批量处理window下^M符号

#！/bin/ksh
#set -x
#
#去掉文件中的^M 符号
#
usage()
{
    echo "Usage : sh ToAscll.sh [Option] [value]"
    echo "Option -path 文件目录" 
    echo "sh ToAscll.sh -path /batch/rjxf/YFZX20190328"
}

function readfile
{
   filelist=`ls $2`
   for file in $filelist
   do
   echo $2"/"$file
   if [ -d $2"/"$file ];then
   readfile 1 $2"/"$file
   else
   cat $2"/"$file | tr -d "
" > $2"/"$file"_new"
   rm -rf $2"/"$file
   cp $2"/"$file"_new" $2"/"$file
   rm -rf $2"/"$file"_new"
   fi
   done
}

FAIL=1

if [ $# -eq 0 ]
then
     usage
     exit $FAIL

fi
while [ 1 ]
do 
    case $1 in 
    "-path")
            shift 1
            JOB_CODE=$1
            shift 1
            ;;
    *)        
        echo "[ERROR][$SHELL_CMD] 调用错误,参数不支持！"
        usage
        exit $FAIL
        ;;
    esac

    if [ $# -eq 0 ]
    then
        break
    fi
done

if [ -n "$JOB_CODE" ]
then    
    echo "start .............">>./logs.log
    readfile 1 $JOB_CODE
else
    echo "[ERROR][$SHELL_CMD] 调用错误,参数不支持！"
    usage
    exit $FAIL
fi    

希望能够帮助有需要的小伙们O(∩_∩)O哈哈~