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Date: Fri, 13 Sep 2013 01:53:34 +0400
From: Andrey Repin <anrdaemon AT yandex DOT ru>
Reply-To: Andrey Repin <cygwin AT cygwin DOT com>
Message-ID: <243576293.20130913015334@mtu-net.ru>
To: Matthias Meyer <matthias DOT meyer AT gmx DOT li>, cygwin AT cygwin DOT com
Subject: Re: How to read ntfs_reparse_data
In-Reply-To: <l0t81p$6te$1@ger.gmane.org>
References: <l0qodr$5cn$1 AT ger DOT gmane DOT org> <473536895 DOT 20130912015738 AT mtu-net DOT ru> <l0t81p$6te$1 AT ger DOT gmane DOT org>
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Greetings, Matthias Meyer!

>>> I've installed cygwin 1.7.20 on my Windows7 and try to get reparse data
>>> of a junction point:
>>> getfattr -h -e hex -n system.ntfs_reparse_data /cygdrive/C/Users/Default\
>>> User but I get an error:
>>> /cygdrive/C/Users/Default User: system.ntfs_reparse_data: Not supported
>> 
>>> If I mount the drive in Linux with ntfs-3g it will work. I get:
>>> # file: /cygdrive/C/Users/Default User
>>> system.ntfs_reparse_data=0x030000a0f00000000000760078006e005c....
>> 
>>> Anyone knows this "problem"? Is there a(nother) way to get the
>>> system.ntfs_reparse_data? Maybee with a windows program?
>> 
>>> I'ld like to restore a junction point within Linux/ntfs-3g.
>> 
>> http://www.cygwin.com/
>> The first four paragraphs.
>> TL;DR: You're looking the wrong way.

> Thanks for the answer but it doesn't help me ;)

Ok, I can give you another answer, more detailed, but I have no idea, how much
more usable, as I'm no expert in low-level NTFS specifics.
I can imagine Cygwin tools being able to read, store and restore OS-specific
file attributes, but I doubt these attributes have any use outside OS.
I.e., I was unable to use NTFS junction point under Linux. Junction was to a
second partition of the same drive, so there's no possibility of missing
partitions or similar mistakes on my part. ntfs-3g just doesn't work the same
way, as native Windows NTFS driver.

Oh, also... Are you sure you have full low-level access to partition in
question? I.e., it is not blocked by antivirus, or UAC?

> I would beliefe one of the cygwin libraries must read and interpret the 
> ntfs_reparse_data because cygwin will display it's content as an posix soft 
> link.
> So it would possible that getfattr can read this data too and the only 
> reason it don't work for me is a mistake by myself.

> What did you mean with "You're looking the wrong way"? What is the rigth 
> way?


--
WBR,
Andrey Repin (anrdaemon AT yandex DOT ru) 13.09.2013, <01:47>

Sorry for my terrible english...


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