如何将数据管道传输到stdin上通过net::ssh启动的进程?

好吧,我想出来了:

#!/usr/bin/env ruby 

require 'rubygems'
require 'net/ssh'

res = ""
c = Net::SSH.start("127.0.0.1", "xxx", :password => "xxx")
c.open_channel do |channel|
  channel.exec("sed 's/foo/bar/g'") do |ch, success|
    channel.on_data do |ch,data|
      res << data
    end

    channel.send_data "foosball"
    channel.eof!
  end
end
c.loop
puts res # => "barsball"