diff --git a/sh/util.sh b/sh/util.sh
index 7d9cc3f..a7956ef 100644
--- a/sh/util.sh
+++ b/sh/util.sh
@@ -1,3 +1,11 @@
+rwx_file_write() {
+	local file="${1}"
+	local text="${2}"
+	if [ -n "${file}" ]; then
+		printf "%s" "${text}" > "${file}"
+	fi
+}
+
 rwx_list_block_devices() {
 	lsblk \
 		--noempty \