molecules/scripts/mkloopcard.sh
2012-01-27 23:31:57 +01:00

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#! /bin/sh
# (c) Copyright 2012 Fabio Erculiani <lxnay@sabayon.org>
# Licensed under terms of GPLv2
env-update
. /etc/profile
export LC_ALL=C
# Expected env variables:
# PATHS_TO_REMOVE = ";" separated list of paths to rm -rf
# PATHS_TO_EMPTY = ";" separated list of paths to rm -rf (keeping the dir)
# RELEASE_STRING
# RELEASE_VERSION
# RELEASE_DESC
# RELEASE_FILE
# IMAGE_NAME
# DESTINATION_IMAGE_DIR
# PACKAGES_TO_ADD
# PACKAGES_TO_REMOVE
if [ ${#} -ne 5 ]; then
echo "usage: ${0} <path to regular file containing the image> <size in Mb> <source boot files dir> <source chroot>"
exit 1
fi
CHROOT_SCRIPT="${1}"
if [ ! -x "${CHROOT_SCRIPT}" ]; then
echo "${CHROOT_SCRIPT} is not executable"
exit 1
fi
FILE="${2}"
SIZE="${3}"
BOOT_DIR="${4}"
CHROOT_DIR="${5}"
# Should we make a tarball of the rootfs and bootfs?
MAKE_TARBALL="${MAKE_TARBALL:-1}"
cleanup_loopbacks() {
cd /
sync
sync
sleep 5
sync
[[ -n "${tmp_file}" ]] && rm "${tmp_file}" 2> /dev/null
[[ -n "${tmp_dir}" ]] && { umount "${tmp_dir}" &> /dev/null; rmdir "${tmp_dir}" &> /dev/null; }
sleep 1
[[ -n "${vfat_part}" ]] && losetup -d "${vfat_part}" 2> /dev/null
[[ -n "${ext_part}" ]] && losetup -d "${ext_part}" 2> /dev/null
[[ -n "${DRIVE}" ]] && losetup -d "${DRIVE}" 2> /dev/null
}
trap "cleanup_loopbacks" 1 2 3 6 9 14 15 EXIT
# Erase the file
echo "Generating the empty image file at ${FILE}"
dd if=/dev/zero of="${FILE}" bs=1024000 count="${SIZE}"
[[ "$?" != "0" ]] && exit 1
DRIVE=$(losetup -f "${FILE}" --show)
if [ -z "${DRIVE}" ]; then
echo "Cannot execute losetup for $FILE"
exit 1
fi
echo "Configured the loopback partition at ${DRIVE}"
# Calculate size using fdisk
SIZE=$(fdisk -l "${DRIVE}" | grep Disk | grep bytes | awk '{print $5}')
CYLINDERS=$((SIZE/255/63/512))
# Magic first partition size, given 9 cylinders below
MAGICSIZE="73995264"
STARTOFFSET="32256"
echo "Disk size : ${SIZE} bytes"
echo "Disk cyls : ${CYLINDERS}"
echo "Magic size : ${MAGICSIZE} bytes (boot part size)"
echo "Start offset : ${STARTOFFSET} bytes"
# this will create a first partition that is 73995264 bytes long
# Starts at sect 63, ends at sect 144584, each sector is 512bytes
# In fact it creates 9 cyls
{
echo ,9,0x0C,*
echo ,,,-
} | sfdisk -D -H 255 -S 63 -C $CYLINDERS $DRIVE
sleep 2
# The second partiton will start at block 144585, get the end block
ENDBLOCK=$(fdisk -l "${DRIVE}" | grep "${DRIVE}p2" | awk '{print $3}')
EXTSIZE=$(((ENDBLOCK - 144585) * 512))
# Get other two loopback devices first
EXTOFFSET=$((STARTOFFSET + MAGICSIZE))
echo "ExtFS size : ${EXTSIZE} bytes"
echo "ExtFS offset : ${EXTOFFSET} bytes"
# Get other two loopback devices first
vfat_part=$(losetup -f --offset "${STARTOFFSET}" --sizelimit "${MAGICSIZE}" "${FILE}" --show)
if [ -z "${vfat_part}" ]; then
echo "Cannot setup the vfat partition loopback"
exit 1
fi
ext_part=$(losetup -f --offset "${EXTOFFSET}" --sizelimit "${EXTSIZE}" "${FILE}" --show)
if [ -z "${ext_part}" ]; then
echo "Cannot setup the ext3 partition loopback"
exit 1
fi
echo "VFAT Partiton at : ${vfat_part}"
echo "ExtFS Partition at : ${ext_part}"
# Format vfat
echo "Formatting VFAT ${vfat_part}..."
mkfs.vfat -n "boot" -F 32 "${vfat_part}" || exit 1
# Format extfs
echo "Formatting ExtFS ${ext_part}..."
mkfs.ext3 -L "Sabayon" "${ext_part}" || exit 1
tmp_dir=$(mktemp -d)
if [[ -z "${tmp_dir}" ]]; then
echo "Cannot create temporary dir"
exit 1
fi
chmod 755 "${tmp_dir}" || exit 1
sleep 2
sync
echo "Setting up the boot directory content, mounting on ${tmp_dir}"
mount "${vfat_part}" "${tmp_dir}"
cp -R "${BOOT_DIR}"/* "${tmp_dir}"/ || exit 1
umount "${tmp_dir}" || exit 1
echo "Setting up the extfs directory content, mounting on ${tmp_dir}"
mount "${ext_part}" "${tmp_dir}"
rsync -a -H -A -X --delete-during "${CHROOT_DIR}"/ "${tmp_dir}"/ --exclude "/proc/*" --exclude "/sys/*" \
--exclude "/dev/pts/*" --exclude "/dev/shm/*" || exit 1
# execute PACKAGES_TO_ADD and PACKAGES_TO_REMOVE
export ETP_NONINTERACTIVE=1
if [ -n "${PACKAGES_TO_ADD}" ]; then
add_cmd="equo install ${PACKAGES_TO_ADD}"
chroot "${tmp_dir}" ${add_cmd} || exit 1
fi
if [ -n "${PACKAGES_TO_REMOVE}" ]; then
rem_cmd="equo remove ${PACKAGES_TO_REMOVE}"
chroot "${tmp_dir}" ${rem_cmd} || exit 1
fi
# execute CHROOT_SCRIPT hook inside chroot
chroot_script_name=$(basename "${CHROOT_SCRIPT}")
target_chroot_script="${tmp_dir}"/"${chroot_script_name}"
cp -p "${CHROOT_SCRIPT}" "${target_chroot_script}" || exit 1
chmod 700 "${target_chroot_script}" || exit 1
chown root "${target_chroot_script}" || exit 1
chroot "${tmp_dir}" "/${chroot_script_name}" || exit 1
rm -f "${target_chroot_script}"
# work out paths to empty and paths to remove
if [ -n "${PATHS_TO_REMOVE}" ]; then
for path in $(echo ${PATHS_TO_REMOVE} | tr ";" "\n"); do
path="${tmp_dir}/${path}"
echo "Removing: ${path}"
rm -rf "${path}"
done
fi
if [ -n "${PATHS_TO_EMPTY}" ]; then
for path in $(echo ${PATHS_TO_EMPTY} | tr ";" "\n"); do
path="${tmp_dir}/${path}"
echo "Emptying: ${path}"
rm -rf "${path}"/*
done
fi
if [ -n "${RELEASE_FILE}" ]; then
release_file="${tmp_dir}"/"${RELEASE_FILE}"
release_dir=$(dirname "${release_file}")
[[ ! -d "${release_dir}" ]] && { mkdir -p "${release_dir}" || exit 1; }
echo "${RELEASE_STRING} ${RELEASE_VERSION} ${RELEASE_DESC}" > "${release_file}"
fi
if [ -n "${DESTINATION_IMAGE_DIR}" ] && [ "${MAKE_TARBALL}" = "1" ]; then
# Create the rootfs tarball
ROOTFS_TARBALL="${DESTINATION_IMAGE_DIR}/${IMAGE_NAME}.rootfs.tar.xz"
echo "Creating the roofs tarball: ${ROOTFS_TARBALL}"
tmp_file=$(mktemp --suffix=.tar.xz)
[[ -z "${tmp_file}" ]] && exit 1
cd "${tmp_dir}" || exit 1
tar --numeric-owner --preserve-permissions --same-owner -cJf "${tmp_file}" ./ || exit 1
mv "${tmp_file}" "${ROOTFS_TARBALL}" || exit 1
chmod 644 "${ROOTFS_TARBALL}" || exit 1
cd "$(dirname "${ROOTFS_TARBALL}")" || exit 1
md5sum "$(basename "${ROOTFS_TARBALL}")" > "$(basename "${ROOTFS_TARBALL}")".md5
# Create the boot dir tarball
BOOTFS_TARBALL="${DESTINATION_IMAGE_DIR}/${IMAGE_NAME}.bootfs.tar.xz"
echo "Creating the bootfs tarball: ${BOOTFS_TARBALL}"
tmp_file=$(mktemp --suffix=.tar.xz)
[[ -z "${tmp_file}" ]] && exit 1
cd "${BOOT_DIR}" || exit 1
tar --numeric-owner --preserve-permissions --same-owner -cJf "${tmp_file}" ./ || exit 1
mv "${tmp_file}" "${BOOTFS_TARBALL}" || exit 1
chmod 644 "${BOOTFS_TARBALL}" || exit 1
cd "$(dirname "${BOOTFS_TARBALL}")" || exit 1
md5sum "$(basename "${BOOTFS_TARBALL}")" > "$(basename "${BOOTFS_TARBALL}")".md5
fi
umount "${tmp_dir}" || exit 1
cleanup_loopbacks
echo "Your MMC image \"${FILE}\" is ready"