For example: if the software installed is at a version less than 6.14 then take an action, else return 0?
preinst:
Code: Select all
set -e
case "$1" in
install|upgrade)
# if version installed <6.14 then do something else return 0
;;
abort-upgrade)
/bin/true
;;
*)
echo "preinst called with unknown argument \`$1'" >&2
exit 1
;;
esac
exit 0