preinst is in lvm2 2.02.133-1ubuntu10.
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 | #!/bin/sh
set -e
case "$1" in
upgrade)
if dpkg --compare-versions "$2" lt 2.02.88-1; then
if [ -d /etc/lvm/cache ]; then
rm -rf /etc/lvm/cache
fi
fi
if dpkg --compare-versions "$2" lt 2.02.122-2; then
if [ -x "/usr/bin/deb-systemd-helper" ]; then
deb-systemd-helper purge lvm2-activation.service lvm2-activation-early.service >/dev/null
deb-systemd-helper unmask lvm2-activation.service lvm2-activation-early.service >/dev/null
fi
fi
;;
esac
exit 0
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