                 log_warning("%s stopping timed out. Terminating.", u->meta.id);
2155                 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
2156                 break;
2157
2158         case SERVICE_STOP_SIGTERM:
2159                 log_warning("%s stopping timed out. Killing.", u->meta.id);
2160                 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
2161                 break;
2162
2163         case SERVICE_STOP_SIGKILL:
2164                 /* Uh, wie sent a SIGKILL and it is still not gone?
2165                  * Must be something we cannot kill, so let's just be
2166                  * weirded out and continue */
2167
2168                 log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
2169                 service_enter_stop_post(s, false);
2170                 break;
2171
2172         case SERVICE_STOP_POST:
2173                 log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
2174                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
2175                 break;
2176
2177         case SERVICE_FINAL_SIGTERM:
2178                 log_warning("%s stopping timed out (2). Killing.", u->meta.id);
2179                 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
2180                 break;
2181
2182         case SERVICE_FINAL_SIGKILL:
2183                 log_warning("%s still around after SIGKILL (2). Entering maintenance mode.", u->meta.id);
2184                 service_enter_dead(s, false, true);
2185                 break;
2186
2187         case SERVICE_AUTO_RESTART:
2188                 log_debug("%s holdoff time over, scheduling restart.", u->meta.id);
2189                 service_enter_restart(s);
2190                 break;
2191
2192         default:
2193                 assert_not_reached("Timeout at wrong time.");
2194         }
2195 }
2196
2197 static void service_cgroup_notify_event(Unit *u) {
2198         Service *s = SERVICE(u);
2199
2200         assert(u);
2201
2202         log_debug("%s: cgroup is empty", u->meta.id);
2203
2204         switch (s->state) {
2205
2206                 /* Waiting for SIGCHLD is usually more interesting,
2207                  * because it includes return codes/signals. Which is
2208                  * why we ignore the cgroup events for most cases,
2209                  * except when we don't know pid which to expect the
2210                  * SIGCHLD for. */
2211
2212         case SERVICE_RUNNING:
2213                 service_enter_running(s, true);
2214                 break;
2215
2216         default:
2217                 ;
2218         }
2219 }
2220
2221 static void service_notify_message(Unit *u, char **tags) {
2222         Service *s = SERVICE(u);
2223         const char *e;
2224
2225         assert(u);
2226
2227         log_debug("%s: Got message", u->meta.id);
2228
2229         /* Interpret MAINPID= */
2230         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
2231             (s->state == SERVICE_START ||
2232              s->state == SERVICE_START_POST ||
2233              s->state == SERVICE_RUNNING ||
2234              s->state == SERVICE_RELOAD)) {
2235                 pid_t pid;
2236
2237                 if (parse_pid(e + 8, &pid) < 0)
2238                         log_warning("Failed to parse %s", e);
2239                 else {
2240                         log_debug("%s: got %s", u->meta.id, e);
2241                         service_set_main_pid(s, pid);
2242                 }
2243         }
2244
2245         /* Interpret READY= */
2246         if (s->type == SERVICE_NOTIFY &&
2247             s->state == SERVICE_START &&
2248             strv_find(tags, "READY=1")) {
2249                 log_debug("%s: got READY=1", u->meta.id);
2250
2251                 service_enter_start_post(s);
2252         }
2253
2254         /* Interpret STATUS= */
2255         if ((e = strv_find_prefix(tags, "STATUS="))) {
2256                 char *t;
2257
2258                 if (!(t = strdup(e+7))) {
2259                         log_error("Failed to allocate string.");
2260                         return;
2261                 }
2262
2263                 log_debug("%s: got %s", u->meta.id, e);
2264
2265                 free(s->status_text);
2266                 s->status_text = t;
2267         }
2268 }
2269
2270 static int service_enumerate(Manager *m) {
2271         char **p;
2272         unsigned i;
2273         DIR *d = NULL;
2274         char *path = NULL, *fpath = NULL, *name = NULL;
2275         int r;
2276
2277         assert(m);
2278
2279         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
2280                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
2281                         struct dirent *de;
2282
2283                         free(path);
2284                         path = NULL;
2285                         if (asprintf(&path, "%s/%s", *p, rcnd_table[i].path) < 0) {
2286                                 r = -ENOMEM;
2287                                 goto finish;
2288                         }
2289
2290                         if (d)
2291                                 closedir(d);
2292
2293                         if (!(d = opendir(path))) {
2294                                 if (errno != ENOENT)
2295                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
2296
2297                                 continue;
2298                         }
2299
2300                         while ((de = readdir(d))) {
2301                                 Unit *service;
2302                                 int a, b;
2303
2304                                 if (ignore_file(de->d_name))
2305                                         continue;
2306
2307                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
2308                                         continue;
2309
2310                                 if (strlen(de->d_name) < 4)
2311                                         continue;
2312
2313                                 a = undecchar(de->d_name[1]);
2314                                 b = undecchar(de->d_name[2]);
2315
2316                                 if (a < 0 || b < 0)
2317                                         continue;
2318
2319                                 free(fpath);
2320                                 fpath = NULL;
2321                                 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i].path, de->d_name) < 0) {
2322                                         r = -ENOMEM;
2323                                         goto finish;
2324                                 }
2325
2326                                 if (access(fpath, X_OK) < 0) {
2327
2328                                         if (errno != ENOENT)
2329                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
2330
2331                                         continue;
2332                                 }
2333
2334                                 free(name);
2335                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
2336                                         r = -ENOMEM;
2337                                         goto finish;
2338                                 }
2339
2340                                 if ((r = manager_load_unit_prepare(m, name, NULL, &service)) < 0) {
2341                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
2342                                         continue;
2343                                 }
2344
2345                                 if (de->d_name[0] == 'S' &&
2346                                     (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT))
2347                                         SERVICE(service)->sysv_start_priority =
2348                                                 MAX(a*10 + b, SERVICE(service)->sysv_start_priority);
2349
2350                                 manager_dispatch_load_queue(m);
2351                                 service = unit_follow_merge(service);
2352
2353                                 if (de->d_name[0] == 'S') {
2354                                         Unit *runlevel_target;
2355
2356                                         if ((r = manager_load_unit(m, rcnd_table[i].target, NULL, &runlevel_target)) < 0)
2357                                                 goto finish;
2358
2359                                         if ((r = unit_add_dependency(runlevel_target, UNIT_WANTS, service, true)) < 0)
2360                                                 goto finish;
2361
2362                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, runlevel_target, true)) < 0)
2363                                                 goto finish;
2364
2365                                 } else if (de->d_name[0] == 'K' &&
2366                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
2367                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
2368                                         Unit *shutdown_target;
2369
2370                                         /* We honour K links only for
2371                                          * halt/reboot. For the normal
2372                                          * runlevels we assume the
2373                                          * stop jobs will be
2374                                          * implicitly added by the
2375                                          * core logic. Also, we don't
2376                                          * really distuingish here
2377                                          * between the runlevels 0 and
2378                                          * 6 and just add them to the
2379                                          * special shutdown target. On
2380                                          * SUSE the boot.d/ runlevel
2381                                          * is also used for shutdown,
2382                                          * so we add links for that
2383                                          * too to the shutdown
2384                                          * target.*/
2385
2386                                         if ((r = manager_load_unit(m, SPECIAL_SHUTDOWN_TARGET, NULL, &shutdown_target)) < 0)
2387                                                 goto finish;
2388
2389                                         if ((r = unit_add_dependency(service, UNIT_CONFLICTS, shutdown_target, true)) < 0)
2390                                                 goto finish;
2391
2392                                         if ((r = unit_add_dependency(service, UNIT_BEFORE, shutdown_target, true)) < 0)
2393                                                 goto finish;
2394                                 }
2395                         }
2396                 }
2397
2398         r = 0;
2399
2400 finish:
2401         free(path);
2402         free(fpath);
2403         free(name);
2404
2405         if (d)
2406                 closedir(d);
2407
2408         return r;
2409 }
2410
2411 static void service_bus_name_owner_change(
2412                 Unit *u,
2413                 const char *name,
2414                 const char *old_owner,
2415                 const char *new_owner) {
2416
2417         Service *s = SERVICE(u);
2418
2419         assert(s);
2420         assert(name);
2421
2422         assert(streq(s->bus_name, name));
2423         assert(old_owner || new_owner);
2424
2425         if (old_owner && new_owner)
2426                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->meta.id, name, old_owner, new_owner);
2427         else if (old_owner)
2428                 log_debug("%s's D-Bus name %s no longer registered by %s", u->meta.id, name, old_owner);
2429         else
2430                 log_debug("%s's D-Bus name %s now registered by %s", u->meta.id, name, new_owner);
2431
2432         s->bus_name_good = !!new_owner;
2433
2434         if (s->type == SERVICE_DBUS) {
2435
2436                 /* service_enter_running() will figure out what to
2437                  * do */
2438                 if (s->state == SERVICE_RUNNING)
2439                         service_enter_running(s, true);
2440                 else if (s->state == SERVICE_START && new_owner)
2441                         service_enter_start_post(s);
2442
2443         } else if (new_owner &&
2444                    s->main_pid <= 0 &&
2445                    (s->state == SERVICE_START ||
2446                     s->state == SERVICE_START_POST ||
2447                     s->state == SERVICE_RUNNING ||
2448                     s->state == SERVICE_RELOAD)) {
2449
2450                 /* Try to acquire PID from bus service */
2451                 log_debug("Trying to acquire PID from D-Bus name...");
2452
2453                 bus_query_pid(u->meta.manager, name);
2454         }
2455 }
2456
2457 static void service_bus_query_pid_done(
2458                 Unit *u,
2459                 const char *name,
2460                 pid_t pid) {
2461
2462         Service *s = SERVICE(u);
2463
2464         assert(s);
2465         assert(name);
2466
2467         log_debug("%s's D-Bus name %s is now owned by process %u", u->meta.id, name, (unsigned) pid);
2468
2469         if (s->main_pid <= 0 &&
2470             (s->state == SERVICE_START ||
2471              s->state == SERVICE_START_POST ||
2472              s->state == SERVICE_RUNNING ||
2473              s->state == SERVICE_RELOAD))
2474                 service_set_main_pid(s, pid);
2475 }
2476
2477 int service_set_socket_fd(Service *s, int fd) {
2478         assert(s);
2479         assert(fd >= 0);
2480
2481         /* This is called by the socket code when instantiating a new
2482          * service for a stream socket and the socket needs to be
2483          * configured. */
2484
2485         if (UNIT(s)->meta.load_state != UNIT_LOADED)
2486                 return -EINVAL;
2487
2488         if (s->socket_fd >= 0)
2489                 return -EBUSY;
2490
2491         if (s->state != SERVICE_DEAD)
2492                 return -EAGAIN;
2493
2494         s->socket_fd = fd;
2495         s->got_socket_fd = true;
2496         return 0;
2497 }
2498
2499 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
2500         [SERVICE_DEAD] = "dead",
2501         [SERVICE_START_PRE] = "start-pre",
2502         [SERVICE_START] = "start",
2503         [SERVICE_START_POST] = "start-post",
2504         [SERVICE_RUNNING] = "running",
2505         [SERVICE_EXITED] = "exited",
2506         [SERVICE_RELOAD] = "reload",
2507         [SERVICE_STOP] = "stop",
2508         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
2509         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
2510         [SERVICE_STOP_POST] = "stop-post",
2511         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
2512         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
2513         [SERVICE_MAINTENANCE] = "maintenance",
2514         [SERVICE_AUTO_RESTART] = "auto-restart",
2515 };
2516
2517 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
2518
2519 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
2520         [SERVICE_ONCE] = "once",
2521         [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
2522         [SERVICE_RESTART_ALWAYS] = "restart-always",
2523 };
2524
2525 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
2526
2527 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
2528         [SERVICE_FORKING] = "forking",
2529         [SERVICE_SIMPLE] = "simple",
2530         [SERVICE_FINISH] = "finish",
2531         [SERVICE_DBUS] = "dbus",
2532         [SERVICE_NOTIFY] = "notify"
2533 };
2534
2535 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
2536
2537 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
2538         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
2539         [SERVICE_EXEC_START] = "ExecStart",
2540         [SERVICE_EXEC_START_POST] = "ExecStartPost",
2541         [SERVICE_EXEC_RELOAD] = "ExecReload",
2542         [SERVICE_EXEC_STOP] = "ExecStop",
2543         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
2544 };
2545
2546 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
2547
2548 const UnitVTable service_vtable = {
2549         .suffix = ".service",
2550
2551         .init = service_init,
2552         .done = service_done,
2553         .load = service_load,
2554
2555         .coldplug = service_coldplug,
2556
2557         .dump = service_dump,
2558
2559         .start = service_start,
2560         .stop = service_stop,
2561         .reload = service_reload,
2562
2563         .can_reload = service_can_reload,
2564
2565         .serialize = service_serialize,
2566         .deserialize_item = service_deserialize_item,
2567
2568         .active_state = service_active_state,
2569         .sub_state_to_string = service_sub_state_to_string,
2570
2571         .check_gc = service_check_gc,
2572         .check_snapshot = service_check_snapshot,
2573
2574         .sigchld_event = service_sigchld_event,
2575         .timer_event = service_timer_event,
2576
2577         .cgroup_notify_empty = service_cgroup_notify_event,
2578         .notify_message = service_notify_message,
2579
2580         .bus_name_owner_change = service_bus_name_owner_change,
2581         .bus_query_pid_done = service_bus_query_pid_done,
2582
2583         .bus_message_handler = bus_service_message_handler,
2584
2585         .enumerate = service_enumerate
2586 };