# Change file ownership to specified user id and restrict access to him.
# Root user by default. This directory recursively by default.
# Usage: own [USER] [FILES]
function own() {
	local file="${2}"
	local user="${1}"

	# default to current dir.
	if [ "${file}" = "" ]; then
		file='.'
	fi

	# default to current user.
	if [ "${user}" = "" ]; then
		user="${UID}"
	fi

	# set ownership.
	chown "${user}":"${user}" -R "${file}" &> /dev/null

	# remove access from group and others.
	chmod -077 -R "${file}"
}