軟體能區分臺式電腦和膝上型電腦嗎？

在安裝程式的方式和位置上，許多軟體許可證都有相當嚴格的限制，但是這些程式在確定安裝在哪種型別的裝置上有多好呢？今天的超級使用者問答帖子回答了一位好奇的讀者的問題。...

在安裝程式的方式和位置上，許多軟體許可證都有相當嚴格的限制，但是這些程式在確定安裝在哪種型別的裝置上有多好呢？今天的超級使用者問答帖子回答了一位好奇的讀者的問題。

今天的問答環節是由SuperUser提供的，SuperUser是Stack Exchange的一個分支，是一個由社群驅動的問答網站分組。

照片由羅伯特（Flickr）提供。

問題

超級使用者讀者Abhi想知道軟體是否真的能區分臺式電腦和膝上型電腦：

A license for CPU-intensive software like Pix4D says that it can be installed on two devices, but with one condition. Reading the fine print, it seems that one device can be a full-processing desktop/workstation whereas the second one must be a laptop or mobile device.

How would the software know what type of device it is installed on? Are there giveaways in the hardware specificati*** for determining something like this (i.e. the presence of a battery)?

Given that the software is fully functional on both devices, would this condition become irrelevant if I just buy a high-end laptop which is just as fast as the desktop?

軟體真的能區分臺式電腦和膝上型電腦嗎？

答案

超級使用者貢獻者abnev和Technik Empire為我們提供了答案。首先，阿布涅夫：

On Linux, you can run the following command:

sudo dmidecode –string chassis-type

On a laptop, this will return laptop, notebook, portable, or sub-notebook (depending on the manufacturer).

For Windows, refer to the following TechNet documentation to determine your computer chassis type: Identifying the Chassis Type of a Computer

然後是Technik帝國的答案：

To add to the other answer here regarding Linux, Windows software can also access this information through various provided WinAPI methods/objects. One such example is Win32_ComputerSystem, which among others, has members like:

Possible values include:

As for how Windows knows this, while I cannot say with certainty because I presently lack both the Windows source code and any official documentation links, I would say it is a simple matter of the hardware ID’s within the computer giving this information away to the operating system.

Since Windows has a massive partner network that submits their drivers directly to Microsoft (for driver updates via Windows Update and “standard” drivers to include with installation media), it is pretty easy for Windows to figure out precisely what kind of computer you have it installed on. Just by the CPU ID alone, you could determine whether it is a desktop computer or a laptop.

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