/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ /*** This file is part of systemd. Copyright 2013 Lennart Poettering systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <sys/mman.h> #include "special.h" #include "formats-util.h" #include "signal-util.h" #include "bus-kernel.h" #include "bus-internal.h" #include "bus-util.h" #include "kdbus.h" #include "bus-policy.h" #include "service.h" #include "dbus-busname.h" #include "busname.h" static const UnitActiveState state_translation_table[_BUSNAME_STATE_MAX] = { [BUSNAME_DEAD] = UNIT_INACTIVE, [BUSNAME_MAKING] = UNIT_ACTIVATING, [BUSNAME_REGISTERED] = UNIT_ACTIVE, [BUSNAME_LISTENING] = UNIT_ACTIVE, [BUSNAME_RUNNING] = UNIT_ACTIVE, [BUSNAME_SIGTERM] = UNIT_DEACTIVATING, [BUSNAME_SIGKILL] = UNIT_DEACTIVATING, [BUSNAME_FAILED] = UNIT_FAILED }; static int busname_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata); static int busname_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata); static void busname_init(Unit *u) { BusName *n = BUSNAME(u); assert(u); assert(u->load_state == UNIT_STUB); n->starter_fd = -1; n->accept_fd = true; n->activating = true; n->timeout_usec = u->manager->default_timeout_start_usec; } static void busname_unwatch_control_pid(BusName *n) { assert(n); if (n->control_pid <= 0) return; unit_unwatch_pid(UNIT(n), n->control_pid); n->control_pid = 0; } static void busname_free_policy(BusName *n) { BusNamePolicy *p; assert(n); while ((p = n->policy)) { LIST_REMOVE(policy, n->policy, p); free(p->name); free(p); } } static void busname_close_fd(BusName *n) { assert(n); n->starter_event_source = sd_event_source_unref(n->starter_event_source); n->starter_fd = safe_close(n->starter_fd); } static void busname_done(Unit *u) { BusName *n = BUSNAME(u); assert(n); free(n->name); n->name = NULL; busname_free_policy(n); busname_unwatch_control_pid(n); busname_close_fd(n); unit_ref_unset(&n->service); n->timer_event_source = sd_event_source_unref(n->timer_event_source); } static int busname_arm_timer(BusName *n) { int r; assert(n); if (n->timeout_usec <= 0) { n->timer_event_source = sd_event_source_unref(n->timer_event_source); return 0; } if (n->timer_event_source) { r = sd_event_source_set_time(n->timer_event_source, now(CLOCK_MONOTONIC) + n->timeout_usec); if (r < 0) return r; return sd_event_source_set_enabled(n->timer_event_source, SD_EVENT_ONESHOT); } r = sd_event_add_time( UNIT(n)->manager->event, &n->timer_event_source, CLOCK_MONOTONIC, now(CLOCK_MONOTONIC) + n->timeout_usec, 0, busname_dispatch_timer, n); if (r < 0) return r; (void) sd_event_source_set_description(n->timer_event_source, "busname-timer"); return 0; } static int busname_add_default_default_dependencies(BusName *n) { int r; assert(n); r = unit_add_dependency_by_name(UNIT(n), UNIT_BEFORE, SPECIAL_BUSNAMES_TARGET, NULL, true); if (r < 0) return r; if (UNIT(n)->manager->running_as == MANAGER_SYSTEM) { r = unit_add_two_dependencies_by_name(UNIT(n), UNIT_AFTER, UNIT_REQUIRES, SPECIAL_SYSINIT_TARGET, NULL, true); if (r < 0) return r; } return unit_add_two_dependencies_by_name(UNIT(n), UNIT_BEFORE, UNIT_CONFLICTS, SPECIAL_SHUTDOWN_TARGET, NULL, true); } static int busname_add_extras(BusName *n) { Unit *u = UNIT(n); int r; assert(n); if (!n->name) { r = unit_name_to_prefix(u->id, &n->name); if (r < 0) return r; } if (!u->description) { r = unit_set_description(u, n->name); if (r < 0) return r; } if (n->activating) { if (!UNIT_DEREF(n->service)) { Unit *x; r = unit_load_related_unit(u, ".service", &x); if (r < 0) return r; unit_ref_set(&n->service, x); } r = unit_add_two_dependencies(u, UNIT_BEFORE, UNIT_TRIGGERS, UNIT_DEREF(n->service), true); if (r < 0) return r; } if (u->default_dependencies) { r = busname_add_default_default_dependencies(n); if (r < 0) return r; } return 0; } static int busname_verify(BusName *n) { char *e; assert(n); if (UNIT(n)->load_state != UNIT_LOADED) return 0; if (!service_name_is_valid(n->name)) { log_unit_error(UNIT(n), "Name= setting is not a valid service name Refusing."); return -EINVAL; } e = strjoina(n->name, ".busname"); if (!unit_has_name(UNIT(n), e)) { log_unit_error(UNIT(n), "Name= setting doesn't match unit name. Refusing."); return -EINVAL; } return 0; } static int busname_load(Unit *u) { BusName *n = BUSNAME(u); int r; assert(u); assert(u->load_state == UNIT_STUB); r = unit_load_fragment_and_dropin(u); if (r < 0) return r; if (u->load_state == UNIT_LOADED) { /* This is a new unit? Then let's add in some extras */ r = busname_add_extras(n); if (r < 0) return r; } return busname_verify(n); } static void busname_dump(Unit *u, FILE *f, const char *prefix) { BusName *n = BUSNAME(u); assert(n); assert(f); fprintf(f, "%sBus Name State: %s\n" "%sResult: %s\n" "%sName: %s\n" "%sActivating: %s\n" "%sAccept FD: %s\n", prefix, busname_state_to_string(n->state), prefix, busname_result_to_string(n->result), prefix, n->name, prefix, yes_no(n->activating), prefix, yes_no(n->accept_fd)); if (n->control_pid > 0) fprintf(f, "%sControl PID: "PID_FMT"\n", prefix, n->control_pid); } static void busname_unwatch_fd(BusName *n) { int r; assert(n); if (!n->starter_event_source) return; r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_OFF); if (r < 0) log_unit_debug_errno(UNIT(n), r, "Failed to disable event source: %m"); } static int busname_watch_fd(BusName *n) { int r; assert(n); if (n->starter_fd < 0) return 0; if (n->starter_event_source) { r = sd_event_source_set_enabled(n->starter_event_source, SD_EVENT_ON); if (r < 0) goto fail; } else { r = sd_event_add_io(UNIT(n)->manager->event, &n->starter_event_source, n->starter_fd, EPOLLIN, busname_dispatch_io, n); if (r < 0) goto fail; (void) sd_event_source_set_description(n->starter_event_source, "busname-starter"); } return 0; fail: log_unit_warning_errno(UNIT(n), r, "Failed to watch starter fd: %m"); busname_unwatch_fd(n); return r; } static int busname_open_fd(BusName *n) { _cleanup_free_ char *path = NULL; const char *mode; assert(n); if (n->starter_fd >= 0) return 0; mode = UNIT(n)->manager->running_as == MANAGER_SYSTEM ? "system" : "user"; n->starter_fd = bus_kernel_open_bus_fd(mode, &path); if (n->starter_fd < 0) return log_unit_warning_errno(UNIT(n), n->starter_fd, "Failed to open %s: %m", path ?: "kdbus"); return 0; } static void busname_set_state(BusName *n, BusNameState state) { BusNameState old_state; assert(n); old_state = n->state; n->state = state; if (!IN_SET(state, BUSNAME_MAKING, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) { n->timer_event_source = sd_event_source_unref(n->timer_event_source); busname_unwatch_control_pid(n); } if (state != BUSNAME_LISTENING) busname_unwatch_fd(n); if (!IN_SET(state, BUSNAME_LISTENING, BUSNAME_MAKING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) busname_close_fd(n); if (state != old_state) log_unit_debug(UNIT(n), "Changed %s -> %s", busname_state_to_string(old_state), busname_state_to_string(state)); unit_notify(UNIT(n), state_translation_table[old_state], state_translation_table[state], true); } static int busname_coldplug(Unit *u) { BusName *n = BUSNAME(u); int r; assert(n); assert(n->state == BUSNAME_DEAD); if (n->deserialized_state == n->state) return 0; if (IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) { if (n->control_pid <= 0) return -EBADMSG; r = unit_watch_pid(UNIT(n), n->control_pid); if (r < 0) return r; r = busname_arm_timer(n); if (r < 0) return r; } if (IN_SET(n->deserialized_state, BUSNAME_MAKING, BUSNAME_LISTENING, BUSNAME_REGISTERED, BUSNAME_RUNNING)) { r = busname_open_fd(n); if (r < 0) return r; } if (n->deserialized_state == BUSNAME_LISTENING) { r = busname_watch_fd(n); if (r < 0) return r; } busname_set_state(n, n->deserialized_state); return 0; } static int busname_make_starter(BusName *n, pid_t *_pid) { pid_t pid; int r; r = busname_arm_timer(n); if (r < 0) goto fail; /* We have to resolve the user/group names out-of-process, * hence let's fork here. It's messy, but well, what can we * do? */ pid = fork(); if (pid < 0) return -errno; if (pid == 0) { int ret; (void) default_signals(SIGNALS_CRASH_HANDLER, SIGNALS_IGNORE, -1); (void) ignore_signals(SIGPIPE, -1); log_forget_fds(); r = bus_kernel_make_starter(n->starter_fd, n->name, n->activating, n->accept_fd, n->policy, n->policy_world); if (r < 0) { ret = EXIT_MAKE_STARTER; goto fail_child; } _exit(0); fail_child: log_open(); log_error_errno(r, "Failed to create starter connection at step %s: %m", exit_status_to_string(ret, EXIT_STATUS_SYSTEMD)); _exit(ret); } r = unit_watch_pid(UNIT(n), pid); if (r < 0) goto fail; *_pid = pid; return 0; fail: n->timer_event_source = sd_event_source_unref(n->timer_event_source); return r; } static void busname_enter_dead(BusName *n, BusNameResult f) { assert(n); if (f != BUSNAME_SUCCESS) n->result = f; busname_set_state(n, n->result != BUSNAME_SUCCESS ? BUSNAME_FAILED : BUSNAME_DEAD); } static void busname_enter_signal(BusName *n, BusNameState state, BusNameResult f) { KillContext kill_context = {}; int r; assert(n); if (f != BUSNAME_SUCCESS) n->result = f; kill_context_init(&kill_context); r = unit_kill_context(UNIT(n), &kill_context, state != BUSNAME_SIGTERM ? KILL_KILL : KILL_TERMINATE, -1, n->control_pid, false); if (r < 0) { log_unit_warning_errno(UNIT(n), r, "Failed to kill control process: %m"); goto fail; } if (r > 0) { r = busname_arm_timer(n); if (r < 0) { log_unit_warning_errno(UNIT(n), r, "Failed to arm timer: %m"); goto fail; } busname_set_state(n, state); } else if (state == BUSNAME_SIGTERM) busname_enter_signal(n, BUSNAME_SIGKILL, BUSNAME_SUCCESS); else busname_enter_dead(n, BUSNAME_SUCCESS); return; fail: busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); } static void busname_enter_listening(BusName *n) { int r; assert(n); if (n->activating) { r = busname_watch_fd(n); if (r < 0) { log_unit_warning_errno(UNIT(n), r, "Failed to watch names: %m"); goto fail; } busname_set_state(n, BUSNAME_LISTENING); } else busname_set_state(n, BUSNAME_REGISTERED); return; fail: busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_FAILURE_RESOURCES); } static void busname_enter_making(BusName *n) { int r; assert(n); r = busname_open_fd(n); if (r < 0) goto fail; if (n->policy) { /* If there is a policy, we need to resolve user/group * names, which we can't do from PID1, hence let's * fork. */ busname_unwatch_control_pid(n); r = busname_make_starter(n, &n->control_pid); if (r < 0) { log_unit_warning_errno(UNIT(n), r, "Failed to fork 'making' task: %m"); goto fail; } busname_set_state(n, BUSNAME_MAKING); } else { /* If there is no policy, we can do everything * directly from PID 1, hence do so. */ r = bus_kernel_make_starter(n->starter_fd, n->name, n->activating, n->accept_fd, NULL, n->policy_world); if (r < 0) { log_unit_warning_errno(UNIT(n), r, "Failed to make starter: %m"); goto fail; } busname_enter_listening(n); } return; fail: busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); } static void busname_enter_running(BusName *n) { _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; bool pending = false; Unit *other; Iterator i; int r; assert(n); if (!n->activating) return; /* We don't take connections anymore if we are supposed to * shut down anyway */ if (unit_stop_pending(UNIT(n))) { log_unit_debug(UNIT(n), "Suppressing activation request since unit stop is scheduled."); /* Flush all queued activation reqeuest by closing and reopening the connection */ bus_kernel_drop_one(n->starter_fd); busname_enter_listening(n); return; } /* If there's already a start pending don't bother to do * anything */ SET_FOREACH(other, UNIT(n)->dependencies[UNIT_TRIGGERS], i) if (unit_active_or_pending(other)) { pending = true; break; } if (!pending) { r = manager_add_job(UNIT(n)->manager, JOB_START, UNIT_DEREF(n->service), JOB_REPLACE, true, &error, NULL); if (r < 0) goto fail; } busname_set_state(n, BUSNAME_RUNNING); return; fail: log_unit_warning(UNIT(n), "Failed to queue service startup job: %s", bus_error_message(&error, r)); busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); } static int busname_start(Unit *u) { BusName *n = BUSNAME(u); assert(n); /* We cannot fulfill this request right now, try again later * please! */ if (IN_SET(n->state, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) return -EAGAIN; /* Already on it! */ if (n->state == BUSNAME_MAKING) return 0; if (n->activating && UNIT_ISSET(n->service)) { Service *service; service = SERVICE(UNIT_DEREF(n->service)); if (UNIT(service)->load_state != UNIT_LOADED) { log_unit_error(u, "Bus service %s not loaded, refusing.", UNIT(service)->id); return -ENOENT; } } assert(IN_SET(n->state, BUSNAME_DEAD, BUSNAME_FAILED)); n->result = BUSNAME_SUCCESS; busname_enter_making(n); return 1; } static int busname_stop(Unit *u) { BusName *n = BUSNAME(u); assert(n); /* Already on it */ if (IN_SET(n->state, BUSNAME_SIGTERM, BUSNAME_SIGKILL)) return 0; /* If there's already something running, we go directly into * kill mode. */ if (n->state == BUSNAME_MAKING) { busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_SUCCESS); return -EAGAIN; } assert(IN_SET(n->state, BUSNAME_REGISTERED, BUSNAME_LISTENING, BUSNAME_RUNNING)); busname_enter_dead(n, BUSNAME_SUCCESS); return 1; } static int busname_serialize(Unit *u, FILE *f, FDSet *fds) { BusName *n = BUSNAME(u); assert(n); assert(f); assert(fds); unit_serialize_item(u, f, "state", busname_state_to_string(n->state)); unit_serialize_item(u, f, "result", busname_result_to_string(n->result)); if (n->control_pid > 0) unit_serialize_item_format(u, f, "control-pid", PID_FMT, n->control_pid); if (n->starter_fd >= 0) { int copy; copy = fdset_put_dup(fds, n->starter_fd); if (copy < 0) return copy; unit_serialize_item_format(u, f, "starter-fd", "%i", copy); } return 0; } static int busname_deserialize_item(Unit *u, const char *key, const char *value, FDSet *fds) { BusName *n = BUSNAME(u); assert(n); assert(key); assert(value); if (streq(key, "state")) { BusNameState state; state = busname_state_from_string(value); if (state < 0) log_unit_debug(u, "Failed to parse state value: %s", value); else n->deserialized_state = state; } else if (streq(key, "result")) { BusNameResult f; f = busname_result_from_string(value); if (f < 0) log_unit_debug(u, "Failed to parse result value: %s", value); else if (f != BUSNAME_SUCCESS) n->result = f; } else if (streq(key, "control-pid")) { pid_t pid; if (parse_pid(value, &pid) < 0) log_unit_debug(u, "Failed to parse control-pid value: %s", value); else n->control_pid = pid; } else if (streq(key, "starter-fd")) { int fd; if (safe_atoi(value, &fd) < 0 || fd < 0 || !fdset_contains(fds, fd)) log_unit_debug(u, "Failed to parse starter fd value: %s", value); else { safe_close(n->starter_fd); n->starter_fd = fdset_remove(fds, fd); } } else log_unit_debug(u, "Unknown serialization key: %s", key); return 0; } _pure_ static UnitActiveState busname_active_state(Unit *u) { assert(u); return state_translation_table[BUSNAME(u)->state]; } _pure_ static const char *busname_sub_state_to_string(Unit *u) { assert(u); return busname_state_to_string(BUSNAME(u)->state); } static int busname_peek_message(BusName *n) { struct kdbus_cmd_recv cmd_recv = { .size = sizeof(cmd_recv), .flags = KDBUS_RECV_PEEK, }; struct kdbus_cmd_free cmd_free = { .size = sizeof(cmd_free), }; const char *comm = NULL; struct kdbus_item *d; struct kdbus_msg *k; size_t start, ps, sz, delta; void *p = NULL; pid_t pid = 0; int r; /* Generate a friendly debug log message about which process * caused triggering of this bus name. This simply peeks the * metadata of the first queued message and logs it. */ assert(n); /* Let's shortcut things a bit, if debug logging is turned off * anyway. */ if (log_get_max_level() < LOG_DEBUG) return 0; r = ioctl(n->starter_fd, KDBUS_CMD_RECV, &cmd_recv); if (r < 0) { if (errno == EINTR || errno == EAGAIN) return 0; return log_unit_error_errno(UNIT(n), errno, "Failed to query activation message: %m"); } /* We map as late as possible, and unmap imemdiately after * use. On 32bit address space is scarce and we want to be * able to handle a lot of activator connections at the same * time, and hence shouldn't keep the mmap()s around for * longer than necessary. */ ps = page_size(); start = (cmd_recv.msg.offset / ps) * ps; delta = cmd_recv.msg.offset - start; sz = PAGE_ALIGN(delta + cmd_recv.msg.msg_size); p = mmap(NULL, sz, PROT_READ, MAP_SHARED, n->starter_fd, start); if (p == MAP_FAILED) { r = log_unit_error_errno(UNIT(n), errno, "Failed to map activation message: %m"); goto finish; } k = (struct kdbus_msg *) ((uint8_t *) p + delta); KDBUS_ITEM_FOREACH(d, k, items) { switch (d->type) { case KDBUS_ITEM_PIDS: pid = d->pids.pid; break; case KDBUS_ITEM_PID_COMM: comm = d->str; break; } } if (pid > 0) log_unit_debug(UNIT(n), "Activation triggered by process " PID_FMT " (%s)", pid, strna(comm)); r = 0; finish: if (p) (void) munmap(p, sz); cmd_free.offset = cmd_recv.msg.offset; if (ioctl(n->starter_fd, KDBUS_CMD_FREE, &cmd_free) < 0) log_unit_warning(UNIT(n), "Failed to free peeked message, ignoring: %m"); return r; } static int busname_dispatch_io(sd_event_source *source, int fd, uint32_t revents, void *userdata) { BusName *n = userdata; assert(n); assert(fd >= 0); if (n->state != BUSNAME_LISTENING) return 0; log_unit_debug(UNIT(n), "Activation request"); if (revents != EPOLLIN) { log_unit_error(UNIT(n), "Got unexpected poll event (0x%x) on starter fd.", revents); goto fail; } busname_peek_message(n); busname_enter_running(n); return 0; fail: busname_enter_dead(n, BUSNAME_FAILURE_RESOURCES); return 0; } static void busname_sigchld_event(Unit *u, pid_t pid, int code, int status) { BusName *n = BUSNAME(u); BusNameResult f; assert(n); assert(pid >= 0); if (pid != n->control_pid) return; n->control_pid = 0; if (is_clean_exit(code, status, NULL)) f = BUSNAME_SUCCESS; else if (code == CLD_EXITED) f = BUSNAME_FAILURE_EXIT_CODE; else if (code == CLD_KILLED) f = BUSNAME_FAILURE_SIGNAL; else if (code == CLD_DUMPED) f = BUSNAME_FAILURE_CORE_DUMP; else assert_not_reached("Unknown sigchld code"); log_unit_full(u, f == BUSNAME_SUCCESS ? LOG_DEBUG : LOG_NOTICE, 0, "Control process exited, code=%s status=%i", sigchld_code_to_string(code), status); if (f != BUSNAME_SUCCESS) n->result = f; switch (n->state) { case BUSNAME_MAKING: if (f == BUSNAME_SUCCESS) busname_enter_listening(n); else busname_enter_signal(n, BUSNAME_SIGTERM, f); break; case BUSNAME_SIGTERM: case BUSNAME_SIGKILL: busname_enter_dead(n, f); break; default: assert_not_reached("Uh, control process died at wrong time."); } /* Notify clients about changed exit status */ unit_add_to_dbus_queue(u); } static int busname_dispatch_timer(sd_event_source *source, usec_t usec, void *userdata) { BusName *n = BUSNAME(userdata); assert(n); assert(n->timer_event_source == source); switch (n->state) { case BUSNAME_MAKING: log_unit_warning(UNIT(n), "Making timed out. Terminating."); busname_enter_signal(n, BUSNAME_SIGTERM, BUSNAME_FAILURE_TIMEOUT); break; case BUSNAME_SIGTERM: log_unit_warning(UNIT(n), "Stopping timed out. Killing."); busname_enter_signal(n, BUSNAME_SIGKILL, BUSNAME_FAILURE_TIMEOUT); break; case BUSNAME_SIGKILL: log_unit_warning(UNIT(n), "Processes still around after SIGKILL. Ignoring."); busname_enter_dead(n, BUSNAME_FAILURE_TIMEOUT); break; default: assert_not_reached("Timeout at wrong time."); } return 0; } static void busname_reset_failed(Unit *u) { BusName *n = BUSNAME(u); assert(n); if (n->state == BUSNAME_FAILED) busname_set_state(n, BUSNAME_DEAD); n->result = BUSNAME_SUCCESS; } static void busname_trigger_notify(Unit *u, Unit *other) { BusName *n = BUSNAME(u); Service *s; assert(n); assert(other); if (!IN_SET(n->state, BUSNAME_RUNNING, BUSNAME_LISTENING)) return; if (other->load_state != UNIT_LOADED || other->type != UNIT_SERVICE) return; s = SERVICE(other); if (s->state == SERVICE_FAILED && s->result == SERVICE_FAILURE_START_LIMIT) busname_enter_dead(n, BUSNAME_FAILURE_SERVICE_FAILED_PERMANENT); else if (IN_SET(s->state, SERVICE_DEAD, SERVICE_FAILED, SERVICE_STOP, SERVICE_STOP_SIGTERM, SERVICE_STOP_SIGKILL, SERVICE_STOP_POST, SERVICE_FINAL_SIGTERM, SERVICE_FINAL_SIGKILL, SERVICE_AUTO_RESTART)) busname_enter_listening(n); } static int busname_kill(Unit *u, KillWho who, int signo, sd_bus_error *error) { return unit_kill_common(u, who, signo, -1, BUSNAME(u)->control_pid, error); } static int busname_get_timeout(Unit *u, uint64_t *timeout) { BusName *n = BUSNAME(u); int r; if (!n->timer_event_source) return 0; r = sd_event_source_get_time(n->timer_event_source, timeout); if (r < 0) return r; return 1; } static bool busname_supported(void) { static int supported = -1; if (supported < 0) supported = is_kdbus_available(); return supported; } static const char* const busname_state_table[_BUSNAME_STATE_MAX] = { [BUSNAME_DEAD] = "dead", [BUSNAME_MAKING] = "making", [BUSNAME_REGISTERED] = "registered", [BUSNAME_LISTENING] = "listening", [BUSNAME_RUNNING] = "running", [BUSNAME_SIGTERM] = "sigterm", [BUSNAME_SIGKILL] = "sigkill", [BUSNAME_FAILED] = "failed", }; DEFINE_STRING_TABLE_LOOKUP(busname_state, BusNameState); static const char* const busname_result_table[_BUSNAME_RESULT_MAX] = { [BUSNAME_SUCCESS] = "success", [BUSNAME_FAILURE_RESOURCES] = "resources", [BUSNAME_FAILURE_TIMEOUT] = "timeout", [BUSNAME_FAILURE_EXIT_CODE] = "exit-code", [BUSNAME_FAILURE_SIGNAL] = "signal", [BUSNAME_FAILURE_CORE_DUMP] = "core-dump", [BUSNAME_FAILURE_SERVICE_FAILED_PERMANENT] = "service-failed-permanent", }; DEFINE_STRING_TABLE_LOOKUP(busname_result, BusNameResult); const UnitVTable busname_vtable = { .object_size = sizeof(BusName), .sections = "Unit\0" "BusName\0" "Install\0", .private_section = "BusName", .no_alias = true, .no_instances = true, .init = busname_init, .done = busname_done, .load = busname_load, .coldplug = busname_coldplug, .dump = busname_dump, .start = busname_start, .stop = busname_stop, .kill = busname_kill, .get_timeout = busname_get_timeout, .serialize = busname_serialize, .deserialize_item = busname_deserialize_item, .active_state = busname_active_state, .sub_state_to_string = busname_sub_state_to_string, .sigchld_event = busname_sigchld_event, .trigger_notify = busname_trigger_notify, .reset_failed = busname_reset_failed, .supported = busname_supported, .bus_interface = "org.freedesktop.systemd1.BusName", .bus_vtable = bus_busname_vtable, .status_message_formats = { .finished_start_job = { [JOB_DONE] = "Listening on %s.", [JOB_FAILED] = "Failed to listen on %s.", [JOB_DEPENDENCY] = "Dependency failed for %s.", [JOB_TIMEOUT] = "Timed out starting %s.", }, .finished_stop_job = { [JOB_DONE] = "Closed %s.", [JOB_FAILED] = "Failed stopping %s.", [JOB_TIMEOUT] = "Timed out stopping %s.", }, }, };