Re: [SeaBIOS] [PATCH] enable_vga_console(): print machine UUID under seabios version message

[Laszlo Ersek]

On 12/11/12 15:52, Gerd Hoffmann wrote:
> > > Also even with qemu the uuid might not be set (just start qemu without
> > > -uuid $something), that case needs to be handled too.  Easiest is
> > > probably to just not print it when not preset.
> >
> > How can I distinguish "unset" from "set to all zeros"?
>
> "set to all zeros" equals "unset", no?
> I doubt all zeros is a valid uuid in the first place ...

Correct. I started reading the SMBIOS spec, and "Table 3 – Required
Structures and Data" says

[...]
  System Information (Type 1)  [...] UUID field identifies the system’s
                               non-zero UUID value. [...]
  [...]

Thanks!
Laszlo