聊聊 Apache 开源协议

现在开源社区常用的开源协议有 MIT License 、 GPL 、 Apache License 。但是想必大家都没有完整的看过开源协议内容吧，其实之前我自己也没有看过，毕竟全英文又不是什么技术文档，谁去看那东西。

不过没关系，花了一个多星期，我已经把Apache License翻译了一遍，大家可以看 这里 ，其他的一些主流开源协议也将陆续翻译出来。

“Linux kernel 的版权是 GPL。 这下问题来了：如果你是硬件厂商，希望你的硬件能在 Linux kernel 下运作，那么就必须要有驱动程序。如果驱动程序的程序代码公开，等于硬件规格也公开的差不多了。许多厂商不愿意这么做，所以就提供编好的驱动程序，但不提 供原始码。 Android 的重点就是商业应用，Google采用了一些手法来绕过这问题。他们把驱动程序移到 “userspace”，也就是说，把驱动程序变成在 Linux kernel 上头跑，而不是一起跑的东西，这样就可以避过GPL。然后，在 kernel 这边开个小门，让本来不能直接控制到硬件的 “userspace” 程序也可以碰得到，这样只要把”开个小门”的程序代码公布就行啦。”

这就又说回了我们今天的问题：开源协议有什么不同。

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