光标旋转函数

line_line ()
{
sl=1
out=0
aa=$(uname)
echo $aa
while :
    do
        out=`expr $out + 1`;
    case $out in
        "1")    echo -e '-'"\b\c"
            sleep $sl
            ;;
        "2")    echo -e '\\'"\b\c"
            sleep $sl
            ;;
        "3")    echo -e '|'"\b\c"
            sleep $sl;
            ;;
        "4")    echo -e '/'"\b\c";
            sleep $sl;
            ;;
        *)    out=0;
            ;;
    esac
done
}