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A few of the compile-time defaults may be overridden at run-time by using environment variables. The following variables are supported.
SHISHI_CONFIG
Specify the location of the default system configuration file. Used
by the Shishi library. If not specified, the default is specified at
compile-time and is usually $prefix/etc/shishi.conf.
SHISHI_HOME
Specify the user specific directory for configuration files, ticket
cache, etc. Used by the Shishi library. If not specified, it is
computed as $HOME/.shishi.
SHISHI_USER
Specify the default principal user name. Used by the Shishi library.
If not specified, it is taken from the environment variable
USER.
SHISHI_TICKETS
Specify the file name of the ticket cache. Used by the Shishi
library. If not specified, it will be $SHISHI_HOME/tickets, or
$HOME/.shishi/tickets if $SHISHI_HOME is not specified.