gpg-connect-agent(1)



GPG-CONNECT-AGENT(1)         GNU Privacy Guard 2.1        GPG-CONNECT-AGENT(1)

NAME
       gpg-connect-agent - Communicate with a running agent

SYNOPSIS
       gpg-connect-agent [options][commands]

DESCRIPTION
       The  gpg-connect-agent  is a utility to communicate with a running gpg-
       agent.  It is useful to check out the commands gpg-agent provides using
       the  Assuan  interface.   It  might also be useful for scripting simple
       applications.  Input is expected at stdin and output  gets  printed  to
       stdout.

       It  is  very  similar  to running gpg-agent in server mode; but here we
       connect to a running instance.

       The following options may be used:

       -v
       --verbose
              Output additional information while running.

       -q

       --quiet
              Try to be as quiet as possible.

       --homedir dir
              Set the name of the home directory to dir. If this option is not
              used,  the  home  directory  defaults to '~/.gnupg'.  It is only
              recognized when given on the command line.   It  also  overrides
              any  home  directory  stated  through  the  environment variable
              'GNUPGHOME' or (on Windows systems) by  means  of  the  Registry
              entry HKCU\Software\GNU\GnuPG:HomeDir.

              On Windows systems it is possible to install GnuPG as a portable
              application.  In this case only this command line option is con-
              sidered, all other ways to set a home directory are ignored.

              To install GnuPG as a portable application under Windows, create
              an empty file named 'gpgconf.ctl' in the same directory  as  the
              tool  'gpgconf.exe'.   The root of the installation is then that
              directory; or, if  'gpgconf.exe'  has  been  installed  directly
              below  a  directory named 'bin', its parent directory.  You also
              need to make sure that the following directories exist  and  are
              writable:     'ROOT/home'     for    the    GnuPG    home    and
              'ROOT/var/cache/gnupg' for internal cache files.

       --agent-program file
              Specify the agent program to be started if none is running.  The
              default  value  is determined by running gpgconf with the option
              --list-dirs.  Note that the  pipe  symbol  (|)  is  used  for  a
              regression  test suite hack and may thus not be used in the file
              name.

       --dirmngr-program file
              Specify the directory manager (keyserver client) program  to  be
              started  if  none  is  running.  This has only an effect if used
              together with the option --dirmngr.

       --dirmngr
              Connect  to  a  running  directory  manager  (keyserver  client)
              instead of to the gpg-agent.  If a dirmngr is not running, start
              it.

       -S
       --raw-socket name
              Connect to socket name assuming this is an Assuan style  server.
              Do  not  run  any special initializations or environment checks.
              This may be used to directly connect to any Assuan style  socket
              server.

       -E
       --exec Take  the  rest  of the command line as a program and it's argu-
              ments and execute it as an Assuan server. Here is how you  would
              run gpgsm:
          gpg-connect-agent --exec gpgsm --server
       Note that you may not use options on the command line in this case.

       --no-ext-connect
              When  using  -S  or  --exec,  gpg-connect-agent  connects to the
              Assuan server in extended  mode  to  allow  descriptor  passing.
              This option makes it use the old mode.

       --no-autostart
              Do not start the gpg-agent or the dirmngr if it has not yet been
              started.

       -r file
       --run file
              Run the commands from file at startup and then continue with the
              regular  input method.  Note, that commands given on the command
              line are executed after this file.

       -s
       --subst
              Run the command /subst at startup.

       --hex  Print data lines in a hex format and the ASCII representation of
              non-control characters.

       --decode
              Decode  data  lines.  That is to remove percent escapes but make
              sure that a new line always starts with a D and a space.

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

       /echo args
              Just print args.

       /let name value
              Set the variable name to value.  Variables are only  substituted
              on  the input if the /subst has been used.  Variables are refer-
              enced by prefixing the name with a dollar  sign  and  optionally
              include  the  name  in curly braces.  The rules for a valid name
              are identically to those of the standard bourne shell.  This  is
              not yet enforced but may be in the future.  When used with curly
              braces no leading or trailing white space is allowed.

              If a variable is not found, it is searched  in  the  environment
              and if found copied to the table of variables.

              Variable  functions are available: The name of the function must
              be followed by at least one space and the at least one argument.
              The following functions are available:

              get    Return  a  value  described  by  the argument.  Available
                     arguments are:

                     cwd    The current working directory.

                     homedir
                            The gnupg homedir.

                     sysconfdir
                            GnuPG's system configuration directory.

                     bindir GnuPG's binary directory.

                     libdir GnuPG's library directory.

                     libexecdir
                            GnuPG's library directory for executable files.

                     datadir
                            GnuPG's data directory.

                     serverpid
                            The PID of the current server. Command  /serverpid
                            must have been given to return a useful value.

              unescape args
                     Remove  C-style escapes from args.  Note that \0 and \x00
                     terminate the returned string implicitly.  The string  to
                     be  converted  are  the entire arguments right behind the
                     delimiting space of the function name.

              unpercent args
              unpercent+ args
                     Remove percent style escaping from args.  Note  that  %00
                     terminates  the string implicitly.  The string to be con-
                     verted are the entire arguments right behind the delimit-
                     ing space of the function name. unpercent+ also maps plus
                     signs to a spaces.

              percent args
              percent+ args
                     Escape the args  using  percent  style  escaping.   Tabs,
                     formfeeds,  linefeeds,  carriage  returns  and colons are
                     escaped. percent+ also maps spaces to plus signs.

              errcode arg
              errsource arg
              errstring arg
                     Assume arg is an integer and evaluate  it  using  strtol.
                     Return  the  gpg-error error code, error source or a for-
                     matted string with the error code and error source.

              +
              -
              *
              /
              %      Evaluate all arguments as long integers using strtol  and
                     apply  this operator.  A division by zero yields an empty
                     string.

              !
              |
              &      Evaluate all arguments as long integers using strtol  and
                     apply  the  logical  operators  NOT,  OR or AND.  The NOT
                     operator works on the last argument only.

       /definq name var
              Use content of the variable var for inquiries with  name.   name
              may be an asterisk (*) to match any inquiry.

       /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.

       /datafile name
              Write all data lines from the server to the file name.  The file
              is opened for writing and created if it  does  not  exists.   An
              existing  file is first truncated to 0.  The data written to the
              file fully decoded.  Using a single dash for name writes to std-
              out.   The  file is kept open until a new file is set using this
              command or this command is used without an argument.

       /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.

       /open var file [mode]
              Open  file and assign the file descriptor to var.  Warning: This
              command is experimental and might change in future versions.

       /close fd
              Close the file descriptor fd.  Warning: This command is  experi-
              mental and might change in future versions.

       /showopen
              Show a list of open files.

       /serverpid
              Send  the Assuan command GETINFO pid to the server and store the
              returned PID for internal purposes.

       /sleep Sleep for a second.

       /hex
       /nohex Same as the command line option --hex.

       /decode
       /nodecode
              Same as the command line option --decode.

       /subst
       /nosubst
              Enable and disable variable substitution.  It defaults  to  dis-
              abled  unless the command line option --subst has been used.  If
              /subst as been enabled once, leading whitespace is removed  from
              input lines which makes scripts easier to read.

       /while condition
       /end   These  commands  provide  a  way for executing loops.  All lines
              between the while and the corresponding end are executed as long
              as the evaluation of condition yields a non-zero value or is the
              string true or yes.  The evaluation is done by passing condition
              to the strtol function.  Example:

           /subst
           /let i 3
           /while $i
             /echo loop couter is $i
             /let i ${- $i 1}
           /end

       /if condition
       /end   These  commands  provide  a  way for conditional execution.  All
              lines between the if and the corresponding end are executed only
              if the evaluation of condition yields a non-zero value or is the
              string true or yes.  The evaluation is done by passing condition
              to the strtol function.

       /run file
              Run commands from file.

       /bye   Terminate the connection and the program.

       /help  Print a list of available control commands.

SEE ALSO
       gpg-agent(1), scdaemon(1)

       The full documentation for this tool is maintained as a Texinfo manual.
       If GnuPG and the info program are properly installed at your site,  the
       command

         info gnupg

       should  give  you access to the complete manual including a menu struc-
       ture and an index.

GnuPG 2.2.2                       2017-11-07              GPG-CONNECT-AGENT(1)

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