![Zbigniew Jędrzejewski-Szmek](/assets/img/avatar_default.png)
The code to format the iovec is shared with log.c. All call sites to server_driver_message are changed to include the additional "MESSAGE=" part, but the new functionality is not used and change in functionality is not expected. iovec is preallocated, so the maximum number of messages is limited. In server_driver_message N_IOVEC_PAYLOAD_FIELDS is currently set to 1. New code is not oom safe, it will fail if memory cannot be allocated. This will be fixed in subsequent commit.
123 lines
3.8 KiB
C
123 lines
3.8 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2011 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <unistd.h>
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#include "sd-daemon.h"
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#include "sd-messages.h"
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#include "formats-util.h"
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#include "journal-authenticate.h"
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#include "journald-kmsg.h"
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#include "journald-server.h"
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#include "journald-syslog.h"
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#include "sigbus.h"
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int main(int argc, char *argv[]) {
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Server server;
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int r;
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if (argc > 1) {
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log_error("This program does not take arguments.");
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return EXIT_FAILURE;
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}
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log_set_target(LOG_TARGET_SAFE);
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log_set_facility(LOG_SYSLOG);
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log_parse_environment();
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log_open();
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umask(0022);
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sigbus_install();
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r = server_init(&server);
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if (r < 0)
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goto finish;
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server_vacuum(&server, false, false);
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server_flush_to_var(&server);
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server_flush_dev_kmsg(&server);
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log_debug("systemd-journald running as pid "PID_FMT, getpid());
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server_driver_message(&server, SD_MESSAGE_JOURNAL_START,
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LOG_MESSAGE("Journal started"),
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NULL);
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for (;;) {
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usec_t t = USEC_INFINITY, n;
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r = sd_event_get_state(server.event);
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if (r < 0)
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goto finish;
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if (r == SD_EVENT_FINISHED)
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break;
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n = now(CLOCK_REALTIME);
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if (server.max_retention_usec > 0 && server.oldest_file_usec > 0) {
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/* The retention time is reached, so let's vacuum! */
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if (server.oldest_file_usec + server.max_retention_usec < n) {
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log_info("Retention time reached.");
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server_rotate(&server);
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server_vacuum(&server, false, false);
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continue;
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}
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/* Calculate when to rotate the next time */
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t = server.oldest_file_usec + server.max_retention_usec - n;
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}
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#ifdef HAVE_GCRYPT
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if (server.system_journal) {
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usec_t u;
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if (journal_file_next_evolve_usec(server.system_journal, &u)) {
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if (n >= u)
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t = 0;
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else
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t = MIN(t, u - n);
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}
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}
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#endif
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r = sd_event_run(server.event, t);
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if (r < 0) {
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log_error_errno(r, "Failed to run event loop: %m");
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goto finish;
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}
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server_maybe_append_tags(&server);
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server_maybe_warn_forward_syslog_missed(&server);
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}
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log_debug("systemd-journald stopped as pid "PID_FMT, getpid());
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server_driver_message(&server, SD_MESSAGE_JOURNAL_STOP,
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LOG_MESSAGE("Journal stopped"),
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NULL);
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finish:
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server_done(&server);
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return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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