ruby - 如何通过 SSH 交互 Session

Question

大家好

我需要在 linux 机器上执行命令这个命令是交互式的命令。交互式命令意味着需要输入 [yes , no] 或密码两次

我的真实情况是。我创建了一个脚本执行命令并成功获得了输出。但是有些服务器的登录密码已过期，所以我需要与服务器发送当前密码+新密码(两次)

ssh userName@10.0.0.243
userName@10.0.0.243's password:
You are required to change your password immediately (password aged)
Last login: Sun Aug  7 13:15:40 2011 from 10.0.0.28
WARNING: Your password has expired.
You must change your password now and login again!
Changing password for user userName.
Changing password for userName
(current) UNIX password:
New UNIX password:
Retype new UNIX password:

注释:

• 我正在使用 Ruby 1.9.2
• 我在正常情况下执行命令没有问题
• 拜托，我必须避免像 (echo "pass"| ssh -S) 这样的变通方法来让我通过任何其他交互情况。
• 我正在使用“net/ssh”库
• 附上脚本http://king-sabri.net/files/LinuxHWScanner.rb
• 我试过“net/ssh/telnet”但没有用
• 有些人建议使用“rake/remote_task”是解决方案，但我不明白它在我的情况下是如何工作的

如果你需要更简单，这里有一个简单的代码，如果你让它工作的话我想它会解决我以前的问题

  require 'net/ssh'

  host = "10.0.0.106"
  port = 22     # SSH port
  user = 'root'     # username
  pass = "123123"   # password

Net::SSH.start( host,user,:password => pass, :port=> port , :verbose => :error ) do |session|

 puts session.exec!("passwd root")
end

Answer 1

是这样的吗？

Net::SSH.start('10.0.0.6', 'not_root', :password => "test") do |ssh|
   ssh.open_channel do |channel|
      channel.on_request "exit-status" do |channel, data|
        $exit_status = data.read_long
      end
      channel.exec("passwd") do |channel, success|
        if success
          channel.on_data do |channel, data|
            # Don't really need this callback actually
            puts "got data: #{data.inspect}"
          end
          # You don't need this line if you're root
          channel.send_data("oldpass\n")
          channel.send_data("newpass\n")
          channel.send_data("newpass\n")
        else
           puts "FAILED"
        end
      end
      channel.wait
      puts "SUCCESS" if $exit_status == 0
   end
end

这个是脏的，但是在过早的过期提示和 passwd 发出时都有效:

Net::SSH.start('localhost', 'not_root', :password => "test") do |ssh|
  ssh.open_channel do |channel|
     channel.on_request "exit-status" do |channel, data|
        $exit_status = data.read_long
     end
     channel.on_data do |channel, data|
        puts data.inspect
        if data.inspect.include? "current"
                channel.send_data("oldpass\n");
        elsif data.inspect.include? "new"
                channel.send_data("newpass\n");
        end
     end
     channel.request_pty
     # This will just safely fail if we have already a password prompt on
     channel.exec("passwd");
     channel.wait
     # Will reflect a valid status in both cases
     puts $exit_status
  end
end