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Date: Thu, 19 Apr 2018 15:45:52 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Issue when trying to access files on a locked BitLocker volume
Message-ID: <20180419134552.GQ15911@calimero.vinschen.de>
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On Apr 19 13:38, Vincent Gheur wrote:
> Hi,
>=20
> I'm using a Bitlocker encrypted SD card, which stays most of the time in =
my
> laptop, but is generally not unlocked. I'm unlocking it only when I need =
to
> access files on it.
>=20
> I have also a script which is started at regular intervals, which copies
> some critical files on the SD card when it is unlocked. I was using till
> recently a *very* old version of cygwin (probably downloaded 10 years ago=
),
> in which I could check whether my SD card was unlocked or not by using *if
> [ -d <folder-on-SD-card> ]*. I have downloaded a new version of cygwin in
> January, as I migrated to Windows 10 and was encountering some issues with
> it. Since I upgraded, this test is not working anymore. When the SD card =
is
> unlocked, testing " -d <folder> " returns TRUE. It returns FALSE when I do
> the same test on a non Bitlocker volume for a non-existent folder (which =
is
> the expected behaviour).

I'm not sure I understand.

You're testing with -d <non-existing-folder> if the drive is unlocked?
And you're expecting... what exactly?  The test should return FALSE in
all cases, regardless of the drive being locked or unlocked.

Sure, it sounds wrong if -d <non-existing-folder> returns TRUE, but
I wonder if I misunderstand what you're doing.

Can you rephrase this to make it more clear?

Also, can you create an strace of the wrong behaviour to see if there's
a certain error or NT status code which indicates the problem to be
handled more correctly?


Thanks,
Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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