fg_log.c

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/*
 * Copyright (C) 2014 Alexander Zimmermann <alexander.zimmermann@netapp.com>
 * Copyright (C) 2010-2013 Christian Samsel <christian.samsel@rwth-aachen.de>
 * Copyright (C) 2009 Tim Kosse <tim.kosse@gmx.de>
 * Copyright (C) 2007-2008 Daniel Schaffrath <daniel.schaffrath@mac.com>
 *
 * This file is part of Flowgrind.
 *
 * Flowgrind 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 3 of the License, or
 * (at your option) any later version.
 *
 * Flowgrind 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 Flowgrind.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 
#include <syslog.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <time.h>
 
#include "fg_log.h"
#include "fg_time.h"
#include "fg_error.h"
 
static enum log_streams log_stream = LOG_SYSLOG;
 
void init_logging(enum log_streams stream)
{
        log_stream = stream;
 
        switch (log_stream) {
        case LOGGING_SYSLOG:
                openlog("flowgrindd", LOG_NDELAY | LOG_CONS | LOG_PID, LOG_DAEMON);
                break;
        case LOGGING_STDERR:
        case LOGGING_STDOUT:
                break;
        }
}
 
void close_logging(void)
{
        switch (log_stream) {
        case LOGGING_SYSLOG:
                closelog();
                break;
        case LOGGING_STDERR:
        case LOGGING_STDOUT:
                break;
        }
}
 
void logging(int priority, const char *fmt, ...)
{
        va_list ap;
 
        va_start(ap, fmt);
        vlogging(priority, fmt, ap);
        va_end(ap);
}
 
void vlogging(int priority, const char *fmt, va_list ap)
{
        char timestamp[30] = "";
        ctimenow_r(timestamp, sizeof(timestamp), false);
 
        switch (log_stream) {
        case LOGGING_SYSLOG:
                vsyslog(priority, fmt, ap);
                break;
        case LOGGING_STDERR:
                fprintf(stderr, "%s ", timestamp);
                vfprintf(stderr, fmt, ap);
                fprintf(stderr, "\n");
                fflush(stderr);
                break;
        case LOGGING_STDOUT:
                fprintf(stdout, "%s ", timestamp);
                vfprintf(stdout, fmt, ap);
                fprintf(stdout, "\n");
                fflush(stdout);
                break;
        }
 
}