Controlling gpg-connect-agent - Using the GNU Privacy Guard
Description: Using the GNU Privacy Guard

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#### 7.8.2 Control commands.

While reading Assuan commands, gpg-agent also allows a few special commands to control its operation. These control commands all start with a slash (`/`).

`/echo` args
  Just print args.
`/definqfile` name file
  Use content of file for inquiries with name. name may be an asterisk (`*` to match any inquiry.
`/definqprog` name prog
  Run prog for inquiries matching name and pass the entire line to it as command line arguments
`/showdef`
  Print all definitions
`/cleardef`
  Delete all definitions
`/sendfd` file mode
  Open file in mode (which needs to be a valid `fopen` mode string) and send the file descriptor to the server. This is usually followed by a command like `INPUT FD` to set the input source for other commands.
`/recvfd`
  Not yet implemented.
`/hex`
`/nohex`
  Same as the command line option `--hex`.
`/decode`
`/nodecode`
  Same as the command line option `--decode`.
`/help`
  Print a list of available control commands.