grep -qi 返回值不对！

mksu

如下  

grep -qi "^TOY_$1_ENABLE = y" $2 && (echo -e $BLUE "TOY_$1_ENABLE is y" $NC) || (echo -e $BLUE "TOY_$1_ENABLE is n" $NC)
echo $?

if [ $? -ne 0 ]; then
  START_BUILD_FLAG="true"
else
  START_BUILD_FLAG="false"
fi
echo "===>${START_BUILD_FLAG}"


打印出出来
TOY_XBH_ENABLE is n
0
===>false
false
TOY_XBM_ENABLE is n
0
===>false
false
TOY_XBL_ENABLE is y
0
===>false



问题：

为什么明明 找到了  但是$?  返回值还是 1