src/service.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <errno.h>
  23 #include <signal.h>
  24 #include <dirent.h>
  25 #include <unistd.h>
  26 #include <sys/reboot.h>
  27
  28 #include "manager.h"
  29 #include "unit.h"
  30 #include "service.h"
  31 #include "load-fragment.h"
  32 #include "load-dropin.h"
  33 #include "log.h"
  34 #include "strv.h"
  35 #include "unit-name.h"
  36 #include "dbus-service.h"
  37 #include "special.h"
  38 #include "bus-errors.h"
  39 #include "exit-status.h"
  40 #include "def.h"
  41 #include "util.h"
  42
  43 #ifdef HAVE_SYSV_COMPAT
  44
  45 #define DEFAULT_SYSV_TIMEOUT_USEC (5*USEC_PER_MINUTE)
  46
  47 typedef enum RunlevelType {
  48         RUNLEVEL_UP,
  49         RUNLEVEL_DOWN,
  50         RUNLEVEL_SYSINIT
  51 } RunlevelType;
  52
  53 static const struct {
  54         const char *path;
  55         const char *target;
  56         const RunlevelType type;
  57 } rcnd_table[] = {
  58         /* Standard SysV runlevels for start-up */
  59         { "rc1.d",  SPECIAL_RESCUE_TARGET,    RUNLEVEL_UP },
  60         { "rc2.d",  SPECIAL_RUNLEVEL2_TARGET, RUNLEVEL_UP },
  61         { "rc3.d",  SPECIAL_RUNLEVEL3_TARGET, RUNLEVEL_UP },
  62         { "rc4.d",  SPECIAL_RUNLEVEL4_TARGET, RUNLEVEL_UP },
  63         { "rc5.d",  SPECIAL_RUNLEVEL5_TARGET, RUNLEVEL_UP },
  64
  65 #ifdef TARGET_SUSE
  66         /* SUSE style boot.d */
  67         { "boot.d", SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  68 #endif
  69
  70 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
  71         /* Debian style rcS.d */
  72         { "rcS.d",  SPECIAL_SYSINIT_TARGET,   RUNLEVEL_SYSINIT },
  73 #endif
  74
  75         /* Standard SysV runlevels for shutdown */
  76         { "rc0.d",  SPECIAL_POWEROFF_TARGET,  RUNLEVEL_DOWN },
  77         { "rc6.d",  SPECIAL_REBOOT_TARGET,    RUNLEVEL_DOWN }
  78
  79         /* Note that the order here matters, as we read the
  80            directories in this order, and we want to make sure that
  81            sysv_start_priority is known when we first load the
  82            unit. And that value we only know from S links. Hence
  83            UP/SYSINIT must be read before DOWN */
  84 };
  85
  86 #define RUNLEVELS_UP "12345"
  87 /* #define RUNLEVELS_DOWN "06" */
  88 #define RUNLEVELS_BOOT "bBsS"
  89 #endif
  90
  91 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
  92         [SERVICE_DEAD] = UNIT_INACTIVE,
  93         [SERVICE_START_PRE] = UNIT_ACTIVATING,
  94         [SERVICE_START] = UNIT_ACTIVATING,
  95         [SERVICE_START_POST] = UNIT_ACTIVATING,
  96         [SERVICE_RUNNING] = UNIT_ACTIVE,
  97         [SERVICE_EXITED] = UNIT_ACTIVE,
  98         [SERVICE_RELOAD] = UNIT_RELOADING,
  99         [SERVICE_STOP] = UNIT_DEACTIVATING,
 100         [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
 101         [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
 102         [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
 103         [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
 104         [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
 105         [SERVICE_FAILED] = UNIT_FAILED,
 106         [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING
 107 };
 108
 109 static void service_init(Unit *u) {
 110         Service *s = SERVICE(u);
 111
 112         assert(u);
 113         assert(u->load_state == UNIT_STUB);
 114
 115         s->timeout_usec = DEFAULT_TIMEOUT_USEC;
 116         s->restart_usec = DEFAULT_RESTART_USEC;
 117
 118         s->watchdog_watch.type = WATCH_INVALID;
 119
 120         s->timer_watch.type = WATCH_INVALID;
 121 #ifdef HAVE_SYSV_COMPAT
 122         s->sysv_start_priority = -1;
 123         s->sysv_start_priority_from_rcnd = -1;
 124 #endif
 125         s->socket_fd = -1;
 126         s->guess_main_pid = true;
 127
 128         exec_context_init(&s->exec_context);
 129
 130         RATELIMIT_INIT(s->start_limit, 10*USEC_PER_SEC, 5);
 131
 132         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
 133 }
 134
 135 static void service_unwatch_control_pid(Service *s) {
 136         assert(s);
 137
 138         if (s->control_pid <= 0)
 139                 return;
 140
 141         unit_unwatch_pid(UNIT(s), s->control_pid);
 142         s->control_pid = 0;
 143 }
 144
 145 static void service_unwatch_main_pid(Service *s) {
 146         assert(s);
 147
 148         if (s->main_pid <= 0)
 149                 return;
 150
 151         unit_unwatch_pid(UNIT(s), s->main_pid);
 152         s->main_pid = 0;
 153 }
 154
 155 static void service_unwatch_pid_file(Service *s) {
 156         if (!s->pid_file_pathspec)
 157                 return;
 158
 159         log_debug("Stopping watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
 160         path_spec_unwatch(s->pid_file_pathspec, UNIT(s));
 161         path_spec_done(s->pid_file_pathspec);
 162         free(s->pid_file_pathspec);
 163         s->pid_file_pathspec = NULL;
 164 }
 165
 166 static int service_set_main_pid(Service *s, pid_t pid) {
 167         pid_t ppid;
 168
 169         assert(s);
 170
 171         if (pid <= 1)
 172                 return -EINVAL;
 173
 174         if (pid == getpid())
 175                 return -EINVAL;
 176
 177         s->main_pid = pid;
 178         s->main_pid_known = true;
 179
 180         if (get_parent_of_pid(pid, &ppid) >= 0 && ppid != getpid()) {
 181                 log_warning("%s: Supervising process %lu which is not our child. We'll most likely not notice when it exits.",
 182                             UNIT(s)->id, (unsigned long) pid);
 183
 184                 s->main_pid_alien = true;
 185         } else
 186                 s->main_pid_alien = false;
 187
 188         exec_status_start(&s->main_exec_status, pid);
 189
 190         return 0;
 191 }
 192
 193 static void service_close_socket_fd(Service *s) {
 194         assert(s);
 195
 196         if (s->socket_fd < 0)
 197                 return;
 198
 199         close_nointr_nofail(s->socket_fd);
 200         s->socket_fd = -1;
 201 }
 202
 203 static void service_connection_unref(Service *s) {
 204         assert(s);
 205
 206         if (!UNIT_DEREF(s->accept_socket))
 207                 return;
 208
 209         socket_connection_unref(SOCKET(UNIT_DEREF(s->accept_socket)));
 210         unit_ref_unset(&s->accept_socket);
 211 }
 212
 213 static void service_stop_watchdog(Service *s) {
 214         assert(s);
 215
 216         unit_unwatch_timer(UNIT(s), &s->watchdog_watch);
 217         s->watchdog_timestamp.realtime = 0;
 218         s->watchdog_timestamp.monotonic = 0;
 219 }
 220
 221 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart);
 222
 223 static void service_handle_watchdog(Service *s) {
 224         usec_t offset;
 225         int r;
 226
 227         assert(s);
 228
 229         if (s->watchdog_usec == 0)
 230                 return;
 231
 232         offset = now(CLOCK_MONOTONIC) - s->watchdog_timestamp.monotonic;
 233         if (offset >= s->watchdog_usec) {
 234                 log_error("%s watchdog timeout!", UNIT(s)->id);
 235                 service_enter_dead(s, SERVICE_FAILURE_WATCHDOG, true);
 236                 return;
 237         }
 238
 239         r = unit_watch_timer(UNIT(s), s->watchdog_usec - offset, &s->watchdog_watch);
 240         if (r < 0)
 241                 log_warning("%s failed to install watchdog timer: %s", UNIT(s)->id, strerror(-r));
 242 }
 243
 244 static void service_reset_watchdog(Service *s) {
 245         assert(s);
 246
 247         dual_timestamp_get(&s->watchdog_timestamp);
 248         service_handle_watchdog(s);
 249 }
 250
 251 static void service_done(Unit *u) {
 252         Service *s = SERVICE(u);
 253
 254         assert(s);
 255
 256         free(s->pid_file);
 257         s->pid_file = NULL;
 258
 259 #ifdef HAVE_SYSV_COMPAT
 260         free(s->sysv_path);
 261         s->sysv_path = NULL;
 262
 263         free(s->sysv_runlevels);
 264         s->sysv_runlevels = NULL;
 265 #endif
 266
 267         free(s->status_text);
 268         s->status_text = NULL;
 269
 270         exec_context_done(&s->exec_context);
 271         exec_command_free_array(s->exec_command, _SERVICE_EXEC_COMMAND_MAX);
 272         s->control_command = NULL;
 273         s->main_command = NULL;
 274
 275         /* This will leak a process, but at least no memory or any of
 276          * our resources */
 277         service_unwatch_main_pid(s);
 278         service_unwatch_control_pid(s);
 279         service_unwatch_pid_file(s);
 280
 281         if (s->bus_name)  {
 282                 unit_unwatch_bus_name(u, s->bus_name);
 283                 free(s->bus_name);
 284                 s->bus_name = NULL;
 285         }
 286
 287         service_close_socket_fd(s);
 288         service_connection_unref(s);
 289
 290         unit_ref_unset(&s->accept_socket);
 291
 292         service_stop_watchdog(s);
 293
 294         unit_unwatch_timer(u, &s->timer_watch);
 295 }
 296
 297 #ifdef HAVE_SYSV_COMPAT
 298 static char *sysv_translate_name(const char *name) {
 299         char *r;
 300
 301         if (!(r = new(char, strlen(name) + sizeof(".service"))))
 302                 return NULL;
 303
 304 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
 305         if (endswith(name, ".sh"))
 306                 /* Drop Debian-style .sh suffix */
 307                 strcpy(stpcpy(r, name) - 3, ".service");
 308 #endif
 309 #ifdef TARGET_SUSE
 310         if (startswith(name, "boot."))
 311                 /* Drop SuSE-style boot. prefix */
 312                 strcpy(stpcpy(r, name + 5), ".service");
 313 #endif
 314 #ifdef TARGET_FRUGALWARE
 315         if (startswith(name, "rc."))
 316                 /* Drop Frugalware-style rc. prefix */
 317                 strcpy(stpcpy(r, name + 3), ".service");
 318 #endif
 319         else
 320                 /* Normal init scripts */
 321                 strcpy(stpcpy(r, name), ".service");
 322
 323         return r;
 324 }
 325
 326 static int sysv_translate_facility(const char *name, const char *filename, char **_r) {
 327
 328         /* We silently ignore the $ prefix here. According to the LSB
 329          * spec it simply indicates whether something is a
 330          * standardized name or a distribution-specific one. Since we
 331          * just follow what already exists and do not introduce new
 332          * uses or names we don't care who introduced a new name. */
 333
 334         static const char * const table[] = {
 335                 /* LSB defined facilities */
 336                 "local_fs",             SPECIAL_LOCAL_FS_TARGET,
 337 #if defined(TARGET_MANDRIVA) || defined(TARGET_MAGEIA)
 338 #else
 339                 /* Due to unfortunate name selection in Mandriva,
 340                  * $network is provided by network-up which is ordered
 341                  * after network which actually starts interfaces.
 342                  * To break the loop, just ignore it */
 343                 "network",              SPECIAL_NETWORK_TARGET,
 344 #endif
 345                 "named",                SPECIAL_NSS_LOOKUP_TARGET,
 346                 "portmap",              SPECIAL_RPCBIND_TARGET,
 347                 "remote_fs",            SPECIAL_REMOTE_FS_TARGET,
 348                 "syslog",               SPECIAL_SYSLOG_TARGET,
 349                 "time",                 SPECIAL_TIME_SYNC_TARGET,
 350
 351                 /* common extensions */
 352                 "mail-transfer-agent",  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 353                 "x-display-manager",    SPECIAL_DISPLAY_MANAGER_SERVICE,
 354                 "null",                 NULL,
 355
 356 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
 357                 "mail-transport-agent", SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 358 #endif
 359
 360 #ifdef TARGET_FEDORA
 361                 "MTA",                  SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 362                 "smtpdaemon",           SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 363                 "httpd",                SPECIAL_HTTP_DAEMON_TARGET,
 364 #endif
 365
 366 #ifdef TARGET_SUSE
 367                 "smtp",                 SPECIAL_MAIL_TRANSFER_AGENT_TARGET,
 368 #endif
 369         };
 370
 371         unsigned i;
 372         char *r;
 373         const char *n;
 374
 375         assert(name);
 376         assert(_r);
 377
 378         n = *name == '$' ? name + 1 : name;
 379
 380         for (i = 0; i < ELEMENTSOF(table); i += 2) {
 381
 382                 if (!streq(table[i], n))
 383                         continue;
 384
 385                 if (!table[i+1])
 386                         return 0;
 387
 388                 if (!(r = strdup(table[i+1])))
 389                         return -ENOMEM;
 390
 391                 goto finish;
 392         }
 393
 394         /* If we don't know this name, fallback heuristics to figure
 395          * out whether something is a target or a service alias. */
 396
 397         if (*name == '$') {
 398                 if (!unit_prefix_is_valid(n))
 399                         return -EINVAL;
 400
 401                 /* Facilities starting with $ are most likely targets */
 402                 r = unit_name_build(n, NULL, ".target");
 403         } else if (filename && streq(name, filename))
 404                 /* Names equaling the file name of the services are redundant */
 405                 return 0;
 406         else
 407                 /* Everything else we assume to be normal service names */
 408                 r = sysv_translate_name(n);
 409
 410         if (!r)
 411                 return -ENOMEM;
 412
 413 finish:
 414         *_r = r;
 415
 416         return 1;
 417 }
 418
 419 static int sysv_fix_order(Service *s) {
 420         Unit *other;
 421         int r;
 422
 423         assert(s);
 424
 425         if (s->sysv_start_priority < 0)
 426                 return 0;
 427
 428         /* For each pair of services where at least one lacks a LSB
 429          * header, we use the start priority value to order things. */
 430
 431         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
 432                 Service *t;
 433                 UnitDependency d;
 434                 bool special_s, special_t;
 435
 436                 t = SERVICE(other);
 437
 438                 if (s == t)
 439                         continue;
 440
 441                 if (UNIT(t)->load_state != UNIT_LOADED)
 442                         continue;
 443
 444                 if (t->sysv_start_priority < 0)
 445                         continue;
 446
 447                 /* If both units have modern headers we don't care
 448                  * about the priorities */
 449                 if ((UNIT(s)->fragment_path || s->sysv_has_lsb) &&
 450                     (UNIT(t)->fragment_path || t->sysv_has_lsb))
 451                         continue;
 452
 453                 special_s = s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels);
 454                 special_t = t->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, t->sysv_runlevels);
 455
 456                 if (special_t && !special_s)
 457                         d = UNIT_AFTER;
 458                 else if (special_s && !special_t)
 459                         d = UNIT_BEFORE;
 460                 else if (t->sysv_start_priority < s->sysv_start_priority)
 461                         d = UNIT_AFTER;
 462                 else if (t->sysv_start_priority > s->sysv_start_priority)
 463                         d = UNIT_BEFORE;
 464                 else
 465                         continue;
 466
 467                 /* FIXME: Maybe we should compare the name here lexicographically? */
 468
 469                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
 470                         return r;
 471         }
 472
 473         return 0;
 474 }
 475
 476 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
 477         ExecCommand *c;
 478
 479         if (!(c = new0(ExecCommand, 1)))
 480                 return NULL;
 481
 482         if (!(c->path = strdup(path))) {
 483                 free(c);
 484                 return NULL;
 485         }
 486
 487         if (!(c->argv = strv_new(path, arg1, NULL))) {
 488                 free(c->path);
 489                 free(c);
 490                 return NULL;
 491         }
 492
 493         return c;
 494 }
 495
 496 static int sysv_exec_commands(Service *s) {
 497         ExecCommand *c;
 498
 499         assert(s);
 500         assert(s->sysv_path);
 501
 502         if (!(c = exec_command_new(s->sysv_path, "start")))
 503                 return -ENOMEM;
 504         exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
 505
 506         if (!(c = exec_command_new(s->sysv_path, "stop")))
 507                 return -ENOMEM;
 508         exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
 509
 510         if (!(c = exec_command_new(s->sysv_path, "reload")))
 511                 return -ENOMEM;
 512         exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
 513
 514         return 0;
 515 }
 516
 517 static int service_load_sysv_path(Service *s, const char *path) {
 518         FILE *f;
 519         Unit *u;
 520         unsigned line = 0;
 521         int r;
 522         enum {
 523                 NORMAL,
 524                 DESCRIPTION,
 525                 LSB,
 526                 LSB_DESCRIPTION
 527         } state = NORMAL;
 528         char *short_description = NULL, *long_description = NULL, *chkconfig_description = NULL, *description;
 529         struct stat st;
 530
 531         assert(s);
 532         assert(path);
 533
 534         u = UNIT(s);
 535
 536         if (!(f = fopen(path, "re"))) {
 537                 r = errno == ENOENT ? 0 : -errno;
 538                 goto finish;
 539         }
 540
 541         zero(st);
 542         if (fstat(fileno(f), &st) < 0) {
 543                 r = -errno;
 544                 goto finish;
 545         }
 546
 547         free(s->sysv_path);
 548         if (!(s->sysv_path = strdup(path))) {
 549                 r = -ENOMEM;
 550                 goto finish;
 551         }
 552
 553         s->sysv_mtime = timespec_load(&st.st_mtim);
 554
 555         if (null_or_empty(&st)) {
 556                 u->load_state = UNIT_MASKED;
 557                 r = 0;
 558                 goto finish;
 559         }
 560
 561         while (!feof(f)) {
 562                 char l[LINE_MAX], *t;
 563
 564                 if (!fgets(l, sizeof(l), f)) {
 565                         if (feof(f))
 566                                 break;
 567
 568                         r = -errno;
 569                         log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
 570                         goto finish;
 571                 }
 572
 573                 line++;
 574
 575                 t = strstrip(l);
 576                 if (*t != '#')
 577                         continue;
 578
 579                 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
 580                         state = LSB;
 581                         s->sysv_has_lsb = true;
 582                         continue;
 583                 }
 584
 585                 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
 586                         state = NORMAL;
 587                         continue;
 588                 }
 589
 590                 t++;
 591                 t += strspn(t, WHITESPACE);
 592
 593                 if (state == NORMAL) {
 594
 595                         /* Try to parse Red Hat style chkconfig headers */
 596
 597                         if (startswith_no_case(t, "chkconfig:")) {
 598                                 int start_priority;
 599                                 char runlevels[16], *k;
 600
 601                                 state = NORMAL;
 602
 603                                 if (sscanf(t+10, "%15s %i %*i",
 604                                            runlevels,
 605                                            &start_priority) != 2) {
 606
 607                                         log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
 608                                         continue;
 609                                 }
 610
 611                                 /* A start priority gathered from the
 612                                  * symlink farms is preferred over the
 613                                  * data from the LSB header. */
 614                                 if (start_priority < 0 || start_priority > 99)
 615                                         log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
 616                                 else
 617                                         s->sysv_start_priority = start_priority;
 618
 619                                 char_array_0(runlevels);
 620                                 k = delete_chars(runlevels, WHITESPACE "-");
 621
 622                                 if (k[0]) {
 623                                         char *d;
 624
 625                                         if (!(d = strdup(k))) {
 626                                                 r = -ENOMEM;
 627                                                 goto finish;
 628                                         }
 629
 630                                         free(s->sysv_runlevels);
 631                                         s->sysv_runlevels = d;
 632                                 }
 633
 634                         } else if (startswith_no_case(t, "description:")) {
 635
 636                                 size_t k = strlen(t);
 637                                 char *d;
 638                                 const char *j;
 639
 640                                 if (t[k-1] == '\\') {
 641                                         state = DESCRIPTION;
 642                                         t[k-1] = 0;
 643                                 }
 644
 645                                 if ((j = strstrip(t+12)) && *j) {
 646                                         if (!(d = strdup(j))) {
 647                                                 r = -ENOMEM;
 648                                                 goto finish;
 649                                         }
 650                                 } else
 651                                         d = NULL;
 652
 653                                 free(chkconfig_description);
 654                                 chkconfig_description = d;
 655
 656                         } else if (startswith_no_case(t, "pidfile:")) {
 657
 658                                 char *fn;
 659
 660                                 state = NORMAL;
 661
 662                                 fn = strstrip(t+8);
 663                                 if (!path_is_absolute(fn)) {
 664                                         log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
 665                                         continue;
 666                                 }
 667
 668                                 if (!(fn = strdup(fn))) {
 669                                         r = -ENOMEM;
 670                                         goto finish;
 671                                 }
 672
 673                                 free(s->pid_file);
 674                                 s->pid_file = fn;
 675                         }
 676
 677                 } else if (state == DESCRIPTION) {
 678
 679                         /* Try to parse Red Hat style description
 680                          * continuation */
 681
 682                         size_t k = strlen(t);
 683                         char *j;
 684
 685                         if (t[k-1] == '\\')
 686                                 t[k-1] = 0;
 687                         else
 688                                 state = NORMAL;
 689
 690                         if ((j = strstrip(t)) && *j) {
 691                                 char *d = NULL;
 692
 693                                 if (chkconfig_description)
 694                                         d = join(chkconfig_description, " ", j, NULL);
 695                                 else
 696                                         d = strdup(j);
 697
 698                                 if (!d) {
 699                                         r = -ENOMEM;
 700                                         goto finish;
 701                                 }
 702
 703                                 free(chkconfig_description);
 704                                 chkconfig_description = d;
 705                         }
 706
 707                 } else if (state == LSB || state == LSB_DESCRIPTION) {
 708
 709                         if (startswith_no_case(t, "Provides:")) {
 710                                 char *i, *w;
 711                                 size_t z;
 712
 713                                 state = LSB;
 714
 715                                 FOREACH_WORD_QUOTED(w, z, t+9, i) {
 716                                         char *n, *m;
 717
 718                                         if (!(n = strndup(w, z))) {
 719                                                 r = -ENOMEM;
 720                                                 goto finish;
 721                                         }
 722
 723                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 724                                         free(n);
 725
 726                                         if (r < 0)
 727                                                 goto finish;
 728
 729                                         if (r == 0)
 730                                                 continue;
 731
 732                                         if (unit_name_to_type(m) == UNIT_SERVICE)
 733                                                 r = unit_add_name(u, m);
 734                                         else
 735                                                 /* NB: SysV targets
 736                                                  * which are provided
 737                                                  * by a service are
 738                                                  * pulled in by the
 739                                                  * services, as an
 740                                                  * indication that the
 741                                                  * generic service is
 742                                                  * now available. This
 743                                                  * is strictly
 744                                                  * one-way. The
 745                                                  * targets do NOT pull
 746                                                  * in the SysV
 747                                                  * services! */
 748                                                 r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, UNIT_WANTS, m, NULL, true);
 749
 750                                         if (r < 0)
 751                                                 log_error("[%s:%u] Failed to add LSB Provides name %s, ignoring: %s", path, line, m, strerror(-r));
 752
 753                                         free(m);
 754                                 }
 755
 756                         } else if (startswith_no_case(t, "Required-Start:") ||
 757                                    startswith_no_case(t, "Should-Start:") ||
 758                                    startswith_no_case(t, "X-Start-Before:") ||
 759                                    startswith_no_case(t, "X-Start-After:")) {
 760                                 char *i, *w;
 761                                 size_t z;
 762
 763                                 state = LSB;
 764
 765                                 FOREACH_WORD_QUOTED(w, z, strchr(t, ':')+1, i) {
 766                                         char *n, *m;
 767
 768                                         if (!(n = strndup(w, z))) {
 769                                                 r = -ENOMEM;
 770                                                 goto finish;
 771                                         }
 772
 773                                         r = sysv_translate_facility(n, file_name_from_path(path), &m);
 774
 775                                         if (r < 0) {
 776                                                 log_error("[%s:%u] Failed to translate LSB dependency %s, ignoring: %s", path, line, n, strerror(-r));
 777                                                 free(n);
 778                                                 continue;
 779                                         }
 780
 781                                         free(n);
 782
 783                                         if (r == 0)
 784                                                 continue;
 785
 786                                         r = unit_add_dependency_by_name(u, startswith_no_case(t, "X-Start-Before:") ? UNIT_BEFORE : UNIT_AFTER, m, NULL, true);
 787
 788                                         if (r < 0)
 789                                                 log_error("[%s:%u] Failed to add dependency on %s, ignoring: %s", path, line, m, strerror(-r));
 790
 791                                         free(m);
 792                                 }
 793                         } else if (startswith_no_case(t, "Default-Start:")) {
 794                                 char *k, *d;
 795
 796                                 state = LSB;
 797
 798                                 k = delete_chars(t+14, WHITESPACE "-");
 799
 800                                 if (k[0] != 0) {
 801                                         if (!(d = strdup(k))) {
 802                                                 r = -ENOMEM;
 803                                                 goto finish;
 804                                         }
 805
 806                                         free(s->sysv_runlevels);
 807                                         s->sysv_runlevels = d;
 808                                 }
 809
 810                         } else if (startswith_no_case(t, "Description:")) {
 811                                 char *d, *j;
 812
 813                                 state = LSB_DESCRIPTION;
 814
 815                                 if ((j = strstrip(t+12)) && *j) {
 816                                         if (!(d = strdup(j))) {
 817                                                 r = -ENOMEM;
 818                                                 goto finish;
 819                                         }
 820                                 } else
 821                                         d = NULL;
 822
 823                                 free(long_description);
 824                                 long_description = d;
 825
 826                         } else if (startswith_no_case(t, "Short-Description:")) {
 827                                 char *d, *j;
 828
 829                                 state = LSB;
 830
 831                                 if ((j = strstrip(t+18)) && *j) {
 832                                         if (!(d = strdup(j))) {
 833                                                 r = -ENOMEM;
 834                                                 goto finish;
 835                                         }
 836                                 } else
 837                                         d = NULL;
 838
 839                                 free(short_description);
 840                                 short_description = d;
 841
 842                         } else if (state == LSB_DESCRIPTION) {
 843
 844                                 if (startswith(l, "#\t") || startswith(l, "#  ")) {
 845                                         char *j;
 846
 847                                         if ((j = strstrip(t)) && *j) {
 848                                                 char *d = NULL;
 849
 850                                                 if (long_description)
 851                                                         d = join(long_description, " ", t, NULL);
 852                                                 else
 853                                                         d = strdup(j);
 854
 855                                                 if (!d) {
 856                                                         r = -ENOMEM;
 857                                                         goto finish;
 858                                                 }
 859
 860                                                 free(long_description);
 861                                                 long_description = d;
 862                                         }
 863
 864                                 } else
 865                                         state = LSB;
 866                         }
 867                 }
 868         }
 869
 870         if ((r = sysv_exec_commands(s)) < 0)
 871                 goto finish;
 872         if (s->sysv_runlevels &&
 873             chars_intersect(RUNLEVELS_BOOT, s->sysv_runlevels) &&
 874             chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 875                 /* Service has both boot and "up" runlevels
 876                    configured.  Kill the "up" ones. */
 877                 delete_chars(s->sysv_runlevels, RUNLEVELS_UP);
 878         }
 879
 880         if (s->sysv_runlevels && !chars_intersect(RUNLEVELS_UP, s->sysv_runlevels)) {
 881                 /* If there a runlevels configured for this service
 882                  * but none of the standard ones, then we assume this
 883                  * is some special kind of service (which might be
 884                  * needed for early boot) and don't create any links
 885                  * to it. */
 886
 887                 UNIT(s)->default_dependencies = false;
 888
 889                 /* Don't timeout special services during boot (like fsck) */
 890                 s->timeout_usec = 0;
 891         } else
 892                 s->timeout_usec = DEFAULT_SYSV_TIMEOUT_USEC;
 893
 894         /* Special setting for all SysV services */
 895         s->type = SERVICE_FORKING;
 896         s->remain_after_exit = !s->pid_file;
 897         s->guess_main_pid = false;
 898         s->restart = SERVICE_RESTART_NO;
 899         s->exec_context.ignore_sigpipe = false;
 900
 901         if (UNIT(s)->manager->sysv_console)
 902                 s->exec_context.std_output = EXEC_OUTPUT_JOURNAL_AND_CONSOLE;
 903
 904         s->exec_context.kill_mode = KILL_PROCESS;
 905
 906         /* We use the long description only if
 907          * no short description is set. */
 908
 909         if (short_description)
 910                 description = short_description;
 911         else if (chkconfig_description)
 912                 description = chkconfig_description;
 913         else if (long_description)
 914                 description = long_description;
 915         else
 916                 description = NULL;
 917
 918         if (description) {
 919                 char *d;
 920
 921                 if (!(d = strappend(s->sysv_has_lsb ? "LSB: " : "SYSV: ", description))) {
 922                         r = -ENOMEM;
 923                         goto finish;
 924                 }
 925
 926                 u->description = d;
 927         }
 928
 929         /* The priority that has been set in /etc/rcN.d/ hierarchies
 930          * takes precedence over what is stored as default in the LSB
 931          * header */
 932         if (s->sysv_start_priority_from_rcnd >= 0)
 933                 s->sysv_start_priority = s->sysv_start_priority_from_rcnd;
 934
 935         u->load_state = UNIT_LOADED;
 936         r = 0;
 937
 938 finish:
 939
 940         if (f)
 941                 fclose(f);
 942
 943         free(short_description);
 944         free(long_description);
 945         free(chkconfig_description);
 946
 947         return r;
 948 }
 949
 950 static int service_load_sysv_name(Service *s, const char *name) {
 951         char **p;
 952
 953         assert(s);
 954         assert(name);
 955
 956         /* For SysV services we strip the boot.*, rc.* and *.sh
 957          * prefixes/suffixes. */
 958 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
 959         if (endswith(name, ".sh.service"))
 960                 return -ENOENT;
 961 #endif
 962
 963 #ifdef TARGET_SUSE
 964         if (startswith(name, "boot."))
 965                 return -ENOENT;
 966 #endif
 967
 968 #ifdef TARGET_FRUGALWARE
 969         if (startswith(name, "rc."))
 970                 return -ENOENT;
 971 #endif
 972
 973         STRV_FOREACH(p, UNIT(s)->manager->lookup_paths.sysvinit_path) {
 974                 char *path;
 975                 int r;
 976
 977                 path = join(*p, "/", name, NULL);
 978                 if (!path)
 979                         return -ENOMEM;
 980
 981                 assert(endswith(path, ".service"));
 982                 path[strlen(path)-8] = 0;
 983
 984                 r = service_load_sysv_path(s, path);
 985
 986 #if defined(TARGET_DEBIAN) || defined(TARGET_UBUNTU) || defined(TARGET_ANGSTROM)
 987                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
 988                         /* Try Debian style *.sh source'able init scripts */
 989                         strcat(path, ".sh");
 990                         r = service_load_sysv_path(s, path);
 991                 }
 992 #endif
 993                 free(path);
 994
 995 #ifdef TARGET_SUSE
 996                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
 997                         /* Try SUSE style boot.* init scripts */
 998
 999                         path = join(*p, "/boot.", name, NULL);
1000                         if (!path)
1001                                 return -ENOMEM;
1002
1003                         /* Drop .service suffix */
1004                         path[strlen(path)-8] = 0;
1005                         r = service_load_sysv_path(s, path);
1006                         free(path);
1007                 }
1008 #endif
1009
1010 #ifdef TARGET_FRUGALWARE
1011                 if (r >= 0 && UNIT(s)->load_state == UNIT_STUB) {
1012                         /* Try Frugalware style rc.* init scripts */
1013
1014                         path = join(*p, "/rc.", name, NULL);
1015                         if (!path)
1016                                 return -ENOMEM;
1017
1018                         /* Drop .service suffix */
1019                         path[strlen(path)-8] = 0;
1020                         r = service_load_sysv_path(s, path);
1021                         free(path);
1022                 }
1023 #endif
1024
1025                 if (r < 0)
1026                         return r;
1027
1028                 if ((UNIT(s)->load_state != UNIT_STUB))
1029                         break;
1030         }
1031
1032         return 0;
1033 }
1034
1035 static int service_load_sysv(Service *s) {
1036         const char *t;
1037         Iterator i;
1038         int r;
1039
1040         assert(s);
1041
1042         /* Load service data from SysV init scripts, preferably with
1043          * LSB headers ... */
1044
1045         if (strv_isempty(UNIT(s)->manager->lookup_paths.sysvinit_path))
1046                 return 0;
1047
1048         if ((t = UNIT(s)->id))
1049                 if ((r = service_load_sysv_name(s, t)) < 0)
1050                         return r;
1051
1052         if (UNIT(s)->load_state == UNIT_STUB)
1053                 SET_FOREACH(t, UNIT(s)->names, i) {
1054                         if (t == UNIT(s)->id)
1055                                 continue;
1056
1057                         if ((r = service_load_sysv_name(s, t)) < 0)
1058                                 return r;
1059
1060                         if (UNIT(s)->load_state != UNIT_STUB)
1061                                 break;
1062                 }
1063
1064         return 0;
1065 }
1066 #endif
1067
1068 static int fsck_fix_order(Service *s) {
1069         Unit *other;
1070         int r;
1071
1072         assert(s);
1073
1074         if (s->fsck_passno <= 0)
1075                 return 0;
1076
1077         /* For each pair of services where both have an fsck priority
1078          * we order things based on it. */
1079
1080         LIST_FOREACH(units_by_type, other, UNIT(s)->manager->units_by_type[UNIT_SERVICE]) {
1081                 Service *t;
1082                 UnitDependency d;
1083
1084                 t = SERVICE(other);
1085
1086                 if (s == t)
1087                         continue;
1088
1089                 if (UNIT(t)->load_state != UNIT_LOADED)
1090                         continue;
1091
1092                 if (t->fsck_passno <= 0)
1093                         continue;
1094
1095                 if (t->fsck_passno < s->fsck_passno)
1096                         d = UNIT_AFTER;
1097                 else if (t->fsck_passno > s->fsck_passno)
1098                         d = UNIT_BEFORE;
1099                 else
1100                         continue;
1101
1102                 if ((r = unit_add_dependency(UNIT(s), d, UNIT(t), true)) < 0)
1103                         return r;
1104         }
1105
1106         return 0;
1107 }
1108
1109 static int service_verify(Service *s) {
1110         assert(s);
1111
1112         if (UNIT(s)->load_state != UNIT_LOADED)
1113                 return 0;
1114
1115         if (!s->exec_command[SERVICE_EXEC_START]) {
1116                 log_error("%s lacks ExecStart setting. Refusing.", UNIT(s)->id);
1117                 return -EINVAL;
1118         }
1119
1120         if (s->type != SERVICE_ONESHOT &&
1121             s->exec_command[SERVICE_EXEC_START]->command_next) {
1122                 log_error("%s has more than one ExecStart setting, which is only allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1123                 return -EINVAL;
1124         }
1125
1126         if (s->type == SERVICE_ONESHOT &&
1127             s->exec_command[SERVICE_EXEC_RELOAD]) {
1128                 log_error("%s has an ExecReload setting, which is not allowed for Type=oneshot services. Refusing.", UNIT(s)->id);
1129                 return -EINVAL;
1130         }
1131
1132         if (s->type == SERVICE_DBUS && !s->bus_name) {
1133                 log_error("%s is of type D-Bus but no D-Bus service name has been specified. Refusing.", UNIT(s)->id);
1134                 return -EINVAL;
1135         }
1136
1137         if (s->exec_context.pam_name && s->exec_context.kill_mode != KILL_CONTROL_GROUP) {
1138                 log_error("%s has PAM enabled. Kill mode must be set to 'control-group'. Refusing.", UNIT(s)->id);
1139                 return -EINVAL;
1140         }
1141
1142         return 0;
1143 }
1144
1145 static int service_add_default_dependencies(Service *s) {
1146         int r;
1147
1148         assert(s);
1149
1150         /* Add a number of automatic dependencies useful for the
1151          * majority of services. */
1152
1153         /* First, pull in base system */
1154         if (UNIT(s)->manager->running_as == MANAGER_SYSTEM) {
1155
1156                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_BASIC_TARGET, NULL, true)) < 0)
1157                         return r;
1158
1159         } else if (UNIT(s)->manager->running_as == MANAGER_USER) {
1160
1161                 if ((r = unit_add_two_dependencies_by_name(UNIT(s), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SOCKETS_TARGET, NULL, true)) < 0)
1162                         return r;
1163         }
1164
1165         /* Second, activate normal shutdown */
1166         return unit_add_two_dependencies_by_name(UNIT(s), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true);
1167 }
1168
1169 static void service_fix_output(Service *s) {
1170         assert(s);
1171
1172         /* If nothing has been explicitly configured, patch default
1173          * output in. If input is socket/tty we avoid this however,
1174          * since in that case we want output to default to the same
1175          * place as we read input from. */
1176
1177         if (s->exec_context.std_error == EXEC_OUTPUT_INHERIT &&
1178             s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1179             s->exec_context.std_input == EXEC_INPUT_NULL)
1180                 s->exec_context.std_error = UNIT(s)->manager->default_std_error;
1181
1182         if (s->exec_context.std_output == EXEC_OUTPUT_INHERIT &&
1183             s->exec_context.std_input == EXEC_INPUT_NULL)
1184                 s->exec_context.std_output = UNIT(s)->manager->default_std_output;
1185 }
1186
1187 static int service_load(Unit *u) {
1188         int r;
1189         Service *s = SERVICE(u);
1190
1191         assert(s);
1192
1193         /* Load a .service file */
1194         if ((r = unit_load_fragment(u)) < 0)
1195                 return r;
1196
1197 #ifdef HAVE_SYSV_COMPAT
1198         /* Load a classic init script as a fallback, if we couldn't find anything */
1199         if (u->load_state == UNIT_STUB)
1200                 if ((r = service_load_sysv(s)) < 0)
1201                         return r;
1202 #endif
1203
1204         /* Still nothing found? Then let's give up */
1205         if (u->load_state == UNIT_STUB)
1206                 return -ENOENT;
1207
1208         /* We were able to load something, then let's add in the
1209          * dropin directories. */
1210         if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
1211                 return r;
1212
1213         /* This is a new unit? Then let's add in some extras */
1214         if (u->load_state == UNIT_LOADED) {
1215                 service_fix_output(s);
1216
1217                 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
1218                         return r;
1219
1220                 if ((r = unit_add_default_cgroups(u)) < 0)
1221                         return r;
1222
1223 #ifdef HAVE_SYSV_COMPAT
1224                 if ((r = sysv_fix_order(s)) < 0)
1225                         return r;
1226 #endif
1227
1228                 if ((r = fsck_fix_order(s)) < 0)
1229                         return r;
1230
1231                 if (s->bus_name)
1232                         if ((r = unit_watch_bus_name(u, s->bus_name)) < 0)
1233                                 return r;
1234
1235                 if (s->type == SERVICE_NOTIFY && s->notify_access == NOTIFY_NONE)
1236                         s->notify_access = NOTIFY_MAIN;
1237
1238                 if (s->watchdog_usec > 0 && s->notify_access == NOTIFY_NONE)
1239                         s->notify_access = NOTIFY_MAIN;
1240
1241                 if (s->type == SERVICE_DBUS || s->bus_name)
1242                         if ((r = unit_add_two_dependencies_by_name(u, UNIT_AFTER, UNIT_REQUIRES, SPECIAL_DBUS_SOCKET, NULL, true)) < 0)
1243                                 return r;
1244
1245                 if (UNIT(s)->default_dependencies)
1246                         if ((r = service_add_default_dependencies(s)) < 0)
1247                                 return r;
1248         }
1249
1250         return service_verify(s);
1251 }
1252
1253 static void service_dump(Unit *u, FILE *f, const char *prefix) {
1254
1255         ServiceExecCommand c;
1256         Service *s = SERVICE(u);
1257         const char *prefix2;
1258         char *p2;
1259
1260         assert(s);
1261
1262         p2 = strappend(prefix, "\t");
1263         prefix2 = p2 ? p2 : prefix;
1264
1265         fprintf(f,
1266                 "%sService State: %s\n"
1267                 "%sResult: %s\n"
1268                 "%sReload Result: %s\n"
1269                 "%sPermissionsStartOnly: %s\n"
1270                 "%sRootDirectoryStartOnly: %s\n"
1271                 "%sRemainAfterExit: %s\n"
1272                 "%sGuessMainPID: %s\n"
1273                 "%sType: %s\n"
1274                 "%sRestart: %s\n"
1275                 "%sNotifyAccess: %s\n",
1276                 prefix, service_state_to_string(s->state),
1277                 prefix, service_result_to_string(s->result),
1278                 prefix, service_result_to_string(s->reload_result),
1279                 prefix, yes_no(s->permissions_start_only),
1280                 prefix, yes_no(s->root_directory_start_only),
1281                 prefix, yes_no(s->remain_after_exit),
1282                 prefix, yes_no(s->guess_main_pid),
1283                 prefix, service_type_to_string(s->type),
1284                 prefix, service_restart_to_string(s->restart),
1285                 prefix, notify_access_to_string(s->notify_access));
1286
1287         if (s->control_pid > 0)
1288                 fprintf(f,
1289                         "%sControl PID: %lu\n",
1290                         prefix, (unsigned long) s->control_pid);
1291
1292         if (s->main_pid > 0)
1293                 fprintf(f,
1294                         "%sMain PID: %lu\n"
1295                         "%sMain PID Known: %s\n"
1296                         "%sMain PID Alien: %s\n",
1297                         prefix, (unsigned long) s->main_pid,
1298                         prefix, yes_no(s->main_pid_known),
1299                         prefix, yes_no(s->main_pid_alien));
1300
1301         if (s->pid_file)
1302                 fprintf(f,
1303                         "%sPIDFile: %s\n",
1304                         prefix, s->pid_file);
1305
1306         if (s->bus_name)
1307                 fprintf(f,
1308                         "%sBusName: %s\n"
1309                         "%sBus Name Good: %s\n",
1310                         prefix, s->bus_name,
1311                         prefix, yes_no(s->bus_name_good));
1312
1313         exec_context_dump(&s->exec_context, f, prefix);
1314
1315         for (c = 0; c < _SERVICE_EXEC_COMMAND_MAX; c++) {
1316
1317                 if (!s->exec_command[c])
1318                         continue;
1319
1320                 fprintf(f, "%s-> %s:\n",
1321                         prefix, service_exec_command_to_string(c));
1322
1323                 exec_command_dump_list(s->exec_command[c], f, prefix2);
1324         }
1325
1326 #ifdef HAVE_SYSV_COMPAT
1327         if (s->sysv_path)
1328                 fprintf(f,
1329                         "%sSysV Init Script Path: %s\n"
1330                         "%sSysV Init Script has LSB Header: %s\n"
1331                         "%sSysVEnabled: %s\n",
1332                         prefix, s->sysv_path,
1333                         prefix, yes_no(s->sysv_has_lsb),
1334                         prefix, yes_no(s->sysv_enabled));
1335
1336         if (s->sysv_start_priority >= 0)
1337                 fprintf(f,
1338                         "%sSysVStartPriority: %i\n",
1339                         prefix, s->sysv_start_priority);
1340
1341         if (s->sysv_runlevels)
1342                 fprintf(f, "%sSysVRunLevels: %s\n",
1343                         prefix, s->sysv_runlevels);
1344 #endif
1345
1346         if (s->fsck_passno > 0)
1347                 fprintf(f,
1348                         "%sFsckPassNo: %i\n",
1349                         prefix, s->fsck_passno);
1350
1351         if (s->status_text)
1352                 fprintf(f, "%sStatus Text: %s\n",
1353                         prefix, s->status_text);
1354
1355         free(p2);
1356 }
1357
1358 static int service_load_pid_file(Service *s, bool may_warn) {
1359         char *k;
1360         int r;
1361         pid_t pid;
1362
1363         assert(s);
1364
1365         if (!s->pid_file)
1366                 return -ENOENT;
1367
1368         if ((r = read_one_line_file(s->pid_file, &k)) < 0) {
1369                 if (may_warn)
1370                         log_info("PID file %s not readable (yet?) after %s.",
1371                                  s->pid_file, service_state_to_string(s->state));
1372                 return r;
1373         }
1374
1375         r = parse_pid(k, &pid);
1376         free(k);
1377
1378         if (r < 0)
1379                 return r;
1380
1381         if (kill(pid, 0) < 0 && errno != EPERM) {
1382                 if (may_warn)
1383                         log_info("PID %lu read from file %s does not exist.",
1384                                  (unsigned long) pid, s->pid_file);
1385                 return -ESRCH;
1386         }
1387
1388         if (s->main_pid_known) {
1389                 if (pid == s->main_pid)
1390                         return 0;
1391
1392                 log_debug("Main PID changing: %lu -> %lu",
1393                           (unsigned long) s->main_pid, (unsigned long) pid);
1394                 service_unwatch_main_pid(s);
1395                 s->main_pid_known = false;
1396         } else
1397                 log_debug("Main PID loaded: %lu", (unsigned long) pid);
1398
1399         if ((r = service_set_main_pid(s, pid)) < 0)
1400                 return r;
1401
1402         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1403                 /* FIXME: we need to do something here */
1404                 return r;
1405
1406         return 0;
1407 }
1408
1409 static int service_search_main_pid(Service *s) {
1410         pid_t pid;
1411         int r;
1412
1413         assert(s);
1414
1415         /* If we know it anyway, don't ever fallback to unreliable
1416          * heuristics */
1417         if (s->main_pid_known)
1418                 return 0;
1419
1420         if (!s->guess_main_pid)
1421                 return 0;
1422
1423         assert(s->main_pid <= 0);
1424
1425         if ((pid = cgroup_bonding_search_main_pid_list(UNIT(s)->cgroup_bondings)) <= 0)
1426                 return -ENOENT;
1427
1428         log_debug("Main PID guessed: %lu", (unsigned long) pid);
1429         if ((r = service_set_main_pid(s, pid)) < 0)
1430                 return r;
1431
1432         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1433                 /* FIXME: we need to do something here */
1434                 return r;
1435
1436         return 0;
1437 }
1438
1439 static void service_notify_sockets_dead(Service *s) {
1440         Iterator i;
1441         Unit *u;
1442
1443         assert(s);
1444
1445         /* Notifies all our sockets when we die */
1446
1447         if (s->socket_fd >= 0)
1448                 return;
1449
1450         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i)
1451                 if (u->type == UNIT_SOCKET)
1452                         socket_notify_service_dead(SOCKET(u));
1453
1454         return;
1455 }
1456
1457 static void service_set_state(Service *s, ServiceState state) {
1458         ServiceState old_state;
1459         assert(s);
1460
1461         old_state = s->state;
1462         s->state = state;
1463
1464         service_unwatch_pid_file(s);
1465
1466         if (state != SERVICE_START_PRE &&
1467             state != SERVICE_START &&
1468             state != SERVICE_START_POST &&
1469             state != SERVICE_RELOAD &&
1470             state != SERVICE_STOP &&
1471             state != SERVICE_STOP_SIGTERM &&
1472             state != SERVICE_STOP_SIGKILL &&
1473             state != SERVICE_STOP_POST &&
1474             state != SERVICE_FINAL_SIGTERM &&
1475             state != SERVICE_FINAL_SIGKILL &&
1476             state != SERVICE_AUTO_RESTART)
1477                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1478
1479         if (state != SERVICE_START &&
1480             state != SERVICE_START_POST &&
1481             state != SERVICE_RUNNING &&
1482             state != SERVICE_RELOAD &&
1483             state != SERVICE_STOP &&
1484             state != SERVICE_STOP_SIGTERM &&
1485             state != SERVICE_STOP_SIGKILL) {
1486                 service_unwatch_main_pid(s);
1487                 s->main_command = NULL;
1488         }
1489
1490         if (state != SERVICE_START_PRE &&
1491             state != SERVICE_START &&
1492             state != SERVICE_START_POST &&
1493             state != SERVICE_RELOAD &&
1494             state != SERVICE_STOP &&
1495             state != SERVICE_STOP_SIGTERM &&
1496             state != SERVICE_STOP_SIGKILL &&
1497             state != SERVICE_STOP_POST &&
1498             state != SERVICE_FINAL_SIGTERM &&
1499             state != SERVICE_FINAL_SIGKILL) {
1500                 service_unwatch_control_pid(s);
1501                 s->control_command = NULL;
1502                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
1503         }
1504
1505         if (state == SERVICE_DEAD ||
1506             state == SERVICE_STOP ||
1507             state == SERVICE_STOP_SIGTERM ||
1508             state == SERVICE_STOP_SIGKILL ||
1509             state == SERVICE_STOP_POST ||
1510             state == SERVICE_FINAL_SIGTERM ||
1511             state == SERVICE_FINAL_SIGKILL ||
1512             state == SERVICE_FAILED ||
1513             state == SERVICE_AUTO_RESTART)
1514                 service_notify_sockets_dead(s);
1515
1516         if (state != SERVICE_START_PRE &&
1517             state != SERVICE_START &&
1518             state != SERVICE_START_POST &&
1519             state != SERVICE_RUNNING &&
1520             state != SERVICE_RELOAD &&
1521             state != SERVICE_STOP &&
1522             state != SERVICE_STOP_SIGTERM &&
1523             state != SERVICE_STOP_SIGKILL &&
1524             state != SERVICE_STOP_POST &&
1525             state != SERVICE_FINAL_SIGTERM &&
1526             state != SERVICE_FINAL_SIGKILL &&
1527             !(state == SERVICE_DEAD && UNIT(s)->job)) {
1528                 service_close_socket_fd(s);
1529                 service_connection_unref(s);
1530         }
1531
1532         if (state == SERVICE_STOP)
1533                 service_stop_watchdog(s);
1534
1535         /* For the inactive states unit_notify() will trim the cgroup,
1536          * but for exit we have to do that ourselves... */
1537         if (state == SERVICE_EXITED && UNIT(s)->manager->n_reloading <= 0)
1538                 cgroup_bonding_trim_list(UNIT(s)->cgroup_bondings, true);
1539
1540         if (old_state != state)
1541                 log_debug("%s changed %s -> %s", UNIT(s)->id, service_state_to_string(old_state), service_state_to_string(state));
1542
1543         unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state], s->reload_result == SERVICE_SUCCESS);
1544         s->reload_result = SERVICE_SUCCESS;
1545 }
1546
1547 static int service_coldplug(Unit *u) {
1548         Service *s = SERVICE(u);
1549         int r;
1550
1551         assert(s);
1552         assert(s->state == SERVICE_DEAD);
1553
1554         if (s->deserialized_state != s->state) {
1555
1556                 if (s->deserialized_state == SERVICE_START_PRE ||
1557                     s->deserialized_state == SERVICE_START ||
1558                     s->deserialized_state == SERVICE_START_POST ||
1559                     s->deserialized_state == SERVICE_RELOAD ||
1560                     s->deserialized_state == SERVICE_STOP ||
1561                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1562                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1563                     s->deserialized_state == SERVICE_STOP_POST ||
1564                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1565                     s->deserialized_state == SERVICE_FINAL_SIGKILL ||
1566                     s->deserialized_state == SERVICE_AUTO_RESTART) {
1567
1568                         if (s->deserialized_state == SERVICE_AUTO_RESTART || s->timeout_usec > 0) {
1569                                 usec_t k;
1570
1571                                 k = s->deserialized_state == SERVICE_AUTO_RESTART ? s->restart_usec : s->timeout_usec;
1572
1573                                 if ((r = unit_watch_timer(UNIT(s), k, &s->timer_watch)) < 0)
1574                                         return r;
1575                         }
1576                 }
1577
1578                 if ((s->deserialized_state == SERVICE_START &&
1579                      (s->type == SERVICE_FORKING ||
1580                       s->type == SERVICE_DBUS ||
1581                       s->type == SERVICE_ONESHOT ||
1582                       s->type == SERVICE_NOTIFY)) ||
1583                     s->deserialized_state == SERVICE_START_POST ||
1584                     s->deserialized_state == SERVICE_RUNNING ||
1585                     s->deserialized_state == SERVICE_RELOAD ||
1586                     s->deserialized_state == SERVICE_STOP ||
1587                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1588                     s->deserialized_state == SERVICE_STOP_SIGKILL)
1589                         if (s->main_pid > 0)
1590                                 if ((r = unit_watch_pid(UNIT(s), s->main_pid)) < 0)
1591                                         return r;
1592
1593                 if (s->deserialized_state == SERVICE_START_PRE ||
1594                     s->deserialized_state == SERVICE_START ||
1595                     s->deserialized_state == SERVICE_START_POST ||
1596                     s->deserialized_state == SERVICE_RELOAD ||
1597                     s->deserialized_state == SERVICE_STOP ||
1598                     s->deserialized_state == SERVICE_STOP_SIGTERM ||
1599                     s->deserialized_state == SERVICE_STOP_SIGKILL ||
1600                     s->deserialized_state == SERVICE_STOP_POST ||
1601                     s->deserialized_state == SERVICE_FINAL_SIGTERM ||
1602                     s->deserialized_state == SERVICE_FINAL_SIGKILL)
1603                         if (s->control_pid > 0)
1604                                 if ((r = unit_watch_pid(UNIT(s), s->control_pid)) < 0)
1605                                         return r;
1606
1607                 if (s->deserialized_state == SERVICE_START_POST ||
1608                     s->deserialized_state == SERVICE_RUNNING)
1609                         service_handle_watchdog(s);
1610
1611                 service_set_state(s, s->deserialized_state);
1612         }
1613         return 0;
1614 }
1615
1616 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1617         Iterator i;
1618         int r;
1619         int *rfds = NULL;
1620         unsigned rn_fds = 0;
1621         Unit *u;
1622
1623         assert(s);
1624         assert(fds);
1625         assert(n_fds);
1626
1627         if (s->socket_fd >= 0)
1628                 return 0;
1629
1630         SET_FOREACH(u, UNIT(s)->dependencies[UNIT_TRIGGERED_BY], i) {
1631                 int *cfds;
1632                 unsigned cn_fds;
1633                 Socket *sock;
1634
1635                 if (u->type != UNIT_SOCKET)
1636                         continue;
1637
1638                 sock = SOCKET(u);
1639
1640                 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1641                         goto fail;
1642
1643                 if (!cfds)
1644                         continue;
1645
1646                 if (!rfds) {
1647                         rfds = cfds;
1648                         rn_fds = cn_fds;
1649                 } else {
1650                         int *t;
1651
1652                         if (!(t = new(int, rn_fds+cn_fds))) {
1653                                 free(cfds);
1654                                 r = -ENOMEM;
1655                                 goto fail;
1656                         }
1657
1658                         memcpy(t, rfds, rn_fds * sizeof(int));
1659                         memcpy(t+rn_fds, cfds, cn_fds * sizeof(int));
1660                         free(rfds);
1661                         free(cfds);
1662
1663                         rfds = t;
1664                         rn_fds = rn_fds+cn_fds;
1665                 }
1666         }
1667
1668         *fds = rfds;
1669         *n_fds = rn_fds;
1670
1671         return 0;
1672
1673 fail:
1674         free(rfds);
1675
1676         return r;
1677 }
1678
1679 static int service_spawn(
1680                 Service *s,
1681                 ExecCommand *c,
1682                 bool timeout,
1683                 bool pass_fds,
1684                 bool apply_permissions,
1685                 bool apply_chroot,
1686                 bool apply_tty_stdin,
1687                 bool set_notify_socket,
1688                 pid_t *_pid) {
1689
1690         pid_t pid;
1691         int r;
1692         int *fds = NULL, *fdsbuf = NULL;
1693         unsigned n_fds = 0, n_env = 0;
1694         char **argv = NULL, **final_env = NULL, **our_env = NULL;
1695
1696         assert(s);
1697         assert(c);
1698         assert(_pid);
1699
1700         if (pass_fds ||
1701             s->exec_context.std_input == EXEC_INPUT_SOCKET ||
1702             s->exec_context.std_output == EXEC_OUTPUT_SOCKET ||
1703             s->exec_context.std_error == EXEC_OUTPUT_SOCKET) {
1704
1705                 if (s->socket_fd >= 0) {
1706                         fds = &s->socket_fd;
1707                         n_fds = 1;
1708                 } else {
1709                         if ((r = service_collect_fds(s, &fdsbuf, &n_fds)) < 0)
1710                                 goto fail;
1711
1712                         fds = fdsbuf;
1713                 }
1714         }
1715
1716         if (timeout && s->timeout_usec) {
1717                 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1718                         goto fail;
1719         } else
1720                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1721
1722         if (!(argv = unit_full_printf_strv(UNIT(s), c->argv))) {
1723                 r = -ENOMEM;
1724                 goto fail;
1725         }
1726
1727         if (!(our_env = new0(char*, 4))) {
1728                 r = -ENOMEM;
1729                 goto fail;
1730         }
1731
1732         if (set_notify_socket)
1733                 if (asprintf(our_env + n_env++, "NOTIFY_SOCKET=%s", UNIT(s)->manager->notify_socket) < 0) {
1734                         r = -ENOMEM;
1735                         goto fail;
1736                 }
1737
1738         if (s->main_pid > 0)
1739                 if (asprintf(our_env + n_env++, "MAINPID=%lu", (unsigned long) s->main_pid) < 0) {
1740                         r = -ENOMEM;
1741                         goto fail;
1742                 }
1743
1744         if (s->watchdog_usec > 0)
1745                 if (asprintf(our_env + n_env++, "WATCHDOG_USEC=%llu", (unsigned long long) s->watchdog_usec) < 0) {
1746                         r = -ENOMEM;
1747                         goto fail;
1748                 }
1749
1750         if (!(final_env = strv_env_merge(2,
1751                                          UNIT(s)->manager->environment,
1752                                          our_env,
1753                                          NULL))) {
1754                 r = -ENOMEM;
1755                 goto fail;
1756         }
1757
1758         r = exec_spawn(c,
1759                        argv,
1760                        &s->exec_context,
1761                        fds, n_fds,
1762                        final_env,
1763                        apply_permissions,
1764                        apply_chroot,
1765                        apply_tty_stdin,
1766                        UNIT(s)->manager->confirm_spawn,
1767                        UNIT(s)->cgroup_bondings,
1768                        UNIT(s)->cgroup_attributes,
1769                        &pid);
1770
1771         if (r < 0)
1772                 goto fail;
1773
1774
1775         if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1776                 /* FIXME: we need to do something here */
1777                 goto fail;
1778
1779         free(fdsbuf);
1780         strv_free(argv);
1781         strv_free(our_env);
1782         strv_free(final_env);
1783
1784         *_pid = pid;
1785
1786         return 0;
1787
1788 fail:
1789         free(fdsbuf);
1790         strv_free(argv);
1791         strv_free(our_env);
1792         strv_free(final_env);
1793
1794         if (timeout)
1795                 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1796
1797         return r;
1798 }
1799
1800 static int main_pid_good(Service *s) {
1801         assert(s);
1802
1803         /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1804          * don't know */
1805
1806         /* If we know the pid file, then lets just check if it is
1807          * still valid */
1808         if (s->main_pid_known) {
1809
1810                 /* If it's an alien child let's check if it is still
1811                  * alive ... */
1812                 if (s->main_pid_alien)
1813                         return kill(s->main_pid, 0) >= 0 || errno != ESRCH;
1814
1815                 /* .. otherwise assume we'll get a SIGCHLD for it,
1816                  * which we really should wait for to collect exit
1817                  * status and code */
1818                 return s->main_pid > 0;
1819         }
1820
1821         /* We don't know the pid */
1822         return -EAGAIN;
1823 }
1824
1825 static int control_pid_good(Service *s) {
1826         assert(s);
1827
1828         return s->control_pid > 0;
1829 }
1830
1831 static int cgroup_good(Service *s) {
1832         int r;
1833
1834         assert(s);
1835
1836         if ((r = cgroup_bonding_is_empty_list(UNIT(s)->cgroup_bondings)) < 0)
1837                 return r;
1838
1839         return !r;
1840 }
1841
1842 static void service_enter_dead(Service *s, ServiceResult f, bool allow_restart) {
1843         int r;
1844         assert(s);
1845
1846         if (f != SERVICE_SUCCESS)
1847                 s->result = f;
1848
1849         if (allow_restart &&
1850             !s->forbid_restart &&
1851             (s->restart == SERVICE_RESTART_ALWAYS ||
1852              (s->restart == SERVICE_RESTART_ON_SUCCESS && s->result == SERVICE_SUCCESS) ||
1853              (s->restart == SERVICE_RESTART_ON_FAILURE && s->result != SERVICE_SUCCESS) ||
1854              (s->restart == SERVICE_RESTART_ON_ABORT && (s->result == SERVICE_FAILURE_SIGNAL ||
1855                                                          s->result == SERVICE_FAILURE_CORE_DUMP)))) {
1856
1857                 r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch);
1858                 if (r < 0)
1859                         goto fail;
1860
1861                 service_set_state(s, SERVICE_AUTO_RESTART);
1862         } else
1863                 service_set_state(s, s->result != SERVICE_SUCCESS ? SERVICE_FAILED : SERVICE_DEAD);
1864
1865         s->forbid_restart = false;
1866
1867         return;
1868
1869 fail:
1870         log_warning("%s failed to run install restart timer: %s", UNIT(s)->id, strerror(-r));
1871         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
1872 }
1873
1874 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f);
1875
1876 static void service_enter_stop_post(Service *s, ServiceResult f) {
1877         int r;
1878         assert(s);
1879
1880         if (f != SERVICE_SUCCESS)
1881                 s->result = f;
1882
1883         service_unwatch_control_pid(s);
1884
1885         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST])) {
1886                 s->control_command_id = SERVICE_EXEC_STOP_POST;
1887
1888                 if ((r = service_spawn(s,
1889                                        s->control_command,
1890                                        true,
1891                                        false,
1892                                        !s->permissions_start_only,
1893                                        !s->root_directory_start_only,
1894                                        true,
1895                                        false,
1896                                        &s->control_pid)) < 0)
1897                         goto fail;
1898
1899
1900                 service_set_state(s, SERVICE_STOP_POST);
1901         } else
1902                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_SUCCESS);
1903
1904         return;
1905
1906 fail:
1907         log_warning("%s failed to run 'stop-post' task: %s", UNIT(s)->id, strerror(-r));
1908         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
1909 }
1910
1911 static void service_enter_signal(Service *s, ServiceState state, ServiceResult f) {
1912         int r;
1913         Set *pid_set = NULL;
1914         bool wait_for_exit = false;
1915
1916         assert(s);
1917
1918         if (f != SERVICE_SUCCESS)
1919                 s->result = f;
1920
1921         if (s->exec_context.kill_mode != KILL_NONE) {
1922                 int sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? s->exec_context.kill_signal : SIGKILL;
1923
1924                 if (s->main_pid > 0) {
1925                         if (kill_and_sigcont(s->main_pid, sig) < 0 && errno != ESRCH)
1926                                 log_warning("Failed to kill main process %li: %m", (long) s->main_pid);
1927                         else
1928                                 wait_for_exit = !s->main_pid_alien;
1929                 }
1930
1931                 if (s->control_pid > 0) {
1932                         if (kill_and_sigcont(s->control_pid, sig) < 0 && errno != ESRCH)
1933                                 log_warning("Failed to kill control process %li: %m", (long) s->control_pid);
1934                         else
1935                                 wait_for_exit = true;
1936                 }
1937
1938                 if (s->exec_context.kill_mode == KILL_CONTROL_GROUP) {
1939
1940                         if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func))) {
1941                                 r = -ENOMEM;
1942                                 goto fail;
1943                         }
1944
1945                         /* Exclude the main/control pids from being killed via the cgroup */
1946                         if (s->main_pid > 0)
1947                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0)
1948                                         goto fail;
1949
1950                         if (s->control_pid > 0)
1951                                 if ((r = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0)
1952                                         goto fail;
1953
1954                         if ((r = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, sig, true, pid_set)) < 0) {
1955                                 if (r != -EAGAIN && r != -ESRCH && r != -ENOENT)
1956                                         log_warning("Failed to kill control group: %s", strerror(-r));
1957                         } else if (r > 0)
1958                                 wait_for_exit = true;
1959
1960                         set_free(pid_set);
1961                         pid_set = NULL;
1962                 }
1963         }
1964
1965         if (wait_for_exit) {
1966                 if (s->timeout_usec > 0)
1967                         if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1968                                 goto fail;
1969
1970                 service_set_state(s, state);
1971         } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1972                 service_enter_stop_post(s, SERVICE_SUCCESS);
1973         else
1974                 service_enter_dead(s, SERVICE_SUCCESS, true);
1975
1976         return;
1977
1978 fail:
1979         log_warning("%s failed to kill processes: %s", UNIT(s)->id, strerror(-r));
1980
1981         if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1982                 service_enter_stop_post(s, SERVICE_FAILURE_RESOURCES);
1983         else
1984                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
1985
1986         if (pid_set)
1987                 set_free(pid_set);
1988 }
1989
1990 static void service_enter_stop(Service *s, ServiceResult f) {
1991         int r;
1992
1993         assert(s);
1994
1995         if (f != SERVICE_SUCCESS)
1996                 s->result = f;
1997
1998         service_unwatch_control_pid(s);
1999
2000         if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP])) {
2001                 s->control_command_id = SERVICE_EXEC_STOP;
2002
2003                 if ((r = service_spawn(s,
2004                                        s->control_command,
2005                                        true,
2006                                        false,
2007                                        !s->permissions_start_only,
2008                                        !s->root_directory_start_only,
2009                                        false,
2010                                        false,
2011                                        &s->control_pid)) < 0)
2012                         goto fail;
2013
2014                 service_set_state(s, SERVICE_STOP);
2015         } else
2016                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2017
2018         return;
2019
2020 fail:
2021         log_warning("%s failed to run 'stop' task: %s", UNIT(s)->id, strerror(-r));
2022         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2023 }
2024
2025 static void service_enter_running(Service *s, ServiceResult f) {
2026         int main_pid_ok, cgroup_ok;
2027         assert(s);
2028
2029         if (f != SERVICE_SUCCESS)
2030                 s->result = f;
2031
2032         main_pid_ok = main_pid_good(s);
2033         cgroup_ok = cgroup_good(s);
2034
2035         if ((main_pid_ok > 0 || (main_pid_ok < 0 && cgroup_ok != 0)) &&
2036             (s->bus_name_good || s->type != SERVICE_DBUS))
2037                 service_set_state(s, SERVICE_RUNNING);
2038         else if (s->remain_after_exit)
2039                 service_set_state(s, SERVICE_EXITED);
2040         else
2041                 service_enter_stop(s, SERVICE_SUCCESS);
2042 }
2043
2044 static void service_enter_start_post(Service *s) {
2045         int r;
2046         assert(s);
2047
2048         service_unwatch_control_pid(s);
2049
2050         if (s->watchdog_usec > 0)
2051                 service_reset_watchdog(s);
2052
2053         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST])) {
2054                 s->control_command_id = SERVICE_EXEC_START_POST;
2055
2056                 if ((r = service_spawn(s,
2057                                        s->control_command,
2058                                        true,
2059                                        false,
2060                                        !s->permissions_start_only,
2061                                        !s->root_directory_start_only,
2062                                        false,
2063                                        false,
2064                                        &s->control_pid)) < 0)
2065                         goto fail;
2066
2067                 service_set_state(s, SERVICE_START_POST);
2068         } else
2069                 service_enter_running(s, SERVICE_SUCCESS);
2070
2071         return;
2072
2073 fail:
2074         log_warning("%s failed to run 'start-post' task: %s", UNIT(s)->id, strerror(-r));
2075         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2076 }
2077
2078 static void service_enter_start(Service *s) {
2079         pid_t pid;
2080         int r;
2081         ExecCommand *c;
2082
2083         assert(s);
2084
2085         assert(s->exec_command[SERVICE_EXEC_START]);
2086         assert(!s->exec_command[SERVICE_EXEC_START]->command_next || s->type == SERVICE_ONESHOT);
2087
2088         if (s->type == SERVICE_FORKING)
2089                 service_unwatch_control_pid(s);
2090         else
2091                 service_unwatch_main_pid(s);
2092
2093         /* We want to ensure that nobody leaks processes from
2094          * START_PRE here, so let's go on a killing spree, People
2095          * should not spawn long running processes from START_PRE. */
2096         cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, NULL);
2097
2098         if (s->type == SERVICE_FORKING) {
2099                 s->control_command_id = SERVICE_EXEC_START;
2100                 c = s->control_command = s->exec_command[SERVICE_EXEC_START];
2101
2102                 s->main_command = NULL;
2103         } else {
2104                 s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2105                 s->control_command = NULL;
2106
2107                 c = s->main_command = s->exec_command[SERVICE_EXEC_START];
2108         }
2109
2110         if ((r = service_spawn(s,
2111                                c,
2112                                s->type == SERVICE_FORKING || s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY,
2113                                true,
2114                                true,
2115                                true,
2116                                true,
2117                                s->notify_access != NOTIFY_NONE,
2118                                &pid)) < 0)
2119                 goto fail;
2120
2121         if (s->type == SERVICE_SIMPLE) {
2122                 /* For simple services we immediately start
2123                  * the START_POST binaries. */
2124
2125                 service_set_main_pid(s, pid);
2126                 service_enter_start_post(s);
2127
2128         } else  if (s->type == SERVICE_FORKING) {
2129
2130                 /* For forking services we wait until the start
2131                  * process exited. */
2132
2133                 s->control_pid = pid;
2134                 service_set_state(s, SERVICE_START);
2135
2136         } else if (s->type == SERVICE_ONESHOT ||
2137                    s->type == SERVICE_DBUS ||
2138                    s->type == SERVICE_NOTIFY) {
2139
2140                 /* For oneshot services we wait until the start
2141                  * process exited, too, but it is our main process. */
2142
2143                 /* For D-Bus services we know the main pid right away,
2144                  * but wait for the bus name to appear on the
2145                  * bus. Notify services are similar. */
2146
2147                 service_set_main_pid(s, pid);
2148                 service_set_state(s, SERVICE_START);
2149         } else
2150                 assert_not_reached("Unknown service type");
2151
2152         return;
2153
2154 fail:
2155         log_warning("%s failed to run 'start' task: %s", UNIT(s)->id, strerror(-r));
2156         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2157 }
2158
2159 static void service_enter_start_pre(Service *s) {
2160         int r;
2161
2162         assert(s);
2163
2164         service_unwatch_control_pid(s);
2165
2166         if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE])) {
2167
2168                 /* Before we start anything, let's clear up what might
2169                  * be left from previous runs. */
2170                 cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, SIGKILL, true, NULL);
2171
2172                 s->control_command_id = SERVICE_EXEC_START_PRE;
2173
2174                 if ((r = service_spawn(s,
2175                                        s->control_command,
2176                                        true,
2177                                        false,
2178                                        !s->permissions_start_only,
2179                                        !s->root_directory_start_only,
2180                                        true,
2181                                        false,
2182                                        &s->control_pid)) < 0)
2183                         goto fail;
2184
2185                 service_set_state(s, SERVICE_START_PRE);
2186         } else
2187                 service_enter_start(s);
2188
2189         return;
2190
2191 fail:
2192         log_warning("%s failed to run 'start-pre' task: %s", UNIT(s)->id, strerror(-r));
2193         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2194 }
2195
2196 static void service_enter_restart(Service *s) {
2197         int r;
2198         DBusError error;
2199
2200         assert(s);
2201         dbus_error_init(&error);
2202
2203         if (UNIT(s)->job) {
2204                 log_info("Job pending for unit, delaying automatic restart.");
2205
2206                 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
2207                         goto fail;
2208         }
2209
2210         service_enter_dead(s, SERVICE_SUCCESS, false);
2211
2212         if ((r = manager_add_job(UNIT(s)->manager, JOB_START, UNIT(s), JOB_FAIL, false, &error, NULL)) < 0)
2213                 goto fail;
2214
2215         log_debug("%s scheduled restart job.", UNIT(s)->id);
2216         return;
2217
2218 fail:
2219         log_warning("%s failed to schedule restart job: %s", UNIT(s)->id, bus_error(&error, -r));
2220         service_enter_dead(s, SERVICE_FAILURE_RESOURCES, false);
2221
2222         dbus_error_free(&error);
2223 }
2224
2225 static void service_enter_reload(Service *s) {
2226         int r;
2227
2228         assert(s);
2229
2230         service_unwatch_control_pid(s);
2231
2232         if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD])) {
2233                 s->control_command_id = SERVICE_EXEC_RELOAD;
2234
2235                 if ((r = service_spawn(s,
2236                                        s->control_command,
2237                                        true,
2238                                        false,
2239                                        !s->permissions_start_only,
2240                                        !s->root_directory_start_only,
2241                                        false,
2242                                        false,
2243                                        &s->control_pid)) < 0)
2244                         goto fail;
2245
2246                 service_set_state(s, SERVICE_RELOAD);
2247         } else
2248                 service_enter_running(s, SERVICE_SUCCESS);
2249
2250         return;
2251
2252 fail:
2253         log_warning("%s failed to run 'reload' task: %s", UNIT(s)->id, strerror(-r));
2254         s->reload_result = SERVICE_FAILURE_RESOURCES;
2255         service_enter_running(s, SERVICE_SUCCESS);
2256 }
2257
2258 static void service_run_next_control(Service *s) {
2259         int r;
2260
2261         assert(s);
2262         assert(s->control_command);
2263         assert(s->control_command->command_next);
2264
2265         assert(s->control_command_id != SERVICE_EXEC_START);
2266
2267         s->control_command = s->control_command->command_next;
2268         service_unwatch_control_pid(s);
2269
2270         if ((r = service_spawn(s,
2271                                s->control_command,
2272                                true,
2273                                false,
2274                                !s->permissions_start_only,
2275                                !s->root_directory_start_only,
2276                                s->control_command_id == SERVICE_EXEC_START_PRE ||
2277                                s->control_command_id == SERVICE_EXEC_STOP_POST,
2278                                false,
2279                                &s->control_pid)) < 0)
2280                 goto fail;
2281
2282         return;
2283
2284 fail:
2285         log_warning("%s failed to run next control task: %s", UNIT(s)->id, strerror(-r));
2286
2287         if (s->state == SERVICE_START_PRE)
2288                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2289         else if (s->state == SERVICE_STOP)
2290                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2291         else if (s->state == SERVICE_STOP_POST)
2292                 service_enter_dead(s, SERVICE_FAILURE_RESOURCES, true);
2293         else if (s->state == SERVICE_RELOAD) {
2294                 s->reload_result = SERVICE_FAILURE_RESOURCES;
2295                 service_enter_running(s, SERVICE_SUCCESS);
2296         } else
2297                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2298 }
2299
2300 static void service_run_next_main(Service *s) {
2301         pid_t pid;
2302         int r;
2303
2304         assert(s);
2305         assert(s->main_command);
2306         assert(s->main_command->command_next);
2307         assert(s->type == SERVICE_ONESHOT);
2308
2309         s->main_command = s->main_command->command_next;
2310         service_unwatch_main_pid(s);
2311
2312         if ((r = service_spawn(s,
2313                                s->main_command,
2314                                false,
2315                                true,
2316                                true,
2317                                true,
2318                                true,
2319                                s->notify_access != NOTIFY_NONE,
2320                                &pid)) < 0)
2321                 goto fail;
2322
2323         service_set_main_pid(s, pid);
2324
2325         return;
2326
2327 fail:
2328         log_warning("%s failed to run next main task: %s", UNIT(s)->id, strerror(-r));
2329         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2330 }
2331
2332 static int service_start_limit_test(Service *s) {
2333         assert(s);
2334
2335         if (ratelimit_test(&s->start_limit))
2336                 return 0;
2337
2338         switch (s->start_limit_action) {
2339
2340         case SERVICE_START_LIMIT_NONE:
2341                 log_warning("%s start request repeated too quickly, refusing to start.", UNIT(s)->id);
2342                 break;
2343
2344         case SERVICE_START_LIMIT_REBOOT: {
2345                 DBusError error;
2346                 int r;
2347
2348                 dbus_error_init(&error);
2349
2350                 log_warning("%s start request repeated too quickly, rebooting.", UNIT(s)->id);
2351
2352                 r = manager_add_job_by_name(UNIT(s)->manager, JOB_START, SPECIAL_REBOOT_TARGET, JOB_REPLACE, true, &error, NULL);
2353                 if (r < 0) {
2354                         log_error("Failed to reboot: %s.", bus_error(&error, r));
2355                         dbus_error_free(&error);
2356                 }
2357
2358                 break;
2359         }
2360
2361         case SERVICE_START_LIMIT_REBOOT_FORCE:
2362                 log_warning("%s start request repeated too quickly, force rebooting.", UNIT(s)->id);
2363                 UNIT(s)->manager->exit_code = MANAGER_REBOOT;
2364                 break;
2365
2366         case SERVICE_START_LIMIT_REBOOT_IMMEDIATE:
2367                 log_warning("%s start request repeated too quickly, rebooting immediately.", UNIT(s)->id);
2368                 reboot(RB_AUTOBOOT);
2369                 break;
2370
2371         default:
2372                 log_error("start limit action=%i", s->start_limit_action);
2373                 assert_not_reached("Unknown StartLimitAction.");
2374         }
2375
2376         return -ECANCELED;
2377 }
2378
2379 static int service_start(Unit *u) {
2380         Service *s = SERVICE(u);
2381         int r;
2382
2383         assert(s);
2384
2385         /* We cannot fulfill this request right now, try again later
2386          * please! */
2387         if (s->state == SERVICE_STOP ||
2388             s->state == SERVICE_STOP_SIGTERM ||
2389             s->state == SERVICE_STOP_SIGKILL ||
2390             s->state == SERVICE_STOP_POST ||
2391             s->state == SERVICE_FINAL_SIGTERM ||
2392             s->state == SERVICE_FINAL_SIGKILL)
2393                 return -EAGAIN;
2394
2395         /* Already on it! */
2396         if (s->state == SERVICE_START_PRE ||
2397             s->state == SERVICE_START ||
2398             s->state == SERVICE_START_POST)
2399                 return 0;
2400
2401         assert(s->state == SERVICE_DEAD || s->state == SERVICE_FAILED || s->state == SERVICE_AUTO_RESTART);
2402
2403         /* Make sure we don't enter a busy loop of some kind. */
2404         r = service_start_limit_test(s);
2405         if (r < 0)
2406                 return r;
2407
2408         s->result = SERVICE_SUCCESS;
2409         s->reload_result = SERVICE_SUCCESS;
2410         s->main_pid_known = false;
2411         s->main_pid_alien = false;
2412         s->forbid_restart = false;
2413
2414         service_enter_start_pre(s);
2415         return 0;
2416 }
2417
2418 static int service_stop(Unit *u) {
2419         Service *s = SERVICE(u);
2420
2421         assert(s);
2422
2423         /* This is a user request, so don't do restarts on this
2424          * shutdown. */
2425         s->forbid_restart = true;
2426
2427         /* Already on it */
2428         if (s->state == SERVICE_STOP ||
2429             s->state == SERVICE_STOP_SIGTERM ||
2430             s->state == SERVICE_STOP_SIGKILL ||
2431             s->state == SERVICE_STOP_POST ||
2432             s->state == SERVICE_FINAL_SIGTERM ||
2433             s->state == SERVICE_FINAL_SIGKILL)
2434                 return 0;
2435
2436         /* Don't allow a restart */
2437         if (s->state == SERVICE_AUTO_RESTART) {
2438                 service_set_state(s, SERVICE_DEAD);
2439                 return 0;
2440         }
2441
2442         /* If there's already something running we go directly into
2443          * kill mode. */
2444         if (s->state == SERVICE_START_PRE ||
2445             s->state == SERVICE_START ||
2446             s->state == SERVICE_START_POST ||
2447             s->state == SERVICE_RELOAD) {
2448                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_SUCCESS);
2449                 return 0;
2450         }
2451
2452         assert(s->state == SERVICE_RUNNING ||
2453                s->state == SERVICE_EXITED);
2454
2455         service_enter_stop(s, SERVICE_SUCCESS);
2456         return 0;
2457 }
2458
2459 static int service_reload(Unit *u) {
2460         Service *s = SERVICE(u);
2461
2462         assert(s);
2463
2464         assert(s->state == SERVICE_RUNNING || s->state == SERVICE_EXITED);
2465
2466         service_enter_reload(s);
2467         return 0;
2468 }
2469
2470 static bool service_can_reload(Unit *u) {
2471         Service *s = SERVICE(u);
2472
2473         assert(s);
2474
2475         return !!s->exec_command[SERVICE_EXEC_RELOAD];
2476 }
2477
2478 static int service_serialize(Unit *u, FILE *f, FDSet *fds) {
2479         Service *s = SERVICE(u);
2480
2481         assert(u);
2482         assert(f);
2483         assert(fds);
2484
2485         unit_serialize_item(u, f, "state", service_state_to_string(s->state));
2486         unit_serialize_item(u, f, "result", service_result_to_string(s->result));
2487         unit_serialize_item(u, f, "reload-result", service_result_to_string(s->reload_result));
2488
2489         if (s->control_pid > 0)
2490                 unit_serialize_item_format(u, f, "control-pid", "%lu", (unsigned long) s->control_pid);
2491
2492         if (s->main_pid_known && s->main_pid > 0)
2493                 unit_serialize_item_format(u, f, "main-pid", "%lu", (unsigned long) s->main_pid);
2494
2495         unit_serialize_item(u, f, "main-pid-known", yes_no(s->main_pid_known));
2496
2497         if (s->status_text)
2498                 unit_serialize_item(u, f, "status-text", s->status_text);
2499
2500         /* FIXME: There's a minor uncleanliness here: if there are
2501          * multiple commands attached here, we will start from the
2502          * first one again */
2503         if (s->control_command_id >= 0)
2504                 unit_serialize_item(u, f, "control-command", service_exec_command_to_string(s->control_command_id));
2505
2506         if (s->socket_fd >= 0) {
2507                 int copy;
2508
2509                 if ((copy = fdset_put_dup(fds, s->socket_fd)) < 0)
2510                         return copy;
2511
2512                 unit_serialize_item_format(u, f, "socket-fd", "%i", copy);
2513         }
2514
2515         if (s->main_exec_status.pid > 0) {
2516                 unit_serialize_item_format(u, f, "main-exec-status-pid", "%lu", (unsigned long) s->main_exec_status.pid);
2517                 dual_timestamp_serialize(f, "main-exec-status-start", &s->main_exec_status.start_timestamp);
2518                 dual_timestamp_serialize(f, "main-exec-status-exit", &s->main_exec_status.exit_timestamp);
2519
2520                 if (dual_timestamp_is_set(&s->main_exec_status.exit_timestamp)) {
2521                         unit_serialize_item_format(u, f, "main-exec-status-code", "%i", s->main_exec_status.code);
2522                         unit_serialize_item_format(u, f, "main-exec-status-status", "%i", s->main_exec_status.status);
2523                 }
2524         }
2525         if (dual_timestamp_is_set(&s->watchdog_timestamp))
2526                 dual_timestamp_serialize(f, "watchdog-timestamp", &s->watchdog_timestamp);
2527
2528         return 0;
2529 }
2530
2531 static int service_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
2532         Service *s = SERVICE(u);
2533
2534         assert(u);
2535         assert(key);
2536         assert(value);
2537         assert(fds);
2538
2539         if (streq(key, "state")) {
2540                 ServiceState state;
2541
2542                 if ((state = service_state_from_string(value)) < 0)
2543                         log_debug("Failed to parse state value %s", value);
2544                 else
2545                         s->deserialized_state = state;
2546         } else if (streq(key, "result")) {
2547                 ServiceResult f;
2548
2549                 f = service_result_from_string(value);
2550                 if (f < 0)
2551                         log_debug("Failed to parse result value %s", value);
2552                 else if (f != SERVICE_SUCCESS)
2553                         s->result = f;
2554
2555         } else if (streq(key, "reload-result")) {
2556                 ServiceResult f;
2557
2558                 f = service_result_from_string(value);
2559                 if (f < 0)
2560                         log_debug("Failed to parse reload result value %s", value);
2561                 else if (f != SERVICE_SUCCESS)
2562                         s->reload_result = f;
2563
2564         } else if (streq(key, "control-pid")) {
2565                 pid_t pid;
2566
2567                 if (parse_pid(value, &pid) < 0)
2568                         log_debug("Failed to parse control-pid value %s", value);
2569                 else
2570                         s->control_pid = pid;
2571         } else if (streq(key, "main-pid")) {
2572                 pid_t pid;
2573
2574                 if (parse_pid(value, &pid) < 0)
2575                         log_debug("Failed to parse main-pid value %s", value);
2576                 else
2577                         service_set_main_pid(s, (pid_t) pid);
2578         } else if (streq(key, "main-pid-known")) {
2579                 int b;
2580
2581                 if ((b = parse_boolean(value)) < 0)
2582                         log_debug("Failed to parse main-pid-known value %s", value);
2583                 else
2584                         s->main_pid_known = b;
2585         } else if (streq(key, "status-text")) {
2586                 char *t;
2587
2588                 if ((t = strdup(value))) {
2589                         free(s->status_text);
2590                         s->status_text = t;
2591                 }
2592
2593         } else if (streq(key, "control-command")) {
2594                 ServiceExecCommand id;
2595
2596                 if ((id = service_exec_command_from_string(value)) < 0)
2597                         log_debug("Failed to parse exec-command value %s", value);
2598                 else {
2599                         s->control_command_id = id;
2600                         s->control_command = s->exec_command[id];
2601                 }
2602         } else if (streq(key, "socket-fd")) {
2603                 int fd;
2604
2605                 if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd))
2606                         log_debug("Failed to parse socket-fd value %s", value);
2607                 else {
2608
2609                         if (s->socket_fd >= 0)
2610                                 close_nointr_nofail(s->socket_fd);
2611                         s->socket_fd = fdset_remove(fds, fd);
2612                 }
2613         } else if (streq(key, "main-exec-status-pid")) {
2614                 pid_t pid;
2615
2616                 if (parse_pid(value, &pid) < 0)
2617                         log_debug("Failed to parse main-exec-status-pid value %s", value);
2618                 else
2619                         s->main_exec_status.pid = pid;
2620         } else if (streq(key, "main-exec-status-code")) {
2621                 int i;
2622
2623                 if (safe_atoi(value, &i) < 0)
2624                         log_debug("Failed to parse main-exec-status-code value %s", value);
2625                 else
2626                         s->main_exec_status.code = i;
2627         } else if (streq(key, "main-exec-status-status")) {
2628                 int i;
2629
2630                 if (safe_atoi(value, &i) < 0)
2631                         log_debug("Failed to parse main-exec-status-status value %s", value);
2632                 else
2633                         s->main_exec_status.status = i;
2634         } else if (streq(key, "main-exec-status-start"))
2635                 dual_timestamp_deserialize(value, &s->main_exec_status.start_timestamp);
2636         else if (streq(key, "main-exec-status-exit"))
2637                 dual_timestamp_deserialize(value, &s->main_exec_status.exit_timestamp);
2638         else if (streq(key, "watchdog-timestamp"))
2639                 dual_timestamp_deserialize(value, &s->watchdog_timestamp);
2640         else
2641                 log_debug("Unknown serialization key '%s'", key);
2642
2643         return 0;
2644 }
2645
2646 static UnitActiveState service_active_state(Unit *u) {
2647         assert(u);
2648
2649         return state_translation_table[SERVICE(u)->state];
2650 }
2651
2652 static const char *service_sub_state_to_string(Unit *u) {
2653         assert(u);
2654
2655         return service_state_to_string(SERVICE(u)->state);
2656 }
2657
2658 static bool service_check_gc(Unit *u) {
2659         Service *s = SERVICE(u);
2660
2661         assert(s);
2662
2663         /* Never clean up services that still have a process around,
2664          * even if the service is formally dead. */
2665         if (cgroup_good(s) > 0 ||
2666             main_pid_good(s) > 0 ||
2667             control_pid_good(s) > 0)
2668                 return true;
2669
2670 #ifdef HAVE_SYSV_COMPAT
2671         if (s->sysv_path)
2672                 return true;
2673 #endif
2674
2675         return false;
2676 }
2677
2678 static bool service_check_snapshot(Unit *u) {
2679         Service *s = SERVICE(u);
2680
2681         assert(s);
2682
2683         return !s->got_socket_fd;
2684 }
2685
2686 static int service_retry_pid_file(Service *s) {
2687         int r;
2688
2689         assert(s->pid_file);
2690         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2691
2692         r = service_load_pid_file(s, false);
2693         if (r < 0)
2694                 return r;
2695
2696         service_unwatch_pid_file(s);
2697
2698         service_enter_running(s, SERVICE_SUCCESS);
2699         return 0;
2700 }
2701
2702 static int service_watch_pid_file(Service *s) {
2703         int r;
2704
2705         log_debug("Setting watch for %s's PID file %s", UNIT(s)->id, s->pid_file_pathspec->path);
2706         r = path_spec_watch(s->pid_file_pathspec, UNIT(s));
2707         if (r < 0)
2708                 goto fail;
2709
2710         /* the pidfile might have appeared just before we set the watch */
2711         service_retry_pid_file(s);
2712
2713         return 0;
2714 fail:
2715         log_error("Failed to set a watch for %s's PID file %s: %s",
2716                   UNIT(s)->id, s->pid_file_pathspec->path, strerror(-r));
2717         service_unwatch_pid_file(s);
2718         return r;
2719 }
2720
2721 static int service_demand_pid_file(Service *s) {
2722         PathSpec *ps;
2723
2724         assert(s->pid_file);
2725         assert(!s->pid_file_pathspec);
2726
2727         ps = new0(PathSpec, 1);
2728         if (!ps)
2729                 return -ENOMEM;
2730
2731         ps->path = strdup(s->pid_file);
2732         if (!ps->path) {
2733                 free(ps);
2734                 return -ENOMEM;
2735         }
2736
2737         path_kill_slashes(ps->path);
2738
2739         /* PATH_CHANGED would not be enough. There are daemons (sendmail) that
2740          * keep their PID file open all the time. */
2741         ps->type = PATH_MODIFIED;
2742         ps->inotify_fd = -1;
2743
2744         s->pid_file_pathspec = ps;
2745
2746         return service_watch_pid_file(s);
2747 }
2748
2749 static void service_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
2750         Service *s = SERVICE(u);
2751
2752         assert(s);
2753         assert(fd >= 0);
2754         assert(s->state == SERVICE_START || s->state == SERVICE_START_POST);
2755         assert(s->pid_file_pathspec);
2756         assert(path_spec_owns_inotify_fd(s->pid_file_pathspec, fd));
2757
2758         log_debug("inotify event for %s", u->id);
2759
2760         if (path_spec_fd_event(s->pid_file_pathspec, events) < 0)
2761                 goto fail;
2762
2763         if (service_retry_pid_file(s) == 0)
2764                 return;
2765
2766         if (service_watch_pid_file(s) < 0)
2767                 goto fail;
2768
2769         return;
2770 fail:
2771         service_unwatch_pid_file(s);
2772         service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_RESOURCES);
2773 }
2774
2775 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
2776         Service *s = SERVICE(u);
2777         ServiceResult f;
2778
2779         assert(s);
2780         assert(pid >= 0);
2781
2782         if (UNIT(s)->fragment_path ? is_clean_exit(code, status) : is_clean_exit_lsb(code, status))
2783                 f = SERVICE_SUCCESS;
2784         else if (code == CLD_EXITED)
2785                 f = SERVICE_FAILURE_EXIT_CODE;
2786         else if (code == CLD_KILLED)
2787                 f = SERVICE_FAILURE_SIGNAL;
2788         else if (code == CLD_DUMPED)
2789                 f = SERVICE_FAILURE_CORE_DUMP;
2790         else
2791                 assert_not_reached("Unknown code");
2792
2793         if (s->main_pid == pid) {
2794                 /* Forking services may occasionally move to a new PID.
2795                  * As long as they update the PID file before exiting the old
2796                  * PID, they're fine. */
2797                 if (service_load_pid_file(s, false) == 0)
2798                         return;
2799
2800                 s->main_pid = 0;
2801                 exec_status_exit(&s->main_exec_status, &s->exec_context, pid, code, status);
2802
2803                 /* If this is not a forking service than the main
2804                  * process got started and hence we copy the exit
2805                  * status so that it is recorded both as main and as
2806                  * control process exit status */
2807                 if (s->main_command) {
2808                         s->main_command->exec_status = s->main_exec_status;
2809
2810                         if (s->main_command->ignore)
2811                                 f = SERVICE_SUCCESS;
2812                 }
2813
2814                 log_full(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2815                          "%s: main process exited, code=%s, status=%i", u->id, sigchld_code_to_string(code), status);
2816
2817                 if (f != SERVICE_SUCCESS)
2818                         s->result = f;
2819
2820                 if (s->main_command &&
2821                     s->main_command->command_next &&
2822                     f == SERVICE_SUCCESS) {
2823
2824                         /* There is another command to *
2825                          * execute, so let's do that. */
2826
2827                         log_debug("%s running next main command for state %s", u->id, service_state_to_string(s->state));
2828                         service_run_next_main(s);
2829
2830                 } else {
2831
2832                         /* The service exited, so the service is officially
2833                          * gone. */
2834                         s->main_command = NULL;
2835
2836                         switch (s->state) {
2837
2838                         case SERVICE_START_POST:
2839                         case SERVICE_RELOAD:
2840                         case SERVICE_STOP:
2841                                 /* Need to wait until the operation is
2842                                  * done */
2843                                 break;
2844
2845                         case SERVICE_START:
2846                                 if (s->type == SERVICE_ONESHOT) {
2847                                         /* This was our main goal, so let's go on */
2848                                         if (f == SERVICE_SUCCESS)
2849                                                 service_enter_start_post(s);
2850                                         else
2851                                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2852                                         break;
2853                                 } else {
2854                                         assert(s->type == SERVICE_DBUS || s->type == SERVICE_NOTIFY);
2855
2856                                         /* Fall through */
2857                                 }
2858
2859                         case SERVICE_RUNNING:
2860                                 service_enter_running(s, f);
2861                                 break;
2862
2863                         case SERVICE_STOP_SIGTERM:
2864                         case SERVICE_STOP_SIGKILL:
2865
2866                                 if (!control_pid_good(s))
2867                                         service_enter_stop_post(s, f);
2868
2869                                 /* If there is still a control process, wait for that first */
2870                                 break;
2871
2872                         default:
2873                                 assert_not_reached("Uh, main process died at wrong time.");
2874                         }
2875                 }
2876
2877         } else if (s->control_pid == pid) {
2878
2879                 s->control_pid = 0;
2880
2881                 if (s->control_command) {
2882                         exec_status_exit(&s->control_command->exec_status, &s->exec_context, pid, code, status);
2883
2884                         if (s->control_command->ignore)
2885                                 f = SERVICE_SUCCESS;
2886                 }
2887
2888                 log_full(f == SERVICE_SUCCESS ? LOG_DEBUG : LOG_NOTICE,
2889                          "%s: control process exited, code=%s status=%i", u->id, sigchld_code_to_string(code), status);
2890
2891                 if (f != SERVICE_SUCCESS)
2892                         s->result = f;
2893
2894                 if (s->control_command &&
2895                     s->control_command->command_next &&
2896                     f == SERVICE_SUCCESS) {
2897
2898                         /* There is another command to *
2899                          * execute, so let's do that. */
2900
2901                         log_debug("%s running next control command for state %s", u->id, service_state_to_string(s->state));
2902                         service_run_next_control(s);
2903
2904                 } else {
2905                         /* No further commands for this step, so let's
2906                          * figure out what to do next */
2907
2908                         s->control_command = NULL;
2909                         s->control_command_id = _SERVICE_EXEC_COMMAND_INVALID;
2910
2911                         log_debug("%s got final SIGCHLD for state %s", u->id, service_state_to_string(s->state));
2912
2913                         switch (s->state) {
2914
2915                         case SERVICE_START_PRE:
2916                                 if (f == SERVICE_SUCCESS)
2917                                         service_enter_start(s);
2918                                 else
2919                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2920                                 break;
2921
2922                         case SERVICE_START:
2923                                 assert(s->type == SERVICE_FORKING);
2924
2925                                 if (f != SERVICE_SUCCESS) {
2926                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, f);
2927                                         break;
2928                                 }
2929
2930                                 if (s->pid_file) {
2931                                         bool has_start_post;
2932                                         int r;
2933
2934                                         /* Let's try to load the pid file here if we can.
2935                                          * The PID file might actually be created by a START_POST
2936                                          * script. In that case don't worry if the loading fails. */
2937
2938                                         has_start_post = !!s->exec_command[SERVICE_EXEC_START_POST];
2939                                         r = service_load_pid_file(s, !has_start_post);
2940                                         if (!has_start_post && r < 0) {
2941                                                 r = service_demand_pid_file(s);
2942                                                 if (r < 0 || !cgroup_good(s))
2943                                                         service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
2944                                                 break;
2945                                         }
2946                                 } else
2947                                         service_search_main_pid(s);
2948
2949                                 service_enter_start_post(s);
2950                                 break;
2951
2952                         case SERVICE_START_POST:
2953                                 if (f != SERVICE_SUCCESS) {
2954                                         service_enter_stop(s, f);
2955                                         break;
2956                                 }
2957
2958                                 if (s->pid_file) {
2959                                         int r;
2960
2961                                         r = service_load_pid_file(s, true);
2962                                         if (r < 0) {
2963                                                 r = service_demand_pid_file(s);
2964                                                 if (r < 0 || !cgroup_good(s))
2965                                                         service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
2966                                                 break;
2967                                         }
2968                                 } else
2969                                         service_search_main_pid(s);
2970
2971                                 service_enter_running(s, SERVICE_SUCCESS);
2972                                 break;
2973
2974                         case SERVICE_RELOAD:
2975                                 if (f == SERVICE_SUCCESS) {
2976                                         service_load_pid_file(s, true);
2977                                         service_search_main_pid(s);
2978                                 }
2979
2980                                 s->reload_result = f;
2981                                 service_enter_running(s, SERVICE_SUCCESS);
2982                                 break;
2983
2984                         case SERVICE_STOP:
2985                                 service_enter_signal(s, SERVICE_STOP_SIGTERM, f);
2986                                 break;
2987
2988                         case SERVICE_STOP_SIGTERM:
2989                         case SERVICE_STOP_SIGKILL:
2990                                 if (main_pid_good(s) <= 0)
2991                                         service_enter_stop_post(s, f);
2992
2993                                 /* If there is still a service
2994                                  * process around, wait until
2995                                  * that one quit, too */
2996                                 break;
2997
2998                         case SERVICE_STOP_POST:
2999                         case SERVICE_FINAL_SIGTERM:
3000                         case SERVICE_FINAL_SIGKILL:
3001                                 service_enter_dead(s, f, true);
3002                                 break;
3003
3004                         default:
3005                                 assert_not_reached("Uh, control process died at wrong time.");
3006                         }
3007                 }
3008         }
3009
3010         /* Notify clients about changed exit status */
3011         unit_add_to_dbus_queue(u);
3012 }
3013
3014 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
3015         Service *s = SERVICE(u);
3016
3017         assert(s);
3018         assert(elapsed == 1);
3019
3020         if (w == &s->watchdog_watch) {
3021                 service_handle_watchdog(s);
3022                 return;
3023         }
3024
3025         assert(w == &s->timer_watch);
3026
3027         switch (s->state) {
3028
3029         case SERVICE_START_PRE:
3030         case SERVICE_START:
3031                 log_warning("%s operation timed out. Terminating.", u->id);
3032                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3033                 break;
3034
3035         case SERVICE_START_POST:
3036                 log_warning("%s operation timed out. Stopping.", u->id);
3037                 service_enter_stop(s, SERVICE_FAILURE_TIMEOUT);
3038                 break;
3039
3040         case SERVICE_RELOAD:
3041                 log_warning("%s operation timed out. Stopping.", u->id);
3042                 s->reload_result = SERVICE_FAILURE_TIMEOUT;
3043                 service_enter_running(s, SERVICE_SUCCESS);
3044                 break;
3045
3046         case SERVICE_STOP:
3047                 log_warning("%s stopping timed out. Terminating.", u->id);
3048                 service_enter_signal(s, SERVICE_STOP_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3049                 break;
3050
3051         case SERVICE_STOP_SIGTERM:
3052                 if (s->exec_context.send_sigkill) {
3053                         log_warning("%s stopping timed out. Killing.", u->id);
3054                         service_enter_signal(s, SERVICE_STOP_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3055                 } else {
3056                         log_warning("%s stopping timed out. Skipping SIGKILL.", u->id);
3057                         service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3058                 }
3059
3060                 break;
3061
3062         case SERVICE_STOP_SIGKILL:
3063                 /* Uh, we sent a SIGKILL and it is still not gone?
3064                  * Must be something we cannot kill, so let's just be
3065                  * weirded out and continue */
3066
3067                 log_warning("%s still around after SIGKILL. Ignoring.", u->id);
3068                 service_enter_stop_post(s, SERVICE_FAILURE_TIMEOUT);
3069                 break;
3070
3071         case SERVICE_STOP_POST:
3072                 log_warning("%s stopping timed out (2). Terminating.", u->id);
3073                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_TIMEOUT);
3074                 break;
3075
3076         case SERVICE_FINAL_SIGTERM:
3077                 if (s->exec_context.send_sigkill) {
3078                         log_warning("%s stopping timed out (2). Killing.", u->id);
3079                         service_enter_signal(s, SERVICE_FINAL_SIGKILL, SERVICE_FAILURE_TIMEOUT);
3080                 } else {
3081                         log_warning("%s stopping timed out (2). Skipping SIGKILL. Entering failed mode.", u->id);
3082                         service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, false);
3083                 }
3084
3085                 break;
3086
3087         case SERVICE_FINAL_SIGKILL:
3088                 log_warning("%s still around after SIGKILL (2). Entering failed mode.", u->id);
3089                 service_enter_dead(s, SERVICE_FAILURE_TIMEOUT, true);
3090                 break;
3091
3092         case SERVICE_AUTO_RESTART:
3093                 log_info("%s holdoff time over, scheduling restart.", u->id);
3094                 service_enter_restart(s);
3095                 break;
3096
3097         default:
3098                 assert_not_reached("Timeout at wrong time.");
3099         }
3100 }
3101
3102 static void service_cgroup_notify_event(Unit *u) {
3103         Service *s = SERVICE(u);
3104
3105         assert(u);
3106
3107         log_debug("%s: cgroup is empty", u->id);
3108
3109         switch (s->state) {
3110
3111                 /* Waiting for SIGCHLD is usually more interesting,
3112                  * because it includes return codes/signals. Which is
3113                  * why we ignore the cgroup events for most cases,
3114                  * except when we don't know pid which to expect the
3115                  * SIGCHLD for. */
3116
3117         case SERVICE_START:
3118         case SERVICE_START_POST:
3119                 /* If we were hoping for the daemon to write its PID file,
3120                  * we can give up now. */
3121                 if (s->pid_file_pathspec) {
3122                         log_warning("%s never wrote its PID file. Failing.", UNIT(s)->id);
3123                         service_unwatch_pid_file(s);
3124                         if (s->state == SERVICE_START)
3125                                 service_enter_signal(s, SERVICE_FINAL_SIGTERM, SERVICE_FAILURE_RESOURCES);
3126                         else
3127                                 service_enter_stop(s, SERVICE_FAILURE_RESOURCES);
3128                 }
3129                 break;
3130
3131         case SERVICE_RUNNING:
3132                 /* service_enter_running() will figure out what to do */
3133                 service_enter_running(s, SERVICE_SUCCESS);
3134                 break;
3135
3136         case SERVICE_STOP_SIGTERM:
3137         case SERVICE_STOP_SIGKILL:
3138
3139                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3140                         service_enter_stop_post(s, SERVICE_SUCCESS);
3141
3142                 break;
3143
3144         case SERVICE_FINAL_SIGTERM:
3145         case SERVICE_FINAL_SIGKILL:
3146                 if (main_pid_good(s) <= 0 && !control_pid_good(s))
3147                         service_enter_dead(s, SERVICE_SUCCESS, SERVICE_SUCCESS);
3148
3149                 break;
3150
3151         default:
3152                 ;
3153         }
3154 }
3155
3156 static void service_notify_message(Unit *u, pid_t pid, char **tags) {
3157         Service *s = SERVICE(u);
3158         const char *e;
3159
3160         assert(u);
3161
3162         if (s->notify_access == NOTIFY_NONE) {
3163                 log_warning("%s: Got notification message from PID %lu, but reception is disabled.",
3164                             u->id, (unsigned long) pid);
3165                 return;
3166         }
3167
3168         if (s->notify_access == NOTIFY_MAIN && pid != s->main_pid) {
3169                 log_warning("%s: Got notification message from PID %lu, but reception only permitted for PID %lu",
3170                             u->id, (unsigned long) pid, (unsigned long) s->main_pid);
3171                 return;
3172         }
3173
3174         log_debug("%s: Got message", u->id);
3175
3176         /* Interpret MAINPID= */
3177         if ((e = strv_find_prefix(tags, "MAINPID=")) &&
3178             (s->state == SERVICE_START ||
3179              s->state == SERVICE_START_POST ||
3180              s->state == SERVICE_RUNNING ||
3181              s->state == SERVICE_RELOAD)) {
3182
3183                 if (parse_pid(e + 8, &pid) < 0)
3184                         log_warning("Failed to parse notification message %s", e);
3185                 else {
3186                         log_debug("%s: got %s", u->id, e);
3187                         service_set_main_pid(s, pid);
3188                 }
3189         }
3190
3191         /* Interpret READY= */
3192         if (s->type == SERVICE_NOTIFY &&
3193             s->state == SERVICE_START &&
3194             strv_find(tags, "READY=1")) {
3195                 log_debug("%s: got READY=1", u->id);
3196
3197                 service_enter_start_post(s);
3198         }
3199
3200         /* Interpret STATUS= */
3201         if ((e = strv_find_prefix(tags, "STATUS="))) {
3202                 char *t;
3203
3204                 if (e[7]) {
3205                         if (!(t = strdup(e+7))) {
3206                                 log_error("Failed to allocate string.");
3207                                 return;
3208                         }
3209
3210                         log_debug("%s: got %s", u->id, e);
3211
3212                         free(s->status_text);
3213                         s->status_text = t;
3214                 } else {
3215                         free(s->status_text);
3216                         s->status_text = NULL;
3217                 }
3218
3219         }
3220         if (strv_find(tags, "WATCHDOG=1")) {
3221                 log_debug("%s: got WATCHDOG=1", u->id);
3222                 service_reset_watchdog(s);
3223         }
3224
3225         /* Notify clients about changed status or main pid */
3226         unit_add_to_dbus_queue(u);
3227 }
3228
3229 #ifdef HAVE_SYSV_COMPAT
3230
3231 #ifdef TARGET_SUSE
3232 static void sysv_facility_in_insserv_conf(Manager *mgr) {
3233         FILE *f=NULL;
3234         int r;
3235
3236         if (!(f = fopen("/etc/insserv.conf", "re"))) {
3237                 r = errno == ENOENT ? 0 : -errno;
3238                 goto finish;
3239         }
3240
3241         while (!feof(f)) {
3242                 char l[LINE_MAX], *t;
3243                 char **parsed = NULL;
3244
3245                 if (!fgets(l, sizeof(l), f)) {
3246                         if (feof(f))
3247                                 break;
3248
3249                         r = -errno;
3250                         log_error("Failed to read configuration file '/etc/insserv.conf': %s", strerror(-r));
3251                         goto finish;
3252                 }
3253
3254                 t = strstrip(l);
3255                 if (*t != '$' && *t != '<')
3256                         continue;
3257
3258                 parsed = strv_split(t,WHITESPACE);
3259                 /* we ignore <interactive>, not used, equivalent to X-Interactive */
3260                 if (parsed && !startswith_no_case (parsed[0], "<interactive>")) {
3261                         char *facility;
3262                         Unit *u;
3263                         if (sysv_translate_facility(parsed[0], NULL, &facility) < 0)
3264                                 continue;
3265                         if ((u = manager_get_unit(mgr, facility)) && (u->type == UNIT_TARGET)) {
3266                                 UnitDependency e;
3267                                 char *dep = NULL, *name, **j;
3268
3269                                 STRV_FOREACH (j, parsed+1) {
3270                                         if (*j[0]=='+') {
3271                                                 e = UNIT_WANTS;
3272                                                 name = *j+1;
3273                                         }
3274                                         else {
3275                                                 e = UNIT_REQUIRES;
3276                                                 name = *j;
3277                                         }
3278                                         if (sysv_translate_facility(name, NULL, &dep) < 0)
3279                                                 continue;
3280
3281                                         r = unit_add_two_dependencies_by_name(u, UNIT_BEFORE, e, dep, NULL, true);
3282                                         free(dep);
3283                                 }
3284                         }
3285                         free(facility);
3286                 }
3287                 strv_free(parsed);
3288         }
3289 finish:
3290         if (f)
3291                 fclose(f);
3292
3293 }
3294 #endif
3295
3296 static int service_enumerate(Manager *m) {
3297         char **p;
3298         unsigned i;
3299         DIR *d = NULL;
3300         char *path = NULL, *fpath = NULL, *name = NULL;
3301         Set *runlevel_services[ELEMENTSOF(rcnd_table)], *shutdown_services = NULL;
3302         Unit *service;
3303         Iterator j;
3304         int r;
3305
3306         assert(m);
3307
3308         if (m->running_as != MANAGER_SYSTEM)
3309                 return 0;
3310
3311         zero(runlevel_services);
3312
3313         STRV_FOREACH(p, m->lookup_paths.sysvrcnd_path)
3314                 for (i = 0; i < ELEMENTSOF(rcnd_table); i ++) {
3315                         struct dirent *de;
3316
3317                         free(path);
3318                         path = join(*p, "/", rcnd_table[i].path, NULL);
3319                         if (!path) {
3320                                 r = -ENOMEM;
3321                                 goto finish;
3322                         }
3323
3324                         if (d)
3325                                 closedir(d);
3326
3327                         if (!(d = opendir(path))) {
3328                                 if (errno != ENOENT)
3329                                         log_warning("opendir() failed on %s: %s", path, strerror(errno));
3330
3331                                 continue;
3332                         }
3333
3334                         while ((de = readdir(d))) {
3335                                 int a, b;
3336
3337                                 if (ignore_file(de->d_name))
3338                                         continue;
3339
3340                                 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
3341                                         continue;
3342
3343                                 if (strlen(de->d_name) < 4)
3344                                         continue;
3345
3346                                 a = undecchar(de->d_name[1]);
3347                                 b = undecchar(de->d_name[2]);
3348
3349                                 if (a < 0 || b < 0)
3350                                         continue;
3351
3352                                 free(fpath);
3353                                 fpath = join(path, "/", de->d_name, NULL);
3354                                 if (!fpath) {
3355                                         r = -ENOMEM;
3356                                         goto finish;
3357                                 }
3358
3359                                 if (access(fpath, X_OK) < 0) {
3360
3361                                         if (errno != ENOENT)
3362                                                 log_warning("access() failed on %s: %s", fpath, strerror(errno));
3363
3364                                         continue;
3365                                 }
3366
3367                                 free(name);
3368                                 if (!(name = sysv_translate_name(de->d_name + 3))) {
3369                                         r = -ENOMEM;
3370                                         goto finish;
3371                                 }
3372
3373                                 if ((r = manager_load_unit_prepare(m, name, NULL, NULL, &service)) < 0) {
3374                                         log_warning("Failed to prepare unit %s: %s", name, strerror(-r));
3375                                         continue;
3376                                 }
3377
3378                                 if (de->d_name[0] == 'S')  {
3379
3380                                         if (rcnd_table[i].type == RUNLEVEL_UP || rcnd_table[i].type == RUNLEVEL_SYSINIT) {
3381                                                 SERVICE(service)->sysv_start_priority_from_rcnd =
3382                                                         MAX(a*10 + b, SERVICE(service)->sysv_start_priority_from_rcnd);
3383
3384                                                 SERVICE(service)->sysv_enabled = true;
3385                                         }
3386
3387                                         if ((r = set_ensure_allocated(&runlevel_services[i], trivial_hash_func, trivial_compare_func)) < 0)
3388                                                 goto finish;
3389
3390                                         if ((r = set_put(runlevel_services[i], service)) < 0)
3391                                                 goto finish;
3392
3393                                 } else if (de->d_name[0] == 'K' &&
3394                                            (rcnd_table[i].type == RUNLEVEL_DOWN ||
3395                                             rcnd_table[i].type == RUNLEVEL_SYSINIT)) {
3396
3397                                         if ((r = set_ensure_allocated(&shutdown_services, trivial_hash_func, trivial_compare_func)) < 0)
3398                                                 goto finish;
3399
3400                                         if ((r = set_put(shutdown_services, service)) < 0)
3401                                                 goto finish;
3402                                 }
3403                         }
3404                 }
3405
3406         /* Now we loaded all stubs and are aware of the lowest
3407         start-up priority for all services, not let's actually load
3408         the services, this will also tell us which services are
3409         actually native now */
3410         manager_dispatch_load_queue(m);
3411
3412         /* If this is a native service, rely on native ways to pull in
3413          * a service, don't pull it in via sysv rcN.d links. */
3414         for (i = 0; i < ELEMENTSOF(rcnd_table); i ++)
3415                 SET_FOREACH(service, runlevel_services[i], j) {
3416                         service = unit_follow_merge(service);
3417
3418                         if (service->fragment_path)
3419                                 continue;
3420
3421                         if ((r = unit_add_two_dependencies_by_name_inverse(service, UNIT_AFTER, UNIT_WANTS, rcnd_table[i].target, NULL, true)) < 0)
3422                                 goto finish;
3423                 }
3424
3425         /* We honour K links only for halt/reboot. For the normal
3426          * runlevels we assume the stop jobs will be implicitly added
3427          * by the core logic. Also, we don't really distinguish here
3428          * between the runlevels 0 and 6 and just add them to the
3429          * special shutdown target. On SUSE the boot.d/ runlevel is
3430          * also used for shutdown, so we add links for that too to the
3431          * shutdown target.*/
3432         SET_FOREACH(service, shutdown_services, j) {
3433                 service = unit_follow_merge(service);
3434
3435                 if (service->fragment_path)
3436                         continue;
3437
3438                 if ((r = unit_add_two_dependencies_by_name(service, UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true)) < 0)
3439                         goto finish;
3440         }
3441
3442         r = 0;
3443
3444 #ifdef TARGET_SUSE
3445         sysv_facility_in_insserv_conf (m);
3446 #endif
3447
3448 finish:
3449         free(path);
3450         free(fpath);
3451         free(name);
3452
3453         for (i = 0; i < ELEMENTSOF(rcnd_table); i++)
3454                 set_free(runlevel_services[i]);
3455         set_free(shutdown_services);
3456
3457         if (d)
3458                 closedir(d);
3459
3460         return r;
3461 }
3462 #endif
3463
3464 static void service_bus_name_owner_change(
3465                 Unit *u,
3466                 const char *name,
3467                 const char *old_owner,
3468                 const char *new_owner) {
3469
3470         Service *s = SERVICE(u);
3471
3472         assert(s);
3473         assert(name);
3474
3475         assert(streq(s->bus_name, name));
3476         assert(old_owner || new_owner);
3477
3478         if (old_owner && new_owner)
3479                 log_debug("%s's D-Bus name %s changed owner from %s to %s", u->id, name, old_owner, new_owner);
3480         else if (old_owner)
3481                 log_debug("%s's D-Bus name %s no longer registered by %s", u->id, name, old_owner);
3482         else
3483                 log_debug("%s's D-Bus name %s now registered by %s", u->id, name, new_owner);
3484
3485         s->bus_name_good = !!new_owner;
3486
3487         if (s->type == SERVICE_DBUS) {
3488
3489                 /* service_enter_running() will figure out what to
3490                  * do */
3491                 if (s->state == SERVICE_RUNNING)
3492                         service_enter_running(s, SERVICE_SUCCESS);
3493                 else if (s->state == SERVICE_START && new_owner)
3494                         service_enter_start_post(s);
3495
3496         } else if (new_owner &&
3497                    s->main_pid <= 0 &&
3498                    (s->state == SERVICE_START ||
3499                     s->state == SERVICE_START_POST ||
3500                     s->state == SERVICE_RUNNING ||
3501                     s->state == SERVICE_RELOAD)) {
3502
3503                 /* Try to acquire PID from bus service */
3504                 log_debug("Trying to acquire PID from D-Bus name...");
3505
3506                 bus_query_pid(u->manager, name);
3507         }
3508 }
3509
3510 static void service_bus_query_pid_done(
3511                 Unit *u,
3512                 const char *name,
3513                 pid_t pid) {
3514
3515         Service *s = SERVICE(u);
3516
3517         assert(s);
3518         assert(name);
3519
3520         log_debug("%s's D-Bus name %s is now owned by process %u", u->id, name, (unsigned) pid);
3521
3522         if (s->main_pid <= 0 &&
3523             (s->state == SERVICE_START ||
3524              s->state == SERVICE_START_POST ||
3525              s->state == SERVICE_RUNNING ||
3526              s->state == SERVICE_RELOAD))
3527                 service_set_main_pid(s, pid);
3528 }
3529
3530 int service_set_socket_fd(Service *s, int fd, Socket *sock) {
3531
3532         assert(s);
3533         assert(fd >= 0);
3534
3535         /* This is called by the socket code when instantiating a new
3536          * service for a stream socket and the socket needs to be
3537          * configured. */
3538
3539         if (UNIT(s)->load_state != UNIT_LOADED)
3540                 return -EINVAL;
3541
3542         if (s->socket_fd >= 0)
3543                 return -EBUSY;
3544
3545         if (s->state != SERVICE_DEAD)
3546                 return -EAGAIN;
3547
3548         s->socket_fd = fd;
3549         s->got_socket_fd = true;
3550
3551         unit_ref_set(&s->accept_socket, UNIT(sock));
3552
3553         return unit_add_two_dependencies(UNIT(sock), UNIT_BEFORE, UNIT_TRIGGERS, UNIT(s), false);
3554 }
3555
3556 static void service_reset_failed(Unit *u) {
3557         Service *s = SERVICE(u);
3558
3559         assert(s);
3560
3561         if (s->state == SERVICE_FAILED)
3562                 service_set_state(s, SERVICE_DEAD);
3563
3564         s->result = SERVICE_SUCCESS;
3565         s->reload_result = SERVICE_SUCCESS;
3566 }
3567
3568 static bool service_need_daemon_reload(Unit *u) {
3569         Service *s = SERVICE(u);
3570
3571         assert(s);
3572
3573 #ifdef HAVE_SYSV_COMPAT
3574         if (s->sysv_path) {
3575                 struct stat st;
3576
3577                 zero(st);
3578                 if (stat(s->sysv_path, &st) < 0)
3579                         /* What, cannot access this anymore? */
3580                         return true;
3581
3582                 if (s->sysv_mtime > 0 &&
3583                     timespec_load(&st.st_mtim) != s->sysv_mtime)
3584                         return true;
3585         }
3586 #endif
3587
3588         return false;
3589 }
3590
3591 static int service_kill(Unit *u, KillWho who, KillMode mode, int signo, DBusError *error) {
3592         Service *s = SERVICE(u);
3593         int r = 0;
3594         Set *pid_set = NULL;
3595
3596         assert(s);
3597
3598         if (s->main_pid <= 0 && who == KILL_MAIN) {
3599                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No main process to kill");
3600                 return -ESRCH;
3601         }
3602
3603         if (s->control_pid <= 0 && who == KILL_CONTROL) {
3604                 dbus_set_error(error, BUS_ERROR_NO_SUCH_PROCESS, "No control process to kill");
3605                 return -ESRCH;
3606         }
3607
3608         if (who == KILL_CONTROL || who == KILL_ALL)
3609                 if (s->control_pid > 0)
3610                         if (kill(s->control_pid, signo) < 0)
3611                                 r = -errno;
3612
3613         if (who == KILL_MAIN || who == KILL_ALL)
3614                 if (s->main_pid > 0)
3615                         if (kill(s->main_pid, signo) < 0)
3616                                 r = -errno;
3617
3618         if (who == KILL_ALL && mode == KILL_CONTROL_GROUP) {
3619                 int q;
3620
3621                 if (!(pid_set = set_new(trivial_hash_func, trivial_compare_func)))
3622                         return -ENOMEM;
3623
3624                 /* Exclude the control/main pid from being killed via the cgroup */
3625                 if (s->control_pid > 0)
3626                         if ((q = set_put(pid_set, LONG_TO_PTR(s->control_pid))) < 0) {
3627                                 r = q;
3628                                 goto finish;
3629                         }
3630
3631                 if (s->main_pid > 0)
3632                         if ((q = set_put(pid_set, LONG_TO_PTR(s->main_pid))) < 0) {
3633                                 r = q;
3634                                 goto finish;
3635                         }
3636
3637                 if ((q = cgroup_bonding_kill_list(UNIT(s)->cgroup_bondings, signo, false, pid_set)) < 0)
3638                         if (q != -EAGAIN && q != -ESRCH && q != -ENOENT)
3639                                 r = q;
3640         }
3641
3642 finish:
3643         if (pid_set)
3644                 set_free(pid_set);
3645
3646         return r;
3647 }
3648
3649 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
3650         [SERVICE_DEAD] = "dead",
3651         [SERVICE_START_PRE] = "start-pre",
3652         [SERVICE_START] = "start",
3653         [SERVICE_START_POST] = "start-post",
3654         [SERVICE_RUNNING] = "running",
3655         [SERVICE_EXITED] = "exited",
3656         [SERVICE_RELOAD] = "reload",
3657         [SERVICE_STOP] = "stop",
3658         [SERVICE_STOP_SIGTERM] = "stop-sigterm",
3659         [SERVICE_STOP_SIGKILL] = "stop-sigkill",
3660         [SERVICE_STOP_POST] = "stop-post",
3661         [SERVICE_FINAL_SIGTERM] = "final-sigterm",
3662         [SERVICE_FINAL_SIGKILL] = "final-sigkill",
3663         [SERVICE_FAILED] = "failed",
3664         [SERVICE_AUTO_RESTART] = "auto-restart",
3665 };
3666
3667 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
3668
3669 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
3670         [SERVICE_RESTART_NO] = "no",
3671         [SERVICE_RESTART_ON_SUCCESS] = "on-success",
3672         [SERVICE_RESTART_ON_FAILURE] = "on-failure",
3673         [SERVICE_RESTART_ON_ABORT] = "on-abort",
3674         [SERVICE_RESTART_ALWAYS] = "always"
3675 };
3676
3677 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
3678
3679 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
3680         [SERVICE_SIMPLE] = "simple",
3681         [SERVICE_FORKING] = "forking",
3682         [SERVICE_ONESHOT] = "oneshot",
3683         [SERVICE_DBUS] = "dbus",
3684         [SERVICE_NOTIFY] = "notify"
3685 };
3686
3687 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
3688
3689 static const char* const service_exec_command_table[_SERVICE_EXEC_COMMAND_MAX] = {
3690         [SERVICE_EXEC_START_PRE] = "ExecStartPre",
3691         [SERVICE_EXEC_START] = "ExecStart",
3692         [SERVICE_EXEC_START_POST] = "ExecStartPost",
3693         [SERVICE_EXEC_RELOAD] = "ExecReload",
3694         [SERVICE_EXEC_STOP] = "ExecStop",
3695         [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
3696 };
3697
3698 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
3699
3700 static const char* const notify_access_table[_NOTIFY_ACCESS_MAX] = {
3701         [NOTIFY_NONE] = "none",
3702         [NOTIFY_MAIN] = "main",
3703         [NOTIFY_ALL] = "all"
3704 };
3705
3706 DEFINE_STRING_TABLE_LOOKUP(notify_access, NotifyAccess);
3707
3708 static const char* const service_result_table[_SERVICE_RESULT_MAX] = {
3709         [SERVICE_SUCCESS] = "success",
3710         [SERVICE_FAILURE_RESOURCES] = "resources",
3711         [SERVICE_FAILURE_TIMEOUT] = "timeout",
3712         [SERVICE_FAILURE_EXIT_CODE] = "exit-code",
3713         [SERVICE_FAILURE_SIGNAL] = "signal",
3714         [SERVICE_FAILURE_CORE_DUMP] = "core-dump",
3715         [SERVICE_FAILURE_WATCHDOG] = "watchdog"
3716 };
3717
3718 DEFINE_STRING_TABLE_LOOKUP(service_result, ServiceResult);
3719
3720 static const char* const start_limit_action_table[_SERVICE_START_LIMIT_MAX] = {
3721         [SERVICE_START_LIMIT_NONE] = "none",
3722         [SERVICE_START_LIMIT_REBOOT] = "reboot",
3723         [SERVICE_START_LIMIT_REBOOT_FORCE] = "reboot-force",
3724         [SERVICE_START_LIMIT_REBOOT_IMMEDIATE] = "reboot-immediate"
3725 };
3726 DEFINE_STRING_TABLE_LOOKUP(start_limit_action, StartLimitAction);
3727
3728 const UnitVTable service_vtable = {
3729         .suffix = ".service",
3730         .object_size = sizeof(Service),
3731         .sections =
3732                 "Unit\0"
3733                 "Service\0"
3734                 "Install\0",
3735         .show_status = true,
3736
3737         .init = service_init,
3738         .done = service_done,
3739         .load = service_load,
3740
3741         .coldplug = service_coldplug,
3742
3743         .dump = service_dump,
3744
3745         .start = service_start,
3746         .stop = service_stop,
3747         .reload = service_reload,
3748
3749         .can_reload = service_can_reload,
3750
3751         .kill = service_kill,
3752
3753         .serialize = service_serialize,
3754         .deserialize_item = service_deserialize_item,
3755
3756         .active_state = service_active_state,
3757         .sub_state_to_string = service_sub_state_to_string,
3758
3759         .check_gc = service_check_gc,
3760         .check_snapshot = service_check_snapshot,
3761
3762         .sigchld_event = service_sigchld_event,
3763         .timer_event = service_timer_event,
3764         .fd_event = service_fd_event,
3765
3766         .reset_failed = service_reset_failed,
3767
3768         .need_daemon_reload = service_need_daemon_reload,
3769
3770         .cgroup_notify_empty = service_cgroup_notify_event,
3771         .notify_message = service_notify_message,
3772
3773         .bus_name_owner_change = service_bus_name_owner_change,
3774         .bus_query_pid_done = service_bus_query_pid_done,
3775
3776         .bus_interface = "org.freedesktop.systemd1.Service",
3777         .bus_message_handler = bus_service_message_handler,
3778         .bus_invalidating_properties =  bus_service_invalidating_properties,
3779
3780 #ifdef HAVE_SYSV_COMPAT
3781         .enumerate = service_enumerate
3782 #endif
3783 };