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From: dpm@cs.cmu.edu (David Maynard)
Newsgroups: comp.windows.x
Subject: Re: DECWindows and Sample Server Compatibility
Message-ID: <1990Jun5.191532.5384@cs.cmu.edu>
Date: 5 Jun 90 19:15:32 GMT
References: <12184@shlump.nac.dec.com>
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Reply-To: dpm@cs.cmu.edu (David Maynard)
Organization: Carnegie Mellon University, Pittsburgh, Pennsylvania
Lines: 50


>Bad protocol
>------------
>'dxcalendar' is the specific app (as Jim Gettys mentions) that we have seen
>break the protocol. We have also seen it die trying to create zero width
>windows (I think that was the case), but we are not able to easily duplicate
>this, so it may not be a real problem.

The following (unofficial, unsupported, undesireable, etc...) patch to the
X11R4 sample server has allowed me to display dxcalendar on the Sun (Sun-2
and Sun-3, SunOS 3.5).

Since the patch adds another clause to the "bug-compatibility mode" of the
sample server it could potentially allow programs to do bad or damaging
things.  I don't think that would be a problem in most cases, but as always,
"let the buyer beware."  My server is only up to fixlevel 9 so the diff may
change with more recent fixes.  As always, be sure to save the unpatched
version so that later official patches don't break.  I don't recommend
diverging from the MIT sources, but if you insist...

--- Begin patch ---
*** mit/server/dix/events.c.save	Tue Jun  5 14:04:02 1990
--- mit/server/dix/events.c	Tue Jun  5 14:05:56 1990
***************
*** 2921,2927 ****
  	client->errorValue = stuff->event.u.u.type;
  	return BadValue;
      }
!     if (stuff->eventMask & ~AllEventMasks)
      {
  	client->errorValue = stuff->eventMask;
  	return BadValue;
--- 2921,2927 ----
  	client->errorValue = stuff->event.u.u.type;
  	return BadValue;
      }
!     if ((stuff->eventMask & ~AllEventMasks) && !permitOldBugs)
      {
  	client->errorValue = stuff->eventMask;
  	return BadValue;
--- End patch ---

 ---
 David P. Maynard (dpm@cs.cmu.edu)
 Dept. of Electrical and Computer Engineering
 Carnegie Mellon University, Pittsburgh, PA  15213
 ---
 Any opinions expressed are mine.  I haven't asked the ECE 
 department or CMU what they think.
 ---