preinst is in samhain 4.1.4-2build1.
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.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | # Preinstall file for samhain
case "$1" in
    install|upgrade)
# If there are files in /var/state from previous version of Samhain
# them move all the files and remove the old directory (deprecated since
# 3.1.0-7)
        if [ -e /var/state/samhain/ ] ; then
            [ ! -e /var/lib/samhain ] && mkdir -p /var/lib/samhain
            mv /var/state/samhain/* /var/lib/samhain
           rmdir /var/state/samhain/ || true
        fi
    ;;
    abort-upgrade)
    ;;
    *)
        echo "preinst called with unknown argument \`$1'" >&2
        exit 0
        ;;
esac
exit 0
 |