将进程stdin和stdout重定向到netcat [英] Redirect process stdin and stdout to netcat

问题描述

我有一个带有简单交互式命令行界面的嵌入式Linux应用程序.

I have an embedded linux application with a simple interactive command line interface.

我想从telnet(或通常的网络)访问命令行.

I'd like to access the command line from telnet (or network, in general).

但是，该过程应在电路板开启时并在唯一的情况下开始.因此，以下netcat命令不是一个选项:

However, the process should be started when the board turns on, and in a unique instance. So, the following netcat command is not an option:

nc -l -p 4000 -e myapp

我可以做到

nc -l -p 4000 | myapp

向myapp发送远程命令，但是这样我看不到myapp输出.

to send remote commands to myapp, but this way I can't see myapp output.

是否可以将两者 stdin和stdout都重定向到netcat?

Is there any way to redirect both stdin and stdout to netcat?

谢谢.

推荐答案

我发现通过使用bash v.> = 4.0，我可以使用coproc:

I found that by using bash v. >= 4.0 I can use coproc:

#!/bin/bash

coproc myapp
nc -kl -p 4000 <&"${COPROC[0]}" >&"${COPROC[1]}"

编辑

最终，我在cli库中合并了一个telnet服务器.您可以在GitHub上找到结果: https://github.com/daniele77/cli

I eventually incorporated a telnet server in my cli library. You can find the result on GitHub: https://github.com/daniele77/cli

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