"closerange(fd_low, fd_high)\n\n\

 Closes all file descriptors in [fd_low, fd_high), ignoring errors.");

+static int

+close_func(void *lohi, int fd)

+{

+    int lo = ((int *)lohi)[0];

+    int hi = ((int *)lohi)[1];

+

+    if (fd >= hi)

+        return (1);

+    else if (fd >= lo)

+        close(fd);

+

+    return (0);

+}

+

 static PyObject *

 posix_closerange(PyObject *self, PyObject *args)

 {

     int fd_from, fd_to, i;

+    int lohi[2];

+

     if (!PyArg_ParseTuple(args, "ii:closerange", &fd_from, &fd_to))

         return NULL;

     Py_BEGIN_ALLOW_THREADS

-    for (i = fd_from; i < fd_to; i++)

-        if (_PyVerify_fd(i))

-            close(i);

+

+    lohi[0] = fd_from;

+    lohi[1] = fd_to;

+    fdwalk(close_func, lohi);

+

     Py_END_ALLOW_THREADS

     Py_RETURN_NONE;

 }