protect against multiple includes

diff --git a/sys/sys/exec.h b/sys/sys/exec.h
index f26e1ae..e67eed9 100644 (file)
--- a/sys/sys/exec.h
+++ b/sys/sys/exec.h
@@ -1,4 +1,4 @@
-/*     $OpenBSD: exec.h,v 1.5 1996/12/23 02:42:39 deraadt Exp $        */
+/*     $OpenBSD: exec.h,v 1.6 1997/01/12 13:02:07 downsj Exp $ */
 /*     $NetBSD: exec.h,v 1.59 1996/02/09 18:25:09 christos Exp $       */
 
 /*-
@@ -43,6 +43,9 @@
  *     @(#)exec.h      8.3 (Berkeley) 1/21/94
  */
 
+#ifndef _SYS_EXEC_H_
+#define _SYS_EXEC_H_
+
 /*
  * The following structure is found at the top of the user stack of each
  * user process. The ps program uses it to locate argv and environment
@@ -215,3 +218,5 @@ extern int  exec_maxhdrsz;
 
 #include <sys/exec_aout.h>
 #include <machine/exec.h>
+
+#endif /* !_SYS_EXEC_H_ */