The current implementation of keysym_to_keycode does not
properly handle unused keycodes. The functions XkbKeySymsPtr
and XkbKeyGroupWidth mislead it into believing it is reading
a keysym associated with the unused keycode when in reality
it is reading a keysym associated with the *next used*
keycode.

This impacts different keys depending on the keyboard layout
in use. On mine for instance, the left Super key is unusable
because its keycode is preceeded by an unused keycode.

To resolve this issue, we take a page from XKeysymToKeycode
and use the function XKeycodeToKeysym instead of manually
accessing the keysyms.

https://sourceforge.net/tracker/?func=detail&aid=3555424&group_id=69596&atid=525124

Reported-by: alexmaret
Signed-off-by: Jason Gerecke <killert...@gmail.com>
---
 tools/xsetwacom.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tools/xsetwacom.c b/tools/xsetwacom.c
index aac8b7d..aea2243 100644
--- a/tools/xsetwacom.c
+++ b/tools/xsetwacom.c
@@ -1012,18 +1012,17 @@ static int keysym_to_keycode(Display *dpy, KeySym sym)
 
        for (kc = xkb->min_key_code; kc <= xkb->max_key_code; kc++)
        {
-               KeySym* ks;
                int i;
 
-               ks = XkbKeySymsPtr(xkb, kc);
                for (i = 0; i < XkbKeyGroupWidth(xkb, kc, state.group); i++)
-                       if (ks[i] == sym)
+                       if (XKeycodeToKeysym(dpy, kc, i) == sym)
                                goto out;
        }
 
 out:
        return kc;
 }
+
 /*
    Map gibberish like "ctrl alt f2" into the matching AC_KEY values.
    Returns 1 on success or 0 otherwise.
-- 
1.7.12


------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
Linuxwacom-devel mailing list
Linuxwacom-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linuxwacom-devel

Reply via email to