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Re: [libvirt] [PATCH] Introduce virt-console



On Thu, Jan 15, 2009 at 01:27:00PM +0000, John Levon wrote:
> On Thu, Jan 15, 2009 at 01:15:13PM +0000, Richard W.M. Jones wrote:
> 
> > We really should go by features detected in configure, not assumptions
> > about the platform which may not even be true.
> 
> That's my point. They are true, and they always will be. In fact, it's
> MUCH safer in these cases to check __sun. I can't check for stropts.h,
> since someone might have installed that icky STREAMS stuff on Linux,
> which would then break.

Doesn't working STREAMS exist on UnixWare too?  I still think the
right thing to do is to detect STREAMS.  If someone installs broken
STREAMS on Linux, then it is their responsibility to find a more
discrete test which differentiates between broken STREAMS and working
STREAMS on Solaris/UnixWare.

> I can't check for priv.h, since it's generic
> enough to exist in different form on other platforms. Even if least priv
> in the exact Solaris form gets ported to say BSD, it won't have
> __init_suid_priv(), for example.

Right, but don't just check for the header.  Check for both the
header and some common symbol inside it.

> Of course, my preferred fix would be for Solaris to drop STREAMS, but
> that's a vain hope :)

There's the problem - if Solaris drop streams, the #ifdef __sun checks
will be incorrect.

Rich.

-- 
Richard Jones, Emerging Technologies, Red Hat  http://et.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.
http://et.redhat.com/~rjones/virt-top


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