gnupg: Agent GETEVENTCOUNTER

 
 2.6.15 Get the Event Counters
 -----------------------------
 
        GETEVENTCOUNTER
 
    This function return one status line with the current values of the
 event counters.  The event counters are useful to avoid polling by
 delaying a poll until something has changed.  The values are decimal
 numbers in the range '0' to 'UINT_MAX' and wrapping around to 0.  The
 actual values should not be relied upon; they shall only be used to
 detect a change.
 
    The currently defined counters are:
 'ANY'
      Incremented with any change of any of the other counters.
 'KEY'
      Incremented for added or removed private keys.
 'CARD'
      Incremented for changes of the card readers stati.