File: gnupg.info,  Node: Scdaemon Options,  Next: Card applications,  Prev: Scdaemon Commands,  Up: Invoking SCDAEMON

6.2 Option Summary
==================

'--options FILE'
     Reads configuration from FILE instead of from the default per-user
     configuration file.  The default configuration file is named
     'scdaemon.conf' and expected in the '.gnupg' directory directly
     below the home directory of the user.

'--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
     considered, all other ways to set a home directory are ignored.

'-v'
'--verbose'
     Outputs additional information while running.  You can increase the
     verbosity by giving several verbose commands to 'gpgsm', such as
     '-vv'.

'--debug-level LEVEL'
     Select the debug level for investigating problems.  LEVEL may be a
     numeric value or a keyword:

     'none'
          No debugging at all.  A value of less than 1 may be used
          instead of the keyword.
     'basic'
          Some basic debug messages.  A value between 1 and 2 may be
          used instead of the keyword.
     'advanced'
          More verbose debug messages.  A value between 3 and 5 may be
          used instead of the keyword.
     'expert'
          Even more detailed messages.  A value between 6 and 8 may be
          used instead of the keyword.
     'guru'
          All of the debug messages you can get.  A value greater than 8
          may be used instead of the keyword.  The creation of hash
          tracing files is only enabled if the keyword is used.

     How these messages are mapped to the actual debugging flags is not
     specified and may change with newer releases of this program.  They
     are however carefully selected to best aid in debugging.

          Note: All debugging options are subject to change and thus
          should not be used by any application program.  As the name
          says, they are only used as helpers to debug problems.

'--debug FLAGS'
     Set debug flags.  All flags are or-ed and FLAGS may be given in C
     syntax (e.g.  0x0042) or as a comma separated list of flag names.
     To get a list of all supported flags the single word "help" can be
     used.  This option is only useful for debugging and the behavior
     may change at any time without notice.

'--debug-all'
     Same as '--debug=0xffffffff'

'--debug-wait N'
     When running in server mode, wait N seconds before entering the
     actual processing loop and print the pid.  This gives time to
     attach a debugger.

'--debug-ccid-driver'
     Enable debug output from the included CCID driver for smartcards.
     Using this option twice will also enable some tracing of the T=1
     protocol.  Note that this option may reveal sensitive data.

'--debug-disable-ticker'
     This option disables all ticker functions like checking for card
     insertions.

'--debug-allow-core-dump'
     For security reasons we won't create a core dump when the process
     aborts.  For debugging purposes it is sometimes better to allow
     core dump.  This option enables it and also changes the working
     directory to '/tmp' when running in '--server' mode.

'--debug-log-tid'
     This option appends a thread ID to the PID in the log output.

'--debug-assuan-log-cats CATS'
     Changes the active Libassuan logging categories to CATS.  The value
     for CATS is an unsigned integer given in usual C-Syntax.  A value
     of 0 switches to a default category.  If this option is not used
     the categories are taken from the environment variable
     'ASSUAN_DEBUG'.  Note that this option has only an effect if the
     Assuan debug flag has also been with the option '--debug'.  For a
     list of categories see the Libassuan manual.

'--no-detach'
     Don't detach the process from the console.  This is mainly useful
     for debugging.

'--listen-backlog N'
     Set the size of the queue for pending connections.  The default is
     64.  This option has an effect only if '--multi-server' is also
     used.

'--log-file FILE'
     Append all logging output to FILE.  This is very helpful in seeing
     what the agent actually does.  Use 'socket://' to log to socket.

'--pcsc-shared'
     Use shared mode to access the card via PC/SC. This is a somewhat
     dangerous option because Scdaemon assumes exclusive access to the
     card and for example caches certain information from the card.  Use
     this option only if you know what you are doing.

'--pcsc-driver LIBRARY'
     Use LIBRARY to access the smartcard reader.  The current default on
     Unix is 'libpcsclite.so' and on Windows 'winscard.dll'.  Instead of
     using this option you might also want to install a symbolic link to
     the default file name (e.g.  from 'libpcsclite.so.1').  A Unicode
     file name may not be used on Windows.

'--disable-ccid'
     The integrated CCID driver for CCID compliant devices can be
     available when libusb was detected at build time, and it is used to
     access the smartcard reader.  If access via PC/SC driver is needed,
     please configure this option to disable CCID driver support (if
     any).  In GnuPG 2.2, there was a fallback mechanism from CCID
     driver to PC/SC driver.  The fallback mechanism worked, because
     scdaemon in GnuPG 2.2 only supported a single token/reader.  To
     support of multiple tokens/readers at the same time, fallback
     mechanism was removed.

'--reader-port NUMBER_OR_STRING'
     This option may be used to specify the port of the card terminal.
     A value of 0 refers to the first serial device; add 32768 to access
     USB devices.  The default is 32768 (first USB device).  PC/SC or
     CCID readers might need a string here; run the program in verbose
     mode to get a list of available readers.  The default is then the
     first reader found.

     To get a list of available CCID readers you may use this command:
            echo scd getinfo reader_list \
              | gpg-connect-agent --decode | awk '/^D/ {print $2}'

'--card-timeout N'
     This option is deprecated.  In GnuPG 2.0, it used to be used for
     DISCONNECT command to control timing issue.  Since DISCONNECT
     command works synchronously, it has no effect.

'--enable-pinpad-varlen'
     Please specify this option when the card reader supports variable
     length input for pinpad (default is no).  For known readers (listed
     in ccid-driver.c and apdu.c), this option is not needed.  Note that
     if your card reader doesn't supports variable length input but you
     want to use it, you need to specify your pinpad request on your
     card.

'--disable-pinpad'
     Even if a card reader features a pinpad, do not try to use it.

'--deny-admin'
     This option disables the use of admin class commands for card
     applications where this is supported.  Currently we support it for
     the OpenPGP card.  This option is useful to inhibit accidental
     access to admin class command which could ultimately lock the card
     through wrong PIN numbers.  Note that GnuPG versions older than
     2.0.11 featured an '--allow-admin' option which was required to use
     such admin commands.  This option has no more effect today because
     the default is now to allow admin commands.

'--disable-application NAME'
     This option disables the use of the card application named NAME.
     This is mainly useful for debugging or if a application with lower
     priority should be used by default.

'--application-priority NAMELIST'
     This option allows one to change the order in which applications of
     a card a tried if no specific application was requested.  NAMELIST
     is a space or comma delimited list of application names.  Unknown
     names are simply skipped.  Applications not mentioned in the list
     are put in the former order at the end of the new priority list.

     To get the list of current active applications, use
              gpg-connect-agent 'scd getinfo app_list' /bye

   All the long options may also be given in the configuration file
after stripping off the two leading dashes.