xkludge - Make X11R4 run on top of SunOS 4.1 SunView

[Gene H. Olson]

As has been discussed before in comp.sources.sun, and is very clear from
the X11R4 documentation, X11 is supposed to run on top of SunView.  This
requires that SUN_WINDOWS be defined in $TOP/config/sun.cf.  And it does
work GREAT with SunOS 4.0.3.

This feature makes it possible to run X on one frame buffer while you run
SunView on another.  You can switch between the screens with
"adjacentscreens" easily, and I find it very helpful.

However this feature is broken in SunOS 4.1.  If you try to bring up X on
top of Sunview it comes up, but hangs the keyboard.  Research leads me to
believe that Sun's documented (See 4.1 Release notes) changes to poll(2)
somehow broke it.

Hacker that I am, I recompiled it with -g and tried to debug it with
"trace" and "dbx".

To my great amazement, I found that attaching a debugger to the Xsun
server fixed the problem!  Since I really have no idea how the interface
works, and since I couldn't reproduce the problem with the debugger, I
reported the problem to Sun, and came up with "xkludge" shell script
enclosed below.

This workaround is an outrageous kludge.  It simply starts up the X
server, attaches to it with "trace", then kills the trace.  Using this
simple script the feature again works flawlessly, as it did under SunOS
4.0.3.  I leave it to some informed Sun guru to explain why!

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#		"End of shell archive."
# Contents:  xkludge
# Wrapped by gene at zeno on Mon Aug 13 00:52:33 1990
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f xkludge -a "${1}" != "-c" ; then 
  echo shar: Will not over-write existing file \"xkludge\"
else
echo shar: Extracting \"xkludge\" \(231 characters\)
sed "s/^X//" >xkludge <<'END_OF_xkludge'
XPATH=.:/usr/local/bin:/usr/bin/X11:/usr/ucb:/usr/bin:/usr/etc:/usr/sccs:/usr/5bin
Xexport PATH
X/usr/bin/X11/xinit &
Xsleep 15
XX=`ps -ax | sed -n -e 's/^ *\([0-9]*\) .* X :0$/\1/p'`
Xtrace -p $X 2>/dev/null &
XT=$!
Xsleep 5
Xkill $T
Xwait
END_OF_xkludge
if test 231 -ne `wc -c <xkludge`; then
    echo shar: \"xkludge\" unpacked with wrong size!
fi
chmod +x xkludge
# end of overwriting check
fi
echo shar: End of shell archive.
exit 0
_________________________________________________________________________
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