recovery-config

#!/bin/sh

# check if script arguments are valid
if [ "$1" != "save" -a "$1" != "reset" ]; then
    # display usage message in case of insufficient or invalid arguments
    echo "Usage: $(basename $0) <save|reset>"
    exit 1
fi

# check mtd state and unlock if needed
if mtd-rw locked; then
    mtd-rw unlock
    relock=1
fi

# check whether to save or reset the current configuration
if [ "$1" == "save" ]; then
    # create archive of the current configuration
    tar czf /tmp/config.tar.gz -C /volatile/upper $(ls /volatile/upper/)
else
    # create an empty configuration archive
    dd if=/dev/zero bs=10240 count=1 2>/dev/null | gzip > /tmp/config.tar.gz
fi

# store the configuration archive to mtd
snapshot_tool config_write &>/dev/null
if [ "$?" != "0" ]; then
    echo "operation failed"
fi

# clean up configuration archive
rm -f /tmp/config.tar.gz

# lock mtd if it was unlocked by this script
if [ "${relock}" == "1" ]; then
    mtd-rw lock
fi