From 6a49e6f7e2571b12644b6c810db99df0c1584d39 Mon Sep 17 00:00:00 2001
From: Dirk Zimoch <dirk.zimoch@psi.ch>
Date: Tue, 3 Nov 2015 15:33:26 +0100
Subject: [PATCH] add error message

---
 runScript.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/runScript.c b/runScript.c
index ea35618..65d0a1c 100644
--- a/runScript.c
+++ b/runScript.c
@@ -36,6 +36,12 @@ int runScript(const char* filename, const char* args)
     char** pairs;
     int status = 0;
     
+    if (!filename)
+    {
+        fprintf(stderr, "Usage: runScript filename [macro=value,...]\n");
+        return -1;
+    }
+    
     if (interruptAccept)
     {
         fprintf(stderr, "Warning: Running script %s after iocInit may crash the ioc later.\n",