GUIDs in a C++ Linux GCC app

StackOverflow https://stackoverflow.com/questions/153676

  •  03-07-2019
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Question

I've got a bunch of servers running this Linux app. I'd like for them to be able to generate a GUID with a low probability of collision. I'm sure I could just pull 128 bytes out of /dev/urandom and that would probably be fine, but is there a simple & easy way to generate a GUID that is more equivalent to the Win32 one? Specifically, one that takes into account space (well, MAC address), time, and randomness? I don't want to call off the box for it, I just want something like CreateGuid()

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Solution

This Internet Draft describes one type of UUID in great details and I have used a similar approach with great success when I needed a UUID implementation and could not link to an existing library for architectural reasons.

This article provides a good overview.

OTHER TIPS

There is libuuid.

Look here: GUID Behind the Scenes

P.S. This is not a duplicate question - the best answer would point to a publicly available source.

If you are going to use something then an Internet standard would be a good idea:
Check out RFC (Request For Comment).

The one I know that is specific to GUID is: RFC 4122

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