重定向标准输入来自使用bash不同的终端 [英] redirect the stdin to come from a different terminal using Bash

问题描述

我不知道人们会如何去从当前的xterm会议即/ dev的重定向脚本的标准输入/ PTS / 0一还运行即的/ dev /使用bash PTS / 1？我有一个打开的xterm 3窗户bash脚本，我想从只有一个窗口输入，我无法弄清楚如何做到这一点。任何帮助AP preciated！谢谢。

I'm wondering how one would go about redirecting the stdin of a script from the current xterm session i.e. /dev/pts/0 to one that is also running i.e /dev/pts/1 using bash? I have a bash script that opens 3 xterm windows and I want to get input from only one of those windows and I cannot figure out how to do it. Any help is appreciated! thanks.

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修改（从下面移动 - OP提交了该澄清的答案）

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EDIT (Moved from below -- OP submitted this clarification as an answer)

我想我应该澄清了我想做的事。我将从PTY启动脚本，让我们说这是为/ dev / PTS / 3。该脚本将打开3 XTerminals使用，可以说是：/ dev / PTS / 0中，/ dev / PTS / 1，和/ dev / PTS / 2。这3个新的pty是什么用户会看到的。该脚本会询问一些用户输入，我想用户的输入被输入到的/ dev / PTY / 1和程序应该得到它的信息来自那里。不过，我一直在努力，做到这一点，这是行不通的。这里是我的code片段。

I guess I should have clarified what I wanted to do. I will start a script from a pty, let's say it's /dev/pts/3. This script will open 3 xterminals, lets say: /dev/pts/0, /dev/pts/1, and /dev/pts/2. These 3 new ptys are what the user is going to see. The script asks the user for some input and I want the input of the user to be typed into /dev/pty/1 and the program should get it's info from there. However I've tried to do this and it doesn't work. Here's a snippet of my code.

exec</dev/pts/1

echo
echo "Would you like to search for more info?" 1>/dev/pts/1
read answer

case $answer in
    y) echo "YES" ;;
    n) echo "NO"  ;;
    *) echo "y/n only!";;
esac

在最后的case语句是只是一个小的占位符，看看输入的实际工作。

The case statement at the end is just a little placeholder to see if the input actually worked.

推荐答案

我怀疑这是不可能的。据我所知，没有在内核空间修改的东西，这是不可能读取一个TTY（或控股）输入的不是当前的tty。甚至根本不能做到这一点。我花了一些时间寻找到这一点，我无法找出如何做到这一点，但我没有找到很多自称来源这是不可能的。这似乎是一个设计决策，以提高用户的安全/隐私。

I suspect this is not possible. AFAIK, without modifying something in kernel space, it's impossible to read the input from a tty (or pty) that is not the current tty. Even root can't do it. I spent some time looking into this and I was unable to find out how to do it, but I did find lots of sources claiming it was impossible. This appears to have been a design decision to increase security/privacy of users.

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