OSFS: don't produce syspaths for things outside the FS

fs/osfs/__init__.py

@@ -123,6 +123,8 @@ class OSFS(OSFSXAttrMixin, OSFSWatchMixin, FS):
     def getsyspath(self, path, allow_none=False):
         path = relpath(normpath(path)).replace("/",os.sep)
         path = os.path.join(self.root_path, path)
+        if not path.startswith(self.root_path):
+            raise PathError(path,msg="OSFS given path outside root: %(path)s")
         path = self._decode_path(path)
         return path
 

fs/tests/__init__.py

@@ -442,7 +442,6 @@ class FSTestCases(object):
 
     def test_cant_copy_from_os(self):
         sys_executable = os.path.abspath(os.path.realpath(sys.executable))
-        print "COPY", sys_executable
         self.assertRaises(FSError,self.fs.copy,sys_executable,"py.exe")
 
     def test_copyfile(self):