iscan.prerm.in

#! /bin/sh
#  iscan.prerm -- things to do before package removal
#  Copyright (C) 2008, 2009  SEIKO EPSON CORPORATION
#
#  License: GPLv2+


#DEBHELPER#


STATE_DIR=@DEB_CONFIGURE_LOCALSTATEDIR@/lib/@DEB_SOURCE_PACKAGE@

VERSION=@DEB_VERSION@

SYSCONFDIR=@DEB_CONFIGURE_SYSCONFDIR@

PATH=$PKGLIBDIR:$PATH

# This is a copy of the function of the same name in the postrm script
needs_restore () {
    vers=`dpkg-query --show --showformat='${Version}' libsane-extras`
    status=`dpkg-query --show --showformat='${Status}' libsane-extras \
            | cut -d' ' -f1`
    test x"install" = x"$status" -o x"deinstall" = x"$status" \
    && dpkg --compare-versions "$vers" lt 1.0.19.12 >/dev/null 2>&1
}

case "$1" in

    remove|upgrade)
	if  test -f $STATE_DIR/interpreter; then
	    test -s $STATE_DIR/interpreter || rm $STATE_DIR/interpreter
	fi
	;;

    failed-upgrade|deconfigure)
	;;

    *)
	echo "postinst called with unknown argument \`$1'" >&2
	exit 1
	;;

esac

case "$1" in

    remove)
	if test /etc = "$SYSCONFDIR" && test -e /etc/sane.d/epkowa.conf \
	   && needs_restore; then
	    # comment out any modern keywords so that libsane-extra's
	    # epkowa doesn't choke on them
	    sed -i '/^$/b; /^[ \t]*#/b; /^[ \t]*usb/b; /^[ \t]*scsi/b;
                 /^[ \t]*pio/b; s/\(.*\)/#\1/' /etc/sane.d/epkowa.conf

	    # prevent purging of conf file by making a backup
	    cp /etc/sane.d/epkowa.conf /etc/sane.d/bak.epkowa.conf
	fi
	;;

    upgrade|failed-upgrade|deconfigure)
	;;

    *)
	echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;

esac

exit 0