在Expect脚本中使用两个交互

Question

我正在尝试编写一个脚本，该脚本通过SSH连接到Linux机器，并允许从那里交互控制Cisco设备；在完成对设备的控制之后，我还想退出shell。

我有SSH密钥，不需要密码即可连接。下面代码中的go是一个通过SSH/Telnet连接到目标设备的Bash脚本。

到目前为止，我所做的是：

#!/usr/bin/expect
set arg1 [lindex $argv 0]
spawn ssh -p 24 my_username@my_linux.domain.com
expect "#"
send "go $arg1 \n"
expect "sername:"
send "my_username\n"
expect "assword:"
send "my_password\n"
interact
expect "root@my_linux:~#"
send "logout\n"
expect "my_username@my_linux:~ $"
send "logout\n"
interact

当我退出shell时，我得到的错误是：

Connection to my_linux.domain.com closed.
expect: spawn id exp4 not open
    while executing
"expect "root@my_linux:~#""
    (file "./aaa" line 11)

Answer 1

我已经解决了这个问题：

#!/usr/bin/expect
set timeout -1

set arg1 [lindex $argv 0]
spawn ssh -p 24 my_username@my_linux.domain.com
expect "#"
send "go $arg1 \n"
expect "sername:"
send "my_username\n"
expect "assword:"
send "my_password\n"
expect "#"
interact timeout 5 return
send "\n"
expect "root@my_linux:~#"
send "exit\n exit\n"
interact

说明:我添加了几行：

# This prevents commands from timing out (default timeout is 10 seconds).
set timeout -1

# When I type something, the timeout is ignored, but when I'm not typing,
# it waits 5 seconds and then continues.
interact timeout 5 return
send "\n"
expect "root@my_linux:~#"
send "exit\n exit\n"