#!/bin/sh
#
#

check_mounted() {
	DIR=$1
	while [ "$DIR" != "/" ]; do
		if [ -n "`mount | grep "$DIR"`" ]; then
			return 0
		fi

		DIR=`dirname $DIR`
	done
	return 1
}

check_writable() {
	CHECKFILE="$1/.container-lock"
	/bin/touch $CHECKFILE

	if [ $? -gt 0 ]; then
		return 1;
	fi

	/bin/echo "0123456789" >> $CHECKFILE

	if [ $? -gt 0 ]; then
		return 2;
	fi

	/bin/rm $CHECKFILE

	if [ $? -gt 0 ]; then
		return 3;
	fi
}

# get the path for the container
CONTAINER=`uci -q get ibrdtn.storage.container`

if [ -z "$CONTAINER" ]; then
	exit 0
fi

CONTAINER_PATH=`dirname $CONTAINER`

if [ -n "$CONTAINER_PATH" ]; then
	# check if the container is on a mounted device
	check_mounted $CONTAINER_PATH

	if [ $? -gt 0 ]; then
		# failed
		exit 1
	fi

	# check if the device is writable
	check_writable $CONTAINER_PATH

	if [ $? -gt 0 ]; then
		# failed
		exit 1
	fi
fi