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#!/bin/sh
# FILE: umount.crypt -- unmount a dm-crypt encrypted volume
# AUTHOR: W. Michael Petullo <mike@flyn.org>
# DATE: 18 April 2004
#
# Copyright (C) 2004 W. Michael Petullo <mike@flyn.org>
# All rights reserved.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
LOSETUP=/sbin/losetup
CRYPTSETUP=/sbin/cryptsetup
MOUNT=/bin/mount
UMOUNT=/bin/umount
OPTIONS=""
USAGE="dir"
if [ -z "$1" ]; then
echo "${0##*/}: directory to unmount not specified" >&2
fi
if [ ! -d "$1" ]; then
echo "${0##*/}: $1 is not a directory" >&2
exit 1
fi
DMDEVICE=`$MOUNT | grep $1 | awk '{ print $1 }' | sed 's/^\/dev\/mapper\///g'`
# FIXME: blind replacement of _ with / is a bad idea; can't have _ in real path
REALDEVICE=`echo $DMDEVICE | sed 's/_/\//g'`
$UMOUNT "$1"
if [ $? != 0 ]; then
echo "${0##*/}: error unmounting $1" >&2
exit 1
fi
$CRYPTSETUP remove $DMDEVICE
if [ $? != 0 ]; then
echo "${0##*/}: error removing $DMDEVICE" >&2
exit 1
fi
if echo "$REALDEVICE" | grep ^/dev/loop > /dev/null; then
$LOSETUP -d $REALDEVICE
if [ $? != 0 ]; then
echo "${0##*/}: error removing $REALDEVICE" >&2
exit 1
fi
fi
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