Post upgrade script to run after recompiling OpenLDAP server

slapd-post-upgrade.sh

#!/bin/bash
####################################################################################
#
#  Author:         Lucas Halbert <https://www.lhalbert.xyz>
#  Date:           06/12/2018
#  Last Edited:    01/29/2019
#  Version:        2019.01.29
#  Description:    Moves necessary schema and LDIF files from old slapd instance to
#                  newly compiled instance. Fixes permissions as necessary for slapd
#                  to run.
#  License:        BSD 3-Clause License
#
#  Copyright (c) 2018, Lucas Halbert
#  All rights reserved.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions are met:
#
#  * Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
#
#  * Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and#or other materials provided with the distribution.
#
#  * Neither the name of the copyright holder nor the names of its
#    contributors may be used to endorse or promote products derived from
#    this software without specific prior written permission.
#
#  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
#  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
#  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
#  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
#  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
#  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
#  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
#  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
####################################################################################
#
#  Revisions:   01/29/2019  Replace absolute paths with relative paths. Add
#                           license and commenting.
#
#               06/12/2018  Initial Draft
#
####################################################################################
BASE_PATH="/opt/work"
SCHEMA_FILES=(owncloud.schema owncloud.ldif openssh-ldap.schema rfc2307bis.schema yubikey.schema sudo.schema)
CONFIG_FILES=(slapd.conf slapd.ldif)

# Check if the correct number of arguments have been provided
if [ "$#" -lt 2 ]; then
    echo "ERROR: please provide both the current and upgrade versions as argument 1 and 2 respectively"
    echo "INFO: argument expect versions in the form of '#.#.##'"
    exit 1
elif [ "$#" -eq 2 ]; then
    CURRENT_VERSION=$1
    UPGRADE_VERSION=$2
else
    echo "ERROR: An incorrect number of arguments was provided."
    echo "ERROR: please provide both the current and upgrade versions as argument 1 and 2 respectively"
    echo "INFO: argument expect versions in the form of '#.#.##'"
    exit 1
fi

# Check if slapd is running
SLAPD_PID=$(pidof slapd)
if [ ! -z ${SLAPD_PID} ]; then
    echo "ERROR: slapd process PID# ${SLAPD_PID} detected. Please terminate before running."
    exit 2
else
    echo "INFO: no slapd process detected. proceeding..."
fi

# Check if Current version path exists
if [ ! -d "${BASE_PATH}/openldap-${CURRENT_VERSION}/" ]; then
    echo "ERROR: The current version path does not exist"
    exit 3
else
    echo "INFO: The current version path exists. Proceeding..."
fi

# Check if Upgrade version path exists
if [ ! -d "${BASE_PATH}/openldap-${UPGRADE_VERSION}/" ]; then
    echo "ERROR: The upgrade version path does not exist"
    exit 4
else
    echo "INFO: The upgrade version path exists. Proceeding..."
fi

# Copy third-party schema files to upgrade version location
for i in ${SCHEMA_FILES[*]}; do
    cp -f ${BASE_PATH}/openldap-${CURRENT_VERSION}/etc/openldap/schema/${i} ${BASE_PATH}/openldap-${UPGRADE_VERSION}/etc/openldap/schema/${i}
done

# Copy current version configuration files to upgrade version location
for i in ${CONFIG_FILES[*]}; do
    cp -f ${BASE_PATH}/openldap-${CURRENT_VERSION}/etc/openldap/${i} ${BASE_PATH}/openldap-${UPGRADE_VERSION}/etc/openldap/${i}
    
    # fix ownership
    chown ldap:root ${BASE_PATH}/openldap-${UPGRADE_VERSION}/etc/openldap/${i}
done

# Copy current version var data to upgrade version location
cp -f ${BASE_PATH}/openldap-${CURRENT_VERSION}/var/openldap-data/* ${BASE_PATH}/openldap-${UPGRADE_VERSION}/var/openldap-data/

# Fix ownership of openldap-data
chown -R ldap ${BASE_PATH}/openldap-${UPGRADE_VERSION}/var/openldap-data/

# Fix ownership of run data
chown -R ldap ${BASE_PATH}/openldap-${UPGRADE_VERSION}/var/run/

# Reminder
echo "Don't forget to change the symbolic link for the new version of slapd"