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From:   OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
To:     Pali =?iso-8859-1?Q?Roh=E1r?= <pali.rohar@gmail.com>
Cc:     "Theodore Y. Ts'o" <tytso@mit.edu>, linux-kernel@vger.kernel.org,
        linux-fsdevel@vger.kernel.org, Namjae Jeon <linkinjeon@gmail.com>,
        Gabriel Krisman Bertazi <krisman@collabora.com>
Subject: Re: vfat: Broken case-insensitive support for UTF-8
References: <20200119221455.bac7dc55g56q2l4r@pali>
        <87sgkan57p.fsf@mail.parknet.co.jp> <20200120173215.GF15860@mit.edu>
        <87eevt4ga5.fsf@mail.parknet.co.jp>
        <20200121110049.4upreexmv5kxwp5n@pali>
Date:   Tue, 21 Jan 2020 21:26:34 +0900
In-Reply-To: <20200121110049.4upreexmv5kxwp5n@pali> ("Pali
 =?iso-8859-1?Q?Roh=E1r=22's?= message of
        "Tue, 21 Jan 2020 12:00:49 +0100")
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Pali Roh?r <pali.rohar@gmail.com> writes:

> On Tuesday 21 January 2020 12:52:50 OGAWA Hirofumi wrote:
>> BTW, VFAT has to store the both of shortname (codepage) and longname
>> (UTF16), and using both names to open a file. So Windows should be using
>> current locale codepage to make shortname even latest Windows for VFAT.
>
> fastfat.sys stores into shortnames only 7bit characters. Which is same
> in all OEM codepages. Non-7bit are replaced by underline or shortened by
> "~N" syntax. According to source code of fastfat.sys it has some
> registry option to allow usage also of full 8bit OEM codepage.
>
> So default behavior seems to be safe.

Are you sure if default is 7bit only? I'm pretty sure, at least, old
Windows version stored 8bit chars by default install.

Thanks.
-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>