title: Disable copying a file in FUSE
body: <p>I have written a simple pass-through filesystem using <code>python-fuse</code>. Now I want to restrict user from copying the file which he is accessing via FUSE. In what way can I implement this?
  e.g. Error message should be displayed if he tries to do <code>cp [source file in FUSE] [destination]</code> but it should work fine if he does <code>cat [filename]</code></p>