Create Directories with File permissions - Java

Question

I'm trying to create Directories locally with specific permissions, but it doesn't work in some cases and reverts to specific permissions.

This is my code

Path path = Paths.get(dir);
            
Set<PosixFilePermission> perms = PosixFilePermissions.fromString("rwxrw-rw-");
            System.out.println("Permissions are " + PosixFilePermissions.asFileAttribute(perms).value());
            Files.createDirectories(path, PosixFilePermissions.asFileAttribute(perms));

The directory created reverts to the default permissions

 drwxr--r--    3 user  staff     96 Apr 18 18:16 testing

My umask was 022, I changed it to 000, but it still makes no difference when I create a directory from my application. There is a difference as long as I create it directly on the Terminal.

It works in specific cases, as long as I don't provide write access to the group and everyone else. What am I doing wrong?

Answer 1

Ok, I might have figured it out with other answers on here.

If I run mkdir 755 testing, the permissions are still

drwxr-xr-x 2 user staff 64 Apr 18 19:10 testing

This is because my umask is 022

This impacts any file or directory created in a Unix based OS.

To fix this programmatically, I'm iterating over my directories until the user home and setting the permissions after creation

        Files.createDirectories(Paths.get(dir));
        Set<PosixFilePermission> perms = PosixFilePermissions.fromString("rwxrw-rw-");
        while(!path.toAbsolutePath().equals(Paths.get(System.getProperty("user.home")))) {
            Files.setPosixFilePermissions(path, perms);
            path = path.getParent();
        }