diff --git a/sh/util.sh b/sh/util.sh
index a3c53bf..27310b0 100644
--- a/sh/util.sh
+++ b/sh/util.sh
@@ -48,6 +48,10 @@ rwx_remove() {
 		"${@}"
 }
 
+rwx_root() {
+	id --user
+}
+
 rwx_warn_wipe() {
 	local tmp
 	rwx_list_block_devices