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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: imnozi@gmail.com
Cc: netfilter-devel@vger.kernel.org, netfilter@vger.kernel.org
Subject: Re: [nftables/nft] nft equivalent of "ipset test"
Date: Wed, 18 Oct 2023 11:36:37 +0200	[thread overview]
Message-ID: <ZS+nJS/4dolCsIk8@calendula> (raw)
In-Reply-To: <20231017200057.57cfce21@playground>

On Tue, Oct 17, 2023 at 08:00:57PM -0400, imnozi@gmail.com wrote:
> On Wed, 18 Oct 2023 00:36:37 +0200
> "U.Mutlu" <um@mutluit.com> wrote:
> 
> > ...
> > Actualy I need to do this monster:   :-)
> > 
> > IP="1.2.3.4"
> > ! nft "get element inet mytable myset  { $IP }" > /dev/null 2>&1 && \
> > ! nft "get element inet mytable myset2 { $IP }" > /dev/null 2>&1 && \
> >    nft "add element inet mytable myset  { $IP }"
> 
> Try using '||', akin to:

Please, use 'nft create' for this, no need for an explicit test and
then add from command line.

The idiom above is an antipattern, because it is not atomic, the
'create' command provides a way to first test if the element exists
(if so it fails) then add it.

  reply	other threads:[~2023-10-18  9:36 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-17 17:11 [nftables/nft] nft equivalent of "ipset test" U.Mutlu
2023-10-17 21:35 ` Florian Westphal
2023-10-17 21:55   ` U.Mutlu
2023-10-17 22:05     ` Florian Westphal
2023-10-17 22:36       ` U.Mutlu
2023-10-18  0:00         ` imnozi
2023-10-18  9:36           ` Pablo Neira Ayuso [this message]
2023-10-18  9:54             ` U.Mutlu
2023-10-18 10:00               ` Pablo Neira Ayuso
2023-10-18 11:07                 ` U.Mutlu
2023-10-18 11:49                   ` Pablo Neira Ayuso
2023-10-18 13:03                     ` U.Mutlu
2023-10-18 14:37                   ` Phil Sutter
2023-10-18 11:54               ` Kerin Millar
2023-10-18  9:23         ` Pablo Neira Ayuso

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