XkbGetKeyModifierMap - Update the modifier map for one or more of the keys in a keyboard description

dpy    connection to X server

       first  keycode of first key to get

       num    number of keys for which information is desired

       xkb    keyboard description to update

       The  modmap  entry of the client map is an array, indexed by keycode, specifying the real modifiers bound
       to a key. Each entry is a mask composed of a bitwise inclusive OR of the legal real modifiers: ShiftMask,
       LockMask, ControlMask, Mod1Mask, Mod2Mask, Mod3Mask, Mod4Mask, and Mod5Mask. If a bit is set in a  modmap
       entry, the corresponding key is bound to that modifier.

       Pressing  or  releasing  the  key  bound  to  a  modifier  changes  the modifier set and unset state. The
       particular manner in which the modifier set and unset state changes is determined  by  the  behavior  and
       actions assigned to the key.

       XkbGetKeyModifierMap  sends  a request to the server for the modifier mappings for num keys starting with
       the key whose keycode is first.  It waits for a reply and places  the  results  in  the  xkb->map->modmap
       array. If successful, XkbGetKeyModifier returns Success.

       If  the  map  component  of  the xkb parameter has not been allocated, XkbGetKeyModifierMap allocates and
       initializes it.

       If a compatible version of Xkb is not available in the server or the Xkb extension has not been  properly
       initialized, XkbGetKeySyms returns BadAccess. If any allocation errors occur while obtaining the modifier
       map, XkbGetKeyModifierMap returns BadAlloc.

BadAccess      The Xkb extension has not been properly initialized

       BadAlloc       Unable to allocate storage

X Version 11                                      libX11 1.8.12                          XkbGetKeyModifierMap(3)

       XkbGetKeyModifierMap - Update the modifier map for one or more of the keys in a keyboard description

StatusXkbGetKeyModifierMap(Display*dpy,unsignedintfirst,unsignedintnum,XkbDescPtrxkb);