gnupg: Agent GETINFO

 
 2.6.16 Return information about the process
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 This is a multipurpose function to return a variety of information.
 
      GETINFO WHAT
 
    The value of WHAT specifies the kind of information returned:
 'version'
      Return the version of the program.
 'pid'
      Return the process id of the process.
 'socket_name'
      Return the name of the socket used to connect the agent.
 'ssh_socket_name'
      Return the name of the socket used for SSH connections.  If SSH
      support has not been enabled the error 'GPG_ERR_NO_DATA' will be
      returned.