build_sd_card.sh

#!/bin/bash

if [ ${EUID} -ne 0 ]; then
  echo "this tool must be run as root"
  exit 1
fi

device=$1
if ! [ -b ${device} ]; then
  echo "${device} is not a block device"
  exit 1
fi

if [ "${deb_local_mirror}" == "" ]; then
  deb_local_mirror=${deb_mirror}
fi

bootsize="64M"

relative_path=`dirname $0`

# locate path of this script
absolute_path=`cd ${relative_path}; pwd`

# cd ${absolute_path}

rootfs="./sdos"
bootfs="./sdboot"

today=`date +%Y%m%d`

image=""

if [ "${device}" == "" ]; then
  echo "no block device given, just creating an image"
  mkdir -p ${buildenv}
  image="./img/openfpgaduino_${today}.img"
  dd if=/dev/zero of=${image} bs=1MB count=3800
  device=`losetup -f --show ${image}`
  echo "image ${image} created and mounted as ${device}"
else
  dd if=/dev/zero of=${device} bs=512 count=1
fi

fdisk ${device} << EOF
n
p
1

+${bootsize}
t
c
n
p
2


w
EOF


if [ "${image}" != "" ]; then
  losetup -d ${device}
  device=`kpartx -va ${image} | sed -E 's/.*(loop[0-9])p.*/\1/g' | head -1`
  device="/dev/mapper/${device}"
  bootp=${device}p1
  rootp=${device}p2
else
  if ! [ -b ${device}1 ]; then
    bootp=${device}p1
    rootp=${device}p2
    if ! [ -b ${bootp} ]; then
      echo "uh, oh, something went wrong, can't find bootpartition neither as ${device}1 nor as ${device}p1, exiting."
      exit 1
    fi
  else
    bootp=${device}1
    rootp=${device}2
  fi
fi

mkfs.vfat ${bootp}
mkfs.ext4 ${rootp}

mkdir -p ${rootfs}

mount ${rootp} ${rootfs}

mkdir -p ${rootfs}/proc
mkdir -p ${rootfs}/sys
mkdir -p ${rootfs}/dev
mkdir -p ${rootfs}/dev/pts
mkdir -p ${rootfs}/usr/src/delivery

mount -t proc none ${rootfs}/proc
mount -t sysfs none ${rootfs}/sys
mount -o bind /dev ${rootfs}/dev
mount -o bind /dev/pts ${rootfs}/dev/pts

sync
sleep 15

# Make sure we're out of the root fs. We won't be able to unmount otherwise, and umount -l will fail silently.
cp -rpf boot/* ${bootfs}/
cp -rpf os/*  ${rootfs}/

umount -l ${bootp}

umount -l ${rootfs}/usr/src/delivery
umount -l ${rootfs}/dev/pts
umount -l ${rootfs}/dev
umount -l ${rootfs}/sys
umount -l ${rootfs}/proc

umount -l ${rootfs}
umount -l ${rootp}

# Remove device mapper bindings. Avoids running out of loop devices if run repeatedly.
dmsetup remove_all

echo "finishing ${image}"

if [ "${image}" != "" ]; then
  kpartx -d ${image}
  echo "created image ${image}"
fi

echo "done."