XkbGetNamedIndicator - Look up the indicator map and other information for an indicator by name

dpy    connection to the X server

       dev_spec
              keyboard device ID, or XkbUseCoreKbd

       led_class
              feedback class, or XkbDfltXIClass

       led_id feedback ID, or XkbDfltXIId

       name   name of the indicator to be retrieved

       ndx_rtrn
              backfilled with the index of the retrieved indicator

       state_rtrn
              backfilled with the current state of the retrieved indicator

       map_rtrn
              backfilled with the mapping for the retrieved indicator

       real_rtrn
              backfilled with True if the named indicator is real (physical)

       Xkb also allows applications to refer to indicators by name. Use XkbGetNames to get the indicator  names.
       Using  names  eliminates  the  need for hard-coding bitmask values for particular keyboards. For example,
       instead of using vendor-specific constants such as WSKBLed_ScrollLock mask  on  Digital  workstations  or
       XLED_SCROLL_LOCK  on  Sun  workstations,  you  can  instead  use  XkbGetNamedDeviceIndicator  to  look up
       information on the indicator named "Scroll Lock."

       If the device specified by device_spec has an indicator named  name,  XkbGetNamedDeviceIndicator  returns
       True  and  populates  the  rest  of  the  parameters  with  information  about  the indicator. Otherwise,
       XkbGetNamedDeviceIndicator returns False.

       The ndx_rtrn field returns the zero-based index of the named indicator. This index is the bit position to
       use in any function call that requires a mask of indicator bits, as well as the  indicator's  index  into
       the XkbIndicatorRec array of indicator maps.  state_rtrn returns the current state of the named indicator
       (True  =  on,  False = off).  map_rtrn returns the indicator map for the named indicator. In addition, if
       the indicator is mapped to a physical LED, the real_rtrn parameter is set to True.

       Each of the " _rtrn " arguments is optional; you can pass NULL for any unneeded " _rtrn " arguments.

       XkbGetNamedIndicator is a convenience function that calls XkbGetNamedDeviceIndicator with  a  device_spec
       of  XkbUseCoreKbd,  a  led_class  of  XkbDfltXIClass, and a led_id of XkbDfltXIId.  It returns the return
       value from XkbGetNamedDeviceIndicator.

       XkbGetNamedIndicator - Look up the indicator map and other information for an indicator by name

       True           The XkbGetNamedIndicator and  XkbGetNamedDeviceIndicator  functions  return  True  if  the
                      device specified by device_spec has an indicator named name.

       False          The  XkbGetNamedIndicator  and  XkbGetNamedDeviceIndicator  functions  return False if the
                      device specified by device_spec does not have an indicator named name.

XkbGetNames(3)

X Version 11                                      libX11 1.8.12                          XkbGetNamedIndicator(3)

BoolXkbGetNamedDeviceIndicator(Display*dpy,unsignedintdev_spec,unsignedintled_class,unsignedintled_id,Atomname,int*ndx_rtrn,Bool*state_rtrn,XkbIndicatorMapPtrmap_rtrn,Bool*real_rtrn);BoolXkbGetNamedIndicator(Display*dpy,Atomname,int*ndx_rtrn,Bool*state_rtrn,XkbIndicatorMapPtrmap_rtrn,Bool*real_rtrn);