捕获过程的标准输入/ STDERR / STDOUT后，它已经开始，使用命令行？ [英] Capture STDIN / STDERR / STDOUT of a process AFTER it's been started, using command line?

问题描述

谢谢！我usercase：我开始一个漫长的互动配置过程（在屏幕说的），然后意识到我需要总是回答'不'，直到我看到某个关键字。好像是浪费时间用手工做到这一点（不是说我可以很容易错过关键词..）

Thanks! My usercase: I started a lengthy interactive 'configure' process (say under 'screen'), and then realised I need to always answer 'no' until I see a particular keyword. Seems a waste of time to do this by hand (not to say that I can easily miss the keyword..)

这样看来我要管STDERR / STDOUT（副本）到过滤器，
并且还能够注入A（控制台）过程的标准输入，
之后，它已经开始，使用命令行？是否有一个现成的解决方案？

Thus it seems I want to pipe (a copy of) STDERR / STDOUT to a filter, and also be able to inject into the STDIN of a (console) process, AFTER it's been started, using command line? Is there a ready-made solution?

下面的工具似乎帮助。要捕获输出，使用

The following tools seem help. To capture output, use

strace -ewrite -p $PID

这不是干净的（节目如行：写（＃）），但工程！
但它是否正确地说，把手UTF8？

It's not that clean (shows lines like: write(#,) ), but works! But does it say handle UTF8 correctly?

要输出重定向，像做

printf '..input..' >/dev/pts/33

不过，目前尚不清楚如何找到正确的设备。

But it is not clear how to find the right device..

推荐答案

在Linux操作系统（Linux的显然专用）解决：

Solved in Linux (apparently Linux-specific):

reptyr -s PID 

附加一个过程到另一终端和/或公开其输入和输出作为管道。

attaches a process to another terminal and/or exposes its input and output as pipes.

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