期望脚本正则表达式不起作用

Question

此脚本未能按预期工作：

#!/usr/bin/expect
set timeout 2
set server [lindex $argv 0]
set user [lindex $argv 1]
set password [lindex $argv 2]
set mac [lindex $argv 3]
set interface "po1"
spawn ssh $user@$server
expect "Password:"
send -- "$password\n"
expect "*>"
send "show mac address-table address $mac\n"
# 100      1cc1.de65.441c   dynamic ip,ipx,assigned,other Port-channel43
expect -re { (\d+) *($mac) *(dynamic|static) *(.*) *(.*)} {
        set interface $expect_out(5,string)
        expect "*>"
        send "show interface $interface status\n"
}
send "exit\n"
interact

发出上面的 show mac 命令后，输出包含一行看起来像下面注释的那一行。但是下面的 expect -re 块永远不会被命中，使其超时并发送退出命令。

示例输出： 生成 ssh 用户@host 密码：

================= Host login banner  =================
host>show mac address-table address 1cc1.de65.441c
Unicast Entries
 vlan     mac address     type        protocols               port
---------+---------------+--------+---------------------+-------------------------
 100      1cc1.de65.441c   dynamic ip,ipx,assigned,other Port-channel43


host>exit
Connection to host closed.

Answer 1

您的正则表达式不正确，不会发生大括号内的替换。即$mac 不会被替换，因为它在大括号内。

expect {
    -re "\\d+\\s+$mac\\s+(dynamic|static)\\s+\\S+\\s+(\\S+)" { set interface $expect_out(2,string); # Add your further code}
}