linux-kernel - RE: [PATCH 10/17] Tools: hv: Gather ipv[4,6] gateway information

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Date:	Tue, 24 Jul 2012 17:17:23 +0000
From:	KY Srinivasan <kys@...rosoft.com>
To:	Olaf Hering <olaf@...fle.de>,
	Stephen Hemminger <shemminger@...tta.com>
CC:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"virtualization@...ts.osdl.org" <virtualization@...ts.osdl.org>,
	"apw@...onical.com" <apw@...onical.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"ben@...adent.org.uk" <ben@...adent.org.uk>
Subject: RE: [PATCH 10/17] Tools: hv: Gather ipv[4,6] gateway information



> -----Original Message-----
> From: Olaf Hering [mailto:olaf@...fle.de]
> Sent: Tuesday, July 24, 2012 12:54 PM
> To: Stephen Hemminger
> Cc: KY Srinivasan; gregkh@...uxfoundation.org; linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; virtualization@...ts.osdl.org; apw@...onical.com;
> netdev@...r.kernel.org; ben@...adent.org.uk
> Subject: Re: [PATCH 10/17] Tools: hv: Gather ipv[4,6] gateway information
> 
> On Tue, Jul 24, Stephen Hemminger wrote:
> 
> > On Tue, 24 Jul 2012 09:01:34 -0700
> > "K. Y. Srinivasan" <kys@...rosoft.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.

I could have chosen to not specify the full path for the ip command and for that
matter all the external scripts I invoke from the KVP daemon. Do you mind if I 
submitted a patch to get rid of the absolute paths in this code.

Stephen's suggestion is clearly simpler (I don't need to invoke awk to filter what 
we want). Steve, I could make this change as well as an additional patch.

Regards,

K. Y