+static void socket_enter_dead(Socket *s, bool success) {
+ assert(s);
+
+ if (!success)
+ s->failure = true;
+
+ socket_set_state(s, s->failure ? SOCKET_MAINTAINANCE : SOCKET_DEAD);
+}
+
+static void socket_enter_stop_post(Socket *s, bool success) {
+ int r;
+ assert(s);
+
+ if (!success)
+ s->failure = true;
+
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_POST]))
+ if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_STOP_POST);
+
+ if (!s->control_command)
+ socket_enter_dead(s, true);
+
+ return;
+
+fail:
+ log_warning("%s failed to run stop-post executable: %s", unit_id(UNIT(s)), strerror(-r));
+ socket_enter_dead(s, false);
+}
+
+static void socket_enter_signal(Socket *s, SocketState state, bool success) {
+ int r;
+
+ assert(s);
+
+ if (!success)
+ s->failure = true;
+
+ if (s->control_pid > 0) {
+ int sig;
+
+ sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_POST_SIGTERM) ? SIGTERM : SIGKILL;
+
+ if (kill(s->control_pid, sig) < 0 && errno != ESRCH) {
+ r = -errno;
+ goto fail;
+ }
+ }
+
+ socket_set_state(s, state);
+
+ if (s->control_pid <= 0)
+ socket_enter_dead(s, true);
+
+ return;
+
+fail:
+ log_warning("%s failed to kill processes: %s", unit_id(UNIT(s)), strerror(-r));
+
+ if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
+ socket_enter_stop_post(s, false);
+ else
+ socket_enter_dead(s, false);
+}
+
+static void socket_enter_stop_pre(Socket *s, bool success) {
+ int r;
+ assert(s);
+
+ if (!success)
+ s->failure = true;
+
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE]))
+ if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_STOP_PRE);
+
+ if (!s->control_command)
+ socket_enter_stop_post(s, true);
+
+ return;
+
+fail:
+ log_warning("%s failed to run stop-pre executable: %s", unit_id(UNIT(s)), strerror(-r));
+ socket_enter_stop_post(s, false);
+}
+
+static void socket_enter_listening(Socket *s) {
+ int r;
+ assert(s);
+
+ if ((r = socket_watch_fds(s)) < 0) {
+ log_warning("%s failed to watch sockets: %s", unit_id(UNIT(s)), strerror(-r));
+ goto fail;
+ }
+
+ socket_set_state(s, SOCKET_LISTENING);
+ return;
+
+fail:
+ socket_enter_stop_pre(s, false);
+}
+
+static void socket_enter_start_post(Socket *s) {
+ int r;
+ assert(s);
+
+ if ((r = socket_open_fds(s)) < 0) {
+ log_warning("%s failed to listen on sockets: %s", unit_id(UNIT(s)), strerror(-r));
+ goto fail;
+ }
+
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST]))
+ if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0) {
+ log_warning("%s failed to run start-post executable: %s", unit_id(UNIT(s)), strerror(-r));
+ goto fail;
+ }
+
+ socket_set_state(s, SOCKET_START_POST);
+
+ if (!s->control_command)
+ socket_enter_listening(s);
+
+ return;
+
+fail:
+ socket_enter_stop_pre(s, false);
+}
+
+static void socket_enter_start_pre(Socket *s) {
+ int r;
+ assert(s);
+
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE]))
+ if ((r = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_START_PRE);
+
+ if (!s->control_command)
+ socket_enter_start_post(s);
+
+ return;
+
+fail:
+ log_warning("%s failed to run start-pre exectuable: %s", unit_id(UNIT(s)), strerror(-r));
+ socket_enter_dead(s, false);
+}
+
+static void socket_enter_running(Socket *s) {
+ int r;
+
+ assert(s);
+
+ if ((r = manager_add_job(UNIT(s)->meta.manager, JOB_START, UNIT(s->service), JOB_REPLACE, true, NULL)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_RUNNING);
+ return;
+
+fail:
+ log_warning("%s failed to queue socket startup job: %s", unit_id(UNIT(s)), strerror(-r));
+ socket_enter_dead(s, false);
+}
+
+static void socket_run_next(Socket *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 = socket_spawn(s, s->control_command, true, &s->control_pid)) < 0)
+ goto fail;
+
+ return;
+
+fail:
+ if (s->state == SOCKET_STOP_PRE)
+ socket_enter_stop_post(s, false);
+ else if (s->state == SOCKET_STOP_POST)
+ socket_enter_dead(s, false);
+ else
+ socket_enter_stop_pre(s, false);
+}
+
+static int socket_start(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(s);
+
+ /* We cannot fulfill this request right now, try again later
+ * please! */
+ if (s->state == SOCKET_STOP_PRE ||
+ s->state == SOCKET_STOP_PRE_SIGKILL ||
+ s->state == SOCKET_STOP_PRE_SIGTERM ||
+ s->state == SOCKET_STOP_POST ||
+ s->state == SOCKET_STOP_POST_SIGTERM ||
+ s->state == SOCKET_STOP_POST_SIGKILL)
+ return -EAGAIN;
+
+ if (s->state == SOCKET_START_PRE ||
+ s->state == SOCKET_START_POST)
+ return 0;
+
+ /* Cannot run this without the service being around */
+ if (s->service->meta.load_state != UNIT_LOADED)
+ return -ENOENT;
+
+ assert(s->state == SOCKET_DEAD || s->state == SOCKET_MAINTAINANCE);
+
+ s->failure = false;
+ socket_enter_start_pre(s);
+ return 0;
+}
+
+static int socket_stop(Unit *u) {
+ Socket *s = SOCKET(u);
+
+ assert(s);
+
+ /* We cannot fulfill this request right now, try again later
+ * please! */
+ if (s->state == SOCKET_START_PRE ||
+ s->state == SOCKET_START_POST)
+ return -EAGAIN;
+
+ assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
+
+ socket_enter_stop_pre(s, true);
+ return 0;
+}
+
+static UnitActiveState socket_active_state(Unit *u) {
+ assert(u);
+
+ return state_translation_table[SOCKET(u)->state];
+}
+
+static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
+ Socket *s = SOCKET(u);
+
+ assert(s);
+
+ log_debug("Incoming traffic on %s", unit_id(u));
+
+ if (events != POLLIN)
+ socket_enter_stop_pre(s, false);
+
+ socket_enter_running(s);
+}
+
+static void socket_sigchld_event(Unit *u, pid_t pid, int code, int status) {
+ Socket *s = SOCKET(u);
+ bool success;
+
+ assert(s);
+ assert(pid >= 0);
+
+ success = code == CLD_EXITED && status == 0;
+ s->failure = s->failure || !success;
+
+ assert(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 (s->control_command->command_next &&
+ (success || (s->state == SOCKET_EXEC_STOP_PRE || s->state == SOCKET_EXEC_STOP_POST))) {
+ log_debug("%s running next command for the state %s", unit_id(u), state_string_table[s->state]);
+ socket_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 SOCKET_START_PRE:
+ if (success)
+ socket_enter_start_post(s);
+ else
+ socket_enter_stop_pre(s, false);
+ break;
+
+ case SOCKET_START_POST:
+ if (success)
+ socket_enter_listening(s);
+ else
+ socket_enter_stop_pre(s, false);
+ break;
+
+ case SOCKET_STOP_PRE:
+ case SOCKET_STOP_PRE_SIGTERM:
+ case SOCKET_STOP_PRE_SIGKILL:
+ socket_enter_stop_post(s, success);
+ break;
+
+ case SOCKET_STOP_POST:
+ case SOCKET_STOP_POST_SIGTERM:
+ case SOCKET_STOP_POST_SIGKILL:
+ socket_enter_dead(s, success);
+ break;
+
+ default:
+ assert_not_reached("Uh, control process died at wrong time.");
+ }
+ }
+}
+
+static void socket_timer_event(Unit *u, uint64_t elapsed, Watch *w) {
+ Socket *s = SOCKET(u);
+
+ assert(s);
+ assert(elapsed == 1);
+
+ assert(w == &s->timer_watch);
+
+ switch (s->state) {
+
+ case SOCKET_START_PRE:
+ case SOCKET_START_POST:
+ log_warning("%s operation timed out. Stopping.", unit_id(u));
+ socket_enter_stop_pre(s, false);
+ break;
+
+ case SOCKET_STOP_PRE:
+ log_warning("%s stopping timed out. Terminating.", unit_id(u));
+ socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
+ break;
+
+ case SOCKET_STOP_PRE_SIGTERM:
+ log_warning("%s stopping timed out. Killing.", unit_id(u));
+ socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
+ break;
+
+ case SOCKET_STOP_PRE_SIGKILL:
+ log_warning("%s still around after SIGKILL. Ignoring.", unit_id(u));
+ socket_enter_stop_post(s, false);
+ break;
+
+ case SOCKET_STOP_POST:
+ log_warning("%s stopping timed out (2). Terminating.", unit_id(u));
+ socket_enter_signal(s, SOCKET_STOP_POST_SIGTERM, false);
+ break;
+
+ case SOCKET_STOP_POST_SIGTERM:
+ log_warning("%s stopping timed out (2). Killing.", unit_id(u));
+ socket_enter_signal(s, SOCKET_STOP_POST_SIGKILL, false);
+ break;
+
+ case SOCKET_STOP_POST_SIGKILL:
+ log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", unit_id(u));
+ socket_enter_dead(s, false);
+ break;
+
+ default:
+ assert_not_reached("Timeout at wrong time.");
+ }
+}
+
+int socket_collect_fds(Socket *s, int **fds, unsigned *n_fds) {
+ int *rfds;
+ unsigned rn_fds, k;