From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mp12.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by ms5.migadu.com with LMTPS id 2N/hOF/fl2JrvAAAbAwnHQ (envelope-from ) for ; Wed, 01 Jun 2022 23:51:28 +0200 Received: from aspmx1.migadu.com ([2001:41d0:2:bcc0::]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) by mp12.migadu.com with LMTPS id GL7XOF/fl2IlMAAAauVa8A (envelope-from ) for ; Wed, 01 Jun 2022 23:51:27 +0200 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 AE8CC46F28 for ; Wed, 1 Jun 2022 23:51:26 +0200 (CEST) Received: from localhost ([::1]:46084 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1nwWFR-0002Zz-RW for larch@yhetil.org; Wed, 01 Jun 2022 17:51:25 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:39482) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1nwWFA-0002ZV-BO for guix-devel@gnu.org; Wed, 01 Jun 2022 17:51:08 -0400 Received: from albert.telenet-ops.be ([2a02:1800:110:4::f00:1a]:51608) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1nwWF2-0006HC-Oz for guix-devel@gnu.org; Wed, 01 Jun 2022 17:51:05 -0400 Received: from ptr-bvsjgyhxw7psv60dyze.18120a2.ip6.access.telenet.be ([IPv6:2a02:1811:8c09:9d00:3c5f:2eff:feb0:ba5a]) by albert.telenet-ops.be with bizsmtp id dxqv270084UW6Th06xqvL7; Wed, 01 Jun 2022 23:50:56 +0200 Message-ID: <0ed97ec94facf684e9b50d716e736185b26f8111.camel@telenet.be> Subject: Re: A corner case of broken reproducibility From: Maxime Devos To: raingloom Cc: Ludovic =?ISO-8859-1?Q?Court=E8s?= , Felix Lechner , Guix Devel Date: Wed, 01 Jun 2022 23:50:51 +0200 In-Reply-To: <20220601224113.52e92744@riseup.net> References: <87leuj108h.fsf@gnu.org> <31d13a6014b14c886686bca833d926604ce3379d.camel@telenet.be> <87bkvcuynd.fsf@gnu.org> <6b761f22d333b0acd21f407a9f5f529aaa8b16d5.camel@telenet.be> <20220601224113.52e92744@riseup.net> Content-Type: multipart/signed; micalg="pgp-sha512"; protocol="application/pgp-signature"; boundary="=-8FXnqXeCgKSD/8KazSwX" User-Agent: Evolution 3.38.3-1 MIME-Version: 1.0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=telenet.be; s=r22; t=1654120256; bh=Jhiqw20IJlwkfXN+x4b3Z96Ir9H94t487yq4KgqSLqo=; h=Subject:From:To:Cc:Date:In-Reply-To:References; b=dJwJxlO0AR2yAgJiPC8yScqBzIhxNm+YyAQdlHcJvewKNC540/eunqs/FS5dTMD+B kHTZXeRyvG7GvSSgIvWaCOo39RdSEYuliMoAUwFQ+jtucJT44CaETAZ48SgEL9bxxy lNWL3So/dW8ply+zV4pwprEUmKdBwrgmBMLWNokFuz/uBi4+Ibs8eTUGfApznKHC5R 9gXdvZgPVgAD20pZNmPFh1U+2nUhNMfvp840YtYng2nPEF6E03RBgKYKpGvolphvLW GUzixN6zQqge8wH/YA+ORG1pVx+9mh3qq6JWsB2QXglcQeMmC6SGnpTxTNTAq7F6FZ 1xUAfCfiUAdKQ== Received-SPF: pass client-ip=2a02:1800:110:4::f00:1a; envelope-from=maximedevos@telenet.be; helo=albert.telenet-ops.be X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 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, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: guix-devel@gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+larch=yhetil.org@gnu.org Sender: "Guix-devel" X-Migadu-Flow: FLOW_IN X-Migadu-To: larch@yhetil.org X-Migadu-Country: US ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=yhetil.org; s=key1; t=1654120286; h=from:from:sender:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references:list-id:list-help:list-unsubscribe: list-subscribe:list-post:dkim-signature; bh=Jhiqw20IJlwkfXN+x4b3Z96Ir9H94t487yq4KgqSLqo=; b=ab3MM6VYMju3YUNuI4cq8VmmIh/2DYPOswUwHqPcx/wsNQIYD4di6XxrQXrEu7VOBSBgny 5ScsJLK/n8rC/eDcmV3ZuHUwP9JkL/3qoxZy4uC8Cb+9Fky42ekRRE/PtFXqsjFTCq1pWN QaTTiL6VMx82dwEXRwM2nBT1i568Rz+3dyVdgjp9ynWJH3kep5aXhwNFvaYcneTZV/R6Cv /BR6mVEDVo/pGwhHXGRcyDjpe52psk2nQ1xwpvIK785bBW9J17YAyvICvT0HfhOL44nR6e 0zZHplfvuhYKpmstPHDvNTlnJV7C+uElrH48HypajfwVW+cb/WMyauXCWIaSFg== ARC-Seal: i=1; s=key1; d=yhetil.org; t=1654120286; a=rsa-sha256; cv=none; b=FWXNR48m1guBHgr8UO9QjbitbdZqmpxK5ELCkdlz/PyX5CMR4ERkwqAV6EY4fOrY/wjeBb kIMySU8FzPd+/LXJGHfSxCPikbLdytN4o3e7Jbd0i2BTTGJljjfe+n2JENQcF3oGpf4vbe P6b3he3Ne+mp9R+OPXsNCjwyH3hPv5Q3SriY1BH7X5MWUvlWqcQoX1oFYC4AxFWkQCABj3 o1tqRFvRdrW3lLwehKaT4RZWhBisoqC687BrwO9J/aVxWshPosKkt7tjGLQp3jCm3o7hvQ AfqpqgsYazx/blhxj8f1ewRr6UjC1s99IKnF64A++37rLkjc0wJ9YaxtHrpbcQ== ARC-Authentication-Results: i=1; aspmx1.migadu.com; dkim=pass header.d=telenet.be header.s=r22 header.b=dJwJxlO0; dmarc=pass (policy=none) header.from=telenet.be; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -10.23 Authentication-Results: aspmx1.migadu.com; dkim=pass header.d=telenet.be header.s=r22 header.b=dJwJxlO0; dmarc=pass (policy=none) header.from=telenet.be; spf=pass (aspmx1.migadu.com: domain of "guix-devel-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="guix-devel-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: AE8CC46F28 X-Spam-Score: -10.23 X-Migadu-Scanner: scn0.migadu.com X-TUID: F6URa4f9+XWQ --=-8FXnqXeCgKSD/8KazSwX Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable raingloom schreef op wo 01-06-2022 om 22:41 [+0200]: > Could we instead check for existing homes and set uids in > /etc/passwd based on that instead? That's practically O(1), but is a > bit more involved. For this to work, the home directory may not be changed. As Ludo wrote (albeit about user names, not home directories): > How do you know that user =E2=80=9Cmaxime=E2=80=9D created today is =E2= =80=9Cthe same=E2=80=9D as > that =E2=80=9Cmaxime=E2=80=9D deleted a while back? You can=E2=80=99t. Maybe it's an option, but there are other complications as well that need to be resolved somehow. --=-8FXnqXeCgKSD/8KazSwX Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part Content-Transfer-Encoding: 7bit -----BEGIN PGP SIGNATURE----- iI0EABYKADUWIQTB8z7iDFKP233XAR9J4+4iGRcl7gUCYpffOxccbWF4aW1lZGV2 b3NAdGVsZW5ldC5iZQAKCRBJ4+4iGRcl7vkxAP4vTzOBBChCeoCqKKNOg/k8/hxf FvpYdadJlLBTXQ95+QD/etzoRymVphFaHyjpGZGYHnR7IH6EwQcMuLPwxq9cMAo= =w/nQ -----END PGP SIGNATURE----- --=-8FXnqXeCgKSD/8KazSwX--