[Xen-devel] Re: 3.0.3 without X

[Ewan Mellor <ewan@xxxxxxxxxxxxx>]

On Thu, Jan 04, 2007 at 01:32:49PM -0600, Anthony Liguori wrote:

> Ewan Mellor wrote:
> >On Thu, Jan 04, 2007 at 03:01:08PM +0000, Keir Fraser wrote:
> >
> >>On 4/1/07 14:58, "ron minnich" <rminnich@xxxxxxxxx> wrote:
> >>
> >>>note that we're distributing an x11-free xen for plan 9 support, so I
> >>>sure hope that x11 dependencies are not about to start appearing in
> >>>xen.
> >>The dependencies are only in HVM-specific bits of the tools/ directory.
> >>Those are easily disabled, albeit with a smidgen of Makefile changes.
> >
> >They also aren't really X11 dependencies.  That code includes
> ><X11/keysymdef.h>, because VNC uses the same keysyms as X, but there's no
> >dependency upon X client libraries.
> 
> This dependency is actually a bug that was introduced in the Xen tree 
> (it isn't present in qemu CVS).
> 
> The VNC spec makes it pretty clear that you cannot rely on the symbolic 
> names of X keycodes to develop a portable VNC client.  Apparently they 
> change slightly across different X implementations.

>From www.realvnc.com/docs/rfbproto.pdf:

"The key itself is specified using the "keysym" values defined by the X Window
System.

For most ordinary keys, the "keysym" is the same as the corresponding
ASCII value.  For full details, see The Xlib Reference Manual, published by
O'Reilly & Associates, or see the header file <X11/keysymdef.h> from any X
Window System installation."


How do we choose which X keysyms to use, if they vary across X
implementations?

Ewan.

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