Environment variables

You can set different environment variables to change the behavior of OpenSC:

• HOME
  • The cache directory is set to $HOME/.cache/opensc on Unix.
• OPENSC_CONF
  • Specify an alternative opensc.conf file.
• OPENSC_DEBUG
  • See Using OpenSC.
• OPENSC_DRIVER
  • Specify an driver, that will be used (the same behavior as force_card_driver configuration option in opensc.conf).
• PIV_EXT_AUTH_KEY
  • External authentication key used by PIV cards during initialization.
  • The environment variable must point to either a binary file matching the length of the key or a text file containing the key in the format XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX:XX
• PKCS11SPY
  • See Using OpenSC.
• PKCS11SPY_OUTPUT
  • See Using OpenSC.
• POSIXLY_CORRECT
• TERM
  • Is used to know if the terminal supports color or not. Supported color terminals are: "linux", "xterm", "Eterm", "rxvt", "rxvt-unicode"
• USERPROFILE
  • The cache directory is set to $USERPROFILE/eid-cache/ on Windows.