1

我有以下代码返回错误号 22。我在任何地方都找不到 22 指的是什么，有人能指出我可能在哪里找到吗？

  if (setsockopt(sock, IPPROTO_TCP, TCP_NODELAY,
                 (char *)&arg, sizeof(arg)) < 0) {
    log.debug("unable to setsockopt TCP_NODELAY: %d", errorNumber());
    return false;
  }
4

2 回答 2

2

Its defined in errno.h or somewhere close to it. I would guess it to be EINVAL, but its really implementation dependent. You should check your return values with error code defines, not numeric values.

于 2012-04-26T09:20:42.503 回答
1

It's system specific.

Use e.g. strerror(3), strerror_r(3) or perror(3) to see error description.

于 2012-04-26T09:21:00.597 回答