magneticore

#!/bin/bash

IMG="$1"

if [[ -e $IMG ]]; then
	P_START=$( fdisk -lu $IMG | grep Linux | awk '{print $2}' ) # Start of 2nd partition in 512 byte sectors
	P_SIZE=$(( $( fdisk -lu $IMG | grep Linux | awk '{print $3}' ) * 1024 )) # Partition size in bytes
	losetup /dev/loop2 $IMG -o $(($P_START * 512)) --sizelimit $P_SIZE
	fsck -f /dev/loop2
	resize2fs -M /dev/loop2 # Make the filesystem as small as possible