+static void socket_enter_signal(Socket *s, SocketState state, bool success) {
+ int r;
+ bool sent = false;
+
+ assert(s);
+
+ if (!success)
+ s->failure = true;
+
+ if (s->kill_mode != KILL_NONE) {
+ int sig = (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_FINAL_SIGTERM) ? SIGTERM : SIGKILL;
+
+ if (s->kill_mode == KILL_CONTROL_GROUP) {
+
+ if ((r = cgroup_bonding_kill_list(UNIT(s)->meta.cgroup_bondings, sig)) < 0) {
+ if (r != -EAGAIN && r != -ESRCH)
+ goto fail;
+ } else
+ sent = true;
+ }
+
+ if (!sent && s->control_pid > 0)
+ if (kill(s->kill_mode == KILL_PROCESS ? s->control_pid : -s->control_pid, sig) < 0 && errno != ESRCH) {
+ r = -errno;
+ goto fail;
+ }
+ }
+
+ if (sent && s->control_pid > 0) {
+ if ((r = unit_watch_timer(UNIT(s), s->timeout_usec, &s->timer_watch)) < 0)
+ goto fail;
+
+ socket_set_state(s, state);
+ } else if (state == SOCKET_STOP_PRE_SIGTERM || state == SOCKET_STOP_PRE_SIGKILL)
+ socket_enter_stop_post(s, true);
+ else
+ socket_enter_dead(s, true);
+
+ return;
+
+fail:
+ log_warning("%s failed to kill processes: %s", s->meta.id, 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;
+
+ socket_unwatch_control_pid(s);
+
+ s->control_command_id = SOCKET_EXEC_STOP_PRE;
+
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_STOP_PRE])) {
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_STOP_PRE);
+ } else
+ socket_enter_stop_post(s, true);
+
+ return;
+
+fail:
+ log_warning("%s failed to run stop-pre executable: %s", s->meta.id, 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", s->meta.id, 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", s->meta.id, strerror(-r));
+ goto fail;
+ }
+
+ socket_unwatch_control_pid(s);
+
+ s->control_command_id = SOCKET_EXEC_START_POST;
+
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_START_POST])) {
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0) {
+ log_warning("%s failed to run start-post executable: %s", s->meta.id, strerror(-r));
+ goto fail;
+ }
+
+ socket_set_state(s, SOCKET_START_POST);
+ } else
+ socket_enter_listening(s);
+
+ return;
+
+fail:
+ socket_enter_stop_pre(s, false);
+}
+
+static void socket_enter_start_pre(Socket *s) {
+ int r;
+ assert(s);
+
+ socket_unwatch_control_pid(s);
+
+ s->control_command_id = SOCKET_EXEC_START_PRE;
+
+ if ((s->control_command = s->exec_command[SOCKET_EXEC_START_PRE])) {
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
+ goto fail;
+
+ socket_set_state(s, SOCKET_START_PRE);
+ } else
+ socket_enter_start_post(s);
+
+ return;
+
+fail:
+ log_warning("%s failed to run start-pre exectuable: %s", s->meta.id, strerror(-r));
+ socket_enter_dead(s, false);
+}
+
+static void socket_enter_running(Socket *s, int cfd) {
+ int r;
+
+ assert(s);
+
+ if (cfd < 0) {
+ 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);
+ } else {
+ Unit *u;
+ char *prefix, *instance, *name;
+
+ if ((r = instance_from_socket(cfd, s->n_accepted++, &instance)))
+ goto fail;
+
+ if (!(prefix = unit_name_to_prefix(UNIT(s)->meta.id))) {
+ free(instance);
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ name = unit_name_build(prefix, instance, ".service");
+ free(prefix);
+ free(instance);
+
+ if (!name)
+ r = -ENOMEM;
+
+ r = manager_load_unit(UNIT(s)->meta.manager, name, NULL, &u);
+ free(name);
+
+ if (r < 0)
+ goto fail;
+
+ if ((r = service_set_socket_fd(SERVICE(u), cfd) < 0))
+ goto fail;
+
+ cfd = -1;
+
+ if ((r = manager_add_job(u->meta.manager, JOB_START, u, JOB_REPLACE, true, NULL)) < 0)
+ goto fail;
+ }
+
+ return;
+
+fail:
+ log_warning("%s failed to queue socket startup job: %s", s->meta.id, strerror(-r));
+ socket_enter_stop_pre(s, false);
+
+ if (cfd >= 0)
+ close_nointr_nofail(cfd);
+}
+
+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;
+
+ socket_unwatch_control_pid(s);
+
+ s->control_command = s->control_command->command_next;
+
+ if ((r = socket_spawn(s, s->control_command, &s->control_pid)) < 0)
+ goto fail;
+
+ return;
+
+fail:
+ log_warning("%s failed to run spawn next executable: %s", s->meta.id, strerror(-r));
+
+ if (s->state == SOCKET_START_POST)
+ socket_enter_stop_pre(s, false);
+ else if (s->state == SOCKET_STOP_POST)
+ socket_enter_dead(s, false);
+ else
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, 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_FINAL_SIGTERM ||
+ s->state == SOCKET_FINAL_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) {
+ if (s->service->meta.load_state != UNIT_LOADED)
+ return -ENOENT;
+
+ /* If the service is alredy actvie we cannot start the
+ * socket */
+ if (s->service->state != SERVICE_DEAD &&
+ s->service->state != SERVICE_MAINTAINANCE &&
+ s->service->state != SERVICE_AUTO_RESTART)
+ return -EBUSY;
+ }
+
+ 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;
+
+ /* Already on it */
+ if (s->state == SOCKET_STOP_PRE ||
+ s->state == SOCKET_STOP_PRE_SIGTERM ||
+ s->state == SOCKET_STOP_PRE_SIGKILL ||
+ s->state == SOCKET_STOP_POST ||
+ s->state == SOCKET_FINAL_SIGTERM ||
+ s->state == SOCKET_FINAL_SIGTERM)
+ return 0;
+
+ assert(s->state == SOCKET_LISTENING || s->state == SOCKET_RUNNING);
+
+ socket_enter_stop_pre(s, true);
+ return 0;
+}
+
+static int socket_serialize(Unit *u, FILE *f, FDSet *fds) {
+ Socket *s = SOCKET(u);
+ SocketPort *p;
+ int r;
+
+ assert(u);
+ assert(f);
+ assert(fds);
+
+ unit_serialize_item(u, f, "state", socket_state_to_string(s->state));
+ unit_serialize_item(u, f, "failure", yes_no(s->failure));
+ unit_serialize_item_format(u, f, "n-accepted", "%u", s->n_accepted);
+
+ if (s->control_pid > 0)
+ unit_serialize_item_format(u, f, "control-pid", "%u", (unsigned) s->control_pid);
+
+ if (s->control_command_id >= 0)
+ unit_serialize_item(u, f, "control-command", socket_exec_command_to_string(s->control_command_id));
+
+ LIST_FOREACH(port, p, s->ports) {
+ int copy;
+
+ if (p->fd < 0)
+ continue;
+
+ if ((copy = fdset_put_dup(fds, p->fd)) < 0)
+ return copy;
+
+ if (p->type == SOCKET_SOCKET) {
+ char *t;
+
+ if ((r = socket_address_print(&p->address, &t)) < 0)
+ return r;
+
+ unit_serialize_item_format(u, f, "socket", "%i %s", copy, t);
+ free(t);
+ } else {
+ assert(p->type == SOCKET_FIFO);
+ unit_serialize_item_format(u, f, "fifo", "%i %s", copy, p->path);
+ }
+ }
+
+ return 0;
+}
+
+static int socket_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) {
+ Socket *s = SOCKET(u);
+ int r;
+
+ assert(u);
+ assert(key);
+ assert(value);
+ assert(fds);
+
+ if (streq(key, "state")) {
+ SocketState state;
+
+ if ((state = socket_state_from_string(value)) < 0)
+ log_debug("Failed to parse state value %s", value);
+ else
+ s->deserialized_state = state;
+ } else if (streq(key, "failure")) {
+ int b;
+
+ if ((b = parse_boolean(value)) < 0)
+ log_debug("Failed to parse failure value %s", value);
+ else
+ s->failure = b || s->failure;
+
+ } else if (streq(key, "n-accepted")) {
+ unsigned k;
+
+ if ((r = safe_atou(value, &k)) < 0)
+ log_debug("Failed to parse n-accepted value %s", value);
+ else
+ s->n_accepted += k;
+ } else if (streq(key, "control-pid")) {
+ unsigned pid;
+
+ if ((r = safe_atou(value, &pid)) < 0 || pid <= 0)
+ log_debug("Failed to parse control-pid value %s", value);
+ else
+ s->control_pid = (pid_t) pid;
+ } else if (streq(key, "control-command")) {
+ SocketExecCommand id;
+
+ if ((id = socket_exec_command_from_string(value)) < 0)
+ log_debug("Failed to parse exec-command value %s", value);
+ else {
+ s->control_command_id = id;
+ s->control_command = s->exec_command[id];
+ }
+ } else if (streq(key, "fifo")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_debug("Failed to parse fifo value %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (streq(p->path, value+skip))
+ break;
+
+ if (p) {
+ if (p->fd >= 0)
+ close_nointr_nofail(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else if (streq(key, "socket")) {
+ int fd, skip = 0;
+ SocketPort *p;
+
+ if (sscanf(value, "%i %n", &fd, &skip) < 1 || fd < 0 || !fdset_contains(fds, fd))
+ log_debug("Failed to parse socket value %s", value);
+ else {
+
+ LIST_FOREACH(port, p, s->ports)
+ if (socket_address_is(&p->address, value+skip))
+ break;
+
+ if (p) {
+ if (p->fd >= 0)
+ close_nointr_nofail(p->fd);
+ p->fd = fdset_remove(fds, fd);
+ }
+ }
+
+ } else
+ log_debug("Unknown serialization key '%s'", key);
+
+ return 0;
+}
+
+static UnitActiveState socket_active_state(Unit *u) {
+ assert(u);
+
+ return state_translation_table[SOCKET(u)->state];
+}
+
+static const char *socket_sub_state_to_string(Unit *u) {
+ assert(u);
+
+ return socket_state_to_string(SOCKET(u)->state);
+}
+
+static void socket_fd_event(Unit *u, int fd, uint32_t events, Watch *w) {
+ Socket *s = SOCKET(u);
+ int cfd = -1;
+
+ assert(s);
+ assert(fd >= 0);
+
+ log_debug("Incoming traffic on %s", u->meta.id);
+
+ if (events != EPOLLIN) {
+ log_error("Got invalid poll event on socket.");
+ goto fail;
+ }
+
+ if (w->socket_accept) {
+ for (;;) {
+
+ if ((cfd = accept4(fd, NULL, NULL, SOCK_NONBLOCK)) < 0) {
+
+ if (errno == EINTR)
+ continue;
+
+ log_error("Failed to accept socket: %m");
+ goto fail;
+ }
+
+ break;
+ }
+ }
+
+ socket_enter_running(s, cfd);
+ return;
+
+fail:
+ socket_enter_stop_pre(s, false);
+}
+
+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 = is_clean_exit(code, status);
+ s->failure = s->failure || !success;
+
+ assert(s->control_pid == pid);
+ s->control_pid = 0;
+
+ if (s->control_command)
+ exec_status_fill(&s->control_command->exec_status, pid, code, status);
+
+ log_debug("%s control process exited, code=%s status=%i", u->meta.id, sigchld_code_to_string(code), status);
+
+ if (s->control_command && s->control_command->command_next && success) {
+ log_debug("%s running next command for state %s", u->meta.id, socket_state_to_string(s->state));
+ socket_run_next(s, success);
+ } else {
+ s->control_command = NULL;
+ s->control_command_id = _SOCKET_EXEC_COMMAND_INVALID;
+
+ /* No further commands for this step, so let's figure
+ * out what to do next */
+
+ log_debug("%s got final SIGCHLD for state %s", u->meta.id, socket_state_to_string(s->state));
+
+ switch (s->state) {
+
+ case SOCKET_START_PRE:
+ if (success)
+ socket_enter_start_post(s);
+ else
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, 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_FINAL_SIGTERM:
+ case SOCKET_FINAL_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:
+ log_warning("%s starting timed out. Terminating.", u->meta.id);
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
+
+ case SOCKET_START_POST:
+ log_warning("%s starting timed out. Stopping.", u->meta.id);
+ socket_enter_stop_pre(s, false);
+ break;
+
+ case SOCKET_STOP_PRE:
+ log_warning("%s stopping timed out. Terminating.", u->meta.id);
+ socket_enter_signal(s, SOCKET_STOP_PRE_SIGTERM, false);
+ break;
+
+ case SOCKET_STOP_PRE_SIGTERM:
+ log_warning("%s stopping timed out. Killing.", u->meta.id);
+ socket_enter_signal(s, SOCKET_STOP_PRE_SIGKILL, false);
+ break;
+
+ case SOCKET_STOP_PRE_SIGKILL:
+ log_warning("%s still around after SIGKILL. Ignoring.", u->meta.id);
+ socket_enter_stop_post(s, false);
+ break;
+
+ case SOCKET_STOP_POST:
+ log_warning("%s stopping timed out (2). Terminating.", u->meta.id);
+ socket_enter_signal(s, SOCKET_FINAL_SIGTERM, false);
+ break;
+
+ case SOCKET_FINAL_SIGTERM:
+ log_warning("%s stopping timed out (2). Killing.", u->meta.id);
+ socket_enter_signal(s, SOCKET_FINAL_SIGKILL, false);
+ break;
+
+ case SOCKET_FINAL_SIGKILL:
+ log_warning("%s still around after SIGKILL (2). Entering maintainance mode.", u->meta.id);
+ 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;
+ SocketPort *p;
+
+ assert(s);
+ assert(fds);
+ assert(n_fds);
+
+ /* Called from the service code for requesting our fds */
+
+ rn_fds = 0;
+ LIST_FOREACH(port, p, s->ports)
+ if (p->fd >= 0)
+ rn_fds++;
+
+ if (!(rfds = new(int, rn_fds)) < 0)
+ return -ENOMEM;
+
+ k = 0;
+ LIST_FOREACH(port, p, s->ports)
+ if (p->fd >= 0)
+ rfds[k++] = p->fd;
+
+ assert(k == rn_fds);
+
+ *fds = rfds;
+ *n_fds = rn_fds;
+
+ return 0;
+}
+
+void socket_notify_service_dead(Socket *s) {
+ assert(s);
+
+ /* The service is dead. Dang. */
+
+ if (s->state == SOCKET_RUNNING) {
+ log_debug("%s got notified about service death.", s->meta.id);
+ socket_enter_listening(s);
+ }
+}
+
+static const char* const socket_state_table[_SOCKET_STATE_MAX] = {
+ [SOCKET_DEAD] = "dead",
+ [SOCKET_START_PRE] = "start-pre",
+ [SOCKET_START_POST] = "start-post",
+ [SOCKET_LISTENING] = "listening",
+ [SOCKET_RUNNING] = "running",
+ [SOCKET_STOP_PRE] = "stop-pre",
+ [SOCKET_STOP_PRE_SIGTERM] = "stop-pre-sigterm",
+ [SOCKET_STOP_PRE_SIGKILL] = "stop-pre-sigkill",
+ [SOCKET_STOP_POST] = "stop-post",
+ [SOCKET_FINAL_SIGTERM] = "final-sigterm",
+ [SOCKET_FINAL_SIGKILL] = "final-sigkill",
+ [SOCKET_MAINTAINANCE] = "maintainance"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(socket_state, SocketState);
+
+static const char* const socket_exec_command_table[_SOCKET_EXEC_COMMAND_MAX] = {
+ [SOCKET_EXEC_START_PRE] = "StartPre",
+ [SOCKET_EXEC_START_POST] = "StartPost",
+ [SOCKET_EXEC_STOP_PRE] = "StopPre",
+ [SOCKET_EXEC_STOP_POST] = "StopPost"
+};
+
+DEFINE_STRING_TABLE_LOOKUP(socket_exec_command, SocketExecCommand);
+
+const UnitVTable socket_vtable = {