From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp1 ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms11 with LMTPS id pofFGXV4kF/ZLAAA0tVLHw (envelope-from ) for ; Wed, 21 Oct 2020 18:05:41 +0000 Received: from aspmx1.migadu.com ([2001:41d0:2:4a6f::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp1 with LMTPS id 4E5NFXV4kF+0UwAAbx9fmQ (envelope-from ) for ; Wed, 21 Oct 2020 18:05:41 +0000 Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by aspmx1.migadu.com (Postfix) with ESMTPS id 2010E9404D1 for ; Wed, 21 Oct 2020 18:05:40 +0000 (UTC) Received: from localhost ([::1]:46288 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kVIUT-0001v7-FH for larch@yhetil.org; Wed, 21 Oct 2020 14:05:39 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59552) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kVIU0-0001tm-1D for help-guix@gnu.org; Wed, 21 Oct 2020 14:05:08 -0400 Received: from tobias.gr ([2a02:c205:2020:6054::1]:43880) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kVITv-0001rk-Nk for help-guix@gnu.org; Wed, 21 Oct 2020 14:05:07 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=tobias.gr; s=2018; bh=fiMSu0XrqYgYQ9kP6qyuxoSg86f7OvdJScXHMEf0wf8=; h=date:in-reply-to: references:subject:cc:to:from; b=JKd2ITFO89s7lXA58zwdBpLFknRrIX3hxmfDQ +v2mewLdoGGsD1xsg3fpoRo8PH5QKr2pG90wmn3jpfpGVtrRro8idsW/WYrZFYtpM6w0Gs NTMX4sobsVZzozYDYEQDaBtagauu1ESuTJ4XTGBu8PctOoK2PymikFHTsahoCk4C0HTk95 E8a24xNVKNPuCZVUgzoNb89v4vrnuODFDQgXd7aCULrk33G71flC1qvdMdd0tCUxEGGqrz +6Cva9QRPOm6lELF0ZjhVw9KerVGwdGJsxR7isV5iU1DZ3DVwHgvFJsV4uRu5o8RxhPJgn fzzPh6ptvZywAggqzI/QTk5wQ== Received: by submission.tobias.gr (OpenSMTPD) with ESMTPSA id c328df4c (TLSv1.2:ECDHE-ECDSA-AES256-GCM-SHA384:256:NO); Wed, 21 Oct 2020 18:05:14 +0000 (UTC) BIMI-Selector: v=BIMI1; s=default; From: Tobias Geerinckx-Rice To: Martin Michel Cc: help-guix@gnu.org Subject: Re: Modification date of /gnu/store files is 1970-01-01 References: <20201021155354.r5iinhpzoxk2yqev@remote.famic.de> In-reply-to: <20201021155354.r5iinhpzoxk2yqev@remote.famic.de> Date: Wed, 21 Oct 2020 20:05:03 +0200 Message-ID: <87wnzj8ng0.fsf@nckx> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha512; protocol="application/pgp-signature" Received-SPF: pass client-ip=2a02:c205:2020:6054::1; envelope-from=me@tobias.gr; helo=tobias.gr X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: help-guix@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: help-guix-bounces+larch=yhetil.org@gnu.org Sender: "Help-Guix" X-Scanner: scn0 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=tobias.gr header.s=2018 header.b=JKd2ITFO; dmarc=pass (policy=reject) header.from=tobias.gr; spf=pass (aspmx1.migadu.com: domain of help-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=help-guix-bounces@gnu.org X-Spam-Score: -3.31 X-TUID: KNrXMgl5DqKq --=-=-= Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Martin, Martin Michel =E5=86=99=E9=81=93=EF=BC=9A > So far so good, but I could not figure out what is wrong with=20 > the file system entries of /gnu/store. All entries there have a=20 > timestamp of UNIX epoch 0. Well spotted! This is intentional. The Guix daemon[0] changes=20 all timestamps of all files added to the store to a known value.=20 Same for other metadata like ownership and some permission bits. If it did not, certain software could (and does) behave=20 differently between two different machines with otherwise=20 identical stores. Kind regards, T G-R [0]: Inherited from Nix and still in C++:=20 http://git.savannah.gnu.org/cgit/guix.git/tree/nix/libstore/local-store.hh#= n293 --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iIMEARYKACsWIQT12iAyS4c9C3o4dnINsP+IT1VteQUCX5B4Tw0cbWVAdG9iaWFz LmdyAAoJEA2w/4hPVW15UlYA/1i0KHMafqe6HxryfaH88xHx41UZCxWqd/LgUuIR oA9FAP4hZHqkXMFcpegc+64lybVhpD1SZsAHTmxxOGnpJIAfBA== =33Bj -----END PGP SIGNATURE----- --=-=-=--