如何从tmux会话中获取stdout和stderr? [英] How to get stdout and stderr from a tmux session?

问题描述

我正在linux系统中编写示例python程序.我正在使用 tmux 创建会话并在tmux会话中执行另一个脚本.我想从tmux会话中将stdout和stderr移到父脚本，但是以某种方式不起作用.

I am writing a sample python program in linux system. I am using tmux to create a session and execute another script within the tmux-session. I would like to get the stdout and stderr out of the tmux session to the parent script but that somehow does not work.

代码段:

cmd = "tmux new-session -d -s 'test' '/my_dir/fibonacci.py __name:=fibonacci_0'"

proc = Popen(cmd, shell=True, stdout=PIPE, stderr=PIPE)

(stdout, stderr) = proc.communicate()

print(stderr)

我遇到了使用 show-buffer 和

I have came across answers to use show-buffer and pipe-pane. But that did not help. Maybe I need to modify the tmux command itself.

推荐答案

感谢您的支持.经过一番研究后，我想出了一种解决方法.我只是在这里为有类似需求的人添加它.

Thank you for your support. After digging a bit, I came up with a workaround. I am just adding it here for someone with similar needs.

我所做的是创建一个命名管道，将tmux会话的输出重定向到命名管道，然后最终从中读取.

What I have done is created a named pipe, redirect the output of tmux session to named pipe and then finally read from it.

# this attach if a session exists or creates one, then exits from the session
call("tmux new-session -A -s test \; detach", shell=True)

# to avoid conflict, remove existing named pipe and then create named pipe
call("rm -f /tmp/mypipe && mkfifo /tmp/mypipe && tmux pipe-pane -t test -o 'cat > /tmp/mypipe'", shell=True)

# feed the pipe to the stdout and stderr
poc = Popen(['cat', '/tmp/mypipe'], stdout=PIPE, stderr=PIPE)

# finally execute the command in tmux session
Popen(['tmux', 'send-keys', '-t', '/my_dir/fibonacci.py', 'C-m'])
(stdout, stderr) = proc.communicate()
print(stderr)

希望这会有所帮助.

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