ruby net-ssh登录外壳 [英] ruby net-ssh login shell

问题描述

有什么办法可以使用net-ssh在ruby中获得登录shell吗? 那有可能吗?

Is there any way i can get a login shell in ruby using net-ssh? Is that even possible?

通过登录shell，我的意思是源/etc/profile..

By login shell i mean the ones the source /etc/profile..

推荐答案

Net-SSH级别太低，无法简单地预先提供(无论如何，现在还是这样).您可以签出基于Net-SSH的Net-SSH-Shell来添加登录Shell功能: https://github.com/mitchellh/net-ssh-shell

Net-SSH is too low level to simply provide this up front (the way it is now, anyways). You can check out Net-SSH-Shell which builds upon Net-SSH to add login shell functionality: https://github.com/mitchellh/net-ssh-shell

实现是可靠且可行的，但是我发现它并不太有用，因为您不能专门提取诸如stderr或退出状态之类的东西，因为命令在子shell中运行，因此您只能获取stdout. net-ssh-shell库使用一些技巧来获取退出状态.

The implementation is solid and works, however I found its not too useful since you can't specifically extract things like stderr or exit status because the commands run in a sub-shell, so you can only get stdout. The net-ssh-shell library uses some hacks to get the exit status.

对于我自己的Ruby项目，我需要一个登录外壳"，为此，我通常使用以下代码直接在外壳中执行操作:

I've needed a "login shell" for my own Ruby projects and to do this I've generally executed things directly into the shell using the following code:

def execute_in_shell!(commands, shell="bash")
  channel = session.open_channel do |ch|
    ch.exec("#{shell} -l") do |ch2, success|
      # Set the terminal type
      ch2.send_data "export TERM=vt100\n"

      # Output each command as if they were entered on the command line
      [commands].flatten.each do |command|
        ch2.send_data "#{command}\n"
      end

      # Remember to exit or we'll hang!
      ch2.send_data "exit\n"

      # Configure to listen to ch2 data so you can grab stdout
    end
  end

  # Wait for everything to complete
  channel.wait
end

使用此解决方案，您仍然不会获得退出状态或命令stderr进入登录外壳程序，但是至少命令是在该上下文中执行的.

With this solution you still don't get exit status or stderr of commands run into the login shell, but at least the commands are executed in that context.

我希望这会有所帮助.

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