5.2 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 W32 systems) by means of the Registry entry
HKCU\Software\GNU\GnuPG:HomeDir.
-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
one of:
none- no debugging at all.
basic- some basic debug messages
advanced- more verbose debug messages
expert- even more detailed messages
guru- all of the debug messages you can get
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- This option is only useful for debugging and the behaviour may change at
any time without notice. FLAGS are bit encoded and may be given in
usual C-Syntax. The currently defined bits are:
0 (1)- command I/O
1 (2)- values of big number integers
2 (4)- low level crypto operations
5 (32)- memory allocation
6 (64)- caching
7 (128)- show memory statistics.
9 (512)- write hashed data to files named
dbgmd-000*
10 (1024)- trace Assuan protocol
11 (2048)- trace APDU I/O to the card. This may reveal sensitive data.
--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 options enables it and also changes the working directory to
/tmp when running in --server mode.
--no-detach- Don't detach the process from the console. This is mainly useful for
debugging.
--log-file file- Append all logging output to file. This is very helpful in
seeing what the agent actually does.
--pcsc-driver library- Use library to access the smartcard reader. The current default
is libpcsclite.so. 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).
--ctapi-driver library- Use library to access the smartcard reader. The current default
is libtowitoko.so. Note that the use of this interface is
deprecated; it may be removed in future releases.
--disable-ccid- Disable the integrated support for CCID compliant readers. This
allows to fall back to one of the other drivers even if the internal
CCID driver can handle the reader. Note, that CCID support is only
available if libusb was available at build time.
--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- If n is not 0 and no client is actively using the card, the card
will be powered down after n seconds. Powering down the card
avoids a potential risk of damaging a card when used with certain
cheap readers. This also allows non Scdaemon aware applications to
access the card. The disadvantage of using a card timeout is that
accessing the card takes longer and that the user needs to enter the
PIN again after the next power up.
Note that with the current version of Scdaemon the card is powered
down immediatley at the next timer tick for any value of n other
than 0.
--disable-keypad- Even if a card reader features a keypad, do not try to use it.
--allow-admin--deny-admin- This enables the use of Admin class commands for card applications
where this is supported. Currently we support it for the OpenPGP
card. Deny is the default. This commands is useful to inhibit
accidental access to admin class command which could ultimately lock
the card through wrong PIN numbers.
--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.
All the long options may also be given in the configuration file after
stripping off the two leading dashes.