XDM Login Broken

[Bill Campbell]

On Sat, Apr 06, 2002 at 09:41:32PM -0500, Kurt Wall wrote:
>Okay, so I upgraded XFree and now I can't login using XDM (spare me
>the use KDM/GDM, please). I login without incident, the screen clears
>as if getting ready to start my session, and then I'm back at the
>login window. This happens for root and mortal users. I can use startx just
>fine, as root and as mere mortal.
>
>>From /var/log/xdm-errors:
>AUDIT: Sat Apr  6 20:32:44 2002: 587 X: client 2 rejected from local host
>
>>From $HOME/.xsession-errors:
>Xlib: connection to ":0.0" refused by server
>Xlib: Client is not authorized to connect to Server
>Error: Can't open display: :0
>
>Obviously, it's an authorization problem, but I'm not sure where to
>look. System is Slackware 8.0 with considerable modifications. X is
>4.1.0, kernel is 2.4.18 (although I doubt this matters). I have a
>newly compiled XFree86 4.2.0 ready to go when I sort this out.

Actually it's a problem with the DISPLAY variable.  For some
reason which I've never been able to understand, starting X
sometimes wants to use DISPLAY=:0.0 which isn't allowed by the
default configuration.  The attached xserverrc from one of our
Caldera systems has one extra line after the ``done'' statement
to make it work.  This file, /etc/X11/xinit/xserverrc, is not
defined by default in Caldera 3.1* systems, and requires some
fiddling of other startup scripts to have them recognize it.

Bill
--
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#!/bin/bash

XAUTH=$HOME/.Xauthority
MKCOOKIE=/usr/bin/mcookie

touch $XAUTH

for host in localhost $HOSTNAME $HOST; do
    xauth add $host/unix:0 . `$MKCOOKIE`
    xauth add $host:0 . `$MKCOOKIE`
done
xauth add :0.0 . `$MKCOOKIE`

exec Xwrapper -auth $XAUTH :0