netdev - Re: [iproute PATCH] Confirm success for each tc -batch command

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Message-ID: <20151103233552.GB26876@orbit.nwl.cc>
Date:	Wed, 4 Nov 2015 00:35:52 +0100
From:	Phil Sutter <phil@....cc>
To:	Stephen Hemminger <shemming@...cade.com>
Cc:	netdev@...r.kernel.org,
	Petr Písař <ppisar@...hat.com>
Subject: Re: [iproute PATCH] Confirm success for each tc -batch command

On Tue, Nov 03, 2015 at 12:46:21PM -0800, Stephen Hemminger wrote:
> On Thu, 29 Oct 2015 13:09:56 +0100
> Phil Sutter <phil@....cc> wrote:
> 
> > If `tc -force -batch' is fed by a controlling program from a pipe,
> > it's not possible to recognize when a command has been processes
> > successfully.
> > 
> > This patch adds an optional `-OK' option to the tc(8) tool, so `tc
> > -force -OK -batch' will print "OK\n" to standard output on each
> > successfully completed tc command.
> > 
> > Signed-off-by: Petr Písař <ppisar@...hat.com>
> > Signed-off-by: Phil Sutter <phil@....cc>
> 
> Why use batch mode if you are feeding it from a pipe?
> This seems like unnecessary feature creep.

This turned up when searching the list of iproute2 patches in RHEL6 for
unpublished changes. It dates back to a feature request from 2012 by a
customer who wanted to know when a command piped into tc was finished
processing. Looking at the ticket again, it appears you rejected this
patch in 2013 already. So I guess everything has been said but "sorry
for the noise"!

Cheers, Phil
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