从Ruby运行交互式程序 [英] Running an interactive program from Ruby

问题描述

我试图从红宝石(不使用外部gem)运行gnuplot并解析其文本输出.我尝试了IO.popen，PTY.spawn和Open3.popen3，但是每当我尝试获取输出时，它只会挂起"-我想等待更多的输出.我觉得使用Thread.new以某种方式完成了该操作，但是我找不到实现它的正确方法.

I am trying to run gnuplot from ruby (not using an external gem) and parsing its textual output also. I tried IO.popen, PTY.spawn and Open3.popen3 but whenever I try to get the output it just "hangs" -I guess waiting for more output to come. I feel like its somehow done using Thread.new but I couldn't find the correct way to implement it.

有人知道怎么做吗?

推荐答案

我想这就是您想要的:

require 'pty'
require 'expect'

PTY.spawn('gnuplot') do |input, output, pid|
  str = input.expect(/gnuplot>/)
  puts str
  output.puts "mlqksdf"

  str = input.expect(/gnuplot>/)
  puts str
  output.puts "exit"
end

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