您可以在bash中运行一半的脚本，而在期望中运行另一半的脚本吗? [英] can you run half a script in bash and the other half in expect

问题描述

我正在尝试使脚本自动进行ssh登录并为文件中保存的多个IP地址下载文件，即时通讯使用for i in $(cat /dir/file)，问题是cat函数在预期中起作用，所以我不能使用它在用Expect解释的脚本上. 我想知道是否有可能使脚本的一半由bash解释，另一半由期望这样的解释

Im trying to make a script to automate ssh login and download of a file for multiple ip addresses that are kept in a file, im using a for i in $(cat /dir/file), problem is the cat function is working in expect so i cant use it on a script that is interpreted with expect. I wanted to know if it is possible to make half of the script be interpreted by bash and the other half by expect like this

#!/bin/bash
code........
#!/usr/bin/expect
code........

我的代码现在看起来像这样

my code now looks like this

#!/bin/bash
expect <<-EOF
    spawn sftp user@server
    expect "*password:" { send "password\r" }
    expect "*" { send "get /home/file\r" } 
    expect "*" { send "bye\r" }
EOF

我现在收到此回复

spawn sftp user@server
user@server´s password: user@hostname: /home/user

基本上可以恢复到正常的终端状态

basically it return to the normal terminal state

推荐答案

Heredoc might be the solution for you. I haven't used expect before, so it might seem a little buggy, but the following script works:

#!/bin/bash

USER=user
SERVER=server
read -sp "password: " PASSWORD

expect <<-EOF
        spawn ssh ${USER}@${SERVER}
        expect "*: "
        send "${PASSWORD}\r"
        expect "*$ "
        send "ls\r"
        expect "*$ "
        send "exit\r"
EOF
exit $?

此处的关键字是<<-EOF和EOF.介于两者之间的代码由expect执行.

The keywords here are <<-EOF and EOF. The code in between is executed by expect.

请注意，sftp仅在您期望*>时有效.字符串*太宽，导致expect对过早的文本做出反应(例如motd，已连接到服务器."等).

Note that sftp only works when you expect *>. The string * is too broad, which causes expect to react to premature text (e.g. motd, "Connected to server.", etc).

#!/bin/bash

USER=user
SERVER=server
read -sp "password: " PASSWORD

expect <<-EOF
        spawn sftp ${USER}@${SERVER}
        expect "* " { send "${PASSWORD}\r" }
        expect "*> " { send "get derp\r" }
        expect "*> " { send "bye\r" }
EOF
exit $?

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