如何在tmux中获取send-keys的结果? [英] How to get the result of send-keys in tmux?

问题描述

我正在使用 tmux 来运行服务器控制台.要检查控制台是否正在应答，我想使用 send-keys 在控制台上运行命令:

I am using tmux to run a server console. To check whether the console is answering, I would like to use send-keys to run a command on the console:

tmux send-keys -t mysess:mywin "show info" Enter

(实际上，我目前正在将完整的控制台输出记录到一个文件中并读取最后一行，但我希望存在更好的解决方案.)

(Actually, I’m currently logging the full console output to a file and reading the last line, but I hope that a better solution exists.)

tmux pipe-pane -o -t mysess:mywin 'cat >> mysess-mywin.log'

推荐答案

您访问输出的方式的上下文将影响此解决方案是否更好，但这可能有效:

The context of how you are accessing the output will impact whether this solution is better or not, but this might work:

tmux send-keys -t <session:win.pane> '<command>' Enter
tmux capture-pane -t <session:win.pane> 
tmux show-buffer

您应该可以使用 capture-pane 的 -S 和 -E 选项，以及窗格，以准确捕获输出.如果您愿意，也可以使用 show-panes 和一个小的正则表达式来捕获窗格的高度，然后只需使用 -S 只捕获最后一行.

You should be able to play with the -S, and -E options of capture-pane, as well as the size of the pane, to accurately capture the output. If you're so inclined, you could also use show-panes and a small regexp to capture the height of the pane, and then just use -S <height - 1> to capture just the last line.

然后很容易从另一个程序中读取它(例如，在 python 中):

It's then simple to read this from another program like so (e.g., in python):

print Popen(['tmux', 'show-buffer'], stdout=PIPE).communicate()[0]

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