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From:	pbs <pnews AT tiscali DOT co DOT uk>
Subject:	login winXP home edition
Date:	Tue, 02 Oct 2007 16:45:01 +0100
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I am trying to get xdmcp to work on a winXP home edition machine. But
there are several issues that are cropping up. One of them can be
simplified by looking at problems with "login" from the command line prompt.

I have a number of Cygwin users and I have messed around with the
/etc/passwd file. The machine has a user called admin -- because the
administrator user does not seem to be available under XP home edition
other than in recovery mode etc.

Admin has administrator rights on the machine and I have altered the uid
to 0 in the /etc/passwd, so that it is root under Cygwin.

If I run login on the command from a bash command line prompt it works
for "login admin" and comes back with a "Last login:..." and "#",  but
for any other user it returns with
	Last login:..
	Login: no shell: /bin/bash: Permission denied
and looking at the log file I see the reason for the failure is
	CreateProcess failed, Win32 error 1314

Which is "A required privilege is not held by the client.
ERROR_PRIVILEGE_NOT_HELD" (see
http://help.netop.com/support/errorcodes/win32_error_codes.htm)

I see from this posting "Re: "incorrect password" or "permission denied"
when switching users"
(http://cygwin.com/ml/cygwin/2004-02/msg00649.html) an explanation for
this behaviour. Including reading the
/usr/share/doc/Cygwin/openssh.README (which is not on my machine but was
available from http://pigtail.net/LRP/printsrv/openssh.README.txt

Also  "Re: cygwin_logon_user() not working"
(http://cygwin.com/ml/cygwin/2003-07/msg00744.html)
http://cygwin.com/cygwin-ug-net/ntsec.html#NTSEC-SETUID


I have tried putting admin and the other user into the same group in
/etc/passwd (including SYSTEM group).

I have tried making the second user (lets call it USER2) admin in the
Windows XP Control panel->User Accounts, but that does not work either.

I have tried to log on Administrator but can not do so other than in
safe mode. http://support.microsoft.com/kb/290109/EN-US/

I also saw this "logon as a service for XP home edition"
(http://www.cygwin.com/ml/cygwin/2003-03/msg01298.html)
Which suggests using ntrights which led me to "How to Set Logon User
Rights with the Ntrights.exe Utility"
(http://support.microsoft.com/kb/279664)

This tool is available in rktooks "Windows Server 2003 Resource Kit
Tools"
http://www.microsoft.com/downloads/details.aspx?FamilyID=9d467a69-57ff-4ae7-96ee-b18c4790cffd&DisplayLang=en

But before I alter the group permissions at the windows OS level with
ntrights, I would like some advise on what I am doing because as an old
UNIX and VMS hacker I understand the concepts in principle but I do not
want to drive a coach and horses through Microsoft's attempts to protect
the system for what is basically an application level problem.

So any advice (or a URL to such advise) on how to set up a WinXP home
edition, to allow a Cygwin root user to use the login program to login
as another user would be appreciated. Regards pbs


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