int bus_event_loop_with_idle(sd_event *e, sd_bus *bus, const char *name, usec_t timeout) {
bool exiting = false;
int r;
assert(e);
assert(bus);
assert(name);
for (;;) {
r = sd_event_get_state(e);
if (r < 0)
return r;
if (r == SD_EVENT_FINISHED)
break;
r = sd_event_run(e, exiting ? (uint64_t) -1 : timeout);
if (r < 0)
return r;
if (r == 0 && !exiting) {
r = bus_async_unregister_and_quit(e, bus, name);
if (r < 0)
return r;
exiting = true;
}
}
return 0;
}
int manager_run(Manager *m) {
int r;
assert(m);
for (;;) {
r = sd_event_get_state(m->event);
if (r < 0)
return r;
if (r == SD_EVENT_FINISHED)
return 0;
manager_gc(m, true);
r = sd_event_run(m->event, (uint64_t) -1);
if (r < 0)
return r;
}
return 0;
}
int bus_event_loop_with_idle(
sd_event *e,
sd_bus *bus,
const char *name,
usec_t timeout,
check_idle_t check_idle,
void *userdata) {
bool exiting = false;
int r, code;
assert(e);
assert(bus);
assert(name);
for (;;) {
bool idle;
r = sd_event_get_state(e);
if (r < 0)
return r;
if (r == SD_EVENT_FINISHED)
break;
if (check_idle)
idle = check_idle(userdata);
else
idle = true;
r = sd_event_run(e, exiting || !idle ? (uint64_t) -1 : timeout);
if (r < 0)
return r;
if (r == 0 && !exiting) {
r = sd_bus_try_close(bus);
if (r == -EBUSY)
continue;
/* Fallback for dbus1 connections: we
* unregister the name and wait for the
* response to come through for it */
if (r == -ENOTSUP) {
/* Inform the service manager that we
* are going down, so that it will
* queue all further start requests,
* instead of assuming we are already
* running. */
sd_notify(false, "STOPPING=1");
r = bus_async_unregister_and_exit(e, bus, name);
if (r < 0)
return r;
exiting = true;
continue;
}
if (r < 0)
return r;
sd_event_exit(e, 0);
break;
}
}
r = sd_event_get_exit_code(e, &code);
if (r < 0)
return r;
return code;
}
int main(int argc, char *argv[]) {
Server server;
int r;
if (argc > 1) {
log_error("This program does not take arguments.");
return EXIT_FAILURE;
}
log_set_target(LOG_TARGET_SAFE);
log_set_facility(LOG_SYSLOG);
log_parse_environment();
log_open();
umask(0022);
sigbus_install();
r = server_init(&server);
if (r < 0)
goto finish;
server_vacuum(&server, false);
server_flush_to_var(&server, true);
server_flush_dev_kmsg(&server);
log_debug("systemd-journald running as pid "PID_FMT, getpid_cached());
server_driver_message(&server, 0,
"MESSAGE_ID=" SD_MESSAGE_JOURNAL_START_STR,
LOG_MESSAGE("Journal started"),
NULL);
/* Make sure to send the usage message *after* flushing the
* journal so entries from the runtime journals are ordered
* before this message. See #4190 for some details. */
server_space_usage_message(&server, NULL);
for (;;) {
usec_t t = USEC_INFINITY, n;
r = sd_event_get_state(server.event);
if (r < 0)
goto finish;
if (r == SD_EVENT_FINISHED)
break;
n = now(CLOCK_REALTIME);
if (server.max_retention_usec > 0 && server.oldest_file_usec > 0) {
/* The retention time is reached, so let's vacuum! */
if (server.oldest_file_usec + server.max_retention_usec < n) {
log_info("Retention time reached.");
server_rotate(&server);
server_vacuum(&server, false);
continue;
}
/* Calculate when to rotate the next time */
t = server.oldest_file_usec + server.max_retention_usec - n;
}
#if HAVE_GCRYPT
if (server.system_journal) {
usec_t u;
if (journal_file_next_evolve_usec(server.system_journal, &u)) {
if (n >= u)
t = 0;
else
t = MIN(t, u - n);
}
}
#endif
r = sd_event_run(server.event, t);
if (r < 0) {
log_error_errno(r, "Failed to run event loop: %m");
goto finish;
}
server_maybe_append_tags(&server);
server_maybe_warn_forward_syslog_missed(&server);
}
log_debug("systemd-journald stopped as pid "PID_FMT, getpid_cached());
server_driver_message(&server, 0,
"MESSAGE_ID=" SD_MESSAGE_JOURNAL_STOP_STR,
LOG_MESSAGE("Journal stopped"),
NULL);
finish:
server_done(&server);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
