resquash

#!/bin/bash

. /etc/rc.conf
. /etc/rc.d/functions
SQUASH_ROOT=/squashed

if [[ -z $1 ]] || [[ ! -d ${SQUASH_ROOT}/$1 ]]; then
	echo "Invalid target or none specified. Valid targets are: "
	squashes=($(ls $SQUASH_ROOT))
	echo -e "\n  Used\tDir\n ---------------"
	for dir in ${squashes[*]}; do
		echo -e "  $(du -sh ${SQUASH_ROOT}/${dir}/rw 2> /dev/null | cut -d\/ -f1)${dir}"
	done
	echo
	exit 1
fi

if [[ $UID -ne 0 ]]; then
	sudo $0 $*
	exit
fi

stat_busy "Squashing /${1}"
 mksquashfs /$1 ${SQUASH_ROOT}/${1}/${1}_tmp.sfs -b 65536 || exit 1
stat_done

stat_busy "Unmounting old UnionFS"
 umount -l /${1}
 umount -l -d ${SQUASH_ROOT}/${1}/ro
stat_done

stat_busy "Replacing with new SquashFS"
 rm ${SQUASH_ROOT}/${1}/${1}.sfs
 mv ${SQUASH_ROOT}/${1}/${1}{_tmp,}.sfs
 rm -rf ${SQUASH_ROOT}/${1}/rw/*
stat_done

stat_busy "Mounting new /${1}"
 mount ${SQUASH_ROOT}/${1}/ro
 mount /${1}
stat_done