Linux 尝试 mkdir 时的 Shell 变量问题
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Shell variable issue when trying to mkdir
提问by hax0r_n_code
Any ideas what is wrong with this code?
任何想法这段代码有什么问题?
CLIENT_BUILD_DIR="~/Desktop/TempDir/"
if [ ! -d $CLIENT_BUILD_DIR ]
then
{
mkdir $CLIENT_BUILD_DIR
}
fi
I get the error: mkdir: ~/Desktop: No such file or directory.
我收到错误消息:mkdir: ~/Desktop: No such file or directory。
Obviously the directory is there and the script works if I replace the variable with ~/Desktop/TempDir/
显然目录在那里,如果我用 ~/Desktop/TempDir/ 替换变量,脚本就可以工作
采纳答案by BeniBela
The quotes prevent the expansion of ~.
引号阻止了 ~ 的扩展。
Use:
用:
CLIENT_BUILD_DIR=~/Desktop/TempDir/
if [ ! -d "$CLIENT_BUILD_DIR" ]
then mkdir "$CLIENT_BUILD_DIR"
fi
回答by tomahh
The ~
character is not reinterpret when used in a variable.
所述~
在一个变量中使用时字符不重新解释。
You can use CLIENT_BUILD_DIR="$HOME/Desktop/TempDir/"
instead.
你可以CLIENT_BUILD_DIR="$HOME/Desktop/TempDir/"
改用。
回答by Oscar Montoya
mkdir ${CLIENT_BUILD_DIR}
will do. No directory will be created if it already exists.
mkdir ${CLIENT_BUILD_DIR}
会做。如果目录已经存在,则不会创建目录。