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Re: useradd & user ids


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
-- 
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