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Date:      Wed, 23 May 2007 16:28:52 -0500
From:      Scott Allendorf <scott-allendorf@uiowa.edu>
To:        x11@freebsd.org
Subject:   startx problem (was Re: HEADS UP: xorg upgrade plans)
Message-ID:  <4654B214.8090008@uiowa.edu>
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[-- Attachment #1 --]
On Wed, 2 May 2007, Stephen Montgomery-Smith wrote:

 > On Wed, 2 May 2007, Kris Kennaway wrote:
 >
 >> On Wed, May 02, 2007 at 02:40:26PM -0500, Stephen Montgomery-Smith 
wrote:
 >>
 >>> Secondly, X7.2 as I tried it wouldn't "startx" if some other login had
 >>> created a .Xauthority file.  While "rm .Xauthority" solved the problem
 >>> completely, I don't think this is user friendly.
 >>
 >> I think I ran into this once a while back, I don't know what is the
 >> correct solution.
 >
 > Perhaps you could put in some kind of "setenv XAUTHORITY 
.Xlocalauthority"
 > in a script somewhere.
 >
 > Actually this one can bite you quite badly.  If you are running X, and
 > then you login from somehwere else, and then go back to the X session,
 > then suddenly all your X commands like xterm will completely stop 
working.
 > It can be really disconcerting if you don't know what caused it, and 
I can
 > see a large number of help messages being generated on the various
 > bulletin boards.

I compared the 6.9 startx script to the one installed by the 7.2 
x11/xinit port.  I found that the older script contained a block of code 
that fixes the problem described above.  In the x11/xinit port the code 
is present in startx.cpp, but is protected by:

#if defined(HAS_COOKIE_MAKER) && defined(MK_COOKIE)
...
#endif

If these defines are set properly during the build, then startx should 
return to its previous behavior.  I have verified this by using the 6.9 
script (with paths changed) on a system that has 7.2 installed.

 From /usr/local/lib/X11/config/FreeBSD.cf:

#if OSMajorVersion >= 4
#define HasCookieMaker          YES
#define MkCookieCmd \
         'dd if=/dev/urandom bs=16 count=1 2>/dev/null | hexdump -e 
\\"%08x\\"'
#else
#define HasCookieMaker          NO
#endif
#endif

Cheers,

Scott

-- 
Scott C. Allendorf                     Email:  scott-allendorf@uiowa.edu
UNIX Systems Administrator             Office:       216A Van Allen Hall
Department of Physics and Astronomy    Voice:             (319) 335-0003
The University of Iowa                 FAX:               (319) 335-1753
Iowa City, Iowa  52242-1479            ICBM:  41 39 43.6 N  91 31 55.1 W

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