diff -r 3057f813da14 tools/examples/block
--- a/tools/examples/block	Thu Nov 29 19:30:33 2007 +0000
+++ b/tools/examples/block	Wed Dec 05 22:57:56 2007 +0900
@@ -219,7 +219,8 @@ case "$command" in
       file)
         # Canonicalise the file, for sharing check comparison, and the mode
         # for ease of use here.
-        file=$(readlink -f "$p") || fatal "$p does not exist."
+        test -f "$p" || fatal "$p does not exist."
+        file=$(readlink -f "$p")
         mode=$(canonicalise_mode "$mode")
 
         claim_lock "block"