root/honeytrap/trunk/src/logging.c

/* logging.c
 * Copyright (C) 2005-2007 Tillmann Werner <tillmann.werner@gmx.de>
 *
 * This file is free software; as a special exception the author gives
 * unlimited permission to copy and/or distribute it, with or without
 * modifications, as long as this notice is preserved.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 */

#include <stdio.h>
#include <stdarg.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <strings.h>

#include "honeytrap.h"
#include "logging.h"


void logmsg(int level, int add_time, const char *format, ...) {
        char logline[LOGLINE_SIZE];
        va_list ap;
        int bytes_written, logline_size;
        time_t timeval;
        
        if(level <= log_level) { 
                bzero(&logline, LOGLINE_SIZE);
                va_start(ap, format);
                if (add_time) {
                        time(&timeval);
                        strftime(logline, 23, "[%F %T] ", localtime(&timeval));
                        if (log_level == LOG_DEBUG)
                                snprintf(logline + strlen(logline), LOGLINE_SIZE - strlen(logline), "%5d  ", getpid());
                }
                vsnprintf(logline + strlen(logline), LOGLINE_SIZE - strlen(logline), format, ap);
                logline_size = strlen(logline);

                if ((bytes_written = write(logfile_fd, logline, logline_size)) != logline_size)
                        perror("Error while writing logfile");

                /* log to stdout as well if we are not running as daemon */
                if ((STDOUT_FILENO != logfile_fd) && (daemonize != 1)) {
                        if ((bytes_written = write(STDOUT_FILENO, logline, logline_size)) != logline_size) 
                                perror("Error while logging to stdout");
                }
                va_end(ap);
        }
        return;
}