diff --git a/retcode.h b/retcode.h
new file mode 100644
index 0000000..947244a
--- /dev/null
+++ b/retcode.h
@@ -0,0 +1,25 @@
+#ifndef __RETCODE_H__
+#define __RETCODE_H__
+
+#ifdef	FALSE
+#undef	FALSE
+#endif
+#ifdef	TRUE
+#undef	TRUE
+#endif
+
+#if 0
+#define FALSE   0		/* False, no, bad, etc.         */
+#define TRUE    1		/* True, yes, good, etc.        */
+#define ABORT   2		/* Death, ^G, abort, etc.       */
+#define	FAILED	3		/* not-quite fatal false return */
+#endif
+
+typedef enum {
+	FALSE,
+	TRUE
+} boolean ;
+
+#define ABORT 2
+
+#endif