Man page 3 : XkbGetNamedIndicator

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

Bool XkbGetNamedIndicator (Display * dpy , unsigned int dev_spec , Atom name , int * ndx_rtrn , Bool * state_rtrn , XkbIndicatorMapPtr map_rtrn , Bool * real_rtrn );

• - dpy
      connection to the X server
• - dev_spec
      keyboard device ID, or XkbUseCoreKbd
• - 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 XkbGetNamesto 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 XkbGetNamedIndicatorto look up information on the indicator named "Scroll Lock." If the device specified by device_spechas an indicator named name, XkbGetNamedIndicatorreturns True and populates the rest of the parameters with information about the indicator. Otherwise, XkbGetNamedIndicatorreturns False. The ndx_rtrnfield 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_rtrnreturns the current state of the named indicator (True = on, False = off). map_rtrnreturns the indicator map for the named indicator. In addition, if the indicator is mapped to a physical LED, the real_rtrnparameter is set to True. Each of the " _rtrn" arguments is optional; you can pass NULL for any unneeded " _rtrn" arguments.

• True
                 The XkbGetNamedIndicatorfunction returns True if the device specified by device_spechas an indicator named name.
• False
                 The XkbGetNamedIndicatorfunction returns False if the device specified by device_specdoes not have an indicator named name.

R XkbGetNames (3)