#11: Backup can be cancelled by CTRL+C; prompt for maintenance mode

diff --git a/NextcloudBackup.sh b/NextcloudBackup.sh
index 6cb6b0eb69e4570040d3b992163c8348a8a03f56..f1e591b85cfad282089e32b85c69cebe1047133d 100644 (file)
--- a/NextcloudBackup.sh
+++ b/NextcloudBackup.sh
@@ -3,7 +3,7 @@
 #
 # Bash script for creating backups of Nextcloud.
 # Usage: ./NextcloudBackup.sh
-# 
+#
 # The script is based on an installation of Nextcloud using nginx and MariaDB, see https://decatec.de/home-server/nextcloud-auf-ubuntu-server-18-04-lts-mit-nginx-mariadb-php-lets-encrypt-redis-und-fail2ban/
 #
 
@@ -46,6 +46,32 @@ fileNameBackupDb="nextcloud-db.sql"
 # Function for error messages
 errorecho() { cat <<< "$@" 1>&2; }
 
+function DisableMaintenanceMode() {
+       echo "Switching off maintenance mode..."
+       cd "${nextcloudFileDir}"
+       sudo -u "${webserverUser}" php occ maintenance:mode --off
+       cd ~
+       echo "Done"
+       echo
+}
+
+# Capture CTRL+C
+trap CtrlC INT
+
+function CtrlC() {
+       read -p "Backup cancelled. Keep maintenance mode? [y/n] " -n 1 -r
+       echo
+
+       if ! [[ $REPLY =~ ^[Yy]$ ]]
+       then
+               DisableMaintenanceMode
+       else
+               echo "Maintenance mode still enabled."
+       fi
+
+       exit 1
+}
+
 #
 # Check for root
 #
@@ -116,29 +142,24 @@ echo
 #
 # Disable maintenance mode
 #
-echo "Switching off maintenance mode..."
-cd "${nextcloudFileDir}"
-sudo -u "${webserverUser}" php occ maintenance:mode --off
-cd ~
-echo "Done"
-echo
+DisableMaintenanceMode()
 
 #
 # Delete old backups
 #
 if (( ${maxNrOfBackups} != 0 ))
-then   
+then
        nrOfBackups=$(ls -l ${backupMainDir} | grep -c ^d)
-       
+
        if (( ${nrOfBackups} > ${maxNrOfBackups} ))
        then
                echo "Removing old backups..."
                ls -t ${backupMainDir} | tail -$(( nrOfBackups - maxNrOfBackups )) | while read dirToRemove; do
-               echo "${dirToRemove}"
-               rm -r ${backupMainDir}/${dirToRemove}
-               echo "Done"
-               echo
-    done
+                       echo "${dirToRemove}"
+                       rm -r ${backupMainDir}/${dirToRemove}
+                       echo "Done"
+                       echo
+               done
        fi
 fi