new unlinkat test from Yi CDL Yang
diff --git a/runtest/syscalls b/runtest/syscalls
index 49d67a1..ae6768d 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -901,6 +901,9 @@
 unlink07 unlink07
 unlink08 unlink08
 
+#unlinkat test cases
+unlinkat01 unlinkat01
+
 #
 # These tests require an unmounted block device
 # to run correctly. Please see individual test