gnupg: Agent GET_CONFIRMATION

 
 2.6.10 Ask for confirmation
 ---------------------------
 
 This command may be used to ask for a simple confirmation by presenting
 a text and 2 buttons: Okay and Cancel.
 
        GET_CONFIRMATION DESCRIPTION
 
    DESCRIPTIONis displayed along with a Okay and Cancel button.  Blanks
 must be percent escaped or replaced by '+'.  A 'X' may be used to
 display confirmation dialog with a default text.
 
    The agent either returns with an error or with a OK. Note, that the
 length of DESCRIPTION is implicitly limited by the maximum length of a
 command.