#!/bin/sh
#
# Author: Martti Kuparinen <martti.kuparinen@iki.fi>
#
# $Id: secdir,v 1.2 2008-05-06 09:12:15 martti Exp $
#

SRC="${HOME}/.private"
DST="${HOME}/private"
OPT_I="60"

usage()
{
	cat << EOF

Usage: `basename $0` [-gh] [-i minutes] {-d | -e}

-d	Disable
-e	Enable

-g	Show a detailed setup guide
-h	This help
-i n	Stop after n minutes of idle time (default: 60)
-l	List current mounts

EOF
}

guide()
{
	cat << EOF

How to create a new encrypted directory with EncFS
##################################################

Install the required software
-----------------------------
sudo aptitude install encfs fuse-utils
sudo modprobe fuse
sudo adduser \${USER} fuse

Create the directories
----------------------
mkdir -p ~/.private ~/private
chmod 700 ~/.private ~/private

Start decryption
----------------
secdir -e
cd ~/private

Stop decryption
----------------
secdir -d

EOF
}

list()
{
	mount | grep ^encfs | awk '{ print $3 }' | while read i
	do
		df -h $i
	done
}

start()
{
	# $1 = idle
	if [ ! -z "`mount | grep ^encfs | awk '{ print $3 }' | grep ${DST}`" ]
	then
		echo "${DST} is already mounted."
		exit 1
	fi

	if [ -z "`lsmod | grep fuse`" ]; then
		echo "Loading the fuse kernel module"
		sudo modprobe fuse
	fi
	echo "Starting directory encryption"
	sudo encfs --idle=${1} --public ${SRC} ${DST}
	list
}

stop()
{
    sudo fusermount -u ${DST}
}

ARGV=`getopt deghi:lu${*}`
if [ ${?} != 0 ]; then
	usage
fi

OPT_D=
OPT_E=
for i; do
	case "${i}" in
	-d)
		OPT_D=YES
		shift
		;;
	-e)
		OPT_E=YES
		shift
		;;
	-g)
		guide
		exit
		;;
	-h)
		usage
		exit
		;;
	-i)
		OPT_I=${2}
		shift 2
		;;
	-l)
		list
		exit
		;;
	--)
		shift
		;;
	esac
done

if [ ! -z "${OPT_D}" ]; then
	stop
	exit
fi
if [ ! -z "${OPT_E}" ]; then
	start ${OPT_I}
	exit
fi
usage