preinst is in postgresql-10 10.6-0ubuntu0.18.04.1.
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.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | #!/bin/sh
set -e
MAJOR_VER="${DPKG_MAINTSCRIPT_PACKAGE#postgresql-}"
CATVERSION="201707211" # set by override_dh_installdeb
case $1 in
install|upgrade)
if [ "$2" ]; then
. /usr/share/postgresql-common/maintscripts-functions
preinst_check_catversion "$MAJOR_VER" "$CATVERSION"
fi ;;
esac
exit 0
|