Modified Script to Backup All partitions of a RaspberryPi. Added incremental rsync.

pibackup

#!/bin/bash



if [[ $1 == "" ]]
then
  echo "You must specify the copy-to device as the first argument"
  echo "You may also specify a source device as the 2nd argument. Default= mmcblk0"
  echo "If you want no prompts and incremental, specify -a as the last argument"
  echo "i.e.: backup sda [nbd0] [-a]"
  echo
  exit
fi

if [[ $2 == "" || $2 == "-a" ]]
then
  source=mmcblk0
else
  source=$2
fi

if [[ "$@" == *"-a"* ]]
then
  echo "Automatic. Source=$source Destination=$1 Incremental"
else
  echo "Type full if overwriting SD card(not incremental)"
  read -t 5 full
fi


# unmount any partitions on the target device
devdir="dev"

a=9
while [ $a -gt 0 ]
do
  sudo umount /$devdir/$1$a 2>/dev/null
  a=`expr $a - 1`
done

src=$(mktemp -d)
dst=$(mktemp -d)

if [[ $full == "full" ]]
then
  # wipe the FAT on the target

  sudo dd if=/dev/zero of=/$devdir/$1 bs=512 count=1

  # prepare mount points

  # find the last partition on the source

  line=$(sudo parted /dev/${source} unit s print | tail -n 2 | head -n -1)
  lastpnum=$(echo $line | cut -d ' ' -f 1)

  # prepare the new FAT

  sudo parted /$devdir/$1 mklabel msdos

fi


# mirror the partitions on ${source}

sudo parted /dev/${source} unit s print | tail -n +8 | head -n -1 | while read line ; do
pnum=$(echo $line | cut -d ' ' -f 1)
ppnum=$pnum
if [[ $1 = *"nbd"* ]]
then
  ppnum="p$pnum"
fi
start=$(echo $line | cut -d ' ' -f 2)
end=$(echo $line | cut -d ' ' -f 3)
type=$(echo $line | cut -d ' ' -f 5)
fstype=$(echo $line | cut -d ' ' -f 6)
flags=$(echo $line | cut -d ' ' -f 7)
if [[ "$type" == "extended" && $full == "full" ]]; then
  sudo parted /$devdir/$1 -- mkpart extended $start -1s
elif [[ "$type" != "extended" && $full == "full" ]]; then
  if [ "$pnum" == "$lastpnum" ]; then
    sudo parted /$devdir/$1 -- mkpart $type $fstype $start -1s
  else
    sudo parted /$devdir/$1 mkpart $type $fstype $start $end
  fi
  sudo partprobe

  # create file systems

  if [ "$fstype" == "fat32" ] || [ "$fstype" == "fat16" ]; then
    sudo mkfs.fat /$devdir/$1$ppnum
  fi
  if [ "$fstype" == "ext4" ]; then
    sudo mkfs.ext4 -F /$devdir/$1$ppnum
  fi
fi
  if [ "$flags" == "lba" ]; then
    sudo parted /$devdir/$1 set $pnum lba on
  else
    sudo parted /$devdir/$1 set $pnum lba off
  fi
partitions="$(cat /proc/partitions|awk '{print $4}')"
if echo "$partitions"|grep $1$ppnum 
then 
  # mount and copy
  echo "Mounting: /$devdir/$1$ppnum $dst"
  sudo mount /$devdir/$1$ppnum $dst
  sudo mount /dev/${source}p$pnum $src
  sudo rsync -aP --inplace --delete --exclude $src --exclude $dst $src/. $dst/.
  sudo umount $dst
  sudo umount $src
else
  echo
  echo "!!!!!!!!!!!!!!!!!!!"
  echo "Matching partiton $1$ppnum doesn\'t exist on target."
  echo "You must run a FULL backup."
  echo 
  break
fi
done
rmdir $src
rmdir $dst