From eea777740c560ad78f864d58ac9a3afd03e46e73 Mon Sep 17 00:00:00 2001
From: Jason Tibbitts <tibbs@math.uh.edu>
Date: Jul 10 2018 06:25:35 +0000
Subject: Handle missing/unreadable input dir.


---

diff --git a/find-needless-defattr b/find-needless-defattr
index c17f6ef..d36cf32 100755
--- a/find-needless-defattr
+++ b/find-needless-defattr
@@ -30,8 +30,8 @@ parse_args () {
 
 
     specdir=$1
-    if [[ -z $specdir ]]; then
-        (echo "Error: A directory must be specified."; echo; usage) >&2
+    if [[ -z $specdir || ! -x $specdir ]]; then
+        (echo "Error: A valid directory must be specified."; echo; usage) >&2
         exit 1
     fi
 }