Make the overlayfs mount point's owners and modes match the underlay.

This fixes sudo in the chroot.

BUGS

@@ -1,5 +1,6 @@
 Current
 - Within the sandbox sudo is not working for tools.
+  <- Sudo is working now but its always asking for a password.
 - If a tool runs a script that needs sudo, the password prompt is garbling
   the screen and stopping input.
 - When paging the summary window, with the bottom scroll bar showing, the

sandbox_fs.py

@@ -20,6 +20,9 @@ class OverlayfsMount():
         subprocess.check_call(["sudo",  "mount", "-t", "overlayfs", "-o",
                                option_string, "overlayfs", self.mount_point],
                               stderr=subprocess.PIPE)
+        for command in ["chmod", "chown"]:
+            subprocess.check_call(["sudo", command, "--reference", lower_dir,
+                                   mount_point])
 
     def __repr__(self):
         return "<OverlayfsMount:%r over %r>" % (self.mount_point,

sandbox_fs_test.py

@@ -4,6 +4,7 @@
 # Licensed under the Artistic License 2.0.
 
 import os
+import subprocess
 import tempfile
 import unittest
 
@@ -23,7 +24,7 @@ class SandboxFilesystemTestCase(unittest.TestCase):
 
     def test_sandbox_minimal(self):
         foo_upper_path = os.path.join(self.sandbox.mount_point, "foo")
-        open(foo_upper_path, "w").close()
+        subprocess.check_call(["sudo", "touch", foo_upper_path])
         self.assertTrue(os.path.exists(foo_upper_path))
         foo_lower_path = os.path.join(self.sandbox.overlay_mounts[0].lower_dir,
                                       "foo")