[libvirt] [PATCH 13/15] util: Replace pciWaitForDeviceCleanup with a stub on Windows

Daniel P. Berrange berrange at redhat.com
Mon Mar 22 17:51:35 UTC 2010

On Mon, Mar 22, 2010 at 10:54:09AM -0600, Eric Blake wrote:
> On 03/22/2010 09:03 AM, Daniel P. Berrange wrote:
> > On Mon, Mar 22, 2010 at 02:25:43AM +0100, Matthias Bolte wrote:
> >> sscanf doesn't support the L modifier on Windows and gnulib has no
> >> replacement for the scanf functions. Just replace the function with
> >> a stub on Windows, because it's not used on the libvirt client side.
> >> ---
> >>  src/util/pci.c |   14 ++++++++++++++
> >>  1 files changed, 14 insertions(+), 0 deletions(-)
> > 
> > We already had this problem with printf(). For that gnulib provided
> > us with a replacement that worked. We should probably pull in the
> > scanf module from gnulib for equivalent compatability. Even though
> > this code isn't technically required, other places may start using
> > scanf & trip up on this problem
> But that's the point that Matthias made - currently, gnulib does NOT
> provide a scanf module.  Why?  Because scanf comes with its own set of
> usability pitfalls (scanf("%d",&int) cannot report whether integer
> overflow occurred), so no one has made it a high enough priority to
> start replacing the portability pitfalls.

Oh, I mis-read the original description!

> I've already mentioned that it would be a better cleanup to stop using
> *scanf altogether; but that would be an independent cleanup, unrelated
> to this particular patch.
> For this particular patch, mingw also lacks /proc/iomem, so the fopen
> earlier in pciWaitForDeviceCleanup should have already failed before we
> ever get to the problematic sscanf("%Lx").  Therefore, do we even need
> this patch?

I don't think its high priority to merge this, since its not an actual
compile failure - I agree we'd be better to just kill off the use of 
scanf() altogether

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