#!/bin/sh
set -e
set -x


if [ "x$1" = "x" ]; then
	echo "$0: [FILE]"
	exit 1
fi
FILE=$1
NAME=$(basename ${FILE})

if [ -w ${FILE} ]; then
	set +x
	read -p "$0: \`${FILE}\` exists: overwrite? (y/N):" answ
	if [ "x${answ}" != "xy" ]; then
		echo "$0: abort."
		exit 1
	fi
	set -x
fi

if [ ! -w ${FILE} ] || [ `file ${FILE} | grep -qoE 'LUKS encrypted file' && echo 0 || echo 1` -ne 0 ]; then
	dd if=/dev/zero of=${FILE} bs=1M count=50
	/sbin/cryptsetup luksFormat ${FILE}
fi

CS_OPEN_ARGS="-q -T1 open ${FILE} ${NAME}"
if [ "x${DEBUG}" != "x" ]; then
	sudo valgrind --log-file=valgrind.log src/naskpass -f ./${NAME}.fifo -c "/sbin/cryptsetup ${CS_OPEN_ARGS}" 2>./${NAME}_err.log || true
	sudo valgrind --tool=helgrind --log-file=helgrind.log src/naskpass -f ./${NAME}.fifo -c "/sbin/cryptsetup ${CS_OPEN_ARGS}" 2>./${NAME}_err_hell.log || true
else
	sudo src/naskpass -f ./${NAME}.fifo -c "/sbin/cryptsetup ${CS_OPEN_ARGS}" 2>./${NAME}_err.log
fi

set +e
sudo /sbin/cryptsetup status ${NAME}
ret=$?
set -e

if [ $ret -eq 0 ]; then
	sudo /sbin/cryptsetup close ${NAME}
	/bin/echo -e "\n$0: close'd"
fi