popen_run

# File lib/open3.rb, line 194
 def popen_run(cmd, opts, child_io, parent_io) # :nodoc:
 if last = Hash.try_convert(cmd.last)
 opts = opts.merge(last)
 cmd.pop
 end
 pid = spawn(*cmd, opts)
 wait_thr = Process.detach(pid)
 child_io.each(&:close)
 result = [*parent_io, wait_thr]
 if defined? yield
 begin
 return yield(*result)
 ensure
 parent_io.each(&:close)
 wait_thr.join
 end
 end
 result
 end