uck-remaster-mount

#!/bin/bash

###################################################################################
# UCK - Ubuntu Customization Kit                                                  #
# Copyright (C) 2006-2010 UCK Team                                                #
#                                                                                 #
# UCK 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 3 of the License, or               #
# (at your option) any later version.                                             #
#                                                                                 #
# UCK 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 UCK.  If not, see <http://www.gnu.org/licenses/>.                    #
###################################################################################

SOURCE="$1"
REMASTER_HOME="$2"

#############################
# general purpose functions #
#############################

function usage()
{
	echo "Usage: $0 source.iso [remaster-dir]"
	exit 1
}

function failure()
{
	echo "$@"
	exit 1
}

#########################
# input parameter check #
#########################

if [ -z "$REMASTER_HOME" ]; then
	REMASTER_HOME=~/tmp
fi

if [ -z "$SOURCE" ]; then
	usage
fi

########
# main #
########

. libraries/remaster-live-cd.sh 2>/dev/null ||
	. /usr/lib/uck/remaster-live-cd.sh 2>/dev/null ||
	failure "libraries not found"

check_union_mounts ||
	failure "Cannot use union mounts - no OS support found"

# Check arguments
case "$REMASTER_HOME" in
/*)	: ok - has absolute path;;
*)	failure "remaster-dir argument must be absolute path";;
esac

# Mount r/w copy of iso
if mountpoint "$REMASTER_HOME/remaster-iso"; then
	: do nothing - is already mounted
else
	union_mount "$SOURCE" "$REMASTER_HOME/remaster-iso" ||
		failure "Can't union_mount $REMASTER_HOME/remaster-iso"
fi

# Mount r/W copy of rootfs on iso
if mountpoint "$REMASTER_HOME/remaster-root"; then
	: do nothing - is already mounted
else
	union_mount "$REMASTER_HOME/remaster-iso-mount/casper/filesystem.squashfs" \
			"$REMASTER_HOME/remaster-root" ||
		failure "Can't union_mount $REMASTER_HOME/remaster-root"
fi