tripleo-image-elements/elements/use-ephemeral/bin/register-state-path

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#!/bin/bash
#
# Copyright 2013 Hewlett-Packard Development Company, L.P.
# All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
set -eux
set -o pipefail
SCRIPT_NAME=$(basename ${0})
SCRIPT_HOME=$(dirname ${0})
function show_options () {
echo "Usage: ${SCRIPT_NAME} [options] <path>"
echo
echo "Register <path> as a state path."
echo
echo "This will register path as being part of the state of the machine."
echo "If there is content at <path> it will be moved to "
echo "/var/lib/use-ephemeral/<path>."
echo
echo "Paths are recorded in /var/lib/use-ephemeral/stateful-paths."
echo
echo "Options:"
echo " --leave-symlink -- create a symlink from <path> to /mnt/state/<path>."
echo
exit ${1}
}
LEAVE_SYMLINK=""
TEMP=`getopt -o h -l help,leave-symlink -n ${SCRIPT_NAME} -- "$@"`
if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
# Note the quotes around `${TEMP}': they are essential!
eval set -- "${TEMP}"
while true ; do
case "${1}" in
--leave-symlink) LEAVE_SYMLINK="true"; shift 1 ;;
-h | --help) show_options 0;;
--) shift ; break ;;
*) echo "Error: unsupported option ${1}." ; exit 1 ;;
esac
done
STATE_PATH=${1:-""}
EXTRA=${2:-""}
if [ -z "${STATE_PATH}" -o -n "${EXTRA}" ]; then
show_options 1
fi
backup="/var/lib/use-ephemeral"
mkdir -p "${backup}"
echo "${STATE_PATH};${LEAVE_SYMLINK}" >> "${backup}/stateful-paths"