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#!/bin/sh
# This script is meant to be used by binary packages pre-installation.
# Variables between @ symbols are replaced by CMake at configure time.
configFiles="@INSTALLED_CONFIG_FILES@"
backupNamesFile=/tmp/bro_install_backups
# Checks if a config file exists in a default location and makes a backup
# so that a modified version is not clobbered
backupFile () {
origFile="$1"
if [ -e ${origFile} ]; then
# choose a file suffix that doesn't already exist
ver=1
while [ -e ${origFile}.${ver} ]; do
ver=$(( ver + 1 ))
done
backupFile=${origFile}.${ver}
cp -p ${origFile} ${backupFile}
# the post upgrade script will check whether the installed
# config file actually differs from existing version
# and delete unnecessary backups
echo "${backupFile}" >> ${backupNamesFile}
fi
}
for file in ${configFiles}; do
backupFile "${file}"
done
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