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;
}
int main(int argc, char *argv[]) {
Server server;
int r;
/* if (getppid() != 1) { */
/* log_error("This program should be invoked by init only."); */
/* return EXIT_FAILURE; */
/* } */
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);
r = server_init(&server);
if (r < 0)
goto finish;
server_vacuum(&server);
server_flush_to_var(&server);
server_flush_dev_kmsg(&server);
log_debug("systemd-journald running as pid %lu", (unsigned long) getpid());
server_driver_message(&server, SD_MESSAGE_JOURNAL_START, "Journal started");
sd_notify(false,
"READY=1\n"
"STATUS=Processing requests...");
for (;;) {
struct epoll_event event;
int t = -1;
usec_t n;
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);
continue;
}
/* Calculate when to rotate the next time */
t = (int) ((server.oldest_file_usec + server.max_retention_usec - n + USEC_PER_MSEC - 1) / USEC_PER_MSEC);
log_info("Sleeping for %i ms", t);
}
#ifdef 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, (int) ((u - n + USEC_PER_MSEC - 1) / USEC_PER_MSEC));
}
}
#endif
r = epoll_wait(server.epoll_fd, &event, 1, t);
if (r < 0) {
if (errno == EINTR)
continue;
log_error("epoll_wait() failed: %m");
r = -errno;
goto finish;
}
if (r > 0) {
r = process_event(&server, &event);
if (r < 0)
goto finish;
else if (r == 0)
break;
}
server_maybe_append_tags(&server);
server_maybe_warn_forward_syslog_missed(&server);
}
log_debug("systemd-journald stopped as pid %lu", (unsigned long) getpid());
server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP, "Journal stopped");
finish:
sd_notify(false,
"STATUS=Shutting down...");
server_done(&server);
return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
