Mity CPU Platforms » MitySOM-5CSX Altera Cyclone V

#!/bin/bash

# must run this script with sudo, requires root privileges

if [ "$(id -u)" != "0" ]; then

	echo "Sorry, you are not root."

	exit 1

fi

# get all paths needed

source ./set_altera.sh

pushd ${DELIVERABLESDIR}

image_file=${DELIVERABLESDIR}/mitysom5csx_sensis.img

# create the reference SDCARD image

rm -rf ${image_file}

# 500 MB image is plenty for now

dd if=/dev/zero of=${image_file} bs=1 seek=500M count=0 >/dev/null 2>&1

RETVAL=$?

# exit on failure

if [ "$RETVAL" -ne "0" ]; then

  echo "????? dd failed @ Return value: $RETVAL ?????"

  popd > /dev/null

  exit $RETVAL

fi

# find the next available loop device and assign to loop (ex: /dev/loop0 /dev/loop1)

loop=`losetup -f`

# attach loop device to the image file

# ex: losetup /dev/loop0 image_file.img

losetup ${loop} ${image_file}

RETVAL=$?

# exit on failure

if [ "$RETVAL" -ne "0" ]; then

  echo "????? losetup ${loop} failed @ Return value: $RETVAL ?????"

  popd > /dev/null

  exit $RETVAL

fi

# create partition table

IMAGE_SIZE=$((1024 * 1024 * 1024))

# root filesystem (ext) 83 = linux

RFS_TYPE=83

RFS_NUM=1

RFS_SIZE=$((512 * 1024 * 1024))

RFS_OFFSET=$((4 * 1024 * 1024))

# create partions using fdisk on the loop device

cat <<EOT | fdisk ${loop}

c

u 

p

n

p

${RFS_NUM}

$((${RFS_OFFSET}/512))

+$((${RFS_SIZE}/1024))K

t

${RFS_TYPE}

p

w

EOT

RETVAL=$?

# exit on failure

#if [ "$RETVAL" -ne "0" ]; then

#  echo "????? fdisk ${loop} failed @ Return value: $RETVAL ?????"

#  popd > /dev/null

#  exit $RETVAL

#fi

sync

RETVAL=$?

# exit on failure

if [ "$RETVAL" -ne "0" ]; then

  echo "????? sync failed @ Return value: $RETVAL ?????"

  popd > /dev/null

  exit $RETVAL

fi

losetup -d ${loop}

RETVAL=$?

# exit on failure

if [ "$RETVAL" -ne "0" ]; then

  echo "????? losetup -d ${loop} failed @ Return value: $RETVAL ?????"

  popd > /dev/null

  exit $RETVAL

fi

# populate the filesystem

loop=`losetup -f`

losetup ${loop} -o ${RFS_OFFSET} --sizelimit ${RFS_SIZE} ${image_file}

mkfs -t ext3 ${loop}

# remove mount point directory to expand the root ball

rm -rf ./mnt

# make mount point for root ball

mkdir ./mnt

# mount the directory for the roo ball to the image file

mount -t ext3 ${loop} ./mnt

# move to the mnt directory/image file

pushd ./mnt > /dev/null

# untar the root ball into the image file

tar xvzf ${DELIVERABLESDIR}/core-image-sensis-mitysom-5csx.tar.gz

popd > /dev/null

find ./mnt | wc

umount ${loop}

losetup -d ${loop}

rm -rf ./mnt

popd > /dev/null