module EventMachine

feed stderr into connection’s receive_stderr()

Public Class Methods

popen3b(cmd, handler=nil, *args) { |connection| ... } click to toggle source

# File lib/panoptimon/eventmonkeypatch/popen3.rb, line 15
def self.popen3b(cmd, handler=nil, *args)
  klass = klass_from_handler(Connection, handler, *args)
  raise "no command?" unless cmd.first
  cmd.unshift(cmd.first) # -> execvp

  original_stderr = $stderr.dup

  begin
    rd, wr     = IO.pipe

    $stderr.reopen wr
    s = invoke_popen(cmd)
    $stderr.reopen original_stderr

    connection = klass.new(s, *args)
    EM.attach(rd, StderrHandler, connection)
    @conns[s] = connection
    yield(connection) if block_given?
    connection
  rescue
    $stderr.reopen(original_stderr)
    raise $!
  end
end