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/*-
* Copyright (c) 2026, Mr. Goblin
*
* SPDX-License-Identifier: BSD-2-Clause
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
* THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
*/
#include <syslog.h>
#include <stdarg.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "logger.h"
static int use_syslog = 0;
void
logger_init(const char *name, int daemon_flag)
{
use_syslog = daemon_flag;
if (use_syslog)
openlog(name, LOG_PID, LOG_DAEMON);
}
void
logger_close(void)
{
if (use_syslog)
closelog();
}
void
logger_log(enum logger_lvl level, const char *format, ...)
{
int saved_errno = errno;
va_list vargs;
va_start(vargs, format);
if (use_syslog) {
switch (level) {
case log_lvl_info:
vsyslog(LOG_INFO, format, vargs);
break;
case log_lvl_warning:
vsyslog(LOG_WARNING, format, vargs);
break;
case log_lvl_err:
vsyslog(LOG_ERR, format, vargs);
break;
}
} else {
FILE *f = NULL;
switch (level) {
case log_lvl_info:
f = stdout;
fprintf(f, "[INFO] ");
break;
case log_lvl_warning:
f = stderr;
fprintf(f, "[WARNING] ");
break;
case log_lvl_err:
f = stderr;
fprintf(f, "[ERROR] ");
break;
default:
f = stderr;
fprintf(f, "[UNKNOWN] ");
break;
}
vfprintf(f, format, vargs);
}
errno = saved_errno;
}
void
logger_perror(const char *s)
{
int saved_errno = errno;
if (use_syslog) {
syslog(LOG_ERR, "%s: %s\n", s, strerror(errno));
} else {
perror(s);
}
errno = saved_errno;
}
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