BSD4_2
#if defined(BSD4_2) || defined(ATTSVR4)
#if defined(BSD4_2) || defined(ATTSVR4)
#if !(defined(BSD4_2) || defined(ATTSVR4))
#ifdef BSD4_2
#if defined(BSD4_2) || defined(ATTSVR4)
#if defined(BSD4_2) || defined (ATTSVR4)
#if defined(BSD4_2) || defined(ATTSVR4)
#if defined(BSD4_2) || defined(ATTSVR4)
#if defined(BSD4_2) || defined(ATTSVR4)
#if !defined(BSD4_2) && !defined(BSD2_9) && !defined(ATTSVR4)
--- You must have either BSD4_2, BSD2_9, or ATTSVR4 defined for this to work
#if defined(BSD4_2) && defined(BSD2_9)
--- You may not have both BSD4_2 and BSD2_9 defined for this to work
#ifdef BSD4_2
#if defined(BSD4_2) || defined(ATTSVR4)
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#if defined(V9) || defined(BSD4_2)
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2
#ifdef BSD4_2