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Environment-variables.md

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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
  • 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
  • PKCS11SPY_OUTPUT
  • 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.