H1_under_Qemu: create_SD_image.sh

#!/bin/bash
# 
# Create SD disk image for hackable 1
#
# GPL v2  copyright Geert Stappers 2009
#
# files to use:
FAT1=${FAT1:=h1-fat_partition.tgz}
OTHER1=${OTHER1:=h1-ext2_partition-rev2.tar.gz}

# SD image to create
SDIMG=h1-sd.img

# log destination
BUCKET=${BUCKET:=/dev/null}

# check available
if [ ! -r ${FAT1} -o ! -r ${OTHER1} ] ; then
  echo 1>&2 File ${FAT1} or file ${OTHER1} not readable \(not available\),
  echo 1>&2 Build or download those files.
  exit 1
fi

if [ -d /tmp/mntpnth1p1 ] ; then
  echo 1>&2  Mount point /tmp/mntpnth1p1 allready exists
  exit 2
fi

if [ -d /tmp/mntpnth1p2 ] ; then
  echo 1>&2  Mount point /tmp/mntpnth1p2 allready exists
  exit 3
fi

if [ `id -u` -ne 0 ] ; then
  echo 1>&2 You should be root to run this script
  echo 1>&2 '( it is because `losetup` and `mount` require root privilege)'
  exit 4
fi

LPDV=$( losetup --find )
if [ -z "$LPDV" ] ; then
  echo 1>&2 No loopdevice found
  exit 5
fi

losetup $LPDV $SDIMG
if [ $? ] ; then
  echo Information from \'losetup\':  $(losetup --all | grep $LPDV) >> $BUCKET
else
  echo 1>&2 "losetup $LPDV $SDIMG failed ..."
  exit 6
fi

# All tests done that could spoil the actual actions

echo -n Creating an one gigabyte file ...
dd if=/dev/zero of=${SDIMG} bs=1024k count=1024 2>> $BUCKET
echo ' done.'

echo -n Partitioning ...
fdisk $LPDV << MY_PARTED >> $BUCKET 2>&1
n
p
1

+8M
n
p
2


w
MY_PARTED
echo ' done.'
echo Partion table >> $BUCKET
fdisk -l $LPDV >> $BUCKET

kpartx -av $LPDV >> $BUCKET
LP=$( basename $LPDV )

mkfs -t ext2 /dev/mapper/${LP}p1 >> $BUCKET 2>&1
mkfs -t ext2 /dev/mapper/${LP}p2 >> $BUCKET 2>&1

mkdir /tmp/mntpnth1p1
mkdir /tmp/mntpnth1p2

mount /dev/mapper/${LP}p1 /tmp/mntpnth1p1
mount /dev/mapper/${LP}p2 /tmp/mntpnth1p2

echo The timestamp warning from \'tar\' can be safely ignored >> $BUCKET
tar xzf ${FAT1}   -C /tmp/mntpnth1p1 >> $BUCKET 2>&1

echo -n Extracting a lot of files .....
tar xzf ${OTHER1} -C /tmp/mntpnth1p2
echo ' done.'

echo -n Unmounting ...
umount /tmp/mntpnth1p1
umount /tmp/mntpnth1p2
echo ' done.'

echo -n Running \'fsck\' ...
fsck -t ext2 -y /dev/mapper/${LP}p2 >> $BUCKET 2>&1
echo ' done.'

echo -n Removal mount points ...
rmdir /tmp/mntpnth1p1
rmdir /tmp/mntpnth1p2
echo ' done.'

echo -n Final cleanup ...
kpartx -d $LPDV
losetup -d $LPDV
echo ' done.'
# last line