XChangeKeyboardMapping 3X11 __xorgversion__ XLIB FUNCTIONS XChangeKeyboardMapping XGetKeyboardMapping XDisplayKeycodes XSetModifierMapping XGetModifierMapping XNewModifiermap XInsertModifiermapEntry XDeleteModifiermapEntry XFreeModifierMap XModifierKeymap manipulate keyboard encoding and keyboard encoding structure int XChangeKeyboardMapping( Display *display, int first_keycode, int keysyms_per_keycode, KeySym *keysyms, int num_codes ); KeySym *XGetKeyboardMapping( Display *display, KeyCode first_keycode, int keycode_count, int *keysyms_per_keycode_return ); int XDisplayKeycodes ( Display *display , int *min_keycodes_return , int *max_keycodes_return ); int XSetModifierMapping( Display *display, XModifierKeymap *modmap ); XModifierKeymap *XGetModifierMapping( Display *display ); XModifierKeymap *XNewModifiermap( int max_keys_per_mod ); XModifierKeymap *XInsertModifiermapEntry ( XModifierKeymap *modmap, KeyCode keycode_entry, int modifier ); XModifierKeymap *XDeleteModifiermapEntry ( XModifierKeymap *modmap, KeyCode keycode_entry, int modifier ); int XFreeModifiermap( XModifierKeymap *modmap ); display Specifies the connection to the X server. first_keycode Specifies the first KeyCode that is to be changed or returned. keycode_count Specifies the number of KeyCodes that are to be returned. keycode_entry Specifies the KeyCode. keysyms Specifies an array of KeySyms. keysyms_per_keycode Specifies the number of KeySyms per KeyCode. keysyms_per_keycode_return Returns the number of KeySyms per KeyCode. max_keys_per_mod Specifies the number of KeyCode entries preallocated to the modifiers in the map. max_keycodes_return Returns the maximum number of KeyCodes. min_keycodes_return Returns the minimum number of KeyCodes. modifier Specifies the modifier. modmap Specifies the  XModifierKeymap  structure. num_codes Specifies the number of KeyCodes that are to be changed. The  XChangeKeyboardMapping  function defines the symbols for the specified number of KeyCodes starting with first_keycode. The symbols for KeyCodes outside this range remain unchanged. The number of elements in keysyms must be: num_codes * keysyms_per_keycode The specified first_keycode must be greater than or equal to min_keycode returned by  XDisplayKeycodes , or a  BadValue  error results. In addition, the following expression must be less than or equal to max_keycode as returned by  XDisplayKeycodes , or a  BadValue  error results: first_keycode + num_codes - 1 KeySym number N, counting from zero, for KeyCode K has the following index in keysyms, counting from zero: (K - first_keycode) * keysyms_per_keycode + N The specified keysyms_per_keycode can be chosen arbitrarily by the client to be large enough to hold all desired symbols. A special KeySym value of  NoSymbol  should be used to fill in unused elements for individual KeyCodes. It is legal for  NoSymbol  to appear in nontrailing positions of the effective list for a KeyCode.  XChangeKeyboardMapping  generates a  MappingNotify  event. There is no requirement that the X server interpret this mapping. It is merely stored for reading and writing by clients.  XChangeKeyboardMapping  can generate  BadAlloc  and  BadValue  errors. The  XGetKeyboardMapping  function returns the symbols for the specified number of KeyCodes starting with first_keycode. The value specified in first_keycode must be greater than or equal to min_keycode as returned by  XDisplayKeycodes , or a  BadValue  error results. In addition, the following expression must be less than or equal to max_keycode as returned by  XDisplayKeycodes : first_keycode + keycode_count - 1 If this is not the case, a  BadValue  error results. The number of elements in the KeySyms list is: keycode_count * keysyms_per_keycode_return KeySym number N, counting from zero, for KeyCode K has the following index in the list, counting from zero: (K - first_code) * keysyms_per_code_return + N The X server arbitrarily chooses the keysyms_per_keycode_return value to be large enough to report all requested symbols. A special KeySym value of  NoSymbol  is used to fill in unused elements for individual KeyCodes. To free the storage returned by  XGetKeyboardMapping , use  XFree .  XGetKeyboardMapping  can generate a  BadValue  error. The  XDisplayKeycodes  function returns the min-keycodes and max-keycodes supported by the specified display. The minimum number of KeyCodes returned is never less than 8, and the maximum number of KeyCodes returned is never greater than 255. Not all KeyCodes in this range are required to have corresponding keys. The  XSetModifierMapping  function specifies the KeyCodes of the keys (if any) that are to be used as modifiers. If it succeeds, the X server generates a  MappingNotify  event, and  XSetModifierMapping  returns  MappingSuccess . X permits at most 8 modifier keys. If more than 8 are specified in the  XModifierKeymap  structure, a  BadLength  error results. The modifiermap member of the  XModifierKeymap  structure contains 8 sets of max_keypermod KeyCodes, one for each modifier in the order  Shift ,  Lock ,  Control ,  Mod1 ,  Mod2 ,  Mod3 ,  Mod4 , and  Mod5 . Only nonzero KeyCodes have meaning in each set, and zero KeyCodes are ignored. In addition, all of the nonzero KeyCodes must be in the range specified by min_keycode and max_keycode in the  Display  structure, or a  BadValue  error results. An X server can impose restrictions on how modifiers can be changed, for example, if certain keys do not generate up transitions in hardware, if auto-repeat cannot be disabled on certain keys, or if multiple modifier keys are not supported. If some such restriction is violated, the status reply is  MappingFailed , and none of the modifiers are changed. If the new KeyCodes specified for a modifier differ from those currently defined and any (current or new) keys for that modifier are in the logically down state,  XSetModifierMapping  returns  MappingBusy , and none of the modifiers is changed.  XSetModifierMapping  can generate  BadAlloc  and  BadValue  errors. The  XGetModifierMapping  function returns a pointer to a newly created  XModifierKeymap  structure that contains the keys being used as modifiers. The structure should be freed after use by calling  XFreeModifiermap . If only zero values appear in the set for any modifier, that modifier is disabled. The  XNewModifiermap  function returns a pointer to  XModifierKeymap  structure for later use. The  XInsertModifiermapEntry  function adds the specified KeyCode to the set that controls the specified modifier and returns the resulting  XModifierKeymap  structure (expanded as needed). The  XDeleteModifiermapEntry  function deletes the specified KeyCode from the set that controls the specified modifier and returns a pointer to the resulting  XModifierKeymap  structure. The  XFreeModifiermap  function frees the specified  XModifierKeymap  structure. The  XModifierKeymap  structure contains: typedef struct { int max_keypermod; /∗ This server's max number of keys per modifier */ KeyCode *modifiermap; /∗ An 8 by max_keypermod array of the modifiers */ } XModifierKeymap;  BadAlloc  The server failed to allocate the requested resource or server memory.  BadValue  Some numeric value falls outside the range of values accepted by the request. Unless a specific range is specified for an argument, the full range defined by the argument's type is accepted. Any argument defined as a set of alternatives can generate this error. XFree(3X11), XSetPointerMapping(3X11) Xlib - C Language X Interface