Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!apple!usc!orion.cf.uci.edu!uci-ics!hadley
From: hadley@ics.uci.edu (T.S. Hadley)
Newsgroups: comp.windows.x
Subject: Xhp Non-portable code
Summary: NULL pointer dereferencing
Message-ID: <19400@paris.ics.uci.edu>
Date: 10 Jul 89 20:53:17 GMT
References: <3780001@hpsgpa.HP.COM>
Sender: news@paris.ics.uci.edu
Reply-To: T.S. Hadley <hadley@icarus.ics.uci.edu>
Organization: University of California, Irvine - Dept of ICS
Lines: 20


   Some of the Xhp code included with the X11 R3 distribution 
   (contrib/widgets/Xhp) dereferences NULL pointers.

   Example:
      Xw/SText : 

	 ...
	 strcpy(stp->output_string, stp->input_string);
   
      Where stp->input_string CAN be NULL.
   
   While this causes no problems (I'm told) on a Vax with VMS/BSD,
   on my Sun (SunOS 4.0) it immediately causes a segmentation violation.

   Has anyone created a patch to this library to fix the problem?

   Grateful thanks.
--
Tedd Hadley (hadley@ics.uci.edu)