Class: Commutateurs::Ssh

Inherits:
Object
  • Object
show all
Defined in:
lib/commutateurs/ssh.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(verbose) ⇒ Ssh

Returns a new instance of Ssh.



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# File 'lib/commutateurs/ssh.rb', line 8

def initialize(verbose)
  @timeout = 10
  @verbose = verbose
  @debug = Proc.new { |line| $stderr.print(line) }
end

Instance Attribute Details

#debug ⇒ Object

Returns the value of attribute debug.



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# File 'lib/commutateurs/ssh.rb', line 6

def debug
  @debug
end

#default_prompt ⇒ Object

Returns the value of attribute default_prompt.



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# File 'lib/commutateurs/ssh.rb', line 6

def default_prompt
  @default_prompt
end

#host ⇒ Object

Returns the value of attribute host.



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# File 'lib/commutateurs/ssh.rb', line 5

def host
  @host
end

#password ⇒ Object

Returns the value of attribute password.



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# File 'lib/commutateurs/ssh.rb', line 5

def password
  @password
end

#port ⇒ Object

Returns the value of attribute port.



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# File 'lib/commutateurs/ssh.rb', line 5

def port
  @port
end

#timeout ⇒ Object

Returns the value of attribute timeout.



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# File 'lib/commutateurs/ssh.rb', line 6

def timeout
  @timeout
end

#user ⇒ Object

Returns the value of attribute user.



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# File 'lib/commutateurs/ssh.rb', line 5

def user
  @user
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/commutateurs/ssh.rb', line 53

def close
  Timeout::timeout(2) {
    @channel.close if @channel
    @channel = nil
    @ssh.close if @ssh
  }
rescue Timeout::Error
end

#command(cmd, options = {}) ⇒ Object 



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# File 'lib/commutateurs/ssh.rb', line 14

def command(cmd, options = {})
  send(cmd)
  expect(options[:prompt] || default_prompt) do |output|
    yield output if block_given?
  end
end

#connect(&block) ⇒ Object 



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# File 'lib/commutateurs/ssh.rb', line 21

def connect(&block)
  @output = []
  @channel_data = ""

  @ssh = Net::SSH.start(host, user, :port => port, :password => password, :timeout => timeout, :paranoid => Net::SSH::Verifiers::Null.new)

  @buf = ""
  @eof = false
  @channel = nil
  @ssh.open_channel do |channel|
    channel.request_pty { |ch,success| raise "failed to open pty" unless success }

    channel.send_channel_request("shell") do |ch, success|
      raise "failed to open ssh shell channel" unless success

      ch.on_data { |ch,data|
        # p data
        @debug.call(data) if @verbose
        @buf << data
      }
      ch.on_extended_data { |ch,type,data| @debug.call(data) if type == 1; @buf << data if type == 1 }
      ch.on_close { @eof = true }

      @channel = ch
      expect(default_prompt, &block)
      return
    end

  end
  @ssh.loop
end

#expect(prompt) ⇒ Object 



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# File 'lib/commutateurs/ssh.rb', line 62

def expect(prompt)
  line = ''
  sock = @ssh.transport.socket

  while not @eof
    # p prompt
    # p line
    break if line =~ prompt and @buf == ''
    break if sock.closed?

    IO::select([sock], [sock], nil, nil)

    process_ssh

    if @buf != ""
      line += @buf.gsub(/\r\n/no, "\n")
      @buf = ''
      yield line if block_given?
    elsif @eof
      # channel has been closed
      break if line =~ prompt
      if line == ''
        line = nil
        yield nil if block_given?
      end
      break
    end
  end
  line
end

#send(line) ⇒ Object 



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# File 'lib/commutateurs/ssh.rb', line 93

def send(line)
  @channel.send_data(line + "\n")
end