PK

#!/usr/bin/env bash

# -------------------------------------------------------------------------- #
# Copyright 2002-2021, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# 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 -e

# THIS IS A CONTEXTUALIZATION GUARD
if [ "$1" != 'local' ] ; then
    exit 0
fi

# Umount the directory and remove it
cleanup()
{
    [ "$MOUNTED" = "yes" ] && umount -l "${ROOTFS_DIR}"
    rm -r "${TMP_DIR}"
}

if [ "${RECREATE_RUN^^}" = "YES" ] && [ "$(uname -s)" = 'Linux' ]; then
    # Detection of real run-time variable data directory in case there
    # would be images with (unusual) reverse symlink /run -> /var/run
    if [ -d /run ] && ! [ -L /run ]; then
       RUN_DIR=/run
    elif [ -d /var/run ] && ! [ -L /var/run ]; then
       RUN_DIR=/var/run
    else
       # this shouldn't happen
       echo 'ERROR: No suitable run-time data directory in image!' >&2
       exit 1
    fi

    ###

    TMP_DIR=$(mktemp -d "/tmp/one-context.XXXXXX")
    ROOTFS_DIR="${TMP_DIR}/rootfs"
    trap cleanup EXIT
    chmod 0700 "${TMP_DIR}"
    mkdir "${ROOTFS_DIR}"

    mount --bind -o ro,nodev,noexec,nosuid / "${ROOTFS_DIR}"
    MOUNTED=yes

    # copy, but don't overwrite
    # NOTE: using -i </dev/null is a workaround for silly cp in busybox without -n support
    cp -aiv "${ROOTFS_DIR}/${RUN_DIR}" "$(dirname "${RUN_DIR}")" 2>/dev/null </dev/null
fi

PK 99