EventMachine

# File lib/pry-remote-em.rb, line 34
def self.popen3(cmd, handler=nil, *args)
  klass = klass_from_handler(Connection, handler, *args)
  w     = Shellwords::shellwords(cmd)
  w.unshift(w.first) if w.first

  new_stderr = $stderr.dup
  rd, wr     = IO::pipe

  $stderr.reopen wr
  s = invoke_popen(w)
  $stderr.reopen new_stderr

  klass.new(s, *args).tap do |c|
    EM.attach(rd, Popen3StderrHandler, c)
    @conns[s] = c
    yield(c) if block_given?
  end
end