_rwx_cmd_cs() { rwx_crypt "${@}"; }

RWX_CRYPT_ROOT="${HOME}/home/crypt"

rwx_crypt() {
	local action="${1}"
	shift
	local action_close="close"
	local action_open="open"
	local mapper="/dev/mapper"
	local mount_root="/media"
	local crypt_arg crypt_file crypt_map crypt_mount pass_phrase
	case "${action}" in
	"${action_close}" | "${action_open}")
		local user_id
		user_id="$(id --user)"
		[ "${user_id}" -eq 0 ] ||
			rwx_log_error 1 "Not root"
		[ -n "${1}" ] ||
			rwx_log_error 2 "No files"
		[ "${action}" = "${action_open}" ] &&
			pass_phrase="$(rwx_read_passphrase)"
		for crypt_arg in "${@}"; do
			rwx_log_info
			crypt_file="${RWX_CRYPT_ROOT}/${crypt_arg}"
			if [ -f "${crypt_file}" ]; then
				crypt_map="${mapper}/${crypt_arg}"
				crypt_mount="${mount_root}/${crypt_arg}"
				case "${action}" in
				"${action_open}")
					rwx_log_info "OPEN"
					local nbd_device nbd_size
					local nbd_index=0
					while [ -z "${nbd_device}" ]; do
						if [ -f "/dev/nbd${nbd_index}" ]; then
							nbd_size="$(cat /sys/block/nbd"${nbd_index}/size")"
							[ "${nbd_size}" -eq 0 ] &&
								nbd_device="/dev/nbd${nbd_index}"
						fi
						nbd_index=$((nbd_index + 1))
					done
					[ -z "${nbd_device}" ] &&
						rwx_log_error 4 "No device available"
					rwx_log_info "device: ${nbd_device}"
					# TODO connect device
					# TODO open device
					echo "${pass_phrase}"
					# TODO make mount directory
					# TODO mount file system
					;;
				"${action_close}")
					rwx_log_info "CLOSE"
					# TODO unmount file system
					# TODO remove mount directory
					# TODO close device
					# TODO disconnect device
					;;
				*) ;;
				esac
			else
				rwx_log_error 3 "Not a file"
			fi
		done
		;;
	*)
		rwx_log_info "Usage:"
		rwx_log_info "${action_close}|${action_open}"
		# TODO list
		;;
	esac
}