This file is indexed.

preinst is in shorewall-lite 5.1.12.2-1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

The actual contents of the file can be viewed below.

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#!/bin/sh -e

case "$1" in
    upgrade)
        # if we are upgrading from version < 3.4 then we have to rename the
        # configuration file
        if [ "$2" ] && dpkg --compare-versions "$2" lt "3.4"
        then
            if [ -f /etc/shorewall-lite/shorewall.conf ]
            then
                ln /etc/shorewall-lite/shorewall.conf /etc/shorewall-lite/shorewall-lite.conf
            fi
        fi
        ;;
    *)
        ;;
esac