if then 逻辑在expect脚本中

Question

我有一个用于 ssh 的期望脚本。我的一些主机会提示输入 RSA 主机密钥文本，而另一些则不会。如何在 Expect 中为 if/then 设置脚本。这是我到目前为止所拥有的。

#!/usr/bin/expect -f

set ipaddress [lindex $argv 0];
spawn ssh user@$ipaddress
expect "Are you sure you want to continue connecting (yes/no)?"
send "yes\r"
expect "user@$ipaddress's password:"
send "password\r"
set prompt {\$ $}
expect -re $prompt
send "$command\r"
expect -re $prompt
send "quit\r"
interact

我需要在 if/then 逻辑中构建的部分是这两行：

expect "Are you sure you want to continue connecting (yes/no)?"
send "yes\r"

逻辑流程是：

if expect "Are you sure you want to continue connecting (yes/no)?"
then send "yes\r"
else
expect "user@$ipaddress's password:"
etc..

我怎样才能做到这一点？

Answer 1

通过以下代码修改，这对我有用。

expect {
    "Are you sure you want to continue connecting (yes/no)?" {
         send "yes\r"
         exp_continue
    }
    "user@$ipaddress's password:" {
         send "password\r"
    }
    }