Hi, Izumi, sorry for reply so late because I am busy in
reading codes and coding. X-)
I have fixed the source as your suggestion, if you have 
spare time, please have it a look, thanks.
Also thanks Havard for his attachment!

> I would also like to change function and variable
> names to the style used in other BSD sources.
> (though it is not part of KNF)
> I spent many hours for it on porting iha(4) ;-)

I will try to do this later. :)