Review permissions needed

[Phu2]

Regarding the permissions preset in .java.policy_move_to_home_dir:

        permission java.io.FilePermission "${user.dir}/-", "write, read, delete";

Do we really need these permissions on the whole installation directory recursively?

        permission java.io.FilePermission "${user.home}/-", "read";

Looks like only the subdirectory ${user.home}/.m2/-needs to be readable.
There might be other files and subdirectories in ${user.home} which do not need and should not be readable.

[dr0i]

Re permission java.io.FilePermission "${user.dir}/-", "write, read, delete"; : good question . I don't like that one, generally speaking.

[katauber]

I tested a bit around and I think we can restrict the File Permissions further like in 330eff0
Do you like this more @dr0i and @Phu2 ? :)

[Phu2]

Looks good to me.
This is related to #122 right?

[katauber]

Looks good to me. This is related to #122 right?

Not really. This issue is about File permissions of the Security Manager (read, write, delete access) and #122 is about the size of the files generated by the Playground while processing. I don't think the Security Manager can set size limits; that must be implemented in the code I think.

[dr0i]

+1 for 330eff0