--- zfs	2020-08-18 11:10:41.000000000 +0200
+++ zfs	2020-09-04 20:44:54.641501167 +0200
@@ -1105,5 +1105,5 @@
 
 uid()
 {
-	dd if=/dev/urandom of=/dev/stdout bs=1 count=100 2>/dev/null | tr -dc 'a-z0-9' | cut -c-6
+	grep -a -m10 -E "\*" /dev/urandom 2>/dev/null | tr -dc 'a-z0-9' | cut -c-6
 }