#!/bin/sh
#
# Password change tool.
#

. /opt/puzzlefw/lib/functions.sh

# Store changed password on the SD card.
store_password() {

    # Lock to avoid conflicting changes.
    lock_config || exit 1

    echo "Writing new password to SD card ..."

    grep "^root:" /etc/shadow > ${CONFIG_DIR}/passwd.conf.new
    sync_config passwd.conf || exit 1
}

if [ $# -ne 0 ]; then
    script="${0##*/}"
    cat <<EOF
Usage: $script

Change root password and write the new password hash to the SD card
to make it persistent accross reboot.
EOF
    exit 1
fi

passwd && store_password