1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
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.
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.
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/>.
29 #include "load-fragment.h"
30 #include "load-dropin.h"
34 #define COMMENTS "#;\n"
35 #define NEWLINES "\n\r"
38 static const char * const rcnd_table[] = {
39 "../rc0.d", SPECIAL_RUNLEVEL0_TARGET,
40 "../rc1.d", SPECIAL_RUNLEVEL1_TARGET,
41 "../rc2.d", SPECIAL_RUNLEVEL2_TARGET,
42 "../rc3.d", SPECIAL_RUNLEVEL3_TARGET,
43 "../rc4.d", SPECIAL_RUNLEVEL4_TARGET,
44 "../rc5.d", SPECIAL_RUNLEVEL5_TARGET,
45 "../rc6.d", SPECIAL_RUNLEVEL6_TARGET
49 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
50 [SERVICE_DEAD] = UNIT_INACTIVE,
51 [SERVICE_START_PRE] = UNIT_ACTIVATING,
52 [SERVICE_START] = UNIT_ACTIVATING,
53 [SERVICE_START_POST] = UNIT_ACTIVATING,
54 [SERVICE_RUNNING] = UNIT_ACTIVE,
55 [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
56 [SERVICE_STOP] = UNIT_DEACTIVATING,
57 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
58 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
59 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
60 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
61 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
62 [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
63 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
66 static void service_done(Unit *u) {
67 Service *s = SERVICE(u);
77 exec_context_done(&s->exec_context);
78 exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
79 s->control_command = NULL;
81 /* This will leak a process, but at least no memory or any of
83 if (s->main_pid > 0) {
84 unit_unwatch_pid(u, s->main_pid);
88 if (s->control_pid > 0) {
89 unit_unwatch_pid(u, s->control_pid);
93 unit_unwatch_timer(u, &s->timer_watch);
96 static int sysv_translate_name(const char *name, char **_r) {
98 static const char * const table[] = {
99 "$local_fs", SPECIAL_LOCAL_FS_TARGET,
100 "$network", SPECIAL_NETWORK_TARGET,
101 "$named", SPECIAL_NSS_LOOKUP_TARGET,
102 "$portmap", SPECIAL_RPCBIND_TARGET,
103 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
104 "$syslog", SPECIAL_SYSLOG_TARGET,
105 "$time", SPECIAL_RTC_SET_TARGET
111 for (i = 0; i < ELEMENTSOF(table); i += 2)
112 if (streq(table[i], name)) {
113 if (!(r = strdup(table[i+1])))
122 if (asprintf(&r, "%s.service", name) < 0)
133 static int sysv_chkconfig_order(Service *s) {
139 if (s->sysv_start_priority < 0)
142 /* For each pair of services where at least one lacks a LSB
143 * header, we use the start priority value to order things. */
145 LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
149 t = (Service*) other;
154 if (t->sysv_start_priority < 0)
157 if (s->sysv_has_lsb && t->sysv_has_lsb)
160 if (t->sysv_start_priority < s->sysv_start_priority)
162 else if (t->sysv_start_priority > s->sysv_start_priority)
167 /* FIXME: Maybe we should compare the name here lexicographically? */
169 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
176 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
179 if (!(c = new0(ExecCommand, 1)))
182 if (!(c->path = strdup(path))) {
187 if (!(c->argv = strv_new(path, arg1, NULL))) {
196 static int sysv_exec_commands(Service *s) {
200 assert(s->sysv_path);
202 if (!(c = exec_command_new(s->sysv_path, "start")))
204 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
206 if (!(c = exec_command_new(s->sysv_path, "stop")))
208 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
210 if (!(c = exec_command_new(s->sysv_path, "reload")))
212 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
217 static int priority_from_rcd(Service *s, const char *init_script) {
221 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path)
222 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
227 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
235 log_warning("opendir() failed on %s: %s", path, strerror(errno));
240 while ((de = readdir(d))) {
243 if (ignore_file(de->d_name))
246 if (de->d_name[0] != 'S')
249 if (strlen(de->d_name) < 4)
252 if (!streq(de->d_name + 3, init_script))
255 /* Yay, we found it! Now decode the priority */
257 a = undecchar(de->d_name[1]);
258 b = undecchar(de->d_name[2]);
263 s->sysv_start_priority = a*10 + b;
265 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
277 static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) {
295 if (!(f = fopen(path, "re"))) {
296 r = errno == ENOENT ? 0 : -errno;
300 s->type = SERVICE_FORKING;
301 s->restart = SERVICE_ONCE;
304 if (!(s->sysv_path = strdup(path))) {
310 char l[LINE_MAX], *t;
312 if (!fgets(l, sizeof(l), f)) {
317 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
327 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
329 s->sysv_has_lsb = true;
333 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
339 t += strspn(t, WHITESPACE);
341 if (state == NORMAL) {
343 /* Try to parse Red Hat style chkconfig headers */
345 if (startswith(t, "chkconfig:")) {
350 if (sscanf(t+10, "%*15s %i %*i",
351 &start_priority) != 1) {
353 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
357 if (start_priority < 0 || start_priority > 99) {
358 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
362 s->sysv_start_priority = start_priority;
364 } else if (startswith(t, "description:")) {
366 size_t k = strlen(t);
369 if (t[k-1] == '\\') {
374 if (!(d = strdup(strstrip(t+12)))) {
379 free(u->meta.description);
380 u->meta.description = d;
382 } else if (startswith(t, "pidfile:")) {
389 if (!path_is_absolute(fn)) {
390 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
394 if (!(fn = strdup(fn))) {
403 } else if (state == DESCRIPTION) {
405 /* Try to parse Red Hat style description
408 size_t k = strlen(t);
416 assert(u->meta.description);
417 if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
422 free(u->meta.description);
423 u->meta.description = d;
425 } else if (state == LSB || state == LSB_DESCRIPTION) {
427 if (startswith(t, "Provides:")) {
433 FOREACH_WORD(w, z, t+9, i) {
436 if (!(n = strndup(w, z))) {
441 r = sysv_translate_name(n, &m);
450 if (unit_name_to_type(m) == UNIT_SERVICE)
451 r = unit_add_name(u, m);
453 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
454 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
463 } else if (startswith(t, "Required-Start:") ||
464 startswith(t, "Should-Start:")) {
470 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
473 if (!(n = strndup(w, z))) {
478 r = sysv_translate_name(n, &m);
487 if (!(r = unit_add_dependency_by_name(u, UNIT_AFTER, m)) < 0) {
492 r = unit_add_dependency_by_name(
494 startswith(t, "Required-Start:") ? UNIT_REQUIRES : UNIT_WANTS,
502 } else if (startswith(t, "Description:")) {
505 state = LSB_DESCRIPTION;
507 if (!(d = strdup(strstrip(t+12)))) {
512 free(u->meta.description);
513 u->meta.description = d;
515 } else if (startswith(t, "Short-Description:") && !u->meta.description) {
518 /* We use the short description only
519 * if no long description is set. */
523 if (!(d = strdup(strstrip(t+18)))) {
528 free(u->meta.description);
529 u->meta.description = d;
531 } else if (state == LSB_DESCRIPTION) {
533 if (startswith(l, "#\t") || startswith(l, "# ")) {
536 assert(u->meta.description);
537 if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
542 free(u->meta.description);
543 u->meta.description = d;
550 /* If init scripts have no LSB header, then we enforce the
551 * ordering via the chkconfig priorities. We try to determine
552 * a priority for *all* init scripts here, since they are
553 * needed as soon as at least one non-LSB script is used. */
555 if (s->sysv_start_priority < 0) {
556 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
558 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
561 if (s->sysv_start_priority < 0)
562 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
565 if ((r = sysv_exec_commands(s)) < 0)
568 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_SYSINIT_SERVICE)) < 0 ||
569 (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_SYSINIT_SERVICE)) < 0)
572 *new_state = UNIT_LOADED;
583 static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) {
589 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
593 if (asprintf(&path, "%s/%s", *p, name) < 0)
596 assert(endswith(path, ".service"));
597 path[strlen(path)-8] = 0;
599 r = service_load_sysv_path(s, path, new_state);
605 if (*new_state != UNIT_STUB)
612 static int service_load_sysv(Service *s, UnitLoadState *new_state) {
620 /* Load service data from SysV init scripts, preferably with
623 if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
626 if ((t = unit_id(UNIT(s))))
627 if ((r = service_load_sysv_name(s, t, new_state)) < 0)
630 if (*new_state == UNIT_STUB)
631 SET_FOREACH(t, UNIT(s)->meta.names, i) {
632 if ((r == service_load_sysv_name(s, t, new_state)) < 0)
635 if (*new_state != UNIT_STUB)
642 static int service_init(Unit *u, UnitLoadState *new_state) {
644 Service *s = SERVICE(u);
648 assert(*new_state == UNIT_STUB);
650 /* First, reset everything to the defaults, in case this is a
656 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
657 s->restart_usec = DEFAULT_RESTART_USEC;
659 exec_context_init(&s->exec_context);
661 s->timer_watch.type = WATCH_INVALID;
663 s->state = SERVICE_DEAD;
665 s->sysv_start_priority = -1;
666 s->permissions_start_only = false;
667 s->root_directory_start_only = false;
669 s->sysv_has_lsb = false;
671 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
673 /* Load a .service file */
674 if ((r = unit_load_fragment(u, new_state)) < 0)
677 /* Load a classic init script as a fallback, if we couldn't find anything */
678 if (*new_state == UNIT_STUB)
679 if ((r = service_load_sysv(s, new_state)) < 0)
682 /* Still nothing found? Then let's give up */
683 if (*new_state == UNIT_STUB)
686 /* We were able to load something, then let's add in the
687 * dropin directories. */
688 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
691 /* This is a new unit? Then let's add in some extras */
692 if (*new_state == UNIT_LOADED) {
693 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
696 if ((r = unit_add_default_cgroup(u)) < 0)
699 if ((r = sysv_chkconfig_order(s)) < 0)
706 static void service_dump(Unit *u, FILE *f, const char *prefix) {
708 ServiceExecCommand c;
709 Service *s = SERVICE(u);
715 p2 = strappend(prefix, "\t");
716 prefix2 = p2 ? p2 : prefix;
719 "%sService State: %s\n"
720 "%sPermissionsStartOnly: %s\n"
721 "%sRootDirectoryStartOnly: %s\n"
722 "%sValidNoProcess: %s\n"
724 prefix, service_state_to_string(s->state),
725 prefix, yes_no(s->permissions_start_only),
726 prefix, yes_no(s->root_directory_start_only),
727 prefix, yes_no(s->valid_no_process),
728 prefix, service_type_to_string(s->type));
733 prefix, s->pid_file);
736 exec_context_dump(&s->exec_context, f, prefix);
738 for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
740 if (!s->exec_command[c])
743 fprintf(f, "%s→ %s:\n",
744 prefix, service_exec_command_to_string(c));
746 exec_command_dump_list(s->exec_command[c], f, prefix2);
751 "%sSysV Init Script Path: %s\n"
752 "%sSysV Init Script has LSB Header: %s\n",
753 prefix, s->sysv_path,
754 prefix, yes_no(s->sysv_has_lsb));
756 if (s->sysv_start_priority >= 0)
758 "%sSysVStartPriority: %i\n",
759 prefix, s->sysv_start_priority);
765 static int service_load_pid_file(Service *s) {
772 if (s->main_pid_known)
778 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
781 if ((r = safe_atolu(k, &p)) < 0) {
786 if ((unsigned long) (pid_t) p != p)
790 s->main_pid_known = true;
795 static int service_get_sockets(Service *s, Set **_set) {
804 /* Collects all Socket objects that belong to this
805 * service. Note that a service might have multiple sockets
806 * via multiple names. */
808 if (!(set = set_new(NULL, NULL)))
811 SET_FOREACH(t, UNIT(s)->meta.names, i) {
815 /* Look for all socket objects that go by any of our
816 * units and collect their fds */
818 if (!(k = unit_name_change_suffix(t, ".socket"))) {
823 p = manager_get_unit(UNIT(s)->meta.manager, k);
828 if ((r = set_put(set, p)) < 0)
841 static int service_notify_sockets(Service *s) {
849 /* Notifies all our sockets when we die */
851 if ((r = service_get_sockets(s, &set)) < 0)
854 SET_FOREACH(sock, set, i)
855 socket_notify_service_dead(sock);
862 static void service_set_state(Service *s, ServiceState state) {
863 ServiceState old_state;
866 old_state = s->state;
869 if (state != SERVICE_START_PRE &&
870 state != SERVICE_START &&
871 state != SERVICE_START_POST &&
872 state != SERVICE_RELOAD &&
873 state != SERVICE_STOP &&
874 state != SERVICE_STOP_SIGTERM &&
875 state != SERVICE_STOP_SIGKILL &&
876 state != SERVICE_STOP_POST &&
877 state != SERVICE_FINAL_SIGTERM &&
878 state != SERVICE_FINAL_SIGKILL &&
879 state != SERVICE_AUTO_RESTART)
880 unit_unwatch_timer(UNIT(s), &s->timer_watch);
882 if (state != SERVICE_START &&
883 state != SERVICE_START_POST &&
884 state != SERVICE_RUNNING &&
885 state != SERVICE_RELOAD &&
886 state != SERVICE_STOP &&
887 state != SERVICE_STOP_SIGTERM &&
888 state != SERVICE_STOP_SIGKILL)
889 if (s->main_pid > 0) {
890 unit_unwatch_pid(UNIT(s), s->main_pid);
894 if (state != SERVICE_START_PRE &&
895 state != SERVICE_START &&
896 state != SERVICE_START_POST &&
897 state != SERVICE_RELOAD &&
898 state != SERVICE_STOP &&
899 state != SERVICE_STOP_SIGTERM &&
900 state != SERVICE_STOP_SIGKILL &&
901 state != SERVICE_STOP_POST &&
902 state != SERVICE_FINAL_SIGTERM &&
903 state != SERVICE_FINAL_SIGKILL)
904 if (s->control_pid > 0) {
905 unit_unwatch_pid(UNIT(s), s->control_pid);
909 if (state != SERVICE_START_PRE &&
910 state != SERVICE_START &&
911 state != SERVICE_START_POST &&
912 state != SERVICE_RELOAD &&
913 state != SERVICE_STOP &&
914 state != SERVICE_STOP_POST)
915 s->control_command = NULL;
917 if (state == SERVICE_DEAD ||
918 state == SERVICE_STOP ||
919 state == SERVICE_STOP_SIGTERM ||
920 state == SERVICE_STOP_SIGKILL ||
921 state == SERVICE_STOP_POST ||
922 state == SERVICE_FINAL_SIGTERM ||
923 state == SERVICE_FINAL_SIGKILL ||
924 state == SERVICE_MAINTAINANCE ||
925 state == SERVICE_AUTO_RESTART)
926 service_notify_sockets(s);
928 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
930 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
933 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
945 if ((r = service_get_sockets(s, &set)) < 0)
948 SET_FOREACH(sock, set, i) {
952 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
964 if (!(t = new(int, rn_fds+cn_fds))) {
970 memcpy(t, rfds, rn_fds);
971 memcpy(t+rn_fds, cfds, cn_fds);
976 rn_fds = rn_fds+cn_fds;
994 static int service_spawn(
999 bool apply_permissions,
1013 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1017 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1020 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1022 if ((r = exec_spawn(c,
1027 UNIT(s)->meta.cgroup_bondings,
1031 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1032 /* FIXME: we need to do something here */
1044 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1049 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1056 if (allow_restart &&
1057 (s->restart == SERVICE_RESTART_ALWAYS ||
1058 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1060 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1063 service_set_state(s, SERVICE_AUTO_RESTART);
1065 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1070 log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1071 service_enter_dead(s, false, false);
1074 static void service_enter_signal(Service *s, ServiceState state, bool success);
1076 static void service_enter_stop_post(Service *s, bool success) {
1083 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1084 if ((r = service_spawn(s,
1088 !s->permissions_start_only,
1089 !s->root_directory_start_only,
1090 &s->control_pid)) < 0)
1094 service_set_state(s, SERVICE_STOP_POST);
1096 if (!s->control_command)
1097 service_enter_dead(s, true, true);
1102 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1103 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1106 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1115 if (s->main_pid > 0 || s->control_pid > 0) {
1118 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1121 if (s->main_pid > 0) {
1122 if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
1128 if (s->control_pid > 0) {
1129 if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
1139 service_set_state(s, state);
1141 if (s->main_pid <= 0 && s->control_pid <= 0)
1142 service_enter_dead(s, true, true);
1147 log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1151 service_set_state(s, state);
1152 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1153 service_enter_stop_post(s, false);
1155 service_enter_dead(s, false, true);
1158 static void service_enter_stop(Service *s, bool success) {
1165 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1166 if ((r = service_spawn(s,
1170 !s->permissions_start_only,
1171 !s->root_directory_start_only,
1172 &s->control_pid)) < 0)
1175 service_set_state(s, SERVICE_STOP);
1177 if (!s->control_command)
1178 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1183 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1184 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1187 static void service_enter_start_post(Service *s) {
1191 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1192 if ((r = service_spawn(s,
1196 !s->permissions_start_only,
1197 !s->root_directory_start_only,
1198 &s->control_pid)) < 0)
1202 service_set_state(s, SERVICE_START_POST);
1204 if (!s->control_command)
1205 service_set_state(s, SERVICE_RUNNING);
1210 log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1211 service_enter_stop(s, false);
1214 static void service_enter_start(Service *s) {
1220 assert(s->exec_command[SERVICE_EXEC_START]);
1221 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1223 if ((r = service_spawn(s,
1224 s->exec_command[SERVICE_EXEC_START],
1225 s->type == SERVICE_FORKING,
1232 service_set_state(s, SERVICE_START);
1234 if (s->type == SERVICE_SIMPLE) {
1235 /* For simple services we immediately start
1236 * the START_POST binaries. */
1239 s->main_pid_known = true;
1240 service_enter_start_post(s);
1242 } else if (s->type == SERVICE_FORKING) {
1244 /* For forking services we wait until the start
1245 * process exited. */
1247 s->control_pid = pid;
1248 s->control_command = s->exec_command[SERVICE_EXEC_START];
1249 } else if (s->type == SERVICE_FINISH) {
1251 /* For finishing services we wait until the start
1252 * process exited, too, but it is our main process. */
1255 s->control_command = s->exec_command[SERVICE_EXEC_START];
1257 assert_not_reached("Unknown service type");
1262 log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1263 service_enter_stop(s, false);
1266 static void service_enter_start_pre(Service *s) {
1271 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1272 if ((r = service_spawn(s,
1276 !s->permissions_start_only,
1277 !s->root_directory_start_only,
1278 &s->control_pid)) < 0)
1281 service_set_state(s, SERVICE_START_PRE);
1283 if (!s->control_command)
1284 service_enter_start(s);
1289 log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1290 service_enter_dead(s, false, true);
1293 static void service_enter_restart(Service *s) {
1297 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1300 log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1301 service_enter_dead(s, true, false);
1306 log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1307 service_enter_dead(s, false, false);
1310 static void service_enter_reload(Service *s) {
1315 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1316 if ((r = service_spawn(s,
1320 !s->permissions_start_only,
1321 !s->root_directory_start_only,
1322 &s->control_pid)) < 0)
1325 service_set_state(s, SERVICE_RELOAD);
1327 if (!s->control_command)
1328 service_set_state(s, SERVICE_RUNNING);
1333 log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1334 service_enter_stop(s, false);
1337 static void service_run_next(Service *s, bool success) {
1341 assert(s->control_command);
1342 assert(s->control_command->command_next);
1347 s->control_command = s->control_command->command_next;
1349 if ((r = service_spawn(s,
1353 !s->permissions_start_only,
1354 !s->root_directory_start_only,
1355 &s->control_pid)) < 0)
1361 log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1363 if (s->state == SERVICE_STOP)
1364 service_enter_stop_post(s, false);
1365 else if (s->state == SERVICE_STOP_POST)
1366 service_enter_dead(s, false, true);
1368 service_enter_stop(s, false);
1371 static int service_start(Unit *u) {
1372 Service *s = SERVICE(u);
1376 /* We cannot fulfill this request right now, try again later
1378 if (s->state == SERVICE_STOP ||
1379 s->state == SERVICE_STOP_SIGTERM ||
1380 s->state == SERVICE_STOP_SIGKILL ||
1381 s->state == SERVICE_STOP_POST ||
1382 s->state == SERVICE_FINAL_SIGTERM ||
1383 s->state == SERVICE_FINAL_SIGKILL)
1386 /* Already on it! */
1387 if (s->state == SERVICE_START_PRE ||
1388 s->state == SERVICE_START ||
1389 s->state == SERVICE_START_POST)
1392 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1394 /* Make sure we don't enter a busy loop of some kind. */
1395 if (!ratelimit_test(&s->ratelimit)) {
1396 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1401 s->main_pid_known = false;
1403 service_enter_start_pre(s);
1407 static int service_stop(Unit *u) {
1408 Service *s = SERVICE(u);
1412 if (s->state == SERVICE_START_PRE ||
1413 s->state == SERVICE_START ||
1414 s->state == SERVICE_START_POST ||
1415 s->state == SERVICE_RELOAD)
1418 if (s->state == SERVICE_AUTO_RESTART) {
1419 service_set_state(s, SERVICE_DEAD);
1423 assert(s->state == SERVICE_RUNNING);
1425 service_enter_stop(s, true);
1429 static int service_reload(Unit *u) {
1430 Service *s = SERVICE(u);
1434 assert(s->state == SERVICE_RUNNING);
1436 service_enter_reload(s);
1440 static bool service_can_reload(Unit *u) {
1441 Service *s = SERVICE(u);
1445 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1448 static UnitActiveState service_active_state(Unit *u) {
1451 return state_translation_table[SERVICE(u)->state];
1454 static int main_pid_good(Service *s) {
1457 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1460 /* If we know the pid file, then lets just check if it is
1462 if (s->main_pid_known)
1463 return s->main_pid > 0;
1465 /* We don't know the pid */
1469 static bool control_pid_good(Service *s) {
1472 return s->control_pid > 0;
1475 static int cgroup_good(Service *s) {
1478 if (s->valid_no_process)
1481 return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1484 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1485 Service *s = SERVICE(u);
1491 success = code == CLD_EXITED && status == 0;
1492 s->failure = s->failure || !success;
1494 if (s->main_pid == pid) {
1496 exec_status_fill(&s->main_exec_status, pid, code, status);
1499 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1500 assert(s->exec_command[SERVICE_EXEC_START]);
1501 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1504 log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1506 /* The service exited, so the service is officially
1511 case SERVICE_START_POST:
1512 case SERVICE_RELOAD:
1514 /* Need to wait until the operation is
1519 assert(s->type == SERVICE_FINISH);
1521 /* This was our main goal, so let's go on */
1523 service_enter_start_post(s);
1525 service_enter_stop(s, false);
1528 case SERVICE_RUNNING:
1529 service_enter_stop(s, success);
1532 case SERVICE_STOP_SIGTERM:
1533 case SERVICE_STOP_SIGKILL:
1535 if (!control_pid_good(s))
1536 service_enter_stop_post(s, success);
1538 /* If there is still a control process, wait for that first */
1542 assert_not_reached("Uh, main process died at wrong time.");
1545 } else if (s->control_pid == pid) {
1546 assert(s->control_command);
1548 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1551 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1553 /* If we are shutting things down anyway we
1554 * don't care about failing commands. */
1556 if (s->control_command->command_next &&
1557 (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1559 /* There is another command to *
1560 * execute, so let's do that. */
1562 service_run_next(s, success);
1565 /* No further commands for this step, so let's
1566 * figure out what to do next */
1568 log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1572 case SERVICE_START_PRE:
1574 service_enter_start(s);
1576 service_enter_stop(s, false);
1580 assert(s->type == SERVICE_FORKING);
1582 /* Let's try to load the pid
1583 * file here if we can. We
1584 * ignore the return value,
1585 * since the PID file might
1586 * actually be created by a
1587 * START_POST script */
1591 service_load_pid_file(s);
1593 service_enter_start_post(s);
1595 service_enter_stop(s, false);
1599 case SERVICE_START_POST:
1600 if (success && s->pid_file && !s->main_pid_known) {
1603 /* Hmm, let's see if we can
1604 * load the pid now after the
1605 * start-post scripts got
1608 if ((r = service_load_pid_file(s)) < 0)
1609 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1614 case SERVICE_RELOAD:
1616 if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1617 service_set_state(s, SERVICE_RUNNING);
1619 service_enter_stop(s, true);
1621 service_enter_stop(s, false);
1626 if (main_pid_good(s) > 0)
1627 /* Still not dead and we know the PID? Let's go hunting. */
1628 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1630 service_enter_stop_post(s, success);
1633 case SERVICE_STOP_SIGTERM:
1634 case SERVICE_STOP_SIGKILL:
1635 if (main_pid_good(s) <= 0)
1636 service_enter_stop_post(s, success);
1638 /* If there is still a service
1639 * process around, wait until
1640 * that one quit, too */
1643 case SERVICE_STOP_POST:
1644 case SERVICE_FINAL_SIGTERM:
1645 case SERVICE_FINAL_SIGKILL:
1646 service_enter_dead(s, success, true);
1650 assert_not_reached("Uh, control process died at wrong time.");
1654 assert_not_reached("Got SIGCHLD for unkown PID");
1657 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1658 Service *s = SERVICE(u);
1661 assert(elapsed == 1);
1663 assert(w == &s->timer_watch);
1667 case SERVICE_START_PRE:
1669 case SERVICE_START_POST:
1670 case SERVICE_RELOAD:
1671 log_warning("%s operation timed out. Stopping.", unit_id(u));
1672 service_enter_stop(s, false);
1676 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1677 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1680 case SERVICE_STOP_SIGTERM:
1681 log_warning("%s stopping timed out. Killing.", unit_id(u));
1682 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1685 case SERVICE_STOP_SIGKILL:
1686 /* Uh, wie sent a SIGKILL and it is still not gone?
1687 * Must be something we cannot kill, so let's just be
1688 * weirded out and continue */
1690 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1691 service_enter_stop_post(s, false);
1694 case SERVICE_STOP_POST:
1695 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1696 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1699 case SERVICE_FINAL_SIGTERM:
1700 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1701 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1704 case SERVICE_FINAL_SIGKILL:
1705 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1706 service_enter_dead(s, false, true);
1709 case SERVICE_AUTO_RESTART:
1710 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1711 service_enter_restart(s);
1715 assert_not_reached("Timeout at wrong time.");
1719 static void service_cgroup_notify_event(Unit *u) {
1720 Service *s = SERVICE(u);
1724 log_debug("%s: cgroup is empty", unit_id(u));
1728 /* Waiting for SIGCHLD is usually more interesting,
1729 * because it includes return codes/signals. Which is
1730 * why we ignore the cgroup events for most cases,
1731 * except when we don't know pid which to expect the
1734 case SERVICE_RUNNING:
1736 if (!s->valid_no_process && main_pid_good(s) <= 0)
1737 service_enter_stop(s, true);
1746 static int service_enumerate(Manager *m) {
1750 char *path = NULL, *fpath = NULL, *name = NULL;
1755 STRV_FOREACH(p, m->sysvinit_path)
1756 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1761 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1769 if (!(d = opendir(path))) {
1770 if (errno != ENOENT)
1771 log_warning("opendir() failed on %s: %s", path, strerror(errno));
1776 while ((de = readdir(d))) {
1777 Unit *runlevel, *service;
1779 if (ignore_file(de->d_name))
1782 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1785 if (strlen(de->d_name) < 4)
1790 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1795 if (access(fpath, X_OK) < 0) {
1797 if (errno != ENOENT)
1798 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1805 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1810 if ((r = manager_load_unit(m, name, &service)) < 0)
1813 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1816 if (de->d_name[0] == 'S') {
1817 if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1820 if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1823 } else if (de->d_name[0] == 'K' &&
1824 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1825 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1827 /* We honour K links only for
1828 * halt/reboot. For the normal
1829 * runlevels we assume the
1831 * implicitly added by the
1834 if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1837 if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1854 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1855 [SERVICE_DEAD] = "dead",
1856 [SERVICE_START_PRE] = "start-pre",
1857 [SERVICE_START] = "start",
1858 [SERVICE_START_POST] = "start-post",
1859 [SERVICE_RUNNING] = "running",
1860 [SERVICE_RELOAD] = "reload",
1861 [SERVICE_STOP] = "stop",
1862 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1863 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1864 [SERVICE_STOP_POST] = "stop-post",
1865 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1866 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1867 [SERVICE_MAINTAINANCE] = "maintainance",
1868 [SERVICE_AUTO_RESTART] = "auto-restart",
1871 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1873 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1874 [SERVICE_ONCE] = "once",
1875 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1876 [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1879 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1881 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1882 [SERVICE_FORKING] = "forking",
1883 [SERVICE_SIMPLE] = "simple",
1884 [SERVICE_FINISH] = "finish"
1887 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1889 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1890 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1891 [SERVICE_EXEC_START] = "ExecStart",
1892 [SERVICE_EXEC_START_POST] = "ExecStartPost",
1893 [SERVICE_EXEC_RELOAD] = "ExecReload",
1894 [SERVICE_EXEC_STOP] = "ExecStop",
1895 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1898 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1900 const UnitVTable service_vtable = {
1901 .suffix = ".service",
1903 .init = service_init,
1904 .done = service_done,
1906 .dump = service_dump,
1908 .start = service_start,
1909 .stop = service_stop,
1910 .reload = service_reload,
1912 .can_reload = service_can_reload,
1914 .active_state = service_active_state,
1916 .sigchld_event = service_sigchld_event,
1917 .timer_event = service_timer_event,
1919 .cgroup_notify_empty = service_cgroup_notify_event,
1921 .enumerate = service_enumerate