#!/bin/sh

set -e



# Remove a no-longer used conffile
rm_conffile() {
    PKGNAME="$1"
    CONFFILE="$2"
    if [ -e "$CONFFILE" ]; then
        md5sum="`md5sum \"$CONFFILE\" | sed -e \"s/ .*//\"`"
        old_md5sum="`dpkg-query -W -f='${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" "$CONFFILE".dpkg-bak
        else
	    if [ "$CONFFILE" = "/etc/acpi/events/powerbtn" -a -e /etc/acpi/powerbtn.sh.dpkg-bak ]; then
		# we need some special logic for /etc/acpi/events/powerbtn because it might
		# be kept because it was changed itself or because /etc/acpi/powerbtn.sh was changed
		echo "Obsolete conffile $CONFFILE saved as $CONFFILE.dpkg-bak ..."
		sed -e 's#/etc/acpi/powerbtn.sh#/etc/acpi/powerbtn.sh.dpkg-bak#' < "$CONFFILE" > "$CONFFILE".dpkg-bak
	    else
		echo "Removing obsolete conffile $CONFFILE ..."
	    fi
	    rm -f "$CONFFILE"
        fi
    fi
}