如何将 bash 期望脚本链接在一起？

Question

folks. I'm working on automating a process at work that involves entering in endless commands across a variety of VMs. It's all very simple stuff, but it's time consuming and human-error prone.

I stumbled across the "expect" commands and they suited my needs to begin with. I have a script that looks like this:

#!/usr/bin/expect -f

spawn ssh root@[server name]
expect "such and such" 
send "thing\n"

This repeats for a bit, and eventually I finish with the work on that VM. What I'd like the script to do is enter an exit command, and then start doing other commands in the local terminal I'm working on, like so:

... 
expect "last part"
send "exit\n"

expect "something"
send "new commands"

Alternatively:

...
expect "last part"
send "exit\n"

spawn ./newscript.sh

For whatever reason, expect seems to ignore my last exit command. If there's a way to do multiple spawns in one expect script, or, if there's a way to chain scripts together, please let me know.

Answer 1

Do this:

expect "last part"
send "exit\r"
expect eof    ;# allow the spawned process to gracefully exit

system ./newscript.sh

From the expect manual:

system args

gives args to sh(1) as input, just as if it had been typed as a command from a terminal. Expect waits until the shell terminates.