Shell 脚本 - 如果目录不存在则创建目录

Question

我想输入一个目录的名称并检查它是否存在。
如果它不存在，我想创建但我收到错误 mkdir: cannot create directory'./' File exists
我的代码说该文件存在，即使它不存在。我究竟做错了什么？

echo "Enter directory name"
read dirname

if [[ ! -d "$dirname" ]]
then
    if [ -L $dirname]
then
    echo "File doesn't exist. Creating now"
    mkdir ./$dirname
    echo "File created"
    else
        echo "File exists"
    fi
fi

Answer 1

read -p "Enter Directory Name: " dirname
if [[ ! -d "$dirname" ]]
then
        if [[ ! -L $dirname ]]
        then
                echo "Directory doesn't exist. Creating now"
                mkdir $dirname
                echo "Directory created"
        else
                echo "Directory exists"
        fi
fi