reconfigured to use bashup.sh for common code

README.md

@@ -25,14 +25,14 @@ cd /usr/local/src/
 wget https://git.stack-source.com/msb/bashup/archive/master.tar.gz -O bashup.tar.gz
 tar zxvf bashup.tar.gz
 cd bashup
-cp bashup-*.sh /usr/local/sbin/
+cp bashup*.sh /usr/local/sbin/
-chmod 755 /usr/local/sbin/bashup-*.sh
+chmod 755 /usr/local/sbin/bashup*.sh
-chown root:root /usr/local/sbin/bashup-*.sh
+chown root:root /usr/local/sbin/bashup*.sh
-nano /usr/local/etc/bashup.cnf
+nano /usr/local/sbing/bashup.cnf
 crontab -e
 ```
 
-The "nano /usr/local/etc/bashup.cnf" command is optional. Do this if you need to override any of the settings found at the top of the various bashup scripts.
+The "nano /usr/local/sbin/bashup.cnf" command is optional. Do this if you need to override any of the configurable settings found at the top of the script.
 
 For the crontab add an entry for each of the "backup" scripts that you'd like to run. For example, to back up files at 3:01 am every day add this crontab:
 

bashup-backup-files.sh

@@ -4,99 +4,11 @@
 # https://git.stack-source.com/msb/bashup
 # MIT License Copyright (c) 2021 Matthew Saunders Brown
 
-# retention vars
+# load include file
-retention_years=0;
+source $(dirname $0)/bashup.sh
-retention_months=3;
-retention_weeks=5;
-retention_days=7;
-# backup storage directory
-backup_storage_dir='/mnt/backups';
-# directories to be backed up
-backup_dirs=('/etc' '/home' '/srv' '/root' '/usr/local' '/var/www');
 
-# check for local config, which can be used to override any of the above
+bashup::set_existing_backups
-if [[ -f /usr/local/etc/bashup.cnf ]]; then
+bashup::set_retention_array
-  source /usr/local/etc/bashup.cnf
-fi
-
-# require root
-if [ "${EUID}" -ne 0 ]; then
-  echo "This script must be run as root"
-  exit 1
-fi
-
-if [ ! -d $backup_storage_dir ]; then
-  echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
-  exit 1
-fi
-
-# check if backup_storage_dir is a mount in fstab
-grep -qs " $backup_storage_dir " /etc/fstab
-if [ $? -eq 0 ]; then
-  # check if backup_storage_dir is already mounted
-  grep -qs " $backup_storage_dir " /proc/mounts
-  if [ $? -ne 0 ]; then
-    # attempt to mount backups
-    mount $backup_storage_dir
-    # re-check for backups mount
-    grep -qs " $backup_storage_dir " /proc/mounts
-    if [ $? -ne 0 ]; then
-      echo "ERROR: failed to mount $backup_storage_dir"
-      exit 1
-    fi
-  fi
-fi
-
-# set more vars based on above settings
-today=$(date +%Y%m%d)
-existing_backups=($(ls $backup_storage_dir|grep -v lost+found))
-# remove today from existing backups, if it exists. we do other checks later to avoid re-doing backups
-if [[ " ${existing_backups[@]} " =~ " ${today} " ]]; then
-  unset 'existing_backups[-1]';
-fi
-
-# create retention array
-declare -a retention_array
-
-# set retention days
-if [ $retention_days -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_days ]; do
-    DATE=`date --date="$i day ago" +%Y%m%d`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
-
-# set retention weeks
-if [ $retention_weeks -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_weeks ]; do
-    i=$[$i+1]
-    DATE=`date --date="sunday - $i week" +%Y%m%d`
-    retention_array[$DATE]="$DATE"
-  done
-fi
-
-# set retention months
-if [ $retention_months -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_months ]; do
-    DATE=`date --date="$i month ago" +%Y%m01`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
-
-# set retention years
-if [ $retention_years -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_years ]; do
-    DATE=`date --date="$i year ago" +%Y0101`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
 
 # create backup for today
 if [[ " ${retention_array[@]} " =~ " ${today} " ]]; then
@@ -180,11 +92,7 @@ for existing_backup in "${existing_backups[@]}"; do
 
 done
 
-# check if backup_storage_dir is mounted and unmount if so
+bashup::unmount_storage_dir
-grep -qs " $backup_storage_dir " /proc/mounts
-if [ $? -eq 0 ]; then
-  umount $backup_storage_dir
-fi
 
 exit 0
 

bashup-backup-mysql.sh

@@ -4,103 +4,11 @@
 # https://git.stack-source.com/msb/bashup
 # MIT License Copyright (c) 2021 Matthew Saunders Brown
 
-# retention vars
+# load include file
-retention_years=0;
+source $(dirname $0)/bashup.sh
-retention_months=3;
-retention_weeks=5;
-retention_days=7;
-# backup storage directory
-backup_storage_dir='/mnt/backups';
-# mysql config file that contains 'host' 'user' 'password' vars
-defaults_extra_file='/etc/mysql/debian.cnf';
-# list of databases to skip
-exclusions=('information_schema' 'performance_schema' 'sys' 'wsrep');
 
-# check for local config, which can be used to override any of the above
+bashup::set_existing_backups
-if [[ -f /usr/local/etc/bashup.cnf ]]; then
+bashup::set_retention_array
-  source /usr/local/etc/bashup.cnf
-fi
-
-# require root
-if [ "${EUID}" -ne 0 ]; then
-  echo "This script must be run as root"
-  exit 1
-fi
-
-if [ ! -d $backup_storage_dir ]; then
-  echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
-  exit 1
-fi
-
-# check if backup_storage_dir is a mount in fstab
-grep -qs " $backup_storage_dir " /etc/fstab
-if [ $? -eq 0 ]; then
-  # check if backup_storage_dir is already mounted
-  grep -qs " $backup_storage_dir " /proc/mounts
-  if [ $? -ne 0 ]; then
-    # attempt to mount backups
-    mount $backup_storage_dir
-    # re-check for backups mount
-    grep -qs " $backup_storage_dir " /proc/mounts
-    if [ $? -ne 0 ]; then
-      echo "ERROR: failed to mount $backup_storage_dir"
-      exit 1
-    fi
-  fi
-fi
-
-# get todays date (backup dir name)
-today=$(date +%Y%m%d)
-
-# get list of existing backups
-existing_backups=($(ls $backup_storage_dir|grep -v lost+found))
-# remove today from existing backups, if it exists. we do other checks later to avoid re-doing backups
-if [[ " ${existing_backups[@]} " =~ " ${today} " ]]; then
-  unset 'existing_backups[-1]';
-fi
-
-# create retention array
-declare -a retention_array
-
-# set retention days
-if [ $retention_days -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_days ]; do
-    DATE=`date --date="$i day ago" +%Y%m%d`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
-
-# set retention weeks
-if [ $retention_weeks -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_weeks ]; do
-    i=$[$i+1]
-    DATE=`date --date="sunday - $i week" +%Y%m%d`
-    retention_array[$DATE]="$DATE"
-  done
-fi
-
-# set retention months
-if [ $retention_months -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_months ]; do
-    DATE=`date --date="$i month ago" +%Y%m01`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
-
-# set retention years
-if [ $retention_years -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_years ]; do
-    DATE=`date --date="$i year ago" +%Y0101`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
 
 # create backup for today
 if [[ " ${retention_array[@]} " =~ " ${today} " ]]; then
@@ -162,10 +70,6 @@ for existing_backup in "${existing_backups[@]}"; do
 
 done
 
-# check if backup_storage_dir is mounted and unmount if so
+bashup::unmount_storage_dir
-grep -qs " $backup_storage_dir " /proc/mounts
-if [ $? -eq 0 ]; then
-  umount $backup_storage_dir
-fi
 
-exit 0;
+exit 0

bashup-backup-pdns.sh

@@ -4,99 +4,11 @@
 # https://git.stack-source.com/msb/bashup
 # MIT License Copyright (c) 2021 Matthew Saunders Brown
 
-# retention vars
+# load include file
-retention_years=0;
+source $(dirname $0)/bashup.sh
-retention_months=3;
-retention_weeks=5;
-retention_days=7;
-# backup storage directory
-backup_storage_dir='/mnt/backups';
 
-# check for local config, which can be used to override any of the above
+bashup::set_existing_backups
-if [[ -f /usr/local/etc/bashup.cnf ]]; then
+bashup::set_retention_array
-  source /usr/local/etc/bashup.cnf
-fi
-
-# require root
-if [ "${EUID}" -ne 0 ]; then
-  echo "This script must be run as root"
-  exit 1
-fi
-
-if [ ! -d $backup_storage_dir ]; then
-  echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
-  exit 1
-fi
-
-# check if backup_storage_dir is a mount in fstab
-grep -qs " $backup_storage_dir " /etc/fstab
-if [ $? -eq 0 ]; then
-  # check if backup_storage_dir is already mounted
-  grep -qs " $backup_storage_dir " /proc/mounts
-  if [ $? -ne 0 ]; then
-    # attempt to mount backups
-    mount $backup_storage_dir
-    # re-check for backups mount
-    grep -qs " $backup_storage_dir " /proc/mounts
-    if [ $? -ne 0 ]; then
-      echo "ERROR: failed to mount $backup_storage_dir"
-      exit 1
-    fi
-  fi
-fi
-
-# get todays date (backup dir name)
-today=$(date +%Y%m%d)
-
-# get list of existing backups
-existing_backups=($(ls $backup_storage_dir|grep -v lost+found))
-# remove today from existing backups, if it exists. we do other checks later to avoid re-doing backups
-if [[ " ${existing_backups[@]} " =~ " ${today} " ]]; then
-  unset 'existing_backups[-1]';
-fi
-
-# create retention array
-declare -a retention_array
-
-# set retention days
-if [ $retention_days -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_days ]; do
-    DATE=`date --date="$i day ago" +%Y%m%d`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
-
-# set retention weeks
-if [ $retention_weeks -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_weeks ]; do
-    i=$[$i+1]
-    DATE=`date --date="sunday - $i week" +%Y%m%d`
-    retention_array[$DATE]="$DATE"
-  done
-fi
-
-# set retention months
-if [ $retention_months -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_months ]; do
-    DATE=`date --date="$i month ago" +%Y%m01`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
-
-# set retention years
-if [ $retention_years -gt 0 ]; then
-  i="0"
-  while [ $i -lt $retention_years ]; do
-    DATE=`date --date="$i year ago" +%Y0101`
-    retention_array[$DATE]="$DATE"
-    i=$[$i+1]
-  done
-fi
 
 # create backup for today
 if [[ " ${retention_array[@]} " =~ " ${today} " ]]; then
@@ -151,10 +63,6 @@ for existing_backup in "${existing_backups[@]}"; do
 
 done
 
-# check if backup_storage_dir is mounted and unmount if so
+bashup::unmount_storage_dir
-grep -qs " $backup_storage_dir " /proc/mounts
-if [ $? -eq 0 ]; then
-  umount $backup_storage_dir
-fi
 
-exit 0;
+exit 0

bashup-list-backups.sh

@@ -4,21 +4,8 @@
 # https://git.stack-source.com/msb/bashup
 # MIT License Copyright (c) 2021 Matthew Saunders Brown
 
-# backups are stored here
+# load include file
-backup_storage_dir='/mnt/backups';
+source $(dirname $0)/bashup.sh
-# directories that are backed up as part of files
-backup_dirs=('/etc' '/home' '/srv' '/root' '/usr/local' '/var/www');
-
-# check for local config, which can be used to override any of the above
-if [[ -f /usr/local/etc/bashup.cnf ]]; then
-  source /usr/local/etc/bashup.cnf
-fi
-
-# require root
-if [ "${EUID}" -ne 0 ]; then
-  echo "This script must be run as root"
-  exit 1
-fi
 
 help()
 {
@@ -64,29 +51,6 @@ while getopts "b:c:h" opt; do
   esac
 done
 
-
-if [ ! -d $backup_storage_dir ]; then
-  echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
-  exit 1
-fi
-
-# check if backup_storage_dir is a mount in fstab
-grep -qs " $backup_storage_dir " /etc/fstab
-if [ $? -eq 0 ]; then
-  # check if backup_storage_dir is already mounted
-  grep -qs " $backup_storage_dir " /proc/mounts
-  if [ $? -ne 0 ]; then
-    # attempt to mount backups
-    mount $backup_storage_dir
-    # re-check for backups mount
-    grep -qs " $backup_storage_dir " /proc/mounts
-    if [ $? -ne 0 ]; then
-      echo "ERROR: failed to mount $backup_storage_dir"
-      exit 1
-    fi
-  fi
-fi
-
 if [ ! -z "$backup" ]; then
   if [ -d "$backup_storage_dir/$backup" ]; then
     if [ ! -z "$category" ]; then
@@ -131,10 +95,6 @@ else
   ls -1 $backup_storage_dir | grep -v lost+found
 fi
 
-# check if backup_storage_dir is mounted and unmount if so
+bashup::unmount_storage_dir
-grep -qs " $backup_storage_dir " /proc/mounts
-if [ $? -eq 0 ]; then
-  umount $backup_storage_dir
-fi
 
 exit 0

bashup-restore-files.sh

@@ -4,21 +4,8 @@
 # https://git.stack-source.com/msb/bashup
 # MIT License Copyright (c) 2021 Matthew Saunders Brown
 
-# backup storage directory
+# load include file
-backup_storage_dir='/mnt/backups';
+source $(dirname $0)/bashup.sh
-# directories to be backed up
-backup_dirs=('/etc' '/home' '/srv' '/root' '/usr/local' '/var/www');
-
-# check for local config, which can be used to override any of the above
-if [[ -f /usr/local/etc/bashup.cnf ]]; then
-  source /usr/local/etc/bashup.cnf
-fi
-
-# require root
-if [ "${EUID}" -ne 0 ]; then
-  echo "This script must be run as root"
-  exit 1
-fi
 
 help()
 {
@@ -61,30 +48,7 @@ while getopts "b:p:h" opt; do
   esac
 done
 
-if [ ! -d $backup_storage_dir ]; then
+bashup::set_existing_backups
-  echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
-  exit 1
-fi
-
-# check if backup_storage_dir is a mount in fstab
-grep -qs " $backup_storage_dir " /etc/fstab
-if [ $? -eq 0 ]; then
-  # check if backup_storage_dir is already mounted
-  grep -qs " $backup_storage_dir " /proc/mounts
-  if [ $? -ne 0 ]; then
-    # attempt to mount backups
-    mount $backup_storage_dir
-    # re-check for backups mount
-    grep -qs " $backup_storage_dir " /proc/mounts
-    if [ $? -ne 0 ]; then
-      echo "ERROR: failed to mount $backup_storage_dir"
-      exit 1
-    fi
-  fi
-fi
-
-# get list of backups (dates)
-existing_backups=($(ls $backup_storage_dir|grep -v lost+found))
 
 # prompt if backup was not set on command line
 if [ -z "$backup" ] ; then
@@ -164,10 +128,6 @@ fi
 "To restore $pathtorestore from $backup run this command:"
 echo "/usr/bin/rsync -vn --archive --numeric-ids --one-file-system --delete $pathtobackup $pathtorestore"
 
-# check if backup_storage_dir is mounted and unmount if so
+bashup::unmount_storage_dir
-/usr/bin/grep -qs " $backup_storage_dir " /proc/mounts
-if [ $? -eq 0 ]; then
-  /usr/bin/umount $backup_storage_dir
-fi
 
 exit 0

bashup-restore-mysql.sh

@@ -4,21 +4,8 @@
 # https://git.stack-source.com/msb/bashup
 # MIT License Copyright (c) 2021 Matthew Saunders Brown
 
-# backup directory
+# load include file
-backup_storage_dir='/mnt/backups';
+source $(dirname $0)/bashup.sh
-# config file that contains [client] config with 'host' 'user' 'password' settings
-defaults_extra_file='/etc/mysql/debian.cnf';
-
-# check for local config, which can be used to override any of the above
-if [[ -f /usr/local/etc/bashup.cnf ]]; then
-  source /usr/local/etc/bashup.cnf
-fi
-
-# require root
-if [ "${EUID}" -ne 0 ]; then
-  echo "This script must be run as root"
-  exit 1
-fi
 
 help()
 {
@@ -61,30 +48,7 @@ while getopts "b:d:h" opt; do
   esac
 done
 
-if [ ! -d $backup_storage_dir ]; then
+bashup::set_existing_backups
-  echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
-  exit 1
-fi
-
-# check if backup_storage_dir is a mount in fstab
-grep -qs " $backup_storage_dir " /etc/fstab
-if [ $? -eq 0 ]; then
-  # check if backup_storage_dir is already mounted
-  grep -qs " $backup_storage_dir " /proc/mounts
-  if [ $? -ne 0 ]; then
-    # attempt to mount backups
-    mount $backup_storage_dir
-    # re-check for backups mount
-    grep -qs " $backup_storage_dir " /proc/mounts
-    if [ $? -ne 0 ]; then
-      echo "ERROR: failed to mount $backup_storage_dir"
-      exit 1
-    fi
-  fi
-fi
-
-# get list of backups (dates)
-existing_backups=($(ls $backup_storage_dir|grep -v lost+found))
 
 # prompt if backup was not set on command line
 if [ -z "$backup" ] ; then
@@ -149,10 +113,6 @@ else
   exit 1
 fi
 
-# check if backup_storage_dir is mounted and unmount if so
+bashup::unmount_storage_dir
-grep -qs " $backup_storage_dir " /proc/mounts
-if [ $? -eq 0 ]; then
-  umount $backup_storage_dir
-fi
 
-exit
+exit 0

bashup-restore-pdns.sh

@@ -4,19 +4,8 @@
 # https://git.stack-source.com/msb/bashup
 # MIT License Copyright (c) 2021 Matthew Saunders Brown
 
-# backup directory
+# load include file
-backup_storage_dir='/mnt/backups';
+source $(dirname $0)/bashup.sh
-
-# check for local config, which can be used to override any of the above
-if [[ -f /usr/local/etc/bashup.cnf ]]; then
-  source /usr/local/etc/bashup.cnf
-fi
-
-# require root
-if [ "${EUID}" -ne 0 ]; then
-  echo "This script must be run as root"
-  exit 1
-fi
 
 help()
 {
@@ -59,30 +48,7 @@ while getopts "b:z:h" opt; do
   esac
 done
 
-if [ ! -d $backup_storage_dir ]; then
+bashup::set_existing_backups
-  echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
-  exit 1
-fi
-
-# check if backup_storage_dir is a mount in fstab
-grep -qs " $backup_storage_dir " /etc/fstab
-if [ $? -eq 0 ]; then
-  # check if backup_storage_dir is already mounted
-  grep -qs " $backup_storage_dir " /proc/mounts
-  if [ $? -ne 0 ]; then
-    # attempt to mount backups
-    mount $backup_storage_dir
-    # re-check for backups mount
-    grep -qs " $backup_storage_dir " /proc/mounts
-    if [ $? -ne 0 ]; then
-      echo "ERROR: failed to mount $backup_storage_dir"
-      exit 1
-    fi
-  fi
-fi
-
-# get list of backups (dates)
-existing_backups=($(ls $backup_storage_dir|grep -v lost+found))
 
 # prompt if backup was not set on command line
 if [ -z "$backup" ] ; then
@@ -147,10 +113,6 @@ else
   exit 1
 fi
 
-# check if backup_storage_dir is mounted and unmount if so
+bashup::unmount_storage_dir
-grep -qs " $backup_storage_dir " /proc/mounts
-if [ $? -eq 0 ]; then
-  umount $backup_storage_dir
-fi
 
-exit
+exit 0

bashup.sh

@@ -0,0 +1,125 @@
+#!/bin/bash
+#
+# Bashup - A set of bash scripts for managing backups.
+# https://git.stack-source.com/msb/bashup
+# MIT License Copyright (c) 2021 Matthew Saunders Brown
+
+#
+# begin configurable vars
+#
+
+# retention vars
+retention_years=0;
+retention_months=3;
+retention_weeks=5;
+retention_days=7;
+
+# backup storage directory
+backup_storage_dir='/mnt/backups';
+
+# directories to be backed up by files
+backup_dirs=('/etc' '/home' '/srv' '/root' '/usr/local' '/var/www');
+
+# mysql config file that contains 'host' 'user' 'password' vars
+defaults_extra_file='/etc/mysql/debian.cnf';
+
+# list of mysql databases to skip
+exclusions=('information_schema' 'performance_schema' 'sys' 'wsrep');
+
+#
+# end configurable vars
+#
+
+# must be root, attempt sudo if need be
+if [ "${EUID}" -ne 0 ]; then
+  exec sudo -u root --shell /bin/bash $0 $@
+fi
+
+# check for backup storage directory and mount if need be
+if [ -d $backup_storage_dir ]; then
+  # check if backup_storage_dir is a mount in fstab
+  grep -qs " $backup_storage_dir " /etc/fstab
+  if [ $? -eq 0 ]; then
+    # check if backup_storage_dir is already mounted
+    grep -qs " $backup_storage_dir " /proc/mounts
+    if [ $? -ne 0 ]; then
+      # attempt to mount backups
+      mount $backup_storage_dir
+      # re-check for backups mount
+      grep -qs " $backup_storage_dir " /proc/mounts
+      if [ $? -ne 0 ]; then
+        echo "ERROR: failed to mount $backup_storage_dir"
+        exit 1
+      fi
+    fi
+  fi
+else
+  echo "ERROR: Backup storage dir ($backup_storage_dir) does not exist."
+  exit 1
+fi
+
+# get todays date (backup dir name)
+today=$(date +%Y%m%d)
+
+# set existing_backups array
+existing_backups=($(ls $backup_storage_dir|grep -v lost+found))
+# if script is a *-backup-* script remove today from existing backups, if it exists. we do other checks avoid re-doing backups
+if [[ "$0" == *"-backup-"* ]];then
+  if [[ " ${existing_backups[@]} " =~ " ${today} " ]]; then
+    unset 'existing_backups[-1]';
+  fi
+fi
+
+function bashup::set_retention_array () {
+
+  declare -a retention_array
+
+  # set retention days
+  if [ $retention_days -gt 0 ]; then
+    i="0"
+    while [ $i -lt $retention_days ]; do
+      DATE=`date --date="$i day ago" +%Y%m%d`
+      retention_array[$DATE]="$DATE"
+      i=$[$i+1]
+    done
+  fi
+
+  # set retention weeks
+  if [ $retention_weeks -gt 0 ]; then
+    i="0"
+    while [ $i -lt $retention_weeks ]; do
+      i=$[$i+1]
+      DATE=`date --date="sunday - $i week" +%Y%m%d`
+      retention_array[$DATE]="$DATE"
+    done
+  fi
+
+  # set retention months
+  if [ $retention_months -gt 0 ]; then
+    i="0"
+    while [ $i -lt $retention_months ]; do
+      DATE=`date --date="$i month ago" +%Y%m01`
+      retention_array[$DATE]="$DATE"
+      i=$[$i+1]
+    done
+  fi
+
+  # set retention years
+  if [ $retention_years -gt 0 ]; then
+    i="0"
+    while [ $i -lt $retention_years ]; do
+      DATE=`date --date="$i year ago" +%Y0101`
+      retention_array[$DATE]="$DATE"
+      i=$[$i+1]
+    done
+  fi
+
+}
+
+function bashup::unmount_storage_dir () {
+  # check if backup_storage_dir is mounted and unmount if so
+  grep -qs " $backup_storage_dir " /proc/mounts
+  if [ $? -eq 0 ]; then
+    umount $backup_storage_dir
+  fi
+}