Piping stdin to ruby ​​script via `myapp | myscript.rb`

Question

I have an application that runs continuously, downloading output from the server and sending strings to stdout. I want to process this output with a Ruby script. The \n-terminated lines .

For example, I try to run this on the command line:

myapp.exe | my_script.rb

... s my_script.rbis defined as:

while $stdin.gets
    puts $_
end

Ultimately, I will process strings using regular expressions and display some summary data, but for now, I'm just trying to hook in some basic functions. When I run above, I get the following error:

my_script.rb:1:in `gets': Bad file descriptor (Errno::EBADF)
        from my_script.rb:1

I am running this on Windows Server 2003 R2 SP2 and Ruby 1.8.6.

How can I continuously process stdin in a Ruby script? (Continuously, as in not processing the file, but it works until I kill it.)

EDIT:

, . . -, , Ruby stdin Windows 2003R2. , , , script popen myapp.exe fork ed. , fork Windows, .

, POpen4, RubyGem, popen Windows. , script, , , myapp.exe:

file: my_script.rb

require 'rubygems'
require 'popen4'

 status =
    POpen4::popen4("myapp.exe") do |stdout, stderr, stdin, pid|
        puts pid
        while s = stdout.gets
            puts s
        end

    end

script myapp.exe, , .

Answer 1

gets $stdin. , myapp.exe ruby ​​script, IO.popen.

Answer 2

gets stdin, .

. fooobar.com/questions/24932/....

Answer 3

Ruby script, ruby:

myapp.exe | ruby my_script.rb

, stdin Ruby, Windows, .