Linux-kernel mailing list archive 1999-25,: Re: System unique identifier.....

# Re: System unique identifier.....

Alan Cox (alan@lxorguk.ukuu.org.uk)
Sun, 20 Jun 1999 22:13:02 +0100 (BST)

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> Similar problems in Solaris are solved by finding the first ethernet
> MAC address (actually, just the 'localetheraddr' call) and synthesizing a
> WWN out of that. I'd like to do something a bit less hacky/invasive than
> this, avoiding all sorts of foolish layering things about going from one
> subsystem (SCSI, I/O, Mass Storage) to another (Networking).
>
> Surely this problem comes up for trying to do hostid kinds of things too.

There is a standard for it (which btw I think you will find Solaris uses)
its called UUID and you can find an RFC on it. Note btw that standard UUID's
have some interesting security issues if anonymity is designed. In the normal
case the out of the book algorithm is great

Alan

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