static void set_rtpfile(void)
{
	if(to_reset_log_file) {
		printf("%s: resetting the log file\n",__FUNCTION__);
		reset_rtpprintf();
		to_reset_log_file = 0;
	}

	if(to_syslog) {
		return;
	} else if (!_rtpfile) {
		signal(SIGHUP, sighup_callback_handler);
		if(log_fn_base[0]) {
			if(!strcmp(log_fn_base,"syslog")) {
				_rtpfile = stdout;
				to_syslog = 1;  //write here
			} else if(!strcmp(log_fn_base,"stdout")|| !strcmp(log_fn_base,"-")) {
				_rtpfile = stdout;
				no_stdout_log = 1;
			} else {
				set_log_file_name(log_fn_base,log_fn);
				_rtpfile = fopen(log_fn, "a");
				if(_rtpfile)
					TURN_LOG_FUNC(TURN_LOG_LEVEL_INFO, "log file opened: %s\n", log_fn);
			}
			if (!_rtpfile) {
				fprintf(stderr,"ERROR: Cannot open log file for writing: %s\n",log_fn);
			} else {
				return;
			}
		}
	}
}

void rollover_logfile(void)
{
	if(to_syslog || !(log_fn[0])) //read here
		return;

	....;
}