--- Net2/sys/unistd.h	2018/04/24 18:03:58	1.1.1.1
+++ Net2/sys/unistd.h	2018/04/24 18:16:47	1.1.1.2
@@ -30,11 +30,12 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	@(#)unistd.h	5.14 (Berkeley) 4/1/91
+ *	from: @(#)unistd.h	5.14 (Berkeley) 4/1/91
+ *	unistd.h,v 1.3 1993/05/20 16:23:41 cgd Exp
  */
 
 #ifndef _SYS_UNISTD_H_
-#define	_SYS_UNISTD_H_
+#define _SYS_UNISTD_H_
 
 /* compile-time symbolic constants */
 #define	_POSIX_JOB_CONTROL	/* implementation supports job control */