mkipipe.go

func makePipe(path string) (file *os.File, err error) {
	err = unix.Mkfifo(path, 0777)
	if err != nil {
		return nil, err
	}
	// mkfifo(3) states:
	//   "It is modified by the process's
	//   umask in the usual way: the permissions of the created file are
	//   (mode & ~umask)."
	// The pipe must be writeable by other users.
	err = os.Chmod(path, 0777)
	if err != nil {
		return nil, err
	}
	return os.OpenFile(path, os.O_CREATE|unix.O_NONBLOCK, os.ModeNamedPipe)
}