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From: "Gerald S. Williams" <gsw AT agere DOT com>
To: <cygwin-developers AT cygwin DOT com>
Subject: Re: True case-sensitive filenames
Date: Fri, 24 Jan 2003 13:01:19 -0500
Message-ID: <GBEGLOMMCLDACBPKDIHFIEFADBAA.gsw@agere.com>
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In-Reply-To: <GBEGLOMMCLDACBPKDIHFGEDFDBAA.gsw@agere.com>

> The next thing to try is attempting to set the current
> working directory using NtSetInformationProcess(). I'm
> currently way over my Cygwin-development allotment for
> this week, though.

I just couldn't let this one sit, so I stayed up late
working on it. Sure enough, you can set the current
directory in a case-sensitive fashion. I verified that
GetCurrentDirectory() responds to the change (Cygwin's
getcwd() currently doesn't, of course).

You don't actually use NtSetInformationProcess()--you
just need to get at the PEB somehow (you could use
NtQueryInformationProcess(), but NtCurrentTeb()->Peb
is faster). Peb->FastPebLockRoutine(Peb->FastPebLock)
locks the structure, then you can directly change
Peb->ProcessParameters->CurrentDirectoryHandle and
Peb->ProcessParameters->CurrentDirectoryName.

-Jerry