prerm is in kpartx 0.6.4-5+deb9u1.
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 27 28 29 | #! /bin/sh
set -e
case "$1" in
install)
;;
remove|purge)
;;
upgrade|failed-upgrade)
if dpkg --compare-versions "$2" lt "0.5.0+git1.656f8865-7"; then
[ -e /var/lib/dpkg/info/kpartx.prerm ] && rm /var/lib/dpkg/info/kpartx.prerm
fi
;;
abort-upgrade)
;;
*)
echo "preinst called with unknown argument \`$1'" >&2
exit 1
;;
esac
exit 0
|