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Date:   Thu, 21 Jul 2022 09:22:44 +0200 (CEST)
From:   Jan Engelhardt <jengelh@inai.de>
To:     Erik Skultety <eskultet@redhat.com>
cc:     netfilter-devel@vger.kernel.org
Subject: Re: [iptables PATCH] iptables: xshared: Ouptut '--' in the opt field
 in ipv6's fake mode
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References: <bb391c763171f0c5511f73e383e1b2e6a53e2014.1658322396.git.eskultet@redhat.com> <784718-9pp7-o170-or1q-rnns2802nqs@vanv.qr> <YtgzoIJngb5edrmu@nautilus.home.lan>
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On Wednesday 2022-07-20 18:56, Erik Skultety wrote:
>> 
>> If you or jc is to parse anything, it must only be done with the
>> iptables -S output form.
>
>Well, that would be a problem because 'jc' iptables plugin doesn't understand
>the -S output (isn't -S considered deprecated or I'm just halucinating?).

iptables-save loops over all tables, and its output can be fed back to
iptables-restore. That has existed for a long time.

Then at some point, -S was added, which is a subset of save-style
output for just one table or chain, but otherwise unchanged. Another
way of looking at it is that the -S command is like -L, but in
re-parsable syntax.

If anything, -L would be deprecated.