diff --git a/build.sh b/build.sh
index fa47188..04f0b05 100755
--- a/build.sh
+++ b/build.sh
@@ -1,12 +1,16 @@
 # Main and minor version definition 
-mainverstr="s/ver_1/4/g"
+oem=$1 #厂商
+cpu=$(arch) #cpu架构
+sys=$(cat /etc/issue)
+sys=${sys%% *} #操作系统
+mainverstr="s/ver_1/4/g"  #版本控制
 minver="01"
 minverstr="s/ver_2/"
-oem="${1}"
-cpu=`arch`
 
-if cat /etc/*release | grep ^NAME | grep uos ; then
+
+if [ "$sys" == "UnionTech" ];then
     # uos ...
+
     if [ "$cpu" == "x86_64" ]; then
         minver="20"${minver}
     elif [ "$cpu" == "aarch64" ]; then
@@ -16,8 +20,9 @@ if cat /etc/*release | grep ^NAME | grep uos ; then
     else
         minver="29"${minver}
     fi
-elif cat /etc/*release | grep ^NAME | grep Kylin ; then
+elif [ "$sys" == "Kylin" ];then
     # kylin ...
+
     if [ "$cpu" == "x86_64" ]; then
         minver="30"${minver}
     elif [ "$cpu" == "aarch64" ]; then
@@ -42,12 +47,6 @@ fi
 minverstr=${minverstr}${minver}"/g"
 echo "minor version replacing pattern: "${minverstr}
 
-sysarch=$(arch)
-sys=$(cat /etc/issue)
-sys=${sys%% *}
-
-
-
 sed -ibkp ${mainverstr}                 hgdriver/wrapper/CMakeLists.txt
 sed -i    ${minverstr}                  hgdriver/wrapper/CMakeLists.txt
 
@@ -69,11 +68,12 @@ elif [ "$oem" == "lsc" ]; then
     sed -i    "s/1%m%d1/1%m%d7/g"                hgdriver/wrapper/CMakeLists.txt
 fi
 
-echo "------------------------------change cmake path:$1--------------------"
 if [ "$sys" == "UnionTech" ];then
     sed -i "s/kylin/uos/g"           hgdriver/wrapper/CMakeLists.txt
-elif [ "$sys" == "kylin" ];then
+elif [ "$sys" == "Kylin" ];then
     sed -i "s/uos/kylin/g"             hgdriver/wrapper/CMakeLists.txt
+else
+    echo "unknown os"
 fi
 
 cd ../
@@ -82,7 +82,9 @@ if [ -f ./build/CMakeCache.txt ]; then
 else
     mkdir build
 fi
+
 cd build 
+
 cmake ../code_device
 make 
 
@@ -92,7 +94,6 @@ if [ $? -ne 0 ];then
 else
    echo "--------------------------------------make succeed------------------------------------"
 fi
-
 #make
 
 if [ -f ../code_device/hgsane/CMakeLists.txtbkp ]; then