diff -r 603f3d901a21 Doc/library/io.rst
--- a/Doc/library/io.rst	Tue Sep 09 07:40:04 2014 +1200
+++ b/Doc/library/io.rst	Tue Sep 09 07:55:42 2014 +1200
@@ -521,7 +521,9 @@
    * a character string or :class:`bytes` object representing the path to the
      file which will be opened;
    * an integer representing the number of an existing OS-level file descriptor
-     to which the resulting :class:`FileIO` object will give access.
+     to which the resulting :class:`FileIO` object will give access. When the
+     FileIO object is closed this fd will be closed as well, unless *closefd*
+     is set to ``False``.
 
    The *mode* can be ``'r'``, ``'w'``, ``'x'`` or ``'a'`` for reading
    (default), writing, exclusive creation or appending. The file will be
diff -r 603f3d901a21 Lib/test/test_fileio.py
--- a/Lib/test/test_fileio.py	Tue Sep 09 07:40:04 2014 +1200
+++ b/Lib/test/test_fileio.py	Tue Sep 09 07:55:42 2014 +1200
@@ -112,11 +112,13 @@
         self.assertRaises(TypeError, self.f.write, "Hello!")
 
     def testRepr(self):
-        self.assertEqual(repr(self.f), "<_io.FileIO name=%r mode=%r>"
-                                        % (self.f.name, self.f.mode))
+        self.assertEqual(
+            repr(self.f), "<_io.FileIO name=%r mode=%r closefd='%d'>"
+                          % (self.f.name, self.f.mode, self.f.closefd))
         del self.f.name
-        self.assertEqual(repr(self.f), "<_io.FileIO fd=%r mode=%r>"
-                                        % (self.f.fileno(), self.f.mode))
+        self.assertEqual(
+            repr(self.f), "<_io.FileIO fd=%r mode=%r closefd='%d'>"
+                          % (self.f.fileno(), self.f.mode, self.f.closefd))
         self.f.close()
         self.assertEqual(repr(self.f), "<_io.FileIO [closed]>")
 
diff -r 603f3d901a21 Modules/_io/fileio.c
--- a/Modules/_io/fileio.c	Tue Sep 09 07:40:04 2014 +1200
+++ b/Modules/_io/fileio.c	Tue Sep 09 07:55:42 2014 +1200
@@ -1054,12 +1054,14 @@
             PyErr_Clear();
         else
             return NULL;
-        res = PyUnicode_FromFormat("<_io.FileIO fd=%d mode='%s'>",
-                                   self->fd, mode_string(self));
+        res = PyUnicode_FromFormat(
+	    "<_io.FileIO fd=%d mode='%s' closefd='%d'>",
+	    self->fd, mode_string(self), self->closefd);
     }
     else {
-        res = PyUnicode_FromFormat("<_io.FileIO name=%R mode='%s'>",
-                                   nameobj, mode_string(self));
+        res = PyUnicode_FromFormat(
+	    "<_io.FileIO name=%R mode='%s' closefd='%d'>",
+	    nameobj, mode_string(self), self->closefd);
         Py_DECREF(nameobj);
     }
     return res;