Script tu run Drupal's "drush bb" to scheduled backup location and remove old Backups

drushbackup.sh

#!/bin/sh
#
# backup_migrate is a powerful module to create backups of a drupal database.
# It also has a tight drush integration and supports cron-based scheduled
# backups as well as removal out outdated backups. But you cannot define a
# eliable time frame when to run the backup. So it's possible that the
# scheduled backup runs at highnoon and sets your website into maintenance
# mode for a few seconds. That's where this script jumps in.
# 
# This script runs drush on a set of drupal installations (defined in
# $SITEALIASES) and
#
# 1. creates backup into the scheduled backups folder using the $BAM_PROFILE
#    backup profile
# 2. Removes all backups older than $GRACE_PERIOD days.
#
# Run this script via cron at the time you like and disable the
# scheduled backup_migrate task inside Drupal

SITEALIASES="live beta" # which site aliases should be included
WWWUSER=wwwrun          # which user runs the the apache process
BAM_PROFILE=default     # get the backup profile name with
                        # "drush @alias bam-profiles"
GRACE_PERIOD=4          # After how many days will old backups be removed

# This code comes from http://stackoverflow.com/a/3951175 - 
# Thanks to jilles (http://stackoverflow.com/users/298656/jilles) 
# for this solution
case $GRACE_PERIOD in
    ''|*[!0-9]*) echo "The variable GRACE_PERIOD contains an invalid value: '$GRACE_PERIOD'"; exit 1;;
    *) true ;;
esac

for a in $SITEALIASES
do
  if [ "X$WWWUSER" == "X" -o "X$WWWUSER" == "X$USER" ]
  then
    drush @${a} bam-backup db scheduled $BAM_PROFILE 2> /dev/null
  else
    sudo -u $WWWUSER drush @${a} bam-backup db scheduled $BAM_PROFILE 2> /dev/null
  fi
  DRUPAL_MAJOR_VERSION=$(drush @${a} st "Drupal version" 2>&1 | grep 'Drupal version' | sed -e 's/^[^0-9]*//' -e 's/\..*//')
  ROOT_FOLDER=$(drush @${a} dd | egrep -v '^(X-Powered-By:|Content-type: text/html)' | egrep -v '^\s+$')

  if [ $DRUPAL_MAJOR_VERSION -lt 7 ]
  then
    PRIVATE_FILES_FOLDER=$(drush @${a} vget file_directory_path | awk -F\" '{ if ($1 ~ /file_directory_path/) print $2 }')
  else
    PRIVATE_FILES_FOLDER=$(drush @${a} vget file_private_path | awk -F\" '{ if ($1 ~ /file_private_path/) print $2 }')
  fi

  find  $ROOT_FOLDER/$PRIVATE_FILES_FOLDER/backup_migrate/scheduled/ \
     -name \*.mysql* \
     -ctime +${GRACE_PERIOD} \
     -exec rm "{}" \;
done