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I want to convert
Relative Path - /home/stevin/data/APP_SERVICE/../datafile.txt
to
Absolute Path - /home/stevin/data/datafile.txt
Is there a built-in tool in Unix to do this or any good ideas as to how can I implement this?
901
The absolutePath function works by beginning at the starting folder and moving up one level for each "../" in the relative path. Then it concatenates the changed starting folder with the relative path to produce the equivalent absolute path.
To determine the exact location of your current directory within the file system, go to a shell prompt and type the command pwd. This tells you that you are in the user sam's directory, which is in the /home directory. The command pwd stands for print working directory.
In this case, first, we need the current script's path, and from it, we use dirname to get the directory path of the script file. Once we have that, we cd into the folder and print the working directory. To get the full or absolute path, we attach the basename of the script file to the directory path or $DIR_PATH.
readlink -f /home/stevin/data/APP_SERVICE/../datafile.txt should do what you're looking for, assuming your Unix/Linux has readlink.
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