Just short reply (longer will follow later):

> Converting unicode to other characterset is quite problematic.
> How does that code handle the problem when the kernel will convert
> EUC-jp filename to ISO-8859-1?

You are OOL in that case.

> IMHO, for NTFS, best solution is leave the conversion to userland.
> (like emacs's path-coding-system variable.)

Do you feel like changing all the userland to handle the filenames
on NTFS specially and convert it's name to the programs
preferred charset ?

> And, normal CD9660 is not limited to Unicode, there is CD-ROM
> which is encoded by Shift-JIS and other character sets.

But I hope Joliet-style CD's use only Unicode.

Jaromir