Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
X-Authentication-Warning: slinky.cs.nyu.edu: pechtcha owned process doing -bs
Date: Mon, 26 May 2003 23:56:30 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: "Reddie, Steven" <Steven DOT Reddie AT ca DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: mkpasswd and uid problem with domain accounts (16-bit wrapping?)
In-Reply-To: <1395B4B334FCC143B36AF788E68B63811E3BE9@ausyms21.ca.com>
Message-ID: <Pine.GSO.4.44.0305262352110.26092-100000@slinky.cs.nyu.edu>
Importance: Normal
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII

On Tue, 27 May 2003, Reddie, Steven wrote:

> I'm having problems with uid's which I think is due to 16-bit wrapping.
> I was recently transferred to a different domain and so ran "mkpasswd -d
> -u myusername newdomain" and got back an entry with a uid=133500 due to
> the tailing end of the SID being 123500.  I added this line to
> /etc/passwd.  My id get's reported as 2428 and it doesn't resolve to my
> username.  It seems that the value is wrapped to 16-bits.  If I change
> the uid value in /etc/passwd to 2428 everything seems to work.  I had
> some difficulty determining this at first and was wondering if it's
> expected or a bug.  The domain that I am now on would have well over
> 20,000 accounts and maybe far more, so this is why the uid is calculated
> as such a high value.  Does anyone have any further info?
>
> Regards,
> Steven

Steven,

This is exactly what happened; it's expected and is perfectly fine.
Cygwin UIDs are currently 16-bit.  Thankfully, you don't have to have your
Cygwin UID correspond in any way to your Windows SID -- it simply has to
be unique.  So, just change the UID to something (2428 works as well as
anything else, just make sure that you don't have another user with this
UID).  FYI, Cygwin 1.5 should have 32-bit UIDs.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"I have since come to realize that being between your mentor and his route
to the bathroom is a major career booster."  -- Patrick Naughton


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/