我改了 /etc/asterisk/sip.conf 的内容 ，现在想使它生效 ，可以输入命令 sudo asterisk -r 进入
heizi-desktop*CLI> 输入 sip reload 然后 heizi-desktop*CLI> 输入exit , OK
现在我写了个脚本，希望可以 执行交互的功能，脚本如下：
#! /usr/bin/expect -f
spawn sudo asterisk -r
expect "heizi-desktop*CLI> "
send "sip reload\r"
expect "heizi-desktop*CLI> "
send "exit\r"
expect eof
打印信息如下 ： heizi@heizi-desktop:~/zhouzeming$ ./asterisk
spawn sudo asterisk -r
Asterisk 1.6.2.5-0ubuntu1, Copyright (C) 1999 - 2009 Digium, Inc. and others.
Created by Mark Spencer <markster@digium.com>
Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.
This is free software, with components licensed under the GNU General Public
License version 2 and other licenses; you are welcome to redistribute it under
certain conditions. Type 'core show license' for details.
=========================================================================
Connected to Asterisk 1.6.2.5-0ubuntu1 currently running on heizi-desktop (pid = 1405)
heizi-desktop*CLI> sip reload
heizi-desktop*CLI> exit
heizi@heizi-desktop:~/zhouzeming$
但是sip reload 没有实现啊？ 这是为什么呢？
