Re: [PATCH 10/17] Tools: hv: Gather ipv[4,6] gateway information

Dan Williams
2012-07-24T18:35:58Z

On Tue, 2012-07-24 at 09:56 -0700, Stephen Hemminger wrote:
> On Tue, 24 Jul 2012 18:53:59 +0200
> Olaf Hering <olaf@aepfle.de> wrote:
>
> > On Tue, Jul 24, Stephen Hemminger wrote:
> >
> > > On Tue, 24 Jul 2012 09:01:34 -0700
> > > "K. Y. Srinivasan" <kys@microsoft.com> wrote:
> > >
> > > > + memset(cmd, 0, sizeof(cmd));
> > > > + strcat(cmd, "/sbin/ip -f inet route | grep -w ");
> > > > + strcat(cmd, if_name);
> > > > + strcat(cmd, " | awk '/default/ {print $3 }'");
> > >
> > >
> > > Much simpler method:
> > >
> > > ip route show match 0/0
> >
> > This also has the benefit that ip is not called with absolute path, now
> > that distros move binaries around.
> >
> > Olaf
>
> It is also not hard to do the same thing with a little function
> using libmnl

Yeah seriously, netlink anyone? You'll even get nicer error reporting
that way.

Dan