88 lines
2.5 KiB
Bash
Executable File
88 lines
2.5 KiB
Bash
Executable File
#!/bin/bash
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# Backup a directory, args come from the environment
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# $1, if it exists, contains a list of declarations
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# Copyright (C) 2019 Carlos Galindo
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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if [ -e "$1" ]; then
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source $1
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fi
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if [ -z "${outDir}" -o -z "${dir}" -o -z "${maxBackups}" -o -z "${service}" \
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-o -z "${name}" ]
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then
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echo "ERROR: Missing data, you need to declare the following:"
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echo "\toutDir: the directory where the backup will be saved"
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echo "\tdir: the directory to back up"
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echo "\tname: the name of the backup"
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echo "\tservice: the service to be stopped (webserver)"
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echo "\tmaxBackups: the number of backups to keep (0 = infinite)"
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exit 1
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fi
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if [ "$(id -u)" != "0" ]
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then
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echo "ERROR: this script has to be run as root!"
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exit 1
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fi
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dateDir="${outDir}/$(date +"%Y%m%d_%H%M%S")"
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if [ ! -d "${dateDir}" ]
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then
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mkdir -p "${dateDir}"
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else
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echo "ERROR: the backup directory ${dateDir} already exists!"
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exit 1
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fi
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echo "Begin backup for ${name}, at ${dateDir}"
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echo -n "Stopping service ${service}..."
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systemctl stop "${service}"
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echo " OK"
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trap 'echo -n "Starting service ${service}..."; systemctl start "${service}"; echo " OK"; exit 2' 1 2 3 9 15
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echo -n "Backing up ${name}..."
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tar --preserve-permissions --absolute-names --create --file "${dateDir}/backup.tar.xz" $dir
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pushd "${dateDir}" > /dev/null
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sha256sum * > sha256sums
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popd > /dev/null
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echo " OK"
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echo -n "Starting service ${service}..."
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systemctl start "${service}"
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echo " OK"
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if (( ${maxBackups} != 0 ))
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then
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nrOfBackups=$(ls -l ${outDir} | grep -c ^d)
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if (( ${nrOfBackups} > ${maxBackups} ))
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then
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echo "Removing old backups..."
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ls -t ${outDir} | tail -$(( nrOfBackups - maxBackups )) | while read dirToRemove; do
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echo -n "Deleting ${dirToRemove}..."
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rm -r ${outDir}/${dirToRemove}
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echo " OK"
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done
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fi
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fi
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echo "End of backup for ${name}, at ${dateDir}"
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