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#!/bin/sh
# lh_losetup - wrapper around losetup
# Copyright (C) 2006-2007 Daniel Baumann <daniel@debian.org>
#
# live-helper comes with ABSOLUTELY NO WARRANTY; for details see COPYING.
# This is free software, and you are welcome to redistribute it
# under certain conditions; see COPYING for details.
set -e
# Source common functions
for FUNCTION in /usr/share/live-helper/functions/*.sh
do
. ${FUNCTION}
done
# Set static variables
DESCRIPTION="wrapper around losetup"
HELP=""
USAGE="${PROGRAM} <device> <file> <partition>"
Arguments "${@}"
Echo_debug "Init ${PROGRAM}"
# Reading configuration files
Read_conffile config/bootstrap
Read_conffile config/chroot
Read_conffile config/common
Read_conffile config/image
Set_defaults
Breakpoint "losetup: Init"
if [ -z "${1}" ]
then
DEVICE="`${LH_ROOT_COMMAND} ${LH_LOSETUP} -f`"
else
DEVICE="${1}"
fi
FILE="${2}"
PARTITION="${3}"
${LH_ROOT_COMMAND} ${LH_LOSETUP} "${DEVICE}" "${FILE}"
FDISK_OUT="`fdisk -l -u ${DEVICE} 2>&1`"
${LH_ROOT_COMMAND} ${LH_LOSETUP} -d "${DEVICE}"
LOOPDEVICE="`echo ${DEVICE}p${PARTITION:=1}`"
CYL=`echo "$FDISK_OUT" | sed -ne "s_^$LOOPDEVICE[ *]*\([0-9]*\).*_\1_p"`
#OFFSET="`expr 512 '*' ${CYL}`"
OFFSET="$((CYL*512))"
echo loop $DEVICE at offset $OFFSET
if [ "${PARTITION}" = "0" ]
then
${LH_ROOT_COMMAND} ${LH_LOSETUP} "${DEVICE}" "${FILE}"
else
${LH_ROOT_COMMAND} ${LH_LOSETUP} -o "${OFFSET}" "${DEVICE}" "${FILE}"
fi
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