handin server error

[Cameron Swords]

Hi,

I'm trying to set up a handin server for a class this semester, and I'm getting the weirdest error message from the client side. Here it is:

submit error: Error in your code --
file-exists?: `exists' access denied for libobj.so

This seems tied to the fact that the submission file requires another file (precisely, it requires 2htdp/image as `(require 2htdp/image)`), and when I remove that it works fine (though obviously inhibits the assignment).

Attached are the checker and configuration.

Any help would mean a lot!

Thanks,
Cameron Swords

[Spencer Florence]

This is a little bit of a hack and weakens the handin server security but adding the following to the top of your checker file should make this error go away:

```

 (require handin-server/sandbox)

  (sandbox-path-permissions

   (cons

    (list 'read"/")

    (sandbox-path-permissions)))
```

--spencer

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[Eli Barzilay]

On Wed, Sep 7, 2016 at 11:52 AM, Spencer Florence <spe...@florence.io> wrote:
> This is a little bit of a hack and weakens the handin server security

Your suggestion is pretty bad in that it's more significant than it
looks. With it, you're allowing submission evaluation to read all files
on the handin server. You should at least replace the "/" path with the
system path that has the required libraries.

--
((x=>x(x))(x=>x(x))) Eli Barzilay:
http://barzilay.org/ Maze is Life!