#!/bin/bash
#----------------------------------------------------
# armbian_hotclone.sh
#
# Copies the sdcard your Armbian system is running from 
# to a new sdcard in an USB-attached card reader.  
#
# The new sdcard can be of any size as long as it can hold 
# the data content of the original card.
#
# The cloned card should be tested after creation to ensure
# it can be used for desaster recovery.
#
# c) Rodolfo 2016-06-19	enjoy !
#-----------------------------------------------------
#

ARMBIAN_ORIG=/dev/mmcblk0
ARMBIAN_CLONE="/dev/"$(lsblk -l | grep sd | grep disk | awk '{printf $1}')

# Clone partial image of original SDcard ( bootstuff + partition table + start of first partition )
# we just copy 4M to account for strange partition alignment

dd if=$ARMBIAN_ORIG of=$ARMBIAN_CLONE bs=1M count=4

# Delete invalid partition of target SDCARD and create/format new ext4-partition

umount $ARMBIAN_CLONE"1"
echo -e "p\nd\nn\n\n\n\n\np\nw\nq\n" | fdisk $ARMBIAN_CLONE 
echo -e "y\n" | mkfs.ext4 $ARMBIAN_CLONE"1" 

# Target mount 

mkdir /mnt/armbian_clone
mount $ARMBIAN_CLONE"1" /mnt/armbian_clone
rm -r /mnt/armbian_clone/*		# cleanup lost+found

# System copy to SDcard

time rsync -avSz --exclude=/dev/* --exclude=/proc/* --exclude=/sys/* --exclude=/media/* \
--exclude=/mnt/* --exclude=/run/* --exclude=/tmp/* / /mnt/armbian_clone 

sync

umount $ARMBIAN_CLONE"1"
eject  $ARMBIAN_CLONE