From: Andrew Timberlake <andrew@...>
Date: 2009-01-05T16:21:23+09:00
Subject: Re: Question about run external program in Ruby

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On Mon, Jan 5, 2009 at 8:08 AM, Zhao Yi <youhaodeyi@gmail.com> wrote:

> I use this method to run a external program in ruby:
>
> io=IO.popen("lsa 2>&1")do |f|
>   while line =f.gets do
>       puts line
>   end
> end
>
> I can get both stdout and stderr output but how can I get the command
> return value?
>
> thanks.
> --
> Posted via http://www.ruby-forum.com/.
>
>
Try the following:
io=IO.popen("ruby some_file_that_doesnt_exist")do |f|
  while line =f.gets do
      puts line
  end
end
puts $?.exitstatus
#returns - 1

-- 
Andrew Timberlake
http://ramblingsonrails.com
http://www.linkedin.com/in/andrewtimberlake

"I have never let my schooling interfere with my education" - Mark Twain

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