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/*
* (C) 2020 by Vadim Yanitskiy <axilirator@gmail.com>
* All Rights Reserved
*
* SPDX-License-Identifier: GPL-2.0+
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
*/
/*! \addtogroup logging
* @{
* \file logging_systemd.c */
#include <stdio.h>
#include <syslog.h>
/* Do not use this file as location in sd_journal_print() */
#define SD_JOURNAL_SUPPRESS_LOCATION
#include <systemd/sd-journal.h>
#include <osmocom/core/talloc.h>
#include <osmocom/core/utils.h>
#include <osmocom/core/logging.h>
/* FIXME: copy-pasted from logging_syslog.c */
static int logp2syslog_level(unsigned int level)
{
if (level >= LOGL_FATAL)
return LOG_CRIT;
else if (level >= LOGL_ERROR)
return LOG_ERR;
else if (level >= LOGL_NOTICE)
return LOG_NOTICE;
else if (level >= LOGL_INFO)
return LOG_INFO;
else
return LOG_DEBUG;
}
static void _systemd_output(struct log_target *target,
unsigned int level, const char *log)
{
/* systemd accepts the same level constants as syslog */
sd_journal_print(logp2syslog_level(level), "%s", log);
}
static void _systemd_raw_output(struct log_target *target, int subsys,
unsigned int level, const char *file,
int line, int cont, const char *format,
va_list ap)
{
char buf[4096];
int rc;
rc = vsnprintf(buf, sizeof(buf), format, ap);
if (rc < 0) {
sd_journal_print(LOG_ERR, "vsnprintf() failed to render a message "
"originated from %s:%d (rc=%d)\n",
file, line, rc);
return;
}
sd_journal_send("CODE_FILE=%s, CODE_LINE=%d", file, line,
"PRIORITY=%d", logp2syslog_level(level),
"OSMO_SUBSYS=%s", log_category_name(subsys),
"OSMO_SUBSYS_HEX=%4.4x", subsys,
"MESSAGE=%s", buf,
NULL);
}
/*! Create a new logging target for systemd journal logging.
* \param[in] raw whether to offload rendering of the meta information
* (location, category) to systemd-journal.
* \returns Log target in case of success, NULL in case of error.
*/
struct log_target *log_target_create_systemd(bool raw)
{
struct log_target *target;
target = log_target_create();
if (!target)
return NULL;
target->type = LOG_TGT_TYPE_SYSTEMD;
log_target_systemd_set_raw(target, raw);
return target;
}
/*! Change meta information handling of an existing logging target.
* \param[in] target logging target to be modified.
* \param[in] raw whether to offload rendering of the meta information
* (location, category) to systemd-journal.
*/
void log_target_systemd_set_raw(struct log_target *target, bool raw)
{
target->sd_journal.raw = raw;
if (raw) {
target->raw_output = _systemd_raw_output;
target->output = NULL;
} else {
target->output = _systemd_output;
target->raw_output = NULL;
}
}
/* @} */
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