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
48 static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
49 [SERVICE_DEAD] = UNIT_INACTIVE,
50 [SERVICE_START_PRE] = UNIT_ACTIVATING,
51 [SERVICE_START] = UNIT_ACTIVATING,
52 [SERVICE_START_POST] = UNIT_ACTIVATING,
53 [SERVICE_RUNNING] = UNIT_ACTIVE,
54 [SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
55 [SERVICE_STOP] = UNIT_DEACTIVATING,
56 [SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
57 [SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
58 [SERVICE_STOP_POST] = UNIT_DEACTIVATING,
59 [SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
60 [SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
61 [SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
62 [SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
65 static void service_done(Unit *u) {
66 Service *s = SERVICE(u);
76 exec_context_done(&s->exec_context);
77 exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
78 s->control_command = NULL;
80 /* This will leak a process, but at least no memory or any of
82 if (s->main_pid > 0) {
83 unit_unwatch_pid(u, s->main_pid);
87 if (s->control_pid > 0) {
88 unit_unwatch_pid(u, s->control_pid);
92 unit_unwatch_timer(u, &s->timer_watch);
95 static int sysv_translate_name(const char *name, char **_r) {
97 static const char * const table[] = {
98 "$local_fs", SPECIAL_LOCAL_FS_TARGET,
99 "$network", SPECIAL_NETWORK_TARGET,
100 "$named", SPECIAL_NSS_LOOKUP_TARGET,
101 "$portmap", SPECIAL_RPCBIND_TARGET,
102 "$remote_fs", SPECIAL_REMOTE_FS_TARGET,
103 "$syslog", SPECIAL_SYSLOG_TARGET,
104 "$time", SPECIAL_RTC_SET_TARGET
110 for (i = 0; i < ELEMENTSOF(table); i += 2)
111 if (streq(table[i], name)) {
112 if (!(r = strdup(table[i+1])))
121 if (asprintf(&r, "%s.service", name) < 0)
132 static int sysv_chkconfig_order(Service *s) {
138 if (s->sysv_start_priority < 0)
141 /* For each pair of services where at least one lacks a LSB
142 * header, we use the start priority value to order things. */
144 LIST_FOREACH(units_per_type, other, UNIT(s)->meta.manager->units_per_type[UNIT_SERVICE]) {
148 t = (Service*) other;
153 if (t->sysv_start_priority < 0)
156 if (s->sysv_has_lsb && t->sysv_has_lsb)
159 if (t->sysv_start_priority < s->sysv_start_priority)
161 else if (t->sysv_start_priority > s->sysv_start_priority)
166 /* FIXME: Maybe we should compare the name here lexicographically? */
168 if (!(r = unit_add_dependency(UNIT(s), d, UNIT(t))) < 0)
175 static ExecCommand *exec_command_new(const char *path, const char *arg1) {
178 if (!(c = new0(ExecCommand, 1)))
181 if (!(c->path = strdup(path))) {
186 if (!(c->argv = strv_new(path, arg1, NULL))) {
195 static int sysv_exec_commands(Service *s) {
199 assert(s->sysv_path);
201 if (!(c = exec_command_new(s->sysv_path, "start")))
203 exec_command_append_list(s->exec_command+SERVICE_EXEC_START, c);
205 if (!(c = exec_command_new(s->sysv_path, "stop")))
207 exec_command_append_list(s->exec_command+SERVICE_EXEC_STOP, c);
209 if (!(c = exec_command_new(s->sysv_path, "reload")))
211 exec_command_append_list(s->exec_command+SERVICE_EXEC_RELOAD, c);
216 static int priority_from_rcd(Service *s, const char *init_script) {
220 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvrcnd_path)
221 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
226 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0)
234 log_warning("opendir() failed on %s: %s", path, strerror(errno));
239 while ((de = readdir(d))) {
242 if (ignore_file(de->d_name))
245 if (de->d_name[0] != 'S')
248 if (strlen(de->d_name) < 4)
251 if (!streq(de->d_name + 3, init_script))
254 /* Yay, we found it! Now decode the priority */
256 a = undecchar(de->d_name[1]);
257 b = undecchar(de->d_name[2]);
262 s->sysv_start_priority = a*10 + b;
264 log_debug("Determined priority %i from link farm for %s", s->sysv_start_priority, unit_id(UNIT(s)));
276 static int service_load_sysv_path(Service *s, const char *path, UnitLoadState *new_state) {
294 if (!(f = fopen(path, "re"))) {
295 r = errno == ENOENT ? 0 : -errno;
299 s->type = SERVICE_FORKING;
300 s->restart = SERVICE_ONCE;
303 if (!(s->sysv_path = strdup(path))) {
309 char l[LINE_MAX], *t;
311 if (!fgets(l, sizeof(l), f)) {
316 log_error("Failed to read configuration file '%s': %s", path, strerror(-r));
326 if (state == NORMAL && streq(t, "### BEGIN INIT INFO")) {
328 s->sysv_has_lsb = true;
332 if ((state == LSB_DESCRIPTION || state == LSB) && streq(t, "### END INIT INFO")) {
338 t += strspn(t, WHITESPACE);
340 if (state == NORMAL) {
342 /* Try to parse Red Hat style chkconfig headers */
344 if (startswith(t, "chkconfig:")) {
349 if (sscanf(t+10, "%*15s %i %*i",
350 &start_priority) != 1) {
352 log_warning("[%s:%u] Failed to parse chkconfig line. Ignoring.", path, line);
356 if (start_priority < 0 || start_priority > 99) {
357 log_warning("[%s:%u] Start priority out of range. Ignoring.", path, line);
361 s->sysv_start_priority = start_priority;
363 } else if (startswith(t, "description:")) {
365 size_t k = strlen(t);
368 if (t[k-1] == '\\') {
373 if (!(d = strdup(strstrip(t+12)))) {
378 free(u->meta.description);
379 u->meta.description = d;
381 } else if (startswith(t, "pidfile:")) {
388 if (!path_is_absolute(fn)) {
389 log_warning("[%s:%u] PID file not absolute. Ignoring.", path, line);
393 if (!(fn = strdup(fn))) {
402 } else if (state == DESCRIPTION) {
404 /* Try to parse Red Hat style description
407 size_t k = strlen(t);
415 assert(u->meta.description);
416 if (asprintf(&d, "%s %s", u->meta.description, strstrip(t)) < 0) {
421 free(u->meta.description);
422 u->meta.description = d;
424 } else if (state == LSB || state == LSB_DESCRIPTION) {
426 if (startswith(t, "Provides:")) {
432 FOREACH_WORD(w, z, t+9, i) {
435 if (!(n = strndup(w, z))) {
440 r = sysv_translate_name(n, &m);
449 if (unit_name_to_type(m) == UNIT_SERVICE)
450 r = unit_add_name(u, m);
452 if ((r = unit_add_dependency_by_name_inverse(u, UNIT_REQUIRES, m)) >= 0)
453 r = unit_add_dependency_by_name(u, UNIT_BEFORE, m);
462 } else if (startswith(t, "Required-Start:") ||
463 startswith(t, "Should-Start:")) {
469 FOREACH_WORD(w, z, strchr(t, ':')+1, i) {
472 if (!(n = strndup(w, z))) {
477 r = sysv_translate_name(n, &m);
486 if (!(r = unit_add_dependency_by_name(u, UNIT_AFTER, m)) < 0) {
491 r = unit_add_dependency_by_name(
493 startswith(t, "Required-Start:") ? UNIT_REQUIRES : UNIT_WANTS,
501 } else if (startswith(t, "Description:")) {
504 state = LSB_DESCRIPTION;
506 if (!(d = strdup(strstrip(t+12)))) {
511 free(u->meta.description);
512 u->meta.description = d;
514 } else if (startswith(t, "Short-Description:") && !u->meta.description) {
517 /* We use the short description only
518 * if no long description is set. */
522 if (!(d = strdup(strstrip(t+18)))) {
527 free(u->meta.description);
528 u->meta.description = d;
530 } else if (state == LSB_DESCRIPTION) {
532 if (startswith(l, "#\t") || startswith(l, "# ")) {
535 assert(u->meta.description);
536 if (asprintf(&d, "%s %s", u->meta.description, t) < 0) {
541 free(u->meta.description);
542 u->meta.description = d;
549 /* If init scripts have no LSB header, then we enforce the
550 * ordering via the chkconfig priorities. We try to determine
551 * a priority for *all* init scripts here, since they are
552 * needed as soon as at least one non-LSB script is used. */
554 if (s->sysv_start_priority < 0) {
555 log_debug("%s has no chkconfig header, trying to determine SysV priority from link farm.", unit_id(u));
557 if ((r = priority_from_rcd(s, file_name_from_path(path))) < 0)
560 if (s->sysv_start_priority < 0)
561 log_warning("%s has neither a chkconfig header nor a directory link, cannot order unit!", unit_id(u));
564 if ((r = sysv_exec_commands(s)) < 0)
567 if ((r = unit_add_dependency_by_name(u, UNIT_REQUIRES, SPECIAL_BASIC_SERVICE)) < 0 ||
568 (r = unit_add_dependency_by_name(u, UNIT_AFTER, SPECIAL_BASIC_SERVICE)) < 0)
571 *new_state = UNIT_LOADED;
582 static int service_load_sysv_name(Service *s, const char *name, UnitLoadState *new_state) {
588 STRV_FOREACH(p, UNIT(s)->meta.manager->sysvinit_path) {
592 if (asprintf(&path, "%s/%s", *p, name) < 0)
595 assert(endswith(path, ".service"));
596 path[strlen(path)-8] = 0;
598 r = service_load_sysv_path(s, path, new_state);
604 if (*new_state != UNIT_STUB)
611 static int service_load_sysv(Service *s, UnitLoadState *new_state) {
619 /* Load service data from SysV init scripts, preferably with
622 if (strv_isempty(UNIT(s)->meta.manager->sysvinit_path))
625 if ((t = unit_id(UNIT(s))))
626 if ((r = service_load_sysv_name(s, t, new_state)) < 0)
629 if (*new_state == UNIT_STUB)
630 SET_FOREACH(t, UNIT(s)->meta.names, i) {
631 if ((r == service_load_sysv_name(s, t, new_state)) < 0)
634 if (*new_state != UNIT_STUB)
641 static int service_init(Unit *u, UnitLoadState *new_state) {
643 Service *s = SERVICE(u);
647 assert(*new_state == UNIT_STUB);
649 /* First, reset everything to the defaults, in case this is a
655 s->timeout_usec = DEFAULT_TIMEOUT_USEC;
656 s->restart_usec = DEFAULT_RESTART_USEC;
658 exec_context_init(&s->exec_context);
660 s->timer_watch.type = WATCH_INVALID;
662 s->state = SERVICE_DEAD;
664 s->sysv_start_priority = -1;
665 s->permissions_start_only = false;
666 s->root_directory_start_only = false;
668 s->sysv_has_lsb = false;
670 RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
672 /* Load a .service file */
673 if ((r = unit_load_fragment(u, new_state)) < 0)
676 /* Load a classic init script as a fallback, if we couldn't find anything */
677 if (*new_state == UNIT_STUB)
678 if ((r = service_load_sysv(s, new_state)) < 0)
681 /* Still nothing found? Then let's give up */
682 if (*new_state == UNIT_STUB)
685 /* We were able to load something, then let's add in the
686 * dropin directories. */
687 if ((r = unit_load_dropin(unit_follow_merge(u))) < 0)
690 /* This is a new unit? Then let's add in some extras */
691 if (*new_state == UNIT_LOADED) {
692 if ((r = unit_add_exec_dependencies(u, &s->exec_context)) < 0)
695 if ((r = unit_add_default_cgroup(u)) < 0)
698 if ((r = sysv_chkconfig_order(s)) < 0)
705 static void service_dump(Unit *u, FILE *f, const char *prefix) {
707 ServiceExecCommand c;
708 Service *s = SERVICE(u);
714 p2 = strappend(prefix, "\t");
715 prefix2 = p2 ? p2 : prefix;
718 "%sService State: %s\n"
719 "%sPermissionsStartOnly: %s\n"
720 "%sRootDirectoryStartOnly: %s\n"
721 "%sValidNoProcess: %s\n"
723 prefix, service_state_to_string(s->state),
724 prefix, yes_no(s->permissions_start_only),
725 prefix, yes_no(s->root_directory_start_only),
726 prefix, yes_no(s->valid_no_process),
727 prefix, service_type_to_string(s->type));
732 prefix, s->pid_file);
734 exec_context_dump(&s->exec_context, f, prefix);
736 for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
738 if (!s->exec_command[c])
741 fprintf(f, "%s→ %s:\n",
742 prefix, service_exec_command_to_string(c));
744 exec_command_dump_list(s->exec_command[c], f, prefix2);
749 "%sSysV Init Script Path: %s\n"
750 "%sSysV Init Script has LSB Header: %s\n",
751 prefix, s->sysv_path,
752 prefix, yes_no(s->sysv_has_lsb));
754 if (s->sysv_start_priority >= 0)
756 "%sSysVStartPriority: %i\n",
757 prefix, s->sysv_start_priority);
763 static int service_load_pid_file(Service *s) {
770 if (s->main_pid_known)
776 if ((r = read_one_line_file(s->pid_file, &k)) < 0)
779 if ((r = safe_atolu(k, &p)) < 0) {
784 if ((unsigned long) (pid_t) p != p)
788 s->main_pid_known = true;
793 static int service_get_sockets(Service *s, Set **_set) {
802 /* Collects all Socket objects that belong to this
803 * service. Note that a service might have multiple sockets
804 * via multiple names. */
806 if (!(set = set_new(NULL, NULL)))
809 SET_FOREACH(t, UNIT(s)->meta.names, i) {
813 /* Look for all socket objects that go by any of our
814 * units and collect their fds */
816 if (!(k = unit_name_change_suffix(t, ".socket"))) {
821 p = manager_get_unit(UNIT(s)->meta.manager, k);
826 if ((r = set_put(set, p)) < 0)
839 static int service_notify_sockets(Service *s) {
847 /* Notifies all our sockets when we die */
849 if ((r = service_get_sockets(s, &set)) < 0)
852 SET_FOREACH(sock, set, i)
853 socket_notify_service_dead(sock);
860 static void service_set_state(Service *s, ServiceState state) {
861 ServiceState old_state;
864 old_state = s->state;
867 if (state != SERVICE_START_PRE &&
868 state != SERVICE_START &&
869 state != SERVICE_START_POST &&
870 state != SERVICE_RELOAD &&
871 state != SERVICE_STOP &&
872 state != SERVICE_STOP_SIGTERM &&
873 state != SERVICE_STOP_SIGKILL &&
874 state != SERVICE_STOP_POST &&
875 state != SERVICE_FINAL_SIGTERM &&
876 state != SERVICE_FINAL_SIGKILL &&
877 state != SERVICE_AUTO_RESTART)
878 unit_unwatch_timer(UNIT(s), &s->timer_watch);
880 if (state != SERVICE_START &&
881 state != SERVICE_START_POST &&
882 state != SERVICE_RUNNING &&
883 state != SERVICE_RELOAD &&
884 state != SERVICE_STOP &&
885 state != SERVICE_STOP_SIGTERM &&
886 state != SERVICE_STOP_SIGKILL)
887 if (s->main_pid > 0) {
888 unit_unwatch_pid(UNIT(s), s->main_pid);
892 if (state != SERVICE_START_PRE &&
893 state != SERVICE_START &&
894 state != SERVICE_START_POST &&
895 state != SERVICE_RELOAD &&
896 state != SERVICE_STOP &&
897 state != SERVICE_STOP_SIGTERM &&
898 state != SERVICE_STOP_SIGKILL &&
899 state != SERVICE_STOP_POST &&
900 state != SERVICE_FINAL_SIGTERM &&
901 state != SERVICE_FINAL_SIGKILL)
902 if (s->control_pid > 0) {
903 unit_unwatch_pid(UNIT(s), s->control_pid);
907 if (state != SERVICE_START_PRE &&
908 state != SERVICE_START &&
909 state != SERVICE_START_POST &&
910 state != SERVICE_RELOAD &&
911 state != SERVICE_STOP &&
912 state != SERVICE_STOP_POST)
913 s->control_command = NULL;
915 if (state == SERVICE_DEAD ||
916 state == SERVICE_STOP ||
917 state == SERVICE_STOP_SIGTERM ||
918 state == SERVICE_STOP_SIGKILL ||
919 state == SERVICE_STOP_POST ||
920 state == SERVICE_FINAL_SIGTERM ||
921 state == SERVICE_FINAL_SIGKILL ||
922 state == SERVICE_MAINTAINANCE ||
923 state == SERVICE_AUTO_RESTART)
924 service_notify_sockets(s);
926 log_debug("%s changed %s → %s", unit_id(UNIT(s)), service_state_to_string(old_state), service_state_to_string(state));
928 unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
931 static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
943 if ((r = service_get_sockets(s, &set)) < 0)
946 SET_FOREACH(sock, set, i) {
950 if ((r = socket_collect_fds(sock, &cfds, &cn_fds)) < 0)
962 if (!(t = new(int, rn_fds+cn_fds))) {
968 memcpy(t, rfds, rn_fds);
969 memcpy(t+rn_fds, cfds, cn_fds);
974 rn_fds = rn_fds+cn_fds;
992 static int service_spawn(
997 bool apply_permissions,
1011 if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
1015 if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
1018 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1020 if ((r = exec_spawn(c,
1025 UNIT(s)->meta.cgroup_bondings,
1029 if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
1030 /* FIXME: we need to do something here */
1042 unit_unwatch_timer(UNIT(s), &s->timer_watch);
1047 static void service_enter_dead(Service *s, bool success, bool allow_restart) {
1054 if (allow_restart &&
1055 (s->restart == SERVICE_RESTART_ALWAYS ||
1056 (s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
1058 if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
1061 service_set_state(s, SERVICE_AUTO_RESTART);
1063 service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
1068 log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
1069 service_enter_dead(s, false, false);
1072 static void service_enter_signal(Service *s, ServiceState state, bool success);
1074 static void service_enter_stop_post(Service *s, bool success) {
1081 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
1082 if ((r = service_spawn(s,
1086 !s->permissions_start_only,
1087 !s->root_directory_start_only,
1088 &s->control_pid)) < 0)
1092 service_set_state(s, SERVICE_STOP_POST);
1094 if (!s->control_command)
1095 service_enter_dead(s, true, true);
1100 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1101 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1104 static void service_enter_signal(Service *s, ServiceState state, bool success) {
1113 if (s->main_pid > 0 || s->control_pid > 0) {
1116 sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
1119 if (s->main_pid > 0) {
1120 if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
1126 if (s->control_pid > 0) {
1127 if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
1137 service_set_state(s, state);
1139 if (s->main_pid <= 0 && s->control_pid <= 0)
1140 service_enter_dead(s, true, true);
1145 log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
1149 service_set_state(s, state);
1150 } else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
1151 service_enter_stop_post(s, false);
1153 service_enter_dead(s, false, true);
1156 static void service_enter_stop(Service *s, bool success) {
1163 if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
1164 if ((r = service_spawn(s,
1168 !s->permissions_start_only,
1169 !s->root_directory_start_only,
1170 &s->control_pid)) < 0)
1173 service_set_state(s, SERVICE_STOP);
1175 if (!s->control_command)
1176 service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
1181 log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
1182 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1185 static void service_enter_start_post(Service *s) {
1189 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
1190 if ((r = service_spawn(s,
1194 !s->permissions_start_only,
1195 !s->root_directory_start_only,
1196 &s->control_pid)) < 0)
1200 service_set_state(s, SERVICE_START_POST);
1202 if (!s->control_command)
1203 service_set_state(s, SERVICE_RUNNING);
1208 log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
1209 service_enter_stop(s, false);
1212 static void service_enter_start(Service *s) {
1218 assert(s->exec_command[SERVICE_EXEC_START]);
1219 assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
1221 if ((r = service_spawn(s,
1222 s->exec_command[SERVICE_EXEC_START],
1223 s->type == SERVICE_FORKING,
1230 service_set_state(s, SERVICE_START);
1232 if (s->type == SERVICE_SIMPLE) {
1233 /* For simple services we immediately start
1234 * the START_POST binaries. */
1237 s->main_pid_known = true;
1238 service_enter_start_post(s);
1240 } else if (s->type == SERVICE_FORKING) {
1242 /* For forking services we wait until the start
1243 * process exited. */
1245 s->control_pid = pid;
1246 s->control_command = s->exec_command[SERVICE_EXEC_START];
1247 } else if (s->type == SERVICE_FINISH) {
1249 /* For finishing services we wait until the start
1250 * process exited, too, but it is our main process. */
1253 s->control_command = s->exec_command[SERVICE_EXEC_START];
1255 assert_not_reached("Unknown service type");
1260 log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
1261 service_enter_stop(s, false);
1264 static void service_enter_start_pre(Service *s) {
1269 if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
1270 if ((r = service_spawn(s,
1274 !s->permissions_start_only,
1275 !s->root_directory_start_only,
1276 &s->control_pid)) < 0)
1279 service_set_state(s, SERVICE_START_PRE);
1281 if (!s->control_command)
1282 service_enter_start(s);
1287 log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
1288 service_enter_dead(s, false, true);
1291 static void service_enter_restart(Service *s) {
1295 if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
1298 log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
1299 service_enter_dead(s, true, false);
1304 log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
1305 service_enter_dead(s, false, false);
1308 static void service_enter_reload(Service *s) {
1313 if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
1314 if ((r = service_spawn(s,
1318 !s->permissions_start_only,
1319 !s->root_directory_start_only,
1320 &s->control_pid)) < 0)
1323 service_set_state(s, SERVICE_RELOAD);
1325 if (!s->control_command)
1326 service_set_state(s, SERVICE_RUNNING);
1331 log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
1332 service_enter_stop(s, false);
1335 static void service_run_next(Service *s, bool success) {
1339 assert(s->control_command);
1340 assert(s->control_command->command_next);
1345 s->control_command = s->control_command->command_next;
1347 if ((r = service_spawn(s,
1351 !s->permissions_start_only,
1352 !s->root_directory_start_only,
1353 &s->control_pid)) < 0)
1359 log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
1361 if (s->state == SERVICE_STOP)
1362 service_enter_stop_post(s, false);
1363 else if (s->state == SERVICE_STOP_POST)
1364 service_enter_dead(s, false, true);
1366 service_enter_stop(s, false);
1369 static int service_start(Unit *u) {
1370 Service *s = SERVICE(u);
1374 /* We cannot fulfill this request right now, try again later
1376 if (s->state == SERVICE_STOP ||
1377 s->state == SERVICE_STOP_SIGTERM ||
1378 s->state == SERVICE_STOP_SIGKILL ||
1379 s->state == SERVICE_STOP_POST ||
1380 s->state == SERVICE_FINAL_SIGTERM ||
1381 s->state == SERVICE_FINAL_SIGKILL)
1384 /* Already on it! */
1385 if (s->state == SERVICE_START_PRE ||
1386 s->state == SERVICE_START ||
1387 s->state == SERVICE_START_POST)
1390 assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
1392 /* Make sure we don't enter a busy loop of some kind. */
1393 if (!ratelimit_test(&s->ratelimit)) {
1394 log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
1399 s->main_pid_known = false;
1401 service_enter_start_pre(s);
1405 static int service_stop(Unit *u) {
1406 Service *s = SERVICE(u);
1410 if (s->state == SERVICE_START_PRE ||
1411 s->state == SERVICE_START ||
1412 s->state == SERVICE_START_POST ||
1413 s->state == SERVICE_RELOAD)
1416 if (s->state == SERVICE_AUTO_RESTART) {
1417 service_set_state(s, SERVICE_DEAD);
1421 assert(s->state == SERVICE_RUNNING);
1423 service_enter_stop(s, true);
1427 static int service_reload(Unit *u) {
1428 Service *s = SERVICE(u);
1432 assert(s->state == SERVICE_RUNNING);
1434 service_enter_reload(s);
1438 static bool service_can_reload(Unit *u) {
1439 Service *s = SERVICE(u);
1443 return !!s->exec_command[SERVICE_EXEC_RELOAD];
1446 static UnitActiveState service_active_state(Unit *u) {
1449 return state_translation_table[SERVICE(u)->state];
1452 static int main_pid_good(Service *s) {
1455 /* Returns 0 if the pid is dead, 1 if it is good, -1 if we
1458 /* If we know the pid file, then lets just check if it is
1460 if (s->main_pid_known)
1461 return s->main_pid > 0;
1463 /* We don't know the pid */
1467 static bool control_pid_good(Service *s) {
1470 return s->control_pid > 0;
1473 static int cgroup_good(Service *s) {
1476 if (s->valid_no_process)
1479 return cgroup_bonding_is_empty_list(UNIT(s)->meta.cgroup_bondings);
1482 static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
1483 Service *s = SERVICE(u);
1489 success = code == CLD_EXITED && status == 0;
1490 s->failure = s->failure || !success;
1492 if (s->main_pid == pid) {
1494 exec_status_fill(&s->main_exec_status, pid, code, status);
1497 if (s->type == SERVICE_SIMPLE || s->type == SERVICE_FINISH) {
1498 assert(s->exec_command[SERVICE_EXEC_START]);
1499 s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
1502 log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1504 /* The service exited, so the service is officially
1509 case SERVICE_START_POST:
1510 case SERVICE_RELOAD:
1512 /* Need to wait until the operation is
1517 assert(s->type == SERVICE_FINISH);
1519 /* This was our main goal, so let's go on */
1521 service_enter_start_post(s);
1523 service_enter_stop(s, false);
1526 case SERVICE_RUNNING:
1527 service_enter_stop(s, success);
1530 case SERVICE_STOP_SIGTERM:
1531 case SERVICE_STOP_SIGKILL:
1533 if (!control_pid_good(s))
1534 service_enter_stop_post(s, success);
1536 /* If there is still a control process, wait for that first */
1540 assert_not_reached("Uh, main process died at wrong time.");
1543 } else if (s->control_pid == pid) {
1544 assert(s->control_command);
1546 exec_status_fill(&s->control_command->exec_status, pid, code, status);
1549 log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code_to_string(code), status);
1551 /* If we are shutting things down anyway we
1552 * don't care about failing commands. */
1554 if (s->control_command->command_next &&
1555 (success || (s->state == SERVICE_STOP || s->state == SERVICE_STOP_POST)))
1557 /* There is another command to *
1558 * execute, so let's do that. */
1560 service_run_next(s, success);
1563 /* No further commands for this step, so let's
1564 * figure out what to do next */
1566 log_debug("%s got final SIGCHLD for state %s", unit_id(u), service_state_to_string(s->state));
1570 case SERVICE_START_PRE:
1572 service_enter_start(s);
1574 service_enter_stop(s, false);
1578 assert(s->type == SERVICE_FORKING);
1580 /* Let's try to load the pid
1581 * file here if we can. We
1582 * ignore the return value,
1583 * since the PID file might
1584 * actually be created by a
1585 * START_POST script */
1589 service_load_pid_file(s);
1591 service_enter_start_post(s);
1593 service_enter_stop(s, false);
1597 case SERVICE_START_POST:
1598 if (success && s->pid_file && !s->main_pid_known) {
1601 /* Hmm, let's see if we can
1602 * load the pid now after the
1603 * start-post scripts got
1606 if ((r = service_load_pid_file(s)) < 0)
1607 log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
1612 case SERVICE_RELOAD:
1614 if (main_pid_good(s) != 0 && cgroup_good(s) != 0)
1615 service_set_state(s, SERVICE_RUNNING);
1617 service_enter_stop(s, true);
1619 service_enter_stop(s, false);
1624 if (main_pid_good(s) > 0)
1625 /* Still not dead and we know the PID? Let's go hunting. */
1626 service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
1628 service_enter_stop_post(s, success);
1631 case SERVICE_STOP_SIGTERM:
1632 case SERVICE_STOP_SIGKILL:
1633 if (main_pid_good(s) <= 0)
1634 service_enter_stop_post(s, success);
1636 /* If there is still a service
1637 * process around, wait until
1638 * that one quit, too */
1641 case SERVICE_STOP_POST:
1642 case SERVICE_FINAL_SIGTERM:
1643 case SERVICE_FINAL_SIGKILL:
1644 service_enter_dead(s, success, true);
1648 assert_not_reached("Uh, control process died at wrong time.");
1652 assert_not_reached("Got SIGCHLD for unkown PID");
1655 static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
1656 Service *s = SERVICE(u);
1659 assert(elapsed == 1);
1661 assert(w == &s->timer_watch);
1665 case SERVICE_START_PRE:
1667 case SERVICE_START_POST:
1668 case SERVICE_RELOAD:
1669 log_warning("%s operation timed out. Stopping.", unit_id(u));
1670 service_enter_stop(s, false);
1674 log_warning("%s stopping timed out. Terminating.", unit_id(u));
1675 service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
1678 case SERVICE_STOP_SIGTERM:
1679 log_warning("%s stopping timed out. Killing.", unit_id(u));
1680 service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
1683 case SERVICE_STOP_SIGKILL:
1684 /* Uh, wie sent a SIGKILL and it is still not gone?
1685 * Must be something we cannot kill, so let's just be
1686 * weirded out and continue */
1688 log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
1689 service_enter_stop_post(s, false);
1692 case SERVICE_STOP_POST:
1693 log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
1694 service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
1697 case SERVICE_FINAL_SIGTERM:
1698 log_warning("%s stopping timed out (2). Killing.", unit_id(u));
1699 service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
1702 case SERVICE_FINAL_SIGKILL:
1703 log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
1704 service_enter_dead(s, false, true);
1707 case SERVICE_AUTO_RESTART:
1708 log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
1709 service_enter_restart(s);
1713 assert_not_reached("Timeout at wrong time.");
1717 static void service_cgroup_notify_event(Unit *u) {
1718 Service *s = SERVICE(u);
1722 log_debug("%s: cgroup is empty", unit_id(u));
1726 /* Waiting for SIGCHLD is usually more interesting,
1727 * because it includes return codes/signals. Which is
1728 * why we ignore the cgroup events for most cases,
1729 * except when we don't know pid which to expect the
1732 case SERVICE_RUNNING:
1734 if (!s->valid_no_process && main_pid_good(s) <= 0)
1735 service_enter_stop(s, true);
1744 static int service_enumerate(Manager *m) {
1748 char *path = NULL, *fpath = NULL, *name = NULL;
1753 STRV_FOREACH(p, m->sysvrcnd_path)
1754 for (i = 0; i < ELEMENTSOF(rcnd_table); i += 2) {
1759 if (asprintf(&path, "%s/%s", *p, rcnd_table[i]) < 0) {
1767 if (!(d = opendir(path))) {
1768 if (errno != ENOENT)
1769 log_warning("opendir() failed on %s: %s", path, strerror(errno));
1774 while ((de = readdir(d))) {
1775 Unit *runlevel, *service;
1777 if (ignore_file(de->d_name))
1780 if (de->d_name[0] != 'S' && de->d_name[0] != 'K')
1783 if (strlen(de->d_name) < 4)
1788 if (asprintf(&fpath, "%s/%s/%s", *p, rcnd_table[i], de->d_name) < 0) {
1793 if (access(fpath, X_OK) < 0) {
1795 if (errno != ENOENT)
1796 log_warning("access() failed on %s: %s", fpath, strerror(errno));
1803 if (asprintf(&name, "%s.service", de->d_name+3) < 0) {
1808 if ((r = manager_load_unit(m, name, &service)) < 0)
1811 if ((r = manager_load_unit(m, rcnd_table[i+1], &runlevel)) < 0)
1814 if (de->d_name[0] == 'S') {
1815 if ((r = unit_add_dependency(runlevel, UNIT_WANTS, service)) < 0)
1818 if ((r = unit_add_dependency(runlevel, UNIT_AFTER, service)) < 0)
1821 } else if (de->d_name[0] == 'K' &&
1822 (streq(rcnd_table[i+1], SPECIAL_RUNLEVEL0_TARGET) ||
1823 streq(rcnd_table[i+1], SPECIAL_RUNLEVEL6_TARGET))) {
1825 /* We honour K links only for
1826 * halt/reboot. For the normal
1827 * runlevels we assume the
1829 * implicitly added by the
1832 if ((r = unit_add_dependency(runlevel, UNIT_CONFLICTS, service)) < 0)
1835 if ((r = unit_add_dependency(runlevel, UNIT_BEFORE, service)) < 0)
1852 static const char* const service_state_table[_SERVICE_STATE_MAX] = {
1853 [SERVICE_DEAD] = "dead",
1854 [SERVICE_START_PRE] = "start-pre",
1855 [SERVICE_START] = "start",
1856 [SERVICE_START_POST] = "start-post",
1857 [SERVICE_RUNNING] = "running",
1858 [SERVICE_RELOAD] = "reload",
1859 [SERVICE_STOP] = "stop",
1860 [SERVICE_STOP_SIGTERM] = "stop-sigterm",
1861 [SERVICE_STOP_SIGKILL] = "stop-sigkill",
1862 [SERVICE_STOP_POST] = "stop-post",
1863 [SERVICE_FINAL_SIGTERM] = "final-sigterm",
1864 [SERVICE_FINAL_SIGKILL] = "final-sigkill",
1865 [SERVICE_MAINTAINANCE] = "maintainance",
1866 [SERVICE_AUTO_RESTART] = "auto-restart",
1869 DEFINE_STRING_TABLE_LOOKUP(service_state, ServiceState);
1871 static const char* const service_restart_table[_SERVICE_RESTART_MAX] = {
1872 [SERVICE_ONCE] = "once",
1873 [SERVICE_RESTART_ON_SUCCESS] = "restart-on-success",
1874 [SERVICE_RESTART_ALWAYS] = "restart-on-failure",
1877 DEFINE_STRING_TABLE_LOOKUP(service_restart, ServiceRestart);
1879 static const char* const service_type_table[_SERVICE_TYPE_MAX] = {
1880 [SERVICE_FORKING] = "forking",
1881 [SERVICE_SIMPLE] = "simple",
1882 [SERVICE_FINISH] = "finish"
1885 DEFINE_STRING_TABLE_LOOKUP(service_type, ServiceType);
1887 static const char* const service_exec_command_table[_SERVICE_EXEC_MAX] = {
1888 [SERVICE_EXEC_START_PRE] = "ExecStartPre",
1889 [SERVICE_EXEC_START] = "ExecStart",
1890 [SERVICE_EXEC_START_POST] = "ExecStartPost",
1891 [SERVICE_EXEC_RELOAD] = "ExecReload",
1892 [SERVICE_EXEC_STOP] = "ExecStop",
1893 [SERVICE_EXEC_STOP_POST] = "ExecStopPost",
1896 DEFINE_STRING_TABLE_LOOKUP(service_exec_command, ServiceExecCommand);
1898 const UnitVTable service_vtable = {
1899 .suffix = ".service",
1901 .init = service_init,
1902 .done = service_done,
1904 .dump = service_dump,
1906 .start = service_start,
1907 .stop = service_stop,
1908 .reload = service_reload,
1910 .can_reload = service_can_reload,
1912 .active_state = service_active_state,
1914 .sigchld_event = service_sigchld_event,
1915 .timer_event = service_timer_event,
1917 .cgroup_notify_empty = service_cgroup_notify_event,
1919 .enumerate = service_enumerate