diff --git a/src/main.c b/src/main.c
index dfe3e8e..e6886b3 100644
--- a/src/main.c
+++ b/src/main.c
@@ -16,7 +16,14 @@
  *
  * How to install Scyther.
  *
- * \section coding Coding convertions
+ * \section exit Exit codes
+ *
+ * 0  Okay	No attack found, claims encountered
+ * 1  Error	Something went wrong (error)
+ * 2  Okay	No attack found (because) no claims encountered
+ * 3  Okay	Attack found
+ *
+ * \section coding Coding conventions
  *
  * Usually, each source file except main.c has an myfileInit() and myfileDone() function
  * available. These allow any initialisation and destruction of required structures.
@@ -368,6 +375,17 @@ main (int argc, char **argv)
   if (sys->attack != NULL && sys->attack->length != 0)
     {
       attackDisplay(sys);
+      /* mark exit code */
+      exitcode = 3;
+    }
+  else
+    {
+      /* check for no claims */
+      if (sys->failed == 0)
+	{
+          /* mark exit code */
+	  exitcode = 2;
+	}
     }
 
   /* latex closeup */
diff --git a/src/testl b/src/testl
index 9be507c..ec5544e 100755
--- a/src/testl
+++ b/src/testl
@@ -13,20 +13,21 @@ template=../src/attacktemplate
 
 if [ -f $file ]
 then 
-
     ../src/scyther --latex $file -o attack.tex
-    latex $template.tex
-
-    mv $template.dvi attack.dvi
-    dvips attack.dvi -o attack.ps
-
-    # also eps output now
-    ps2eps -f attack.ps
-
-    xdvi attack.dvi		# for Xdvi
-#    kdvi attack.dvi		# for KDE environment
-#    kghostview attack.ps	# postscript in KDE
-
+    if [ "$?" -eq "3" ]
+    then
+        latex $template.tex
+    
+        mv $template.dvi attack.dvi
+        dvips attack.dvi -o attack.ps
+    
+        # also eps output now
+        ps2eps -f attack.ps
+    
+        xdvi attack.dvi		# for Xdvi
+        #    kdvi attack.dvi		# for KDE environment
+        #    kghostview attack.ps	# postscript in KDE
+    fi
 else
 
   echo "No file $file found."