如何在 shell 脚本执行期间处理用户提示/用户干预 [英] How to handle user prompt/user intervention during shell script execution

问题描述

考虑询问用户输入是否继续的 shell 脚本[yY/nN] 和另一个脚本调用所有这些脚本.
我不想手动输入 Yy.
注意:用户输入不是脚本的参数，它会在脚本执行期间随时发生.
考虑 3 个 shell 脚本，即:a.sh, b.sh, c.sh.
执行时，脚本提示:

Consider shell scripts which ask user's input to proceed or not[yY/nN] and another script calls all these scripts.
I don't want to give Yy input manually.
Note: User input is not an argument to a script and it occurs anytime during script execution.
Consider 3 shell scripts viz: a.sh, b.sh, c.sh.
On execution, scripts prompt:

"You want to Proceed[Y/y/N/n]?"

现在，Wrapper.sh 调用 a.sh, b.sh, c.sh 并在这些脚本时提供 Y/y 或 N/n 输入提示.
我无法将参数作为 a.sh "Y"
[ps: a.sh b.sh c.sh 不可执行且不可编辑]
RHEL无法安装任何第三方插件，所以只需要使用默认插件/命令即可.

Now, Wrapper.sh calls a.sh, b.sh, c.sh and also provides Y/y or N/n input as and when those scripts prompts.
I can not pass an argument as a.sh "Y"
[ps: a.sh b.sh c.sh are not executable and non-editable]
Can not install any third party plugins on RHEL, So need to use only default plugins/commands.

推荐答案

您可以尝试 expect 工具，该工具用于将输入自动提供给交互式程序.尝试从这样的事情开始:

You can try expect tool which is used to feed input automatically to an interactive program. Try to begin with something like this:

#!/usr/bin/expect

set timeout 10

spawn "PATH_TO/a.sh"
expect "You want to Proceed" 
send "y\r"

interact

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