void vdbg_msg(const char *sys, const char *fmt, va_list args)
{
	char str[1024*4];
	char *msg;
	int i, len;

	char timestr[80];
	str_timestamp_format(timestr, sizeof(timestr), FORMAT_SPACE);

	str_format(str, sizeof(str), "[%s][%s]: ", timestr, sys);

	len = strlen(str);
	msg = (char *)str + len;

#if defined(CONF_FAMILY_WINDOWS) && !defined(__GNUC__)
	_vsprintf_p(msg, sizeof(str)-len, fmt, args);
#else
	vsnprintf(msg, sizeof(str)-len, fmt, args);
#endif

	for(i = 0; i < num_loggers; i++)
		loggers[i](str);
}