cvs commit: src UPDATING src/sys/sys param.h src/sys/net if.c if.h

[Brooks Davis]

On Mon, Aug 30, 2004 at 05:34:23PM -0400, Andrew Gallatin wrote:
> 
> Brooks Davis writes:
>  > 
>  > I don't think so.  The main offenders will be programs that walk the
>  > interface list via libkvm and programs that use struct if_data.
>  > ifconfig does neither.  If you haven't recompiled a module, a
>  > non-working ifconfig might result if by some miracle you didn't get a
>  > panic on attach.
> 
> ppc does not even build modules, so that's out.  An older ifconfig
> pukes, while a new one works, so some sort of kernel/userland ABI must
> have changed in the last week.  Has the data exported by sysctl changed
> recently?

I think I found it, at least partially.  The issue is struct if_msghdr
which is used by ifconfig.  It contains a struct if_data.  It has grown
by a struct timeval.  The weird thing is that this shouldn't be a
problem becuase if_msghdr has a length and my addition was to the end so
ifconfig should be able to skip over it, but it doesn't seem to actually
work.

-- Brooks

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