> >I know that one is kernel-internal and one is userspace. Thanks for
> >pointing out its renaming, I was not aware of this. Why is this
> >information not combined and put in /usr/include/net/socket.h where
> >both domains can see it? It is shared information.
>
> The /usr/include/net directory is not shared between kernel and libc
> on modern systems.
>
> It would be possible to split those definitions out into a new
> <linux/something> header from where both linux/socket.h and
> bits/socket.h could use them, but that would introduce extra
> versioning interdependencies between kernel and libc, and to be
> honest it doesn't hurt all that much to maintain two copies.
It doesn't hurt, except when I find it is already defined in one place
as 15 (kernel) and in the other place as 18 (userland) and the only
way I figure it out is to start instrumenting things to find out what
values it picked up for various macros only to discover that the same
macro has a completely different value in the kernel scope than it
does in userland scope...sigh.
> p.
slainte mhath, RGB
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