URIS

  http://raa.ruby-lang.org/project/open4/
  http://www.codeforpeople.com/lib/ruby/open4/

SYNOPSIS

  Open3::popen3 with exitstatus

  status =
    Open4::open4('sh') do |cid, i, o, e|
      i.puts 'echo 42'
      i.close
      puts o.read
      puts e.read
    end

  pid, exitstatus = status.pid, status.exitstatus

DOCS

  see samples/*