Re: trying to implement an event handler for XrandR events

[D M German <dmg uvic ca>]

 D> Hi Everybody,

 D> I am trying to implement an event handler for XRandR events. I think I
 D> have everything in place, but I am getting a strange error. 

 D> I have linked sawfish to the xrandr library:

I just discovered the problem.... the event_init is executed even in
batch mode, when no display is available (and the dpy variable is not
initialized).

--dmg



 D> sawfish : $(OBJS) $(LIBOBJS)
 D> 	$(rep_LIBTOOL) --mode=link --tag=CC $(CC) -export-dynamic $(LDFLAGS) \
 D> 	  -o sawfish $(OBJS) $(LIBOBJS) $(REP_LIBS) $(PANGO_LIBS) \
 D> 	  $(IMAGE_LIBS) $(X11_LIBS) $(EXTRA_X11_LIBS) $(LIBS) $(XRANDR_LIBS)

 D> but when sawfish is executed, I get the following error.


 D> dmg phosphorus:~/git.w/sawfish/src$ ./sawfish --batch
 D> rep: received fatal signal: Segmentation fault

 D> struct debug_buf common:

 D> Backtrace in `fatal_signal_handler':
 D> 	<(null)+-1223764632>
 D> 	<XInitExtension+59>
 D> 	<XextAddDisplay+76>
 D> 	<(null)+-1222343312>
 D> 	<XRRQueryExtension+17>
 D> 	<events_init+44>
 D> 	<main+1748>
 D> 	<__libc_start_main+230>

 D> Lisp backtrace:

 D> Segmentation fault
 D> ----------------------------------------------------------------------
 D> The code is fairly simple (beginning of events_init):

 D> #ifdef HAVE_X11_EXTENSIONS_XRANDR_H
    int dummy;
    int randr_event_base; /* Will give us the offset for the xrandr events */
 D> #endif

    has_randr = FALSE;
 D> #ifdef HAVE_X11_EXTENSIONS_XRANDR_H
    has_randr = XRRQueryExtension( dpy, &randr_event_base, &dummy );
 D> #endif
 D> ----------------------------------------------------------------------

 D> ANy suggestions?

 D> Thanks!

 D> --dmg



 D> -- 
 D> --
 D> Daniel M. German                  
 D> http://turingmachine.org/
 D> http://silvernegative.com/
 D> dmg (at) uvic (dot) ca
 D> replace (at) with @ and (dot) with .


-- 
--
Daniel M. German                  
http://turingmachine.org/
http://silvernegative.com/
dmg (at) uvic (dot) ca
replace (at) with @ and (dot) with .