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To: util-linux@vger.kernel.org
From: JPT <j-p-t@gmx.net>
Subject: [BUG] Mount: codepage mapping does not work for msdos fs
Date: Mon, 29 Dec 2014 13:48:23 +0100
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Hi,

I want to mount a DOS 5.0 partition without messing it up with LFNs.

According to man page this only works if I use the MSDOS fs instead of VFAT.

But using MSDOS fails on converting non ASCII chars.

If I mount using VFAT:
mount -t vfat -o check=strict,codepage=850,iocharset=iso8859-1,utf8
everything is fine:
ÄÄÄÄÄÄÄÄÄÄ AßLAR ÄÜÖßÄÜÖ istdaskürzer nochlänger
ABC ÄÜÖÄÜÖ äüößÄÜÖ2 longfilename öööööööööö

If I mount using MSDOS:
mount -t msdos -o check=strict,codepage=850
the chars aren't translated at all:
ls shows garbage:
?????? ????? ??????~1 ??????~1 ?????2 abc a?lar istdas~1 longfi~1 nochl?~1

if piped through less, you can see it delivers cp850 codes:

<8E><9A><99><8E><9A><99>
<8E><9A><99><U+139A><99>
<99><99><99><99><99><99>~1
<8E><8E><8E><8E><8E><8E>~1
<8E><9A><99><U+139A><99>2
abc
a<E1>lar
istdas~1
longfi~1
nochl<8E>~1

write access creates UTF8 codes on the disk (I believe, not verified)

Could you please have a look into it?

Linux TUX 3.16.0-28-generic #38-Ubuntu SMP Fri Dec 12 17:37:40 UTC 2014
x86_64
mount from util-linux 2.25.1 (libmount 2.25.0: selinux, assert, debug)

thanks

Jan