bash 捕获期望 ssh 输出到变量
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capture expect ssh output to variable
提问by auahmed
Hey am new to bash scripts and was wondering how would I capture the output of the sshcommand into a bash variable? I looked around and cant seem to get it right. I have tried puts $expect_out(buffer)but when echoit says variable does not exist
嘿，我是 bash 脚本的新手，想知道如何将ssh命令的输出捕获到 bash 变量中？我环顾四周，似乎无法做对。我试过 puts$expect_out(buffer)但当echo它说变量不存在时
I know the response should be just one line and if I want to save that into a variable responseand then echoit how would I do that?
我知道响应应该只是一行，如果我想将它保存到一个变量中response，然后echo我该怎么做？
采纳答案by Dinesh
A generic idea can be something like as below.
一个通用的想法可能如下所示。
spawnthe ssh session- make proper login
- Send each commands with
send - Wait for desired output with
expect
spawnssh 会话- 正确登录
- 发送每个命令
send - 等待所需的输出
expect
Example:
例子：
spawn ssh $user@$domain
expect "password" { send "$pwd\r"}
expect "#"; # This '#' is nothing but the terminal prompt
send "$cmd\r"
expect "#"
puts $expect_out(buffer); #Will print the output of the 'cmd' output now.
The word to wait for after executing the command can vary based on your system. It can be #or $or >or :; So, make sure you are giving the correct one. Or, you can provide a generalized pattern for the prompt as such
执行命令后等待的词可能因您的系统而异。它可以是#or$或>or :; 因此，请确保您提供的是正确的。或者，您可以为提示提供一个通用的模式
set prompt "#|>|:|\$"; # We escaped the `$` symbol with backslash to match literal '$'
While using the expectafter sending the commands, it can be used as
在使用expect发送命令后，它可以用作
expect -re $prompt; #Using regex to match the pattern`
