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2.6.15 Return information about the process

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.