func: static int socket_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
  
  {
  
      QEMUFileSocket *s = opaque;
  
      ssize_t len;
  
  
  
      do {
  
          len = qemu_recv(s->fd, buf, size, 0);
  
      } while (len == -1 && socket_error() == EINTR);
  
  
  
      if (len == -1)
  
          len = -socket_error();
  
  
  
      return len;
  
  }
  