Backup files on a Time Capsule to the local machine using rsnapshot.

tc-backup.sh

#!/bin/bash
#
# Backup files on Time Capsule excluding sparseimages
# Needs to be passed [hourly] [daily] [weekly] [monthly]



# --- Variables --- #

# See if the Time Capsule (TC) is currently mounted.
MOUNT_TEST=$( mount | grep -i afp | wc -l | tr -d " " )

# Name of the mountpoint where TC will be mounted
SOURCE="[local mount point of TC]"

# Where the backup will be stored
DESTINATION="[backup destination]"

# These parameters are passed to mount_afp in line 78
AFP_USERNAME=$(id -un) # Use an account on the TC if the TC has separate user accounts
AFP_PASSWORD='[password on TC]'
TC_NAME="[mdns name of TC]"




# --- Mount the Time Capsule --- #

if [[ $MOUNT_TEST != 0 ]]; then

    # Unmount network drive to make sure I can read it to do the backup
    AFP_MOUNTS=$( mount | grep -i afp | /usr/bin/awk '{print $3}' )

    echo "Unmounting $AFP_MOUNTS"
    diskutil unmount force $AFP_MOUNTS

    # If other users on the machine have AFP mounts,
    # then this command needs root privileges in order
    # to unmount them. Add the following to /etc/sudoers:
    # [USERNAME]    ALL = NOPASSWD: /usr/sbin/diskutil

fi

sleep 1 # Allows the directories in /Volumes to be cleaned up

# Log which backup is running
echo "Performing $1 backup of Time Capsule."

# Create mount point if it does not exist
if [ ! -d $SOURCE ]; then
    echo "$(date "+[%d%b%Y %T]") Creating $SOURCE"
    mkdir $SOURCE
fi

# Mount the Time Capsule on $SOURCE
echo "$(date "+[%d%b%Y %T]") Mounting TC on $SOURCE"
mount_afp -i "afp://${AFP_USERNAME}:${AFP_PASSWORD}@${TC_NAME}._afpovertcp._tcp.local/Data" $SOURCE



# --- Do the backup --- #

echo "$(date "+[%d%b%Y %T]") Executing rsnapshot $1"
/usr/local/bin/rsnapshot $1

# Date stamp the rsnapshot backups
/usr/local/bin/datestamp_backups.py

# Unmount the Time Capsule
echo "$(date "+[%d%b%Y %T]") Unmouting $SOURCE"
diskutil unmount force $SOURCE

printf "$(date "+[%d%b%Y %T]") Backup complete\n\n"