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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2011 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/epoll.h>
#include <sys/socket.h>
#include <errno.h>
#include <unistd.h>
#include <systemd/sd-journal.h>
#include <systemd/sd-messages.h>
#include <systemd/sd-daemon.h>
#include "journal-authenticate.h"
#include "journald-server.h"
#include "journald-kmsg.h"
#include "journald-syslog.h"
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;
}
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