live-build/helpers/lh_binary_rootfs

#!/bin/sh

# lh_binary_rootfs(1) - build rootfs image

set -e

# Source common functions
for FUNCTION in /usr/share/live-helper/functions/*.sh
do
	. ${FUNCTION}
done

# Reading configuration files
Read_conffile config/common
Read_conffile config/image
Set_defaults

# Requiring stage file
Require_stagefile .stage/bootstrap

# Checking lock file
Check_lockfile .lock

# Creating lock file
Create_lockfile .lock

# Checking stage file
Check_stagefile .stage/binary_rootfs

# Creating directory
if [ ! -d binary/casper ]
then
	mkdir -p binary/casper
fi

case "${LIVE_FILESYSTEM}" in
	ext2)
		if [ -f binary/casper/filesystem.ext2 ]
		then
			rm -f binary/casper/filesystem.ext2
		fi

		DU_DIM="`du -ks chroot | cut -f1`"
		REAL_DIM="`expr ${DU_DIM} + ${DU_DIM} / 20`" # Just 5% more to be sure, need something more sophistcated here...

		genext2fs --size-in-blocks=${REAL_DIM} --reserved-blocks=0 --root=chroot binary/casper/filesystem.ext2
		;;

	plain)
		if [ -d binary/casper/filesystem.dir ]
		then
			rm -rf binary/casper/filesystem.dir
		fi

		cd chroot
		find . | cpio -pumd ../binary/casper/filesystem.dir
		cd "${OLDPWD}"
		;;

	squashfs)
		if [ -f binary/casper/filesystem.squashfs ]
		then
			rm binary/casper/filesystem.squashfs
		fi

		if [ "${LIVE_FLAVOUR}" = "minimal" ] || [ "${LIVE_FLAVOUR}" = "mini" ]
		then
			mksquashfs chroot binary/casper/filesystem.squashfs -e chroot/boot/vmlinuz* chroot/boot/initrd.img* chroot/vmlinuz chroot/initrd.img chroot/boot/config-* chroot/boot/System.map-*
		else
			mksquashfs chroot binary/casper/filesystem.squashfs
		fi
		;;
esac

# Creating stage file
Create_stagefile .stage/binary_rootfs