#!/bin/sh
# This script can be called in the following ways:
#
# Before the package is installed:
# <new-preinst> install
#
# Before removed package is upgraded:
# <new-preinst> install <old-version>
#
# Before the package is upgraded:
# <new-preinst> upgrade <old-version>
#
#
# If postrm fails during upgrade or fails on failed upgrade:
# <old-preinst> abort-upgrade <new-version>

set -e

rm_conffile() {
local PKGNAME="$1"
local CONFFILE="$2"

[ -e "$CONFFILE" ] || return 0

local md5sum="$(md5sum $CONFFILE | sed -e 's/ .*//')"
local old_md5sum="$(dpkg-query -W -f='${Conffiles}' $PKGNAME | \
sed -n -e "\' $CONFFILE ' { s/ obsolete$//; s/.* //; p }")"
if [ "$md5sum" != "$old_md5sum" ]; then
echo "Obsolete conffile $CONFFILE has been modified by you."
echo "Saving as $CONFFILE.dpkg-bak ..."
mv -f "$CONFFILE" "$CONFFILE".dpkg-bak
else
echo "Removing obsolete conffile $CONFFILE ..."
rm -f "$CONFFILE"
fi
}

case "$1" in
install|upgrade)
if dpkg --compare-versions "$2" lt "0.6.9-4"; then
rm_conffile wpasupplicant /etc/logrotate.d/wpa_supplicant
rm_conffile wpasupplicant /etc/logrotate.d/wpa_action
fi
if dpkg --compare-versions "$2" lt "0.6.10-1"; then
rm_conffile wpasupplicant /etc/init.d/wpa-ifupdown
update-rc.d -f wpa-ifupdown remove >/dev/null
fi
;;
abort-upgrade)
;;
*)
echo "$0 called with unknown argument \`$1'" 1>&2
exit 1
;;
esac



exit 0