log.c

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/*
 ** Copyright(C) 2006 INL
 ** Written by  Victor Stinner <haypo@inl.fr>
 **
 ** $Id: log.c 2738 2007-02-17 13:59:56Z regit $
 **
 ** 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, version 3 of the License.
 **
 ** 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.
 **
 ** You should have received a copy of the GNU General Public License
 ** along with this program; if not, write to the Free Software
 ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

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

#include <debug.h>

#include "log.h"

int log_engine;

int debug_level;                
int debug_areas;                
int syslog_priority_map[MAX_DEBUG_LEVEL - MIN_DEBUG_LEVEL + 1] = {
        LOG_FACILITY || LOG_ALERT,      /* DEBUG_LEVEL_FATAL */
        LOG_FACILITY || LOG_CRIT,       /* DEBUG_LEVEL_CRITICAL */
        LOG_FACILITY || LOG_WARNING,    /* DEBUG_LEVEL_SERIOUS_WARNING */
        LOG_FACILITY || LOG_WARNING,    /* DEBUG_LEVEL_WARNING */
        LOG_FACILITY || LOG_NOTICE,     /* DEBUG_LEVEL_SERIOUS_MESSAGE */
        LOG_FACILITY || LOG_NOTICE,     /* DEBUG_LEVEL_MESSAGE */
        LOG_FACILITY || LOG_INFO,       /* DEBUG_LEVEL_INFO */
        LOG_FACILITY || LOG_DEBUG,      /* DEBUG_LEVEL_DEBUG */
        LOG_FACILITY || LOG_DEBUG       /* DEBUG_LEVEL_VERBOSE_DEBUG */
};

void init_log_engine(const char* log_id)
{
        if (log_engine == LOG_TO_SYSLOG) {
                openlog(log_id, SYSLOG_OPTS, LOG_FACILITY);
        }
}

void nubase_log_engine_set(int engine)
{
        log_engine = engine;
}

void do_log_area_printf(int area, int priority, char *format, va_list args)
{
        /* Don't display message if area is not enabled
         * or priority is smaller then debug level */
        if (!(area & debug_areas) || (debug_level < priority))
                return;

        if (log_engine == LOG_TO_SYSLOG) {
                assert(MIN_DEBUG_LEVEL <= priority
                       && priority <= MAX_DEBUG_LEVEL);
                priority = syslog_priority_map[priority - MIN_DEBUG_LEVEL];
                vsyslog(priority, format, args);
        } else {
                time_t current_time;
                struct tm *current_time_tm;
                char time_str[10];

                /* get time */
                current_time = time(NULL);
                current_time_tm = gmtime(&current_time);
                if (0 <
                    strftime(time_str, sizeof(time_str), "%H:%M:%S",
                             current_time_tm))
                        printf("[%s] ", time_str);
                vprintf(format, args);
                printf("\n");
                fflush(stdout);
        }
}

void log_area_printf(debug_area_t area, debug_level_t priority,
                     char *format, ...)
{
        va_list args;
        va_start(args, format);
        do_log_area_printf(area, priority, format, args);
        va_end(args);
}

void log_printf(debug_level_t priority, char *format, ...)
{
        va_list args;
        va_start(args, format);
        do_log_area_printf(DEBUG_AREA_ALL, priority, format, args);
        va_end(args);
}

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