1064 lines
32 KiB
C
1064 lines
32 KiB
C
/*-*- Mode: C; c-basic-offset: 8 -*-*/
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#include <errno.h>
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#include <signal.h>
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#include "unit.h"
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#include "service.h"
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#include "load-fragment.h"
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#include "load-dropin.h"
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#include "log.h"
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static const UnitActiveState state_translation_table[_SERVICE_STATE_MAX] = {
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[SERVICE_DEAD] = UNIT_INACTIVE,
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[SERVICE_START_PRE] = UNIT_ACTIVATING,
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[SERVICE_START] = UNIT_ACTIVATING,
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[SERVICE_START_POST] = UNIT_ACTIVATING,
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[SERVICE_RUNNING] = UNIT_ACTIVE,
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[SERVICE_RELOAD] = UNIT_ACTIVE_RELOADING,
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[SERVICE_STOP] = UNIT_DEACTIVATING,
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[SERVICE_STOP_SIGTERM] = UNIT_DEACTIVATING,
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[SERVICE_STOP_SIGKILL] = UNIT_DEACTIVATING,
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[SERVICE_STOP_POST] = UNIT_DEACTIVATING,
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[SERVICE_FINAL_SIGTERM] = UNIT_DEACTIVATING,
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[SERVICE_FINAL_SIGKILL] = UNIT_DEACTIVATING,
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[SERVICE_MAINTAINANCE] = UNIT_INACTIVE,
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[SERVICE_AUTO_RESTART] = UNIT_ACTIVATING,
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};
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static const char* const state_string_table[_SERVICE_STATE_MAX] = {
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[SERVICE_DEAD] = "dead",
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[SERVICE_START_PRE] = "start-pre",
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[SERVICE_START] = "start",
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[SERVICE_START_POST] = "start-post",
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[SERVICE_RUNNING] = "running",
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[SERVICE_RELOAD] = "reload",
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[SERVICE_STOP] = "stop",
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[SERVICE_STOP_SIGTERM] = "stop-sigterm",
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[SERVICE_STOP_SIGKILL] = "stop-sigkill",
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[SERVICE_STOP_POST] = "stop-post",
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[SERVICE_FINAL_SIGTERM] = "final-sigterm",
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[SERVICE_FINAL_SIGKILL] = "final-sigkill",
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[SERVICE_MAINTAINANCE] = "maintainance",
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[SERVICE_AUTO_RESTART] = "auto-restart",
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};
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static void service_done(Unit *u) {
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Service *s = SERVICE(u);
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assert(s);
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free(s->pid_file);
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s->pid_file = NULL;
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exec_context_done(&s->exec_context);
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exec_command_free_array(s->exec_command, _SERVICE_EXEC_MAX);
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s->control_command = NULL;
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/* This will leak a process, but at least no memory or any of
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* our resources */
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if (s->main_pid > 0) {
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unit_unwatch_pid(u, s->main_pid);
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s->main_pid = 0;
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}
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if (s->control_pid > 0) {
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unit_unwatch_pid(u, s->control_pid);
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s->control_pid = 0;
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}
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unit_unwatch_timer(u, &s->timer_watch);
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}
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static int service_load_sysv(Service *s) {
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assert(s);
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/* Load service data from SysV init scripts, preferably with
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* LSB headers ... */
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return -ENOENT;
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}
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static int service_init(Unit *u) {
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int r;
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Service *s = SERVICE(u);
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assert(s);
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/* First, reset everything to the defaults, in case this is a
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* reload */
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s->type = 0;
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s->restart = 0;
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s->timeout_usec = DEFAULT_TIMEOUT_USEC;
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s->restart_usec = DEFAULT_RESTART_USEC;
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exec_context_init(&s->exec_context);
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s->timer_watch.type = WATCH_INVALID;
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s->state = SERVICE_DEAD;
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RATELIMIT_INIT(s->ratelimit, 10*USEC_PER_SEC, 5);
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/* Load a .service file */
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if ((r = unit_load_fragment(u)) < 0) {
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service_done(u);
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return r;
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}
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/* Load a classic init script as a fallback, if we couldn*t find anything */
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if (r == 0)
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if ((r = service_load_sysv(s)) <= 0) {
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service_done(u);
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return r < 0 ? r : -ENOENT;
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}
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/* Load dropin directory data */
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if ((r = unit_load_dropin(u)) < 0) {
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service_done(u);
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return r;
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}
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return 0;
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}
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static void service_dump(Unit *u, FILE *f, const char *prefix) {
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static const char* const command_table[_SERVICE_EXEC_MAX] = {
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[SERVICE_EXEC_START_PRE] = "ExecStartPre",
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[SERVICE_EXEC_START] = "ExecStart",
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[SERVICE_EXEC_START_POST] = "ExecStartPost",
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[SERVICE_EXEC_RELOAD] = "ExecReload",
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[SERVICE_EXEC_STOP] = "ExecStop",
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[SERVICE_EXEC_STOP_POST] = "ExecStopPost",
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};
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ServiceExecCommand c;
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Service *s = SERVICE(u);
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char *prefix2;
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assert(s);
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prefix2 = strappend(prefix, "\t");
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if (!prefix2)
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prefix2 = "";
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fprintf(f,
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"%sService State: %s\n",
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prefix, state_string_table[s->state]);
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if (s->pid_file)
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fprintf(f,
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"%sPIDFile: %s\n",
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prefix, s->pid_file);
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exec_context_dump(&s->exec_context, f, prefix);
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for (c = 0; c < _SERVICE_EXEC_MAX; c++) {
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if (!s->exec_command[c])
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continue;
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fprintf(f, "%s→ %s:\n",
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prefix, command_table[c]);
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exec_command_dump_list(s->exec_command[c], f, prefix2);
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}
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free(prefix2);
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}
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static int service_load_pid_file(Service *s) {
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char *k;
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unsigned long p;
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int r;
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assert(s);
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if (s->main_pid_known)
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return 0;
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if (!s->pid_file)
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return -ENOENT;
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if ((r = read_one_line_file(s->pid_file, &k)) < 0)
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return r;
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if ((r = safe_atolu(k, &p)) < 0) {
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free(k);
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return r;
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}
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if ((unsigned long) (pid_t) p != p)
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return -ERANGE;
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s->main_pid = p;
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s->main_pid_known = true;
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return 0;
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}
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static int service_get_sockets(Service *s, Set **_set) {
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Set *set;
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Iterator i;
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char *t;
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int r;
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assert(s);
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assert(_set);
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/* Collects all Socket objects that belong to this
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* service. Note that a service might have multiple sockets
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* via multiple names. */
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if (!(set = set_new(NULL, NULL)))
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return -ENOMEM;
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SET_FOREACH(t, UNIT(s)->meta.names, i) {
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char *k;
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Unit *p;
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/* Look for all socket objects that go by any of our
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* units and collect their fds */
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if (!(k = unit_name_change_suffix(t, ".socket"))) {
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r = -ENOMEM;
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goto fail;
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}
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p = manager_get_unit(UNIT(s)->meta.manager, k);
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free(k);
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if (!p) continue;
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if ((r = set_put(set, p)) < 0)
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goto fail;
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}
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*_set = set;
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return 0;
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fail:
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set_free(set);
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return r;
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}
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static int service_notify_sockets(Service *s) {
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Iterator i;
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Set *set;
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Socket *socket;
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int r;
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assert(s);
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/* Notifies all our sockets when we die */
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if ((r = service_get_sockets(s, &set)) < 0)
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return r;
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SET_FOREACH(socket, set, i)
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socket_notify_service_dead(socket);
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set_free(set);
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return 0;
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}
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static void service_set_state(Service *s, ServiceState state) {
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ServiceState old_state;
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assert(s);
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old_state = s->state;
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s->state = state;
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if (state != SERVICE_START_PRE &&
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state != SERVICE_START &&
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state != SERVICE_START_POST &&
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state != SERVICE_RELOAD &&
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state != SERVICE_STOP &&
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state != SERVICE_STOP_SIGTERM &&
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state != SERVICE_STOP_SIGKILL &&
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state != SERVICE_STOP_POST &&
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state != SERVICE_FINAL_SIGTERM &&
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state != SERVICE_FINAL_SIGKILL &&
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state != SERVICE_AUTO_RESTART)
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unit_unwatch_timer(UNIT(s), &s->timer_watch);
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if (state != SERVICE_START_POST &&
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state != SERVICE_RUNNING &&
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state != SERVICE_RELOAD &&
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state != SERVICE_STOP &&
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state != SERVICE_STOP_SIGTERM &&
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state != SERVICE_STOP_SIGKILL)
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if (s->main_pid > 0) {
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unit_unwatch_pid(UNIT(s), s->main_pid);
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s->main_pid = 0;
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}
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if (state != SERVICE_START_PRE &&
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state != SERVICE_START &&
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state != SERVICE_START_POST &&
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state != SERVICE_RELOAD &&
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state != SERVICE_STOP &&
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state != SERVICE_STOP_SIGTERM &&
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state != SERVICE_STOP_SIGKILL &&
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state != SERVICE_STOP_POST &&
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state != SERVICE_FINAL_SIGTERM &&
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state != SERVICE_FINAL_SIGKILL)
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if (s->control_pid > 0) {
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unit_unwatch_pid(UNIT(s), s->control_pid);
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s->control_pid = 0;
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}
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if (state != SERVICE_START_PRE &&
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state != SERVICE_START &&
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state != SERVICE_START_POST &&
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state != SERVICE_RELOAD &&
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state != SERVICE_STOP &&
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state != SERVICE_STOP_POST)
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s->control_command = NULL;
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if (state == SERVICE_DEAD ||
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state == SERVICE_STOP ||
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state == SERVICE_STOP_SIGTERM ||
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state == SERVICE_STOP_SIGKILL ||
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state == SERVICE_STOP_POST ||
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state == SERVICE_FINAL_SIGTERM ||
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state == SERVICE_FINAL_SIGKILL ||
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state == SERVICE_MAINTAINANCE ||
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state == SERVICE_AUTO_RESTART)
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service_notify_sockets(s);
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log_debug("%s changed %s → %s", unit_id(UNIT(s)), state_string_table[old_state], state_string_table[state]);
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unit_notify(UNIT(s), state_translation_table[old_state], state_translation_table[state]);
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}
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static int service_collect_fds(Service *s, int **fds, unsigned *n_fds) {
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Iterator i;
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int r;
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int *rfds = NULL;
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unsigned rn_fds = 0;
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Set *set;
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Socket *socket;
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assert(s);
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assert(fds);
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assert(n_fds);
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if ((r = service_get_sockets(s, &set)) < 0)
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return r;
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SET_FOREACH(socket, set, i) {
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int *cfds;
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unsigned cn_fds;
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if ((r = socket_collect_fds(socket, &cfds, &cn_fds)) < 0)
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goto fail;
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if (!cfds)
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continue;
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if (!rfds) {
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rfds = cfds;
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rn_fds = cn_fds;
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} else {
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int *t;
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if (!(t = new(int, rn_fds+cn_fds))) {
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free(cfds);
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r = -ENOMEM;
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goto fail;
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}
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memcpy(t, rfds, rn_fds);
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memcpy(t+rn_fds, cfds, cn_fds);
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free(rfds);
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free(cfds);
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rfds = t;
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rn_fds = rn_fds+cn_fds;
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}
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}
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*fds = rfds;
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*n_fds = rn_fds;
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set_free(set);
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return 0;
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fail:
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set_free(set);
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free(rfds);
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return r;
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}
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static int service_spawn(Service *s, ExecCommand *c, bool timeout, bool pass_fds, pid_t *_pid) {
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pid_t pid;
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int r;
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int *fds = NULL;
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unsigned n_fds = 0;
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assert(s);
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assert(c);
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assert(_pid);
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if (pass_fds)
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if ((r = service_collect_fds(s, &fds, &n_fds)) < 0)
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goto fail;
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if (timeout) {
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if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
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goto fail;
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} else
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unit_unwatch_timer(UNIT(s), &s->timer_watch);
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if ((r = exec_spawn(c, &s->exec_context, fds, n_fds, &pid)) < 0)
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goto fail;
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if ((r = unit_watch_pid(UNIT(s), pid)) < 0)
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/* FIXME: we need to do something here */
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goto fail;
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free(fds);
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*_pid = pid;
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return 0;
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fail:
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free(fds);
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if (timeout)
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unit_unwatch_timer(UNIT(s), &s->timer_watch);
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return r;
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}
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static void service_enter_dead(Service *s, bool success, bool allow_restart) {
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int r;
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assert(s);
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if (!success)
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s->failure = true;
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if (allow_restart &&
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(s->restart == SERVICE_RESTART_ALWAYS ||
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(s->restart == SERVICE_RESTART_ON_SUCCESS && !s->failure))) {
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if ((r = unit_watch_timer(UNIT(s), s->restart_usec, &s->timer_watch)) < 0)
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goto fail;
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service_set_state(s, SERVICE_AUTO_RESTART);
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} else
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service_set_state(s, s->failure ? SERVICE_MAINTAINANCE : SERVICE_DEAD);
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return;
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|
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fail:
|
|
log_warning("%s failed to run install restart timer: %s", unit_id(UNIT(s)), strerror(-r));
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service_enter_dead(s, false, false);
|
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}
|
|
|
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static void service_enter_signal(Service *s, ServiceState state, bool success);
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|
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static void service_enter_stop_post(Service *s, bool success) {
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int r;
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assert(s);
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|
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if (!success)
|
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s->failure = true;
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|
|
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if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP_POST]))
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if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0)
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goto fail;
|
|
|
|
|
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service_set_state(s, SERVICE_STOP_POST);
|
|
|
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if (!s->control_command)
|
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service_enter_dead(s, true, true);
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|
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return;
|
|
|
|
fail:
|
|
log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
|
|
service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
|
|
}
|
|
|
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static void service_enter_signal(Service *s, ServiceState state, bool success) {
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int r;
|
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bool sent = false;
|
|
|
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assert(s);
|
|
|
|
if (!success)
|
|
s->failure = true;
|
|
|
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if (s->main_pid > 0 || s->control_pid > 0) {
|
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int sig;
|
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|
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sig = (state == SERVICE_STOP_SIGTERM || state == SERVICE_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
|
|
|
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r = 0;
|
|
if (s->main_pid > 0) {
|
|
if (kill(s->main_pid, sig) < 0 && errno != ESRCH)
|
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r = -errno;
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else
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sent = true;
|
|
}
|
|
|
|
if (s->control_pid > 0) {
|
|
if (kill(s->control_pid, sig) < 0 && errno != ESRCH)
|
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r = -errno;
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else
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sent = true;
|
|
}
|
|
|
|
if (r < 0)
|
|
goto fail;
|
|
}
|
|
|
|
service_set_state(s, state);
|
|
|
|
if (s->main_pid <= 0 && s->control_pid <= 0)
|
|
service_enter_dead(s, true, true);
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|
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return;
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|
|
fail:
|
|
log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
|
|
|
|
if (sent) {
|
|
s->failure = true;
|
|
service_set_state(s, state);
|
|
} else if (state == SERVICE_STOP_SIGTERM || state == SERVICE_STOP_SIGKILL)
|
|
service_enter_stop_post(s, false);
|
|
else
|
|
service_enter_dead(s, false, true);
|
|
}
|
|
|
|
static void service_enter_stop(Service *s, bool success) {
|
|
int r;
|
|
assert(s);
|
|
|
|
if (!success)
|
|
s->failure = true;
|
|
|
|
if ((s->control_command = s->exec_command[SERVICE_EXEC_STOP]))
|
|
if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0)
|
|
goto fail;
|
|
|
|
service_set_state(s, SERVICE_STOP);
|
|
|
|
if (!s->control_command)
|
|
service_enter_signal(s, SERVICE_STOP_SIGTERM, true);
|
|
|
|
return;
|
|
|
|
fail:
|
|
log_warning("%s failed to run stop executable: %s", unit_id(UNIT(s)), strerror(-r));
|
|
service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
|
|
}
|
|
|
|
static void service_enter_start_post(Service *s) {
|
|
int r;
|
|
assert(s);
|
|
|
|
if ((s->control_command = s->exec_command[SERVICE_EXEC_START_POST]))
|
|
if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0)
|
|
goto fail;
|
|
|
|
|
|
service_set_state(s, SERVICE_START_POST);
|
|
|
|
if (!s->control_command)
|
|
service_set_state(s, SERVICE_RUNNING);
|
|
|
|
return;
|
|
|
|
fail:
|
|
log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
|
|
service_enter_stop(s, false);
|
|
}
|
|
|
|
static void service_enter_start(Service *s) {
|
|
pid_t pid;
|
|
int r;
|
|
|
|
assert(s);
|
|
|
|
assert(s->exec_command[SERVICE_EXEC_START]);
|
|
assert(!s->exec_command[SERVICE_EXEC_START]->command_next);
|
|
|
|
if ((r = service_spawn(s, s->exec_command[SERVICE_EXEC_START], s->type == SERVICE_FORKING, true, &pid)) < 0)
|
|
goto fail;
|
|
|
|
service_set_state(s, SERVICE_START);
|
|
|
|
if (s->type == SERVICE_SIMPLE) {
|
|
/* For simple services we immediately start
|
|
* the START_POST binaries. */
|
|
|
|
s->main_pid = pid;
|
|
s->main_pid_known = true;
|
|
service_enter_start_post(s);
|
|
|
|
} else if (s->type == SERVICE_FORKING) {
|
|
|
|
/* For forking services we wait until the start
|
|
* process exited. */
|
|
|
|
s->control_pid = pid;
|
|
s->control_command = s->exec_command[SERVICE_EXEC_START];
|
|
} else
|
|
assert_not_reached("Unknown service type");
|
|
|
|
return;
|
|
|
|
fail:
|
|
log_warning("%s failed to run start exectuable: %s", unit_id(UNIT(s)), strerror(-r));
|
|
service_enter_stop(s, false);
|
|
}
|
|
|
|
static void service_enter_start_pre(Service *s) {
|
|
int r;
|
|
|
|
assert(s);
|
|
|
|
if ((s->control_command = s->exec_command[SERVICE_EXEC_START_PRE]))
|
|
if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0)
|
|
goto fail;
|
|
|
|
service_set_state(s, SERVICE_START_PRE);
|
|
|
|
if (!s->control_command)
|
|
service_enter_start(s);
|
|
|
|
return;
|
|
|
|
fail:
|
|
log_warning("%s failed to run start-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
|
|
service_enter_dead(s, false, true);
|
|
}
|
|
|
|
static void service_enter_restart(Service *s) {
|
|
int r;
|
|
assert(s);
|
|
|
|
if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s), JOB_FAIL, false, NULL)) < 0)
|
|
goto fail;
|
|
|
|
log_debug("%s scheduled restart job.", unit_id(UNIT(s)));
|
|
service_enter_dead(s, true, false);
|
|
return;
|
|
|
|
fail:
|
|
|
|
log_warning("%s failed to schedule restart job: %s", unit_id(UNIT(s)), strerror(-r));
|
|
service_enter_dead(s, false, false);
|
|
}
|
|
|
|
static void service_enter_reload(Service *s) {
|
|
int r;
|
|
|
|
assert(s);
|
|
|
|
if ((s->control_command = s->exec_command[SERVICE_EXEC_RELOAD]))
|
|
if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0)
|
|
goto fail;
|
|
|
|
service_set_state(s, SERVICE_RELOAD);
|
|
|
|
if (!s->control_command)
|
|
service_set_state(s, SERVICE_RUNNING);
|
|
|
|
return;
|
|
|
|
fail:
|
|
log_warning("%s failed to run reload executable: %s", unit_id(UNIT(s)), strerror(-r));
|
|
service_enter_stop(s, false);
|
|
}
|
|
|
|
static void service_run_next(Service *s, bool success) {
|
|
int r;
|
|
|
|
assert(s);
|
|
assert(s->control_command);
|
|
assert(s->control_command->command_next);
|
|
|
|
if (!success)
|
|
s->failure = true;
|
|
|
|
s->control_command = s->control_command->command_next;
|
|
|
|
if ((r = service_spawn(s, s->control_command, true, false, &s->control_pid)) < 0)
|
|
goto fail;
|
|
|
|
return;
|
|
|
|
fail:
|
|
log_warning("%s failed to run spawn next executable: %s", unit_id(UNIT(s)), strerror(-r));
|
|
|
|
if (s->state == SERVICE_STOP)
|
|
service_enter_stop_post(s, false);
|
|
else if (s->state == SERVICE_STOP_POST)
|
|
service_enter_dead(s, false, true);
|
|
else
|
|
service_enter_stop(s, false);
|
|
}
|
|
|
|
static int service_start(Unit *u) {
|
|
Service *s = SERVICE(u);
|
|
|
|
assert(s);
|
|
|
|
/* We cannot fulfill this request right now, try again later
|
|
* please! */
|
|
if (s->state == SERVICE_STOP ||
|
|
s->state == SERVICE_STOP_SIGTERM ||
|
|
s->state == SERVICE_STOP_SIGKILL ||
|
|
s->state == SERVICE_STOP_POST ||
|
|
s->state == SERVICE_FINAL_SIGTERM ||
|
|
s->state == SERVICE_FINAL_SIGKILL)
|
|
return -EAGAIN;
|
|
|
|
/* Already on it! */
|
|
if (s->state == SERVICE_START_PRE ||
|
|
s->state == SERVICE_START ||
|
|
s->state == SERVICE_START_POST)
|
|
return 0;
|
|
|
|
assert(s->state == SERVICE_DEAD || s->state == SERVICE_MAINTAINANCE || s->state == SERVICE_AUTO_RESTART);
|
|
|
|
/* Make sure we don't enter a busy loop of some kind. */
|
|
if (!ratelimit_test(&s->ratelimit)) {
|
|
log_warning("%s start request repeated too quickly, refusing to start.", unit_id(u));
|
|
return -EAGAIN;
|
|
}
|
|
|
|
s->failure = false;
|
|
s->main_pid_known = false;
|
|
|
|
service_enter_start_pre(s);
|
|
return 0;
|
|
}
|
|
|
|
static int service_stop(Unit *u) {
|
|
Service *s = SERVICE(u);
|
|
|
|
assert(s);
|
|
|
|
if (s->state == SERVICE_START_PRE ||
|
|
s->state == SERVICE_START ||
|
|
s->state == SERVICE_START_POST ||
|
|
s->state == SERVICE_RELOAD)
|
|
return -EAGAIN;
|
|
|
|
if (s->state == SERVICE_AUTO_RESTART) {
|
|
service_set_state(s, SERVICE_DEAD);
|
|
return 0;
|
|
}
|
|
|
|
assert(s->state == SERVICE_RUNNING);
|
|
|
|
service_enter_stop(s, true);
|
|
return 0;
|
|
}
|
|
|
|
static int service_reload(Unit *u) {
|
|
Service *s = SERVICE(u);
|
|
|
|
assert(s);
|
|
|
|
assert(s->state == SERVICE_RUNNING);
|
|
|
|
service_enter_reload(s);
|
|
return 0;
|
|
}
|
|
|
|
static bool service_can_reload(Unit *u) {
|
|
Service *s = SERVICE(u);
|
|
|
|
assert(s);
|
|
|
|
return !!s->exec_command[SERVICE_EXEC_RELOAD];
|
|
}
|
|
|
|
static UnitActiveState service_active_state(Unit *u) {
|
|
assert(u);
|
|
|
|
return state_translation_table[SERVICE(u)->state];
|
|
}
|
|
|
|
static int main_pid_good(Service *s) {
|
|
assert(s);
|
|
|
|
/* Returns 0 if the pid is dead, 1 if it is good, -1 if we
|
|
* don't know */
|
|
|
|
/* If we know the pid file, then lets just check if it is
|
|
* still valid */
|
|
if (s->main_pid_known)
|
|
return s->main_pid > 0;
|
|
|
|
/* We don't know the pid */
|
|
return -1;
|
|
}
|
|
|
|
static bool control_pid_good(Service *s) {
|
|
assert(s);
|
|
|
|
return s->control_pid > 0;
|
|
}
|
|
|
|
static void service_sigchld_event(Unit *u, pid_t pid, int code, int status) {
|
|
Service *s = SERVICE(u);
|
|
bool success;
|
|
|
|
assert(s);
|
|
assert(pid >= 0);
|
|
|
|
success = code == CLD_EXITED && status == 0;
|
|
s->failure = s->failure || !success;
|
|
|
|
if (s->main_pid == pid) {
|
|
|
|
exec_status_fill(&s->main_exec_status, pid, code, status);
|
|
s->main_pid = 0;
|
|
|
|
if (s->type == SERVICE_SIMPLE) {
|
|
assert(s->exec_command[SERVICE_EXEC_START]);
|
|
s->exec_command[SERVICE_EXEC_START]->exec_status = s->main_exec_status;
|
|
}
|
|
|
|
log_debug("%s: main process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status);
|
|
|
|
/* The service exited, so the service is officially
|
|
* gone. */
|
|
|
|
switch (s->state) {
|
|
|
|
case SERVICE_START_POST:
|
|
case SERVICE_RELOAD:
|
|
case SERVICE_STOP:
|
|
/* Need to wait until the operation is
|
|
* done */
|
|
break;
|
|
|
|
case SERVICE_RUNNING:
|
|
service_enter_stop(s, success);
|
|
break;
|
|
|
|
case SERVICE_STOP_SIGTERM:
|
|
case SERVICE_STOP_SIGKILL:
|
|
|
|
if (!control_pid_good(s))
|
|
service_enter_stop_post(s, success);
|
|
|
|
/* If there is still a control process, wait for that first */
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Uh, main process died at wrong time.");
|
|
}
|
|
|
|
} else if (s->control_pid == pid) {
|
|
assert(s->control_command);
|
|
|
|
exec_status_fill(&s->control_command->exec_status, pid, code, status);
|
|
s->control_pid = 0;
|
|
|
|
log_debug("%s: control process exited, code=%s status=%i", unit_id(u), sigchld_code(code), status);
|
|
|
|
/* If we are shutting things down anyway we
|
|
* don't care about failing commands. */
|
|
|
|
if (s->control_command->command_next &&
|
|
(success || (s->state == SERVICE_EXEC_STOP || s->state == SERVICE_EXEC_STOP_POST)))
|
|
|
|
/* There is another command to *
|
|
* execute, so let's do that. */
|
|
|
|
service_run_next(s, success);
|
|
|
|
else {
|
|
/* No further commands for this step, so let's
|
|
* figure out what to do next */
|
|
|
|
log_debug("%s got final SIGCHLD for state %s", unit_id(u), state_string_table[s->state]);
|
|
|
|
switch (s->state) {
|
|
|
|
case SERVICE_START_PRE:
|
|
if (success)
|
|
service_enter_start(s);
|
|
else
|
|
service_enter_stop(s, false);
|
|
break;
|
|
|
|
case SERVICE_START:
|
|
assert(s->type == SERVICE_FORKING);
|
|
|
|
/* Let's try to load the pid
|
|
* file here if we can. We
|
|
* ignore the return value,
|
|
* since the PID file might
|
|
* actually be created by a
|
|
* START_POST script */
|
|
|
|
if (success) {
|
|
if (s->pid_file)
|
|
service_load_pid_file(s);
|
|
|
|
service_enter_start_post(s);
|
|
} else
|
|
service_enter_stop(s, false);
|
|
|
|
break;
|
|
|
|
case SERVICE_START_POST:
|
|
if (success && s->pid_file && !s->main_pid_known) {
|
|
int r;
|
|
|
|
/* Hmm, let's see if we can
|
|
* load the pid now after the
|
|
* start-post scripts got
|
|
* executed. */
|
|
|
|
if ((r = service_load_pid_file(s)) < 0)
|
|
log_warning("%s: failed to load PID file %s: %s", unit_id(UNIT(s)), s->pid_file, strerror(-r));
|
|
}
|
|
|
|
/* Fall through */
|
|
|
|
case SERVICE_RELOAD:
|
|
if (success) {
|
|
if (main_pid_good(s) != 0)
|
|
service_set_state(s, SERVICE_RUNNING);
|
|
else
|
|
service_enter_stop(s, true);
|
|
} else
|
|
service_enter_stop(s, false);
|
|
|
|
break;
|
|
|
|
case SERVICE_STOP:
|
|
if (main_pid_good(s) > 0)
|
|
/* Still not dead and we know the PID? Let's go hunting. */
|
|
service_enter_signal(s, SERVICE_STOP_SIGTERM, success);
|
|
else
|
|
service_enter_stop_post(s, success);
|
|
break;
|
|
|
|
case SERVICE_STOP_SIGTERM:
|
|
case SERVICE_STOP_SIGKILL:
|
|
if (main_pid_good(s) <= 0)
|
|
service_enter_stop_post(s, success);
|
|
|
|
/* If there is still a service
|
|
* process around, wait until
|
|
* that one quit, too */
|
|
break;
|
|
|
|
case SERVICE_STOP_POST:
|
|
case SERVICE_FINAL_SIGTERM:
|
|
case SERVICE_FINAL_SIGKILL:
|
|
service_enter_dead(s, success, true);
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Uh, control process died at wrong time.");
|
|
}
|
|
}
|
|
} else
|
|
assert_not_reached("Got SIGCHLD for unkown PID");
|
|
}
|
|
|
|
static void service_timer_event(Unit *u, uint64_t elapsed, Watch* w) {
|
|
Service *s = SERVICE(u);
|
|
|
|
assert(s);
|
|
assert(elapsed == 1);
|
|
|
|
assert(w == &s->timer_watch);
|
|
|
|
switch (s->state) {
|
|
|
|
case SERVICE_START_PRE:
|
|
case SERVICE_START:
|
|
case SERVICE_START_POST:
|
|
case SERVICE_RELOAD:
|
|
log_warning("%s operation timed out. Stopping.", unit_id(u));
|
|
service_enter_stop(s, false);
|
|
break;
|
|
|
|
case SERVICE_STOP:
|
|
log_warning("%s stopping timed out. Terminating.", unit_id(u));
|
|
service_enter_signal(s, SERVICE_STOP_SIGTERM, false);
|
|
break;
|
|
|
|
case SERVICE_STOP_SIGTERM:
|
|
log_warning("%s stopping timed out. Killing.", unit_id(u));
|
|
service_enter_signal(s, SERVICE_STOP_SIGKILL, false);
|
|
break;
|
|
|
|
case SERVICE_STOP_SIGKILL:
|
|
/* Uh, wie sent a SIGKILL and it is still not gone?
|
|
* Must be something we cannot kill, so let's just be
|
|
* weirded out and continue */
|
|
|
|
log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
|
|
service_enter_stop_post(s, false);
|
|
break;
|
|
|
|
case SERVICE_STOP_POST:
|
|
log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
|
|
service_enter_signal(s, SERVICE_FINAL_SIGTERM, false);
|
|
break;
|
|
|
|
case SERVICE_FINAL_SIGTERM:
|
|
log_warning("%s stopping timed out (2). Killing.", unit_id(u));
|
|
service_enter_signal(s, SERVICE_FINAL_SIGKILL, false);
|
|
break;
|
|
|
|
case SERVICE_FINAL_SIGKILL:
|
|
log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
|
|
service_enter_dead(s, false, true);
|
|
break;
|
|
|
|
case SERVICE_AUTO_RESTART:
|
|
log_debug("%s holdoff time over, scheduling restart.", unit_id(u));
|
|
service_enter_restart(s);
|
|
break;
|
|
|
|
default:
|
|
assert_not_reached("Timeout at wrong time.");
|
|
}
|
|
}
|
|
|
|
const UnitVTable service_vtable = {
|
|
.suffix = ".service",
|
|
|
|
.init = service_init,
|
|
.done = service_done,
|
|
|
|
.dump = service_dump,
|
|
|
|
.start = service_start,
|
|
.stop = service_stop,
|
|
.reload = service_reload,
|
|
|
|
.can_reload = service_can_reload,
|
|
|
|
.active_state = service_active_state,
|
|
|
|
.sigchld_event = service_sigchld_event,
|
|
.timer_event = service_timer_event,
|
|
};
|