>output_data:
>	ret = vsnprintf(nfrontp, remaining, format, args);
>	nfrontp += ret;
>shouldn't this be:
>       	ret = vsnprintf(nfrontp, remaining, format, args);
>	nfrontp += min(ret, remaining-1);

	i guess they are the same on overflow (am I wrong?).  from printf(3):

     These functions return the number of characters printed (not including
     the trailing `\0' used to end output to strings).

itojun