initial commit

src/backbitdir

@@ -0,0 +1,72 @@
+#!/bin/bash
+
+# Backup a directory, args come from the environment
+# $1, if it exists, contains a list of declarations
+
+if [ -e $1 ]; then
+    source $1
+fi
+
+if [ -z "${outDir}" -o -z "${dir}" -o -z "${maxBackups}" -o -z "${service}" \
+       	-o -z "${name}" ]
+then
+    echo "ERROR: Missing data, you need to declare the following:"
+    echo "\toutDir: the directory where the backup will be saved"
+    echo "\tdir: the directory to back up"
+    echo "\tname: the name of the backup"
+    echo "\tservice: the service to be stopped (webserver)"
+    echo "\tmaxBackups: the number of backups to keep (0 = infinite)"
+    exit 1
+fi
+
+if [ "$(id -u)" != "0" ]
+then
+   echo "ERROR: this script has to be run as root!"
+   exit 1
+fi
+
+dateDir="${outDir}/$(date +"%Y%m%d_%H%M%S")"
+
+if [ ! -d "${dateDir}" ]
+then
+    mkdir -p "${dateDir}"
+else
+    echo "ERROR: the backup directory ${dateDir} already exists!"
+    exit 1
+fi
+
+echo "Begin backup for ${name}, at ${dateDir}"
+
+echo -n "Stopping service ${service}..."
+systemctl stop "${service}"
+echo " OK"
+
+trap 'echo -n "Starting service ${service}..."; systemctl start "${service}"; echo " OK"; exit 2' 1 2 3 9 15
+
+echo -n "Backing up ${name}..."
+tar --preserve-permissions --absolute-names --create --file "${dateDir}/backup.tar.xz" $dir
+pushd "${dateDir}" > /dev/null
+sha256sum * > sha256sums
+popd > /dev/null
+echo " OK"
+
+echo -n "Starting service ${service}..."
+systemctl start "${service}"
+echo " OK"
+
+if (( ${maxBackups} != 0 ))
+then
+    nrOfBackups=$(ls -l ${outDir} | grep -c ^d)
+
+    if (( ${nrOfBackups} > ${maxBackups} ))
+    then
+        echo "Removing old backups..."
+        ls -t ${outDir} | tail -$(( nrOfBackups - maxBackups )) | while read dirToRemove; do
+            echo -n "Deleting ${dirToRemove}..."
+            rm -r ${outDir}/${dirToRemove}
+            echo " OK"
+        done
+    fi
+fi
+
+echo "End of backup for ${name}, at ${dateDir}"