如何在 Linux shell 脚本的命令行上从“../”获取完整路径
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How to get full path from "../" on command line in Linux shell script
提问by Rob Segal
If I have a shell script where I get the parent folder using "../" can I expand that out somehow into it's absolute path?
如果我有一个 shell 脚本，我可以在其中使用“../”获取父文件夹，我可以以某种方式将其扩展为绝对路径吗？
采纳答案by Ignacio Vazquez-Abrams
You want readlink -f.
你要readlink -f。
$ cd /tmp
$ readlink -f ..
/
回答by Andrey Tatarinov
Use realpath
用 realpath
$ realpath ..
/home
回答by Howard Abrams
While you can often get the full path of a directory using stat, you can also use pwd -P... however, it isn't much help unless you actually cdto the directory you are interested in.
虽然您通常可以使用 获取目录的完整路径stat，但您也可以使用pwd -P... 但是，除非您确实cd访问了您感兴趣的目录，否则它没有多大帮助。
To get around this limitation without actually changing the current working directory, I've found it fine to just run that cdin a sub-shell, as in:
为了在不实际更改当前工作目录的情况下绕过此限制，我发现只需cd在sub-shell 中运行它就可以了，如下所示：
THIS=`dirname dirname $(pwd)
` # Which is often "."
PARENT=$(
cd $THIS # At this point, we are sure we're in script's directory
dirname `pwd -P`
)
echo "PARENT=$PARENT"
回答by Alex.Li
When using in cmd line:
在 cmd 行中使用时：
PROJ_DIR=$(dirname $(pwd))
When using in shell script:
在 shell 脚本中使用时：
##代码##