/*
   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, 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.

   Derived from checkpassword-pam by Alexey Mahotkin <alexm@hsys.msk.ru> 2002-2004
   Modified and enhanced by Manuel Mausz 2017
*/

#define _DEFAULT_SOURCE 1

#include <stdio.h>
#include <stdarg.h>
#include <syslog.h>

#include "logging.h"

extern int opt_debug;
extern int opt_use_syslog;

inline void log_init(const char *ident)
{
    if (opt_use_syslog)
        openlog(ident, LOG_PID, LOG_AUTH);
}

inline void log_close()
{
    closelog();
}

void log_error(const char *format, ...)
{
    va_list args;
    va_start(args, format);

    if (opt_use_syslog)
        (void)vsyslog(LOG_ERR, format, args);
    else {
        (void)vfprintf(stderr, format, args);
        (void)fputc('\n', stderr);
    }
}

void log_debug(const char *format, ...)
{
    if (!opt_debug)
        return;

    va_list args;
    va_start(args, format);
    if (opt_use_syslog)
        (void)vsyslog(LOG_DEBUG, format, args);
    else {
        (void)vfprintf(stderr, format, args);
        (void)fputc('\n', stderr);
    }
}