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,
46 "/boot.d", SPECIAL_BASIC_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 free(s->sysv_runlevels);
78 s->sysv_runlevels = NULL;
80 exec_context_done(&s->exec_context);
81 exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
82 s->control_command = NULL;
84 /* This will leak a process, but at least no memory or any of
86 if (s->main_pid > 0) {
87 unit_unwatch_pid(u, s->main_pid);
91 if (s->control_pid > 0) {
92 unit_unwatch_pid(u, s->control_pid);
96 unit_unwatch_timer(u, &s->timer_watch);
99 static int sysv_translate_name(const char *name, char **_r) {
101 static const char * const table[] = {
102 "$local_fs", SPECIAL_LOCAL_FS_TARGET,
103 "$network", SPECIAL_NETWORK_TARGET,
104 "$named", SPECIAL_NSS_LOOKUP_TARGET,
105 "$portmap", SPECIAL_RPCBIND_TARGET,
106 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
107 "$syslog", SPECIAL_SYSLOG_TARGET,
108 "$time", SPECIAL_RTC_SET_TARGET
114 for (i = 0; i < ELEMENTSOF(table); i += 2)
115 if (streq(table[i], name)) {
116 if (!(r = strdup(table[i+1])))
125 if (asprintf(&r, "%s.service", name) < 0)
136 static int sysv_chkconfig_order(Service *s) {
142 if (s->sysv_start_priority < 0)
145 /* For each pair of services where at least one lacks a LSB
146 * header, we use the start priority value to order things. */
148 LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
152 t = (Service*) other;
157 if (t->sysv_start_priority < 0)
160 /* If both units have modern headers we don't care
161 * about the priorities */
162 if ((!s->sysv_path || s->sysv_has_lsb) &&
163 (!t->sysv_path || t->sysv_has_lsb))
166 if (t->sysv_start_priority < s->sysv_start_priority)
168 else if (t->sysv_start_priority > s->sysv_start_priority)
173 /* FIXME: Maybe we should compare the name here lexicographically? */
175 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
182 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
185 if (!(c = new0(ExecCommand, 1)))
188 if (!(c->path = strdup(path))) {
193 if (!(c->argv = strv_new(path, arg1, NULL))) {
202 static int sysv_exec_commands(Service *s) {
206 assert(s->sysv_path);
208 if (!(c = exec_command_new(s->sysv_path, "start")))
210 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
212 if (!(c = exec_command_new(s->sysv_path, "stop")))
214 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
216 if (!(c = exec_command_new(s->sysv_path, "reload")))
218 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
223 static int priority_from_rcd(Service *s, const char *init_script) {
227 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
228 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
233 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
241 log_warning("opendir() failed on %s: %s", path, strerror(errno));
246 while ((de = readdir(d))) {
249 if (ignore_file(de->d_name))
252 if (de->d_name[0] != 'S')
255 if (strlen(de->d_name) < 4)
258 if (!streq(de->d_name + 3, init_script))
261 /* Yay, we found it! Now decode the priority */
263 a = undecchar(de->d_name[1]);
264 b = undecchar(de->d_name[2]);
269 s->sysv_start_priority = a*10 + b;
271 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
283 static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) {
301 if (!(f = fopen(path, "re"))) {
302 r = errno == ENOENT ? 0 : -errno;
306 s->type = SERVICE_FORKING;
307 s->restart = SERVICE_ONCE;
310 if (!(s->sysv_path = strdup(path))) {
316 char l[LINE_MAX], *t;
318 if (!fgets(l, sizeof(l), f)) {
323 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
333 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
335 s->sysv_has_lsb = true;
339 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
345 t += strspn(t, WHITESPACE);
347 if (state == NORMAL) {
349 /* Try to parse Red Hat style chkconfig headers */
351 if (startswith(t, "chkconfig:")) {
353 char runlevels[16], *k;
357 if (sscanf(t+10, "%15s %i %*i",
359 &start_priority) != 2) {
361 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
365 if (start_priority < 0 || start_priority > 99)
366 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
368 s->sysv_start_priority = start_priority;
370 char_array_0(runlevels);
371 k = delete_chars(runlevels, WHITESPACE "-");
376 if (!(d = strdup(k))) {
381 free(s->sysv_runlevels);
382 s->sysv_runlevels = d;
386 } else if (startswith(t, "description:")) {
388 size_t k = strlen(t);
391 if (t[k-1] == '\\') {
396 if (!(d = strdup(strstrip(t+12)))) {
401 free(u->meta.description);
402 u->meta.description = d;
404 } else if (startswith(t, "pidfile:")) {
411 if (!path_is_absolute(fn)) {
412 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
416 if (!(fn = strdup(fn))) {
425 } else if (state == DESCRIPTION) {
427 /* Try to parse Red Hat style description
430 size_t k = strlen(t);
438 assert(u->meta.description);
439 if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
444 free(u->meta.description);
445 u->meta.description = d;
447 } else if (state == LSB || state == LSB_DESCRIPTION) {
449 if (startswith(t, "Provides:")) {
455 FOREACH_WORD(w, z, t+9, i) {
458 if (!(n = strndup(w, z))) {
463 r = sysv_translate_name(n, &m);
472 if (unit_name_to_type(m) == UNIT_SERVICE)
473 r = unit_add_name(u, m);
475 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
476 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
485 } else if (startswith(t, "Required-Start:") ||
486 startswith(t, "Should-Start:")) {
492 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
495 if (!(n = strndup(w, z))) {
500 r = sysv_translate_name(n, &m);
509 r = unit_add_dependency_by_name(u, UNIT_AFTER, m);
515 } else if (startswith(t, "Default-Start:")) {
520 k = delete_chars(t+14, WHITESPACE "-");
523 if (!(d = strdup(k))) {
528 free(s->sysv_runlevels);
529 s->sysv_runlevels = d;
532 } else if (startswith(t, "Description:")) {
535 state = LSB_DESCRIPTION;
537 if (!(d = strdup(strstrip(t+12)))) {
542 free(u->meta.description);
543 u->meta.description = d;
545 } else if (startswith(t, "Short-Description:") &&
546 !u->meta.description) {
549 /* We use the short description only
550 * if no long description is set. */
554 if (!(d = strdup(strstrip(t+18)))) {
559 u->meta.description = d;
561 } else if (state == LSB_DESCRIPTION) {
563 if (startswith(l, "#\t") || startswith(l, "# ")) {
566 assert(u->meta.description);
567 if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
572 free(u->meta.description);
573 u->meta.description = d;
580 /* If init scripts have no LSB header, then we enforce the
581 * ordering via the chkconfig priorities. We try to determine
582 * a priority for *all* init scripts here, since they are
583 * needed as soon as at least one non-LSB script is used. */
585 if (s->sysv_start_priority < 0) {
586 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
588 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
591 if (s->sysv_start_priority < 0)
592 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
595 if ((r = sysv_exec_commands(s)) < 0)
598 if (!s->sysv_runlevels || chars_intersect("12345", s->sysv_runlevels)) {
599 /* If there a runlevels configured for this service
600 * but none of the standard ones, then we assume this
601 * is some special kind of service (which might be
602 * needed for early boot) and don't create any links
605 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_TARGET)) < 0 ||
606 (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_TARGET)) < 0)
610 *new_state = UNIT_LOADED;
621 static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) {
627 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
631 if (asprintf(&path, "%s/%s", *p, name) < 0)
634 assert(endswith(path, ".service"));
635 path[strlen(path)-8] = 0;
637 r = service_load_sysv_path(s, path, new_state);
643 if (*new_state != UNIT_STUB)
650 static int service_load_sysv(Service *s, UnitLoadState *new_state) {
658 /* Load service data from SysV init scripts, preferably with
661 if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
664 if ((t = unit_id(UNIT(s))))
665 if ((r = service_load_sysv_name(s, t, new_state)) < 0)
668 if (*new_state == UNIT_STUB)
669 SET_FOREACH(t, UNIT(s)->meta.names, i) {
670 if ((r == service_load_sysv_name(s, t, new_state)) < 0)
673 if (*new_state != UNIT_STUB)
680 static int service_init(Unit *u, UnitLoadState *new_state) {
682 Service *s = SERVICE(u);
686 assert(*new_state == UNIT_STUB);
688 /* First, reset everything to the defaults, in case this is a
694 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
695 s->restart_usec = DEFAULT_RESTART_USEC;
697 exec_context_init(&s->exec_context);
699 s->timer_watch.type = WATCH_INVALID;
701 s->state = SERVICE_DEAD;
703 s->sysv_start_priority = -1;
704 s->permissions_start_only = false;
705 s->root_directory_start_only = false;
706 s->valid_no_process = false;
708 s->sysv_has_lsb = false;
709 s->main_pid = s->control_pid = 0;
710 s->main_pid_known = false;
713 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
715 /* Load a .service file */
716 if ((r = unit_load_fragment(u, new_state)) < 0)
719 /* Load a classic init script as a fallback, if we couldn't find anything */
720 if (*new_state == UNIT_STUB)
721 if ((r = service_load_sysv(s, new_state)) < 0)
724 /* Still nothing found? Then let's give up */
725 if (*new_state == UNIT_STUB)
728 /* We were able to load something, then let's add in the
729 * dropin directories. */
730 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
733 /* This is a new unit? Then let's add in some extras */
734 if (*new_state == UNIT_LOADED) {
735 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
738 if ((r = unit_add_default_cgroup(u)) < 0)
741 if ((r = sysv_chkconfig_order(s)) < 0)
748 static void service_dump(Unit *u, FILE *f, const char *prefix) {
750 ServiceExecCommand c;
751 Service *s = SERVICE(u);
757 p2 = strappend(prefix, "\t");
758 prefix2 = p2 ? p2 : prefix;
761 "%sService State: %s\n"
762 "%sPermissionsStartOnly: %s\n"
763 "%sRootDirectoryStartOnly: %s\n"
764 "%sValidNoProcess: %s\n"
767 prefix, service_state_to_string(s->state),
768 prefix, yes_no(s->permissions_start_only),
769 prefix, yes_no(s->root_directory_start_only),
770 prefix, yes_no(s->valid_no_process),
771 prefix, kill_mode_to_string(s->kill_mode),
772 prefix, service_type_to_string(s->type));
774 if (s->control_pid > 0)
776 "%sControl PID: %llu\n",
777 prefix, (unsigned long long) s->control_pid);
781 "%sMain PID: %llu\n",
782 prefix, (unsigned long long) s->main_pid);
787 prefix, s->pid_file);
789 exec_context_dump(&s->exec_context, f, prefix);
791 for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
793 if (!s->exec_command[c])
796 fprintf(f, "%s→ %s:\n",
797 prefix, service_exec_command_to_string(c));
799 exec_command_dump_list(s->exec_command[c], f, prefix2);
804 "%sSysV Init Script Path: %s\n"
805 "%sSysV Init Script has LSB Header: %s\n",
806 prefix, s->sysv_path,
807 prefix, yes_no(s->sysv_has_lsb));
809 if (s->sysv_start_priority >= 0)
811 "%sSysVStartPriority: %i\n",
812 prefix, s->sysv_start_priority);
814 if (s->sysv_runlevels)
815 fprintf(f, "%sSysVRunLevels: %s\n",
816 prefix, s->sysv_runlevels);
821 static int service_load_pid_file(Service *s) {
828 if (s->main_pid_known)
834 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
837 if ((r = safe_atolu(k, &p)) < 0) {
842 if ((unsigned long) (pid_t) p != p)
845 if (kill((pid_t) p, 0) < 0 && errno != EPERM) {
846 log_warning("PID %llu read from file %s does not exist. Your service or init script might be broken.",
847 (unsigned long long) p, s->pid_file);
851 if ((r = unit_watch_pid(UNIT(s), (pid_t) p)) < 0)
852 /* FIXME: we need to do something here */
855 s->main_pid = (pid_t) p;
856 s->main_pid_known = true;
861 static int service_get_sockets(Service *s, Set **_set) {
870 /* Collects all Socket objects that belong to this
871 * service. Note that a service might have multiple sockets
872 * via multiple names. */
874 if (!(set = set_new(NULL, NULL)))
877 SET_FOREACH(t, UNIT(s)->meta.names, i) {
881 /* Look for all socket objects that go by any of our
882 * units and collect their fds */
884 if (!(k = unit_name_change_suffix(t, ".socket"))) {
889 p = manager_get_unit(UNIT(s)->meta.manager, k);
894 if ((r = set_put(set, p)) < 0)
907 static int service_notify_sockets(Service *s) {
915 /* Notifies all our sockets when we die */
917 if ((r = service_get_sockets(s, &set)) < 0)
920 SET_FOREACH(sock, set, i)
921 socket_notify_service_dead(sock);
928 static void service_set_state(Service *s, ServiceState state) {
929 ServiceState old_state;
932 old_state = s->state;
935 if (state != SERVICE_START_PRE &&
936 state != SERVICE_START &&
937 state != SERVICE_START_POST &&
938 state != SERVICE_RELOAD &&
939 state != SERVICE_STOP &&
940 state != SERVICE_STOP_SIGTERM &&
941 state != SERVICE_STOP_SIGKILL &&
942 state != SERVICE_STOP_POST &&
943 state != SERVICE_FINAL_SIGTERM &&
944 state != SERVICE_FINAL_SIGKILL &&
945 state != SERVICE_AUTO_RESTART)
946 unit_unwatch_timer(UNIT(s), &s->timer_watch);
948 if (state != SERVICE_START &&
949 state != SERVICE_START_POST &&
950 state != SERVICE_RUNNING &&
951 state != SERVICE_RELOAD &&
952 state != SERVICE_STOP &&
953 state != SERVICE_STOP_SIGTERM &&
954 state != SERVICE_STOP_SIGKILL)
955 if (s->main_pid > 0) {
956 unit_unwatch_pid(UNIT(s), s->main_pid);
960 if (state != SERVICE_START_PRE &&
961 state != SERVICE_START &&
962 state != SERVICE_START_POST &&
963 state != SERVICE_RELOAD &&
964 state != SERVICE_STOP &&
965 state != SERVICE_STOP_SIGTERM &&
966 state != SERVICE_STOP_SIGKILL &&
967 state != SERVICE_STOP_POST &&
968 state != SERVICE_FINAL_SIGTERM &&
969 state != SERVICE_FINAL_SIGKILL)
970 if (s->control_pid > 0) {
971 unit_unwatch_pid(UNIT(s), s->control_pid);
975 if (state != SERVICE_START_PRE &&
976 state != SERVICE_START &&
977 state != SERVICE_START_POST &&
978 state != SERVICE_RELOAD &&
979 state != SERVICE_STOP &&
980 state != SERVICE_STOP_POST)
981 s->control_command = NULL;
983 if (state == SERVICE_DEAD ||
984 state == SERVICE_STOP ||
985 state == SERVICE_STOP_SIGTERM ||
986 state == SERVICE_STOP_SIGKILL ||
987 state == SERVICE_STOP_POST ||
988 state == SERVICE_FINAL_SIGTERM ||
989 state == SERVICE_FINAL_SIGKILL ||
990 state == SERVICE_MAINTAINANCE ||
991 state == SERVICE_AUTO_RESTART)
992 service_notify_sockets(s);
994 if (old_state == state)
997 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
999 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
1002 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
1006 unsigned rn_fds = 0;
1014 if ((r = service_get_sockets(s, &set)) < 0)
1017 SET_FOREACH(sock, set, i) {
1021 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
1033 if (!(t = new(int, rn_fds+cn_fds))) {
1039 memcpy(t, rfds, rn_fds);
1040 memcpy(t+rn_fds, cfds, cn_fds);
1045 rn_fds = rn_fds+cn_fds;
1063 static int service_spawn(
1068 bool apply_permissions,
1082 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1086 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1089 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1091 if ((r = exec_spawn(c,
1096 UNIT(s)->meta.cgroup_bondings,
1100 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1101 /* FIXME: we need to do something here */
1113 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1118 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1125 if (allow_restart &&
1126 (s->restart == SERVICE_RESTART_ALWAYS ||
1127 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1129 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1132 service_set_state(s, SERVICE_AUTO_RESTART);
1134 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1139 log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1140 service_enter_dead(s, false, false);
1143 static void service_enter_signal(Service *s, ServiceState state, bool success);
1145 static void service_enter_stop_post(Service *s, bool success) {
1152 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1153 if ((r = service_spawn(s,
1157 !s->permissions_start_only,
1158 !s->root_directory_start_only,
1159 &s->control_pid)) < 0)
1163 service_set_state(s, SERVICE_STOP_POST);
1165 if (!s->control_command)
1166 service_enter_dead(s, true, true);
1171 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1172 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1175 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1184 if (s->main_pid > 0 || s->control_pid > 0) {
1187 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1189 if (s->kill_mode == KILL_CONTROL_GROUP) {
1191 if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
1192 if (r != -EAGAIN && r != -ESRCH)
1200 if (s->main_pid > 0) {
1201 if (kill(s->kill_mode == KILL_PROCESS ? s->main_pid : -s->main_pid, sig) < 0 && errno != ESRCH)
1207 if (s->control_pid > 0) {
1208 if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH)
1219 service_set_state(s, state);
1221 if (s->main_pid <= 0 && s->control_pid <= 0)
1222 service_enter_dead(s, true, true);
1227 log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1231 service_set_state(s, state);
1232 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1233 service_enter_stop_post(s, false);
1235 service_enter_dead(s, false, true);
1238 static void service_enter_stop(Service *s, bool success) {
1245 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1246 if ((r = service_spawn(s,
1250 !s->permissions_start_only,
1251 !s->root_directory_start_only,
1252 &s->control_pid)) < 0)
1255 service_set_state(s, SERVICE_STOP);
1257 if (!s->control_command)
1258 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1263 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1264 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1267 static void service_enter_start_post(Service *s) {
1271 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1272 if ((r = service_spawn(s,
1276 !s->permissions_start_only,
1277 !s->root_directory_start_only,
1278 &s->control_pid)) < 0)
1282 service_set_state(s, SERVICE_START_POST);
1284 if (!s->control_command)
1285 service_set_state(s, SERVICE_RUNNING);
1290 log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1291 service_enter_stop(s, false);
1294 static void service_enter_start(Service *s) {
1300 assert(s->exec_command[SERVICE_EXEC_START]);
1301 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1303 if ((r = service_spawn(s,
1304 s->exec_command[SERVICE_EXEC_START],
1305 s->type == SERVICE_FORKING,
1312 service_set_state(s, SERVICE_START);
1314 if (s->type == SERVICE_SIMPLE) {
1315 /* For simple services we immediately start
1316 * the START_POST binaries. */
1319 s->main_pid_known = true;
1320 service_enter_start_post(s);
1322 } else if (s->type == SERVICE_FORKING) {
1324 /* For forking services we wait until the start
1325 * process exited. */
1327 s->control_pid = pid;
1328 s->control_command = s->exec_command[SERVICE_EXEC_START];
1329 } else if (s->type == SERVICE_FINISH) {
1331 /* For finishing services we wait until the start
1332 * process exited, too, but it is our main process. */
1335 s->control_command = s->exec_command[SERVICE_EXEC_START];
1337 assert_not_reached("Unknown service type");
1342 log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1343 service_enter_stop(s, false);
1346 static void service_enter_start_pre(Service *s) {
1351 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1352 if ((r = service_spawn(s,
1356 !s->permissions_start_only,
1357 !s->root_directory_start_only,
1358 &s->control_pid)) < 0)
1361 service_set_state(s, SERVICE_START_PRE);
1363 if (!s->control_command)
1364 service_enter_start(s);
1369 log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1370 service_enter_dead(s, false, true);
1373 static void service_enter_restart(Service *s) {
1377 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1380 log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1381 service_enter_dead(s, true, false);
1386 log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1387 service_enter_dead(s, false, false);
1390 static void service_enter_reload(Service *s) {
1395 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1396 if ((r = service_spawn(s,
1400 !s->permissions_start_only,
1401 !s->root_directory_start_only,
1402 &s->control_pid)) < 0)
1405 service_set_state(s, SERVICE_RELOAD);
1407 if (!s->control_command)
1408 service_set_state(s, SERVICE_RUNNING);
1413 log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1414 service_enter_stop(s, false);
1417 static void service_run_next(Service *s, bool success) {
1421 assert(s->control_command);
1422 assert(s->control_command->command_next);
1427 s->control_command = s->control_command->command_next;
1429 if ((r = service_spawn(s,
1433 !s->permissions_start_only,
1434 !s->root_directory_start_only,
1435 &s->control_pid)) < 0)
1441 log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1443 if (s->state == SERVICE_STOP)
1444 service_enter_stop_post(s, false);
1445 else if (s->state == SERVICE_STOP_POST)
1446 service_enter_dead(s, false, true);
1448 service_enter_stop(s, false);
1451 static int service_start(Unit *u) {
1452 Service *s = SERVICE(u);
1456 /* We cannot fulfill this request right now, try again later
1458 if (s->state == SERVICE_STOP ||
1459 s->state == SERVICE_STOP_SIGTERM ||
1460 s->state == SERVICE_STOP_SIGKILL ||
1461 s->state == SERVICE_STOP_POST ||
1462 s->state == SERVICE_FINAL_SIGTERM ||
1463 s->state == SERVICE_FINAL_SIGKILL)
1466 /* Already on it! */
1467 if (s->state == SERVICE_START_PRE ||
1468 s->state == SERVICE_START ||
1469 s->state == SERVICE_START_POST)
1472 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1474 /* Make sure we don't enter a busy loop of some kind. */
1475 if (!ratelimit_test(&s->ratelimit)) {
1476 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1481 s->main_pid_known = false;
1483 service_enter_start_pre(s);
1487 static int service_stop(Unit *u) {
1488 Service *s = SERVICE(u);
1492 if (s->state == SERVICE_START_PRE ||
1493 s->state == SERVICE_START ||
1494 s->state == SERVICE_START_POST ||
1495 s->state == SERVICE_RELOAD)
1498 if (s->state == SERVICE_AUTO_RESTART) {
1499 service_set_state(s, SERVICE_DEAD);
1503 assert(s->state == SERVICE_RUNNING);
1505 service_enter_stop(s, true);
1509 static int service_reload(Unit *u) {
1510 Service *s = SERVICE(u);
1514 assert(s->state == SERVICE_RUNNING);
1516 service_enter_reload(s);
1520 static bool service_can_reload(Unit *u) {
1521 Service *s = SERVICE(u);
1525 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1528 static UnitActiveState service_active_state(Unit *u) {
1531 return state_translation_table[SERVICE(u)->state];
1534 static int main_pid_good(Service *s) {
1537 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1540 /* If we know the pid file, then lets just check if it is
1542 if (s->main_pid_known)
1543 return s->main_pid > 0;
1545 /* We don't know the pid */
1549 static bool control_pid_good(Service *s) {
1552 return s->control_pid > 0;
1555 static int cgroup_good(Service *s) {
1558 if (s->valid_no_process)
1561 return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1564 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1565 Service *s = SERVICE(u);
1571 success = code == CLD_EXITED && status == 0;
1572 s->failure = s->failure || !success;
1574 if (s->main_pid == pid) {
1576 exec_status_fill(&s->main_exec_status, pid, code, status);
1579 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1580 assert(s->exec_command[SERVICE_EXEC_START]);
1581 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1584 log_debug("%s: main process exited, code=%s, status=%i", unit_id(u), sigchld_code_to_string(code), status);
1586 /* The service exited, so the service is officially
1591 case SERVICE_START_POST:
1592 case SERVICE_RELOAD:
1594 /* Need to wait until the operation is
1599 assert(s->type == SERVICE_FINISH);
1601 /* This was our main goal, so let's go on */
1603 service_enter_start_post(s);
1605 service_enter_stop(s, false);
1608 case SERVICE_RUNNING:
1609 service_enter_stop(s, success);
1612 case SERVICE_STOP_SIGTERM:
1613 case SERVICE_STOP_SIGKILL:
1615 if (!control_pid_good(s))
1616 service_enter_stop_post(s, success);
1618 /* If there is still a control process, wait for that first */
1622 assert_not_reached("Uh, main process died at wrong time.");
1625 } else if (s->control_pid == pid) {
1626 assert(s->control_command);
1628 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1631 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1633 /* If we are shutting things down anyway we
1634 * don't care about failing commands. */
1636 if (s->control_command->command_next &&
1637 (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1639 /* There is another command to *
1640 * execute, so let's do that. */
1642 service_run_next(s, success);
1645 /* No further commands for this step, so let's
1646 * figure out what to do next */
1648 log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1652 case SERVICE_START_PRE:
1654 service_enter_start(s);
1656 service_enter_stop(s, false);
1660 assert(s->type == SERVICE_FORKING);
1662 /* Let's try to load the pid
1663 * file here if we can. We
1664 * ignore the return value,
1665 * since the PID file might
1666 * actually be created by a
1667 * START_POST script */
1671 service_load_pid_file(s);
1673 service_enter_start_post(s);
1675 service_enter_stop(s, false);
1679 case SERVICE_START_POST:
1680 if (success && s->pid_file && !s->main_pid_known) {
1683 /* Hmm, let's see if we can
1684 * load the pid now after the
1685 * start-post scripts got
1688 if ((r = service_load_pid_file(s)) < 0)
1689 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1694 case SERVICE_RELOAD:
1696 if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1697 service_set_state(s, SERVICE_RUNNING);
1699 service_enter_stop(s, true);
1701 service_enter_stop(s, false);
1706 if (main_pid_good(s) > 0)
1707 /* Still not dead and we know the PID? Let's go hunting. */
1708 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1710 service_enter_stop_post(s, success);
1713 case SERVICE_STOP_SIGTERM:
1714 case SERVICE_STOP_SIGKILL:
1715 if (main_pid_good(s) <= 0)
1716 service_enter_stop_post(s, success);
1718 /* If there is still a service
1719 * process around, wait until
1720 * that one quit, too */
1723 case SERVICE_STOP_POST:
1724 case SERVICE_FINAL_SIGTERM:
1725 case SERVICE_FINAL_SIGKILL:
1726 service_enter_dead(s, success, true);
1730 assert_not_reached("Uh, control process died at wrong time.");
1734 assert_not_reached("Got SIGCHLD for unkown PID");
1737 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1738 Service *s = SERVICE(u);
1741 assert(elapsed == 1);
1743 assert(w == &s->timer_watch);
1747 case SERVICE_START_PRE:
1749 case SERVICE_START_POST:
1750 case SERVICE_RELOAD:
1751 log_warning("%s operation timed out. Stopping.", unit_id(u));
1752 service_enter_stop(s, false);
1756 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1757 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1760 case SERVICE_STOP_SIGTERM:
1761 log_warning("%s stopping timed out. Killing.", unit_id(u));
1762 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1765 case SERVICE_STOP_SIGKILL:
1766 /* Uh, wie sent a SIGKILL and it is still not gone?
1767 * Must be something we cannot kill, so let's just be
1768 * weirded out and continue */
1770 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1771 service_enter_stop_post(s, false);
1774 case SERVICE_STOP_POST:
1775 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1776 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1779 case SERVICE_FINAL_SIGTERM:
1780 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1781 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1784 case SERVICE_FINAL_SIGKILL:
1785 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1786 service_enter_dead(s, false, true);
1789 case SERVICE_AUTO_RESTART:
1790 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1791 service_enter_restart(s);
1795 assert_not_reached("Timeout at wrong time.");
1799 static void service_cgroup_notify_event(Unit *u) {
1800 Service *s = SERVICE(u);
1804 log_debug("%s: cgroup is empty", unit_id(u));
1808 /* Waiting for SIGCHLD is usually more interesting,
1809 * because it includes return codes/signals. Which is
1810 * why we ignore the cgroup events for most cases,
1811 * except when we don't know pid which to expect the
1814 case SERVICE_RUNNING:
1816 if (!s->valid_no_process && main_pid_good(s) <= 0)
1817 service_enter_stop(s, true);
1826 static int service_enumerate(Manager *m) {
1830 char *path = NULL, *fpath = NULL, *name = NULL;
1835 STRV_FOREACH(p, m->sysvrcnd_path)
1836 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1841 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1849 if (!(d = opendir(path))) {
1850 if (errno != ENOENT)
1851 log_warning("opendir() failed on %s: %s", path, strerror(errno));
1856 while ((de = readdir(d))) {
1857 Unit *runlevel, *service;
1859 if (ignore_file(de->d_name))
1862 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1865 if (strlen(de->d_name) < 4)
1870 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1875 if (access(fpath, X_OK) < 0) {
1877 if (errno != ENOENT)
1878 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1885 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1890 if ((r = manager_load_unit(m, name, &service)) < 0)
1893 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1896 if (de->d_name[0] == 'S') {
1897 if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1900 if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1903 } else if (de->d_name[0] == 'K' &&
1904 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1905 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1907 /* We honour K links only for
1908 * halt/reboot. For the normal
1909 * runlevels we assume the
1911 * implicitly added by the
1914 if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1917 if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1934 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1935 [SERVICE_DEAD] = "dead",
1936 [SERVICE_START_PRE] = "start-pre",
1937 [SERVICE_START] = "start",
1938 [SERVICE_START_POST] = "start-post",
1939 [SERVICE_RUNNING] = "running",
1940 [SERVICE_RELOAD] = "reload",
1941 [SERVICE_STOP] = "stop",
1942 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1943 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1944 [SERVICE_STOP_POST] = "stop-post",
1945 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1946 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1947 [SERVICE_MAINTAINANCE] = "maintainance",
1948 [SERVICE_AUTO_RESTART] = "auto-restart",
1951 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1953 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1954 [SERVICE_ONCE] = "once",
1955 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1956 [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1959 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1961 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1962 [SERVICE_FORKING] = "forking",
1963 [SERVICE_SIMPLE] = "simple",
1964 [SERVICE_FINISH] = "finish"
1967 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1969 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1970 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1971 [SERVICE_EXEC_START] = "ExecStart",
1972 [SERVICE_EXEC_START_POST] = "ExecStartPost",
1973 [SERVICE_EXEC_RELOAD] = "ExecReload",
1974 [SERVICE_EXEC_STOP] = "ExecStop",
1975 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1978 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1980 const UnitVTable service_vtable = {
1981 .suffix = ".service",
1983 .init = service_init,
1984 .done = service_done,
1986 .dump = service_dump,
1988 .start = service_start,
1989 .stop = service_stop,
1990 .reload = service_reload,
1992 .can_reload = service_can_reload,
1994 .active_state = service_active_state,
1996 .sigchld_event = service_sigchld_event,
1997 .timer_event = service_timer_event,
1999 .cgroup_notify_empty = service_cgroup_notify_event,
2001 .enumerate = service_enumerate