script to backup address book on os x

#!/bin/bash

# Backup addressbook on OS X to a specified folder

BACKUP_TARGET_DIR="$HOME/Dropbox/Backups"

# There should be no reason to change this
BACKUP_SOURCE_DIR="$HOME/Library/Application Support/Addressbook"

# If you want you can change the name of the backup (folder)
BACKUP_NAME="`date +%Y-%m-%d_%H.%M.%S`.abbu"

E_CD=86 # Can't change folder

# validate backup target dir
cd $BACKUP_TARGET_DIR

if [ `pwd` != "$BACKUP_TARGET_DIR" ]
    then
    echo "Can't change to backup target folder $BACKUP_TARGET_DIR. Does it exist?"
    exit $E_CD
fi

mkdir -p "$BACKUP_TARGET_DIR/$BACKUP_NAME"

cd "$BACKUP_TARGET_DIR/$BACKUP_NAME"

if [ `pwd` != "$BACKUP_TARGET_DIR/$BACKUP_NAME" ]
then
  echo "Can't change to backup folder $BACKUP_TARGET_DIR/$BACKUP_NAME"
  exit $E_CD
fi

# Copy from $BACKUP_SOURCE_DIR

# files
# cp "$BACKUP_SOURCE_DIR/AddressBook-v22.abcddb" .
sqlite3 "$BACKUP_SOURCE_DIR/AddressBook-v22.abcddb" ".backup AddressBook-v22.abcddb"
cp "$BACKUP_SOURCE_DIR/Configuration.plist" .

# folders
cp -r "$BACKUP_SOURCE_DIR/Images" .
cp -r "$BACKUP_SOURCE_DIR/Metadata" .