Can't extract X cookie w/ ssh forwarding

From: Ian Pilcher (pilchman_at_attbi.com)
Date: 05/03/03 

Date: Sat, 03 May 2003 21:38:06 GMT

I am writing a script that needs to run an X client as a different user.
I am using 'xauth extract - $DISPLAY' to get the appropriate cookie.

This works fine for local users. When using ssh with X forwarding,
however, it doesn't work. Here is a brief example:

     [pilcher@home pilcher]$ ssh root@localhost
     root@localhost's password:
     Last login: Sat May 3 12:13:45 2003 from home
     [root@home root]# xauth extract - $DISPLAY > /dev/null
     No matches found, authority file "-" not written
     [root@home root]# xauth list
     home/unix:10 MIT-MAGIC-COOKIE-1 cbcfa5cca61304e806df71fd71ac9647
     home/unix:11 MIT-MAGIC-COOKIE-1 10e283e98dfe402cc6fb826b0341e43e
     [root@home root]# echo $DISPLAY
     localhost:11.0

Any ideas? Thanks! 

-- 
========================================================================
Ian Pilcher                                           pilchman@attbi.com
========================================================================

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