From 239ffd7eb78666f0f60698ef9edb8d8f121db378 Mon Sep 17 00:00:00 2001
From: Yuan Bai <bybai@cn.ibm.com>
Date: Mon, 12 Nov 2018 15:22:14 +0800
Subject: [PATCH] fix 5789 xcatlib.sh: line 186: &0 : syntax error (#5790)

---
 xCAT/postscripts/xcatlib.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xCAT/postscripts/xcatlib.sh b/xCAT/postscripts/xcatlib.sh
index afa5bcf87..e8f9859ab 100755
--- a/xCAT/postscripts/xcatlib.sh
+++ b/xCAT/postscripts/xcatlib.sh
@@ -107,7 +107,7 @@ function v4prefix2mask(){
     local num_index=1
     local str_temp=''
     local str_mask=''
-
+    [ ! $a ] && a=0
     while [[ $num_index -le 4 ]]
     do
         if [ $a -ge 8 ];then