Backup FreeNAS configuration file

freenas_config_backup.sh

#!/bin/sh -

set -e

SRC_FILE="/data/freenas-v1.db"
DEST_DIR="/mnt/ztank/backup/freenas_backup"
FILENAME_FORMAT="`hostname`-`sed 's: .*::;s:FreeNAS-:freenas:;s:\.::g;s:-RELEASE:r:' /etc/version`"
DEST_FILENAME="${FILENAME_FORMAT}-`date +%Y%m%d`.db"
DEST_FILENAME_HOUR="${FILENAME_FORMAT}-`date +%Y%m%d.%H`.db"
OLD_FILENAME="${FILENAME_FORMAT}-`date -j -v -2m +%Y%m%d`.db"
OLD_FILENAME_HOUR="${FILENAME_FORMAT}-`date -j -v -1d +%Y%m%d.%H`.db"

# Back it up
if [ -f "${SRC_FILE}" ]; then
        cp "${SRC_FILE}" "${DEST_DIR}/${DEST_FILENAME_HOUR}"
        chmod 644 "${DEST_DIR}/${DEST_FILENAME_HOUR}"
        rm -f "${DEST_DIR}/${DEST_FILENAME}"
        cp -p "${DEST_DIR}/${DEST_FILENAME_HOUR}" "${DEST_DIR}/${DEST_FILENAME}"
fi

# Yesterday's hourly filenames, wipe them out
if [ -f "${DEST_DIR}/${OLD_FILENAME_HOUR}" ]; then
        rm "${DEST_DIR}/${OLD_FILENAME_HOUR}"
fi

# Old daily filenames, wipe most of them
if [ -f "${DEST_DIR}/${OLD_FILENAME}" ]; then
        if [ `date +%w` -gt 0 ]; then
                rm "${DEST_DIR}/${OLD_FILENAME}"
        fi
fi

exit 0