使用Java在Linux中列出子目录/文件

Question

I was trying to run this code on Linux as a normal user but due to insufficient privileges listfiles() returning null.

File parentDirectory = new File("/root");
File[] childFiles = parentDirectory.listFiles();

How can I run the above code without running java application in SU mode.

• Can I ask the user to enter root password? So that I can run linux commands instead of java functions.

What all options I have to achieve this in java?

Answer 1

You can make the /root/ directory world-readable or group-readable. In the latter case, you must also add the user running the program to the appropriate group.

World readable:

sudo chmod o+r /root

Group readable:

sudo chmod g+r /root