microsoft.wsusoffline/OPSI/preinst

#!/bin/bash
#
# preinst script
# This script executes before that package will be unpacked from its archive file.
#
# The following environment variables can be used to obtain information about the current installation:
#   PRODUCT_ID, PRODUCT_TYPE, PRODUCT_VERSION, PACKAGE_VERSION, CLIENT_DATA_DIR, DEPOT_ID

TMP_DIR=${CLIENT_DATA_DIR}/../${PRODUCT_ID}.tmp

if [ -d $TMP_DIR ]; then
	echo "Temporary directory $TMP_DIR already exist, aborting!" 1>&2
	exit 1
fi

[ ! -d $CLIENT_DATA_DIR ] && mkdir $CLIENT_DATA_DIR
mkdir $TMP_DIR

if [ -d $CLIENT_DATA_DIR ]; then
	echo "Saving previous directories..."
	for dirname in client; do
		for path in $CLIENT_DATA_DIR/$dirname; do
			if [ -e $path ]; then
				echo "   moving $path to $TMP_DIR"
				mv $path $TMP_DIR/ || exit 1
			fi
		done
	done
fi

exit 0