root/trunk/software/rootfs/flash.sh

#!/bin/sh
#
# This script flashes the NAND parition for the root filesystem on the OSWALD
# with a bzipped tarball of a root filesystem found on the second partition of
# the inserted SD card in the root directory.

# Exit if any command exits with a non-zero status
set -o errexit

trap errorhandler 0 1 2 3 15

errorhandler() {
        echo -e "\n"
        echo "WARNING: An error may have occurred while flashing"
        echo "the NAND with the new root filesystem. The SD card"
        echo "may be bad if the untarring process segfaulted or"
        echo "the system might not have tar installed with bzip2"
        echo "support if the process never started."
        if [ -n "$(grep /media/nand /proc/mounts)" ] ; then
                umount /media/nand
        fi
        exit 1
}

flash_eraseall -j /dev/mtd4
[ -d /media/nand ] || mkdir /media/nand
mount -t jffs2 /dev/mtdblock4 /media/nand
tar jxvf /media/mmcblk0p2/rootfs.tar.bz2 -C /media/nand
umount /media/nand
echo "default-on" > /sys/class/leds/oswaldboard\:\:usr/trigger
echo "SUCCESS: The device has been flashed with a new"
echo "root filesystem. The SD card should now be "
echo "removed before turning off the device."