Closing File Descriptors

[Davy Durham]

Any idea why doesn't this code close fd 3 like I think the man page says 
it should under the "REDIRECTION.Duplicating File Descriptors" section

(linux 2.4's /proc file system)




#!/bin/bash

while read -u 3 foo
do
       ls -al /proc/$$/fd
       echo $foo

       3<&-
done 3< /etc/hosts



Thanks...