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Date: Fri, 21 Apr 2006 01:15:55 -0400 (EDT)
From: Igor Peshansky <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Steve Kelem <skelem AT elementcxi DOT com>
cc: cygwin AT cygwin DOT com
Subject: Re: useradd & user ids
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On Thu, 20 Apr 2006, Steve Kelem wrote:

> Igor Peshansky said the following on 4/20/2006 12:24 PM:
> > On Thu, 20 Apr 2006, Steve Kelem wrote:
> >
> > > How do I set my user & group id to a specific value?  I would like
> > > it to match the uid & gid assigned by Linux on our main server. If
> > > my local settings match the main server's, then ssh works more
> > > smoothly.
> >
> > Do you mean the name or the numeric value?  In either case, just edit
> > /etc/passwd and /etc/group on Cygwin -- the SID is the only value that
> > really matters as far as Windows is concerned.  All the rest is up to
> > you.
>
> Actually, I meant "how do I do it so that I don't have to edit
> /etc/{passwd,group} manually each time I add a user to XP?"  Is there a
> way to specify the mapping to uid/gid numbers so that I get the same
> passwd file automatically? If not, I guess I could write a script.

I'm confused: a mapping from what to what?  The SIDs will be different on
every Windows machine -- Windows assigns them, and Cygwin has not control
over that.  If you simply want to say "I'd like to add a user with a given
numeric UID", there is currently no way of doing this on Cygwin.
Besides, the default mapping is to take the last 4 digits of the SID for
the UID for local users, and 10000 + the last 4 digits of the SID for
domain users, so every time you regenerate your /etc/passwd with
/bin/mkpasswd, your custom UIDs will be lost.  There's no way to specify a
custom SID to UID mapping, though it may be possible to patch mkpasswd
(and mkgroup) to have such an option...
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_	    pechtcha AT cs DOT nyu DOT edu | igor AT watson DOT ibm DOT com
ZZZzz /,`.-'`'    -.  ;-;;,_		Igor Peshansky, Ph.D. (name changed!)
     |,4-  ) )-,_. ,\ (  `'-'		old name: Igor Pechtchanski
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

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