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MIME-Version: 1.0
Date: Wed, 28 Oct 2009 13:33:05 -0400
Message-ID: <f8a051a90910281033y3627c3d0tf2696529de635ec7@mail.gmail.com>
Subject: Setting permissions in DJGPP.ENV
From: Ersin Akinci <ersin DOT akinci AT gmail DOT com>
To: djgpp AT delorie DOT com
Content-Type: text/plain; charset=ISO-8859-1
Reply-To: djgpp AT delorie DOT com

Hi all,

I was wondering if it's possible to set UNIX-like permissions for
arbitrary files through DJGPP.ENV.  I'm trying to use a DOS port of
Mutt (the e-mail client) to check my mail on an SSL-encrypted IMAP
server, but OpenSSL requires /dev/random to generate entropy for
encryption.  Since DOS has no such file, you can pass it a "randfile"
manually that contains hand-edited random data or you can use the
"noise" driver (available at http://www.rahul.net/dkaufman/) to
generate a random file at C:\.rnd.  The problem is that Mutt checks
the permissions on this file, which in a *nix environment would be a
device node at /dev/random, and requires them to be set to 600.  Now,
although DOS doesn't support permissions, when I check the permissions
of my custom randfile or the .rnd file generated by the noise driver
using ls.exe provided by DJGPP it returns 644 (r/w owner, r group, r
everyone).

I tried fiddling around with attrib and chmod, but there's no way to
disable access to "non-dosuser" users through those programs.  My
alternatives at this point are to either find some other way to fake
the permissions or hack Mutt/OpenSSL not to check for permissions and
recompile.  Obviously the first would be preferable!  Another
alternative would be to use another DOS e-mail client that supports
SSL, but I haven't been able to find one.  I also tried using HX DOS
Extender to maybe get a simple Win32 SSL-capable mail client to work,
but I've been unsuccessful so far...

Any ideas?

Thanks,
Ersin