XkbGetUpdatedMap  -   Update the client or server map information in an
   existing keyboard description


   Status  XkbGetUpdatedMap  (Display  *display,   unsigned   int   which,
          XkbDescPtr xkb);


   - display
          connection to X server

   - which
          mask selecting subcomponents to populate

   - xkb  keyboard description to be updated


   The  which parameter is a bitwise inclusive OR of the masks in Table 1.
   If  the  needed  components  of  the  xkb  structure  are  not  already
   allocated,  XkbGetUpdatedMap  allocates them.  XkbGetUpdatedMap fetches
   the requested information for the device specified  in  the  XkbDescRec
   passed in the xkb parameter.

                                 Table 1 Xkb Mapping Component Masks
                                      and Convenience Functions
   Mask                             Value    Map      Fields        Convenience
   XkbKeyTypesMask                  (1<<0)   client   types         XkbGetKeyTypes
                                                      size_types    XkbResizeKeyType
                                                      num_types     XkbCopyKeyType
   XkbKeySymsMask                   (1<<1)   client   syms          XkbGetKeySyms
                                                      size_syms     XkbResizeKeySyms
                                                      num_syms      XkbChangeTypesOfKey
   XkbModifierMapMask               (1<<2)   client   modmap        XkbGetKeyModifierMap
   XkbExplicitComponentsMask        (1<<3)   server   explicit      XkbGetKeyExplicitComponents
   XkbKeyActionsMask                (1<<4)   server   key_acts      XkbGetKeyActions
                                                      acts          XkbResizeKeyActions
   XkbKeyBehaviorsMask              (1<<5)   server   behaviors     XkbGetKeyBehaviors
   XkbVirtualModsMask               (1<<6)   server   vmods         XkbGetVirtualMods
   XkbVirtualModMapMask             (1<<7)   server   vmodmap       XkbGetVirtualModMap

   XkbGetUpdatedMap is synchronous; it queries the server for the  desired
   information,  waits  for  a  reply,  and  then  returns. If successful,
   XkbGetUpdatedMap returns  Success.  If  unsuccessful,  XkbGetUpdatedMap
   returns  one of the following: BadAlloc (unable to allocate a component
   in the XkbDescRec structure), BadValue (some mask  bits  in  which  are
   undefined),   BadImplementation   (a  compatible  version  of  the  Xkb
   extension is not available in the server or the reply from  the  server
   was invalid).


   Success        The XkbGetUpdatedMap function returns Success if a reply
                  is  received  to  the  server  query  for  the   desired


   The  complete description of an Xkb keyboard is given by an XkbDescRec.
   The component structures in the  XkbDescRec  represent  the  major  Xkb

   typedef struct {
      struct _XDisplay * display;      / connection to X server */
      unsigned short     flags;        / private to Xkb, do not modify */
      unsigned short     device_spec;  / device of interest */
      KeyCode            min_key_code; / minimum keycode for device */
      KeyCode            max_key_code; / maximum keycode for device */
      XkbControlsPtr     ctrls;        / controls */
      XkbServerMapPtr    server;       / server keymap */
      XkbClientMapPtr    map;          / client keymap */
      XkbIndicatorPtr    indicators;   / indicator map */
      XkbNamesPtr        names;        / names for all components */
      XkbCompatMapPtr    compat;       / compatibility map */
      XkbGeometryPtr     geom;         / physical geometry of keyboard */
   } XkbDescRec, *XkbDescPtr;

   The  display field points to an X display structure. The flags field is
   private  to  the  library:  modifying  flags  may  yield  unpredictable
   results.  The  device_spec field specifies the device identifier of the
   keyboard input device, or XkbUseCoreKeyboard, which specifies the  core
   keyboard  device.  The min_key_code and max_key_code fields specify the
   least and greatest keycode that can be returned by the keyboard.

   Each structure component has a corresponding mask bit that is  used  in
   function  calls to indicate that the structure should be manipulated in
   some manner, such as allocating it or freeing it. These masks and their
   relationships to the fields in the XkbDescRec are shown in Table 2.

           Table 2 Mask Bits for XkbDescRec
   Mask Bit               XkbDescRec Field   Value
   XkbControlsMask        ctrls              (1L<<0)
   XkbServerMapMask       server             (1L<<1)
   XkbIClientMapMask      map                (1L<<2)
   XkbIndicatorMapMask    indicators         (1L<<3)
   XkbNamesMask           names              (1L<<4)
   XkbCompatMapMask       compat             (1L<<5)
   XkbGeometryMask        geom               (1L<<6)
   XkbAllComponentsMask   All Fields         (0x7f)


   BadAlloc       Unable to allocate storage

                  Invalid reply from server

   BadValue       An argument is out of range


   XkbChangeTypesOfKey(3),      XkbCopyKeyType(3),     XkbCopyKeyTypes(3),
   XkbGetKeyActions(3),                             XkbGetKeyBehaviors(3),
   XkbGetKeyExplicitComponents(3),                XkbGetKeyModifierMap(3),
   XkbGetKeySyms(3),      XkbGetKeyTypes(3),       XkbResizeKeyActions(3),
   XkbResizeKeySyms(3),    XkbResizeKeyType(3),    XkbGetVirtualModMap(3),


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.

Free Software

Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.

Free Books

The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.