From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.svario.it (mail.svario.it [IPv6:2a02:2770:13::112:0:1]) by sourceware.org (Postfix) with ESMTPS id 8FD723858D32 for ; Mon, 27 Feb 2023 17:15:04 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 8FD723858D32 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=svario.it Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=svario.it Received: from [IPV6:2a01:c23:6ca5:7800:c4d:8462:3bee:6ce2] (dynamic-2a01-0c23-6ca5-7800-0c4d-8462-3bee-6ce2.c23.pool.telefonica.de [IPv6:2a01:c23:6ca5:7800:c4d:8462:3bee:6ce2]) by mail.svario.it (Postfix) with ESMTPSA id 20DC1D1F33; Mon, 27 Feb 2023 18:15:03 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=svario.it; s=201710; t=1677518103; bh=Ivdx41fryqZ0frh5/RgSXQb1nlZLXoJ/eST7itIoEzk=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=pdafzQSjAs4+nVyh8yIjdatXKsnhw/0wwtgNVYOVcdEM5g/MMDshL/r3g//FTEK+B /iCEDY7T0fC8VNMlLdws2ubpgWYGr8G2kDJA0PdByOHrS3I8qBgIhJdAWg7kKNZCiq g9KKshhPVslL4yyBGOfRGkm/5udCOBAuHwy2ki0v3wpLR8sX7cZwDVHuo66q9Gp8PC HvYuWT0rGBirmjeC1W4Ube3AwTgiY02wrBLYwWRYGLzujC4E6Ku4Gt3ZQR28vWf0AS OctCXF80BWIXI4gSsETlouUZiJqQk5oq4aJOeCXtyqJQBvSpKU9gkmYu6itXTaToBS mNRHX38+6yfqA== Content-Type: multipart/mixed; boundary="------------d1PjQtov09LATCwDruZ0L3w9" Message-ID: <9af13f7f-6633-6552-c572-92a45c80c743@svario.it> Date: Mon, 27 Feb 2023 18:15:02 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Subject: Re: [PATCH] dtrace: Use deterministic temp file creation for all temp files Content-Language: en-US To: Florian Weimer Cc: Gioele Barabucci via Systemtap References: <6bfff40c-2c4b-c119-116d-7834310299d7@svario.it> <87fsarm7m5.fsf@oldenburg.str.redhat.com> <3de411c4-8cbd-667b-a64e-aeeac297ea94@svario.it> <87356rm4wx.fsf@oldenburg.str.redhat.com> From: Gioele Barabucci In-Reply-To: <87356rm4wx.fsf@oldenburg.str.redhat.com> X-Spam-Status: No, score=-12.2 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,NICE_REPLY_A,SPF_HELO_PASS,SPF_PASS,TXREP,WEIRD_QUOTING autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: This is a multi-part message in MIME format. --------------d1PjQtov09LATCwDruZ0L3w9 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 27/02/23 17:47, Florian Weimer wrote: >>> It might be more robust to use a dedicated temporary directory and a >>> predictable file name under that directory. >> >> Doesn't this suffer from the same issue? If dtrace finds that >> predictable dir/file path it will exit (impeding a second run). Or am >> I missing something? > > The idea is to use a predictable file name in a temporary directory with > an unpredictable name (created using mkdtemp or one of the higher-level > facilities). You're right, that could work: only the basename is embedded in the ELF data, not the full path. Untested patch attached -- Gioele Barabucci --------------d1PjQtov09LATCwDruZ0L3w9 Content-Type: text/x-patch; charset=UTF-8; name="0002-dtrace-Use-directory-random-directory-instead-of-bus.patch" Content-Disposition: attachment; filename*0="0002-dtrace-Use-directory-random-directory-instead-of-bus.pa"; filename*1="tch" Content-Transfer-Encoding: base64 RnJvbSBjMzcxMzI5Y2MyMGVlNGJlMDBjNmU4NWZhYmRjMGQ2MWIzNGJmMDYzIE1vbiBTZXAg MTcgMDA6MDA6MDAgMjAwMQpGcm9tOiBHaW9lbGUgQmFyYWJ1Y2NpIDxnaW9lbGVAc3Zhcmlv Lml0PgpEYXRlOiBNb24sIDI3IEZlYiAyMDIzIDE4OjEyOjEyICswMTAwClN1YmplY3Q6IFtQ QVRDSCAyLzJdIGR0cmFjZTogVXNlIGRpcmVjdG9yeSByYW5kb20gZGlyZWN0b3J5IGluc3Rl YWQgb2YgYnVzeQogd2FpdGluZwoKLS0tCiBkdHJhY2UuaW4gfCAyNSArKysrKysrKysrKy0t LS0tLS0tLS0tLS0tCiAxIGZpbGUgY2hhbmdlZCwgMTEgaW5zZXJ0aW9ucygrKSwgMTQgZGVs ZXRpb25zKC0pCgpkaWZmIC0tZ2l0IGEvZHRyYWNlLmluIGIvZHRyYWNlLmluCmluZGV4IDIy YzFhOWQwMy4uYTIwZmI1YzRhIDEwMDY0NAotLS0gYS9kdHJhY2UuaW4KKysrIGIvZHRyYWNl LmluCkBAIC0yNiw2ICsyNiw3IEBAIGltcG9ydCBzeXMKIGltcG9ydCB0aW1lCiBpbXBvcnQg YXRleGl0CiBmcm9tIHNobGV4IGltcG9ydCBzcGxpdAorZnJvbSB0ZW1wZmlsZSBpbXBvcnQg bWtkdGVtcAogZnJvbSBzdWJwcm9jZXNzIGltcG9ydCBjYWxsCiB0cnk6CiAgICAgZnJvbSBw eXBhcnNpbmcgaW1wb3J0IGFscGhhcywgY1N0eWxlQ29tbWVudCwgZGVsaW1pdGVkTGlzdCwg R3JvdXAsIFwKQEAgLTM2LDYgKzM3LDggQEAgdHJ5OgogZXhjZXB0IEltcG9ydEVycm9yOgog ICAgIEhBVkVfUFlQID0gRmFsc2UKIAorVEVNUF9ESVIgPSBOb25lCisKIAogIyBDb21tb24g ZmlsZSBjcmVhdGlvbiBtZXRob2RzIGZvciBweXBhcnNpbmcgYW5kIHN0cmluZyBwYXR0ZXJu IG1hdGNoaW5nCiAKQEAgLTI4MiwyMCArMjg1LDkgQEAgZGVmIG1rdGVtcF9kZXRlcm0oc291 cmNlcywgc3VmZml4KToKICAgICBzaGEgPSBoYXNobGliLnNoYTI1NigpCiAgICAgZm9yIHNv dXJjZSBpbiBzb3VyY2VzOgogICAgICAgICBzaGEudXBkYXRlKHNvdXJjZS5lbmNvZGUoJ3V0 Zi04JykpCi0gICAgZm5hbWUgPSAiLmR0cmFjZS10ZW1wLiIgKyBzaGEuaGV4ZGlnZXN0KClb OjhdICsgc3VmZml4Ci0gICAgdHJpZXMgPSAwCi0gICAgd2hpbGUgVHJ1ZToKLSAgICAgICAg dHJpZXMgKz0gMQotICAgICAgICBpZiB0cmllcyA+IDEwMDogIyBpZiBmaWxlIGV4aXN0cyBk dWUgdG8gcHJldmlvdXMgY3Jhc2ggb3Igd2hhdGV2ZXIKLSAgICAgICAgICAgIHJhaXNlIEV4 Y2VwdGlvbigiY2Fubm90IGNyZWF0ZSB0ZW1wb3JhcnkgZmlsZSBcIiIrZm5hbWUrIlwiIikK LSAgICAgICAgdHJ5OgotICAgICAgICAgICAgd3htb2RlID0gJ3gnIGlmIHN5cy52ZXJzaW9u X2luZm8gPiAoMywwKSBlbHNlICd3eCcKLSAgICAgICAgICAgIGZkZXNjID0gb3BlbihmbmFt ZSwgbW9kZT13eG1vZGUpCi0gICAgICAgICAgICBicmVhawotICAgICAgICBleGNlcHQgRmls ZUV4aXN0c0Vycm9yOgotICAgICAgICAgICAgdGltZS5zbGVlcCgwLjEpICMgdmFndWUgZXN0 aW1hdGUgb2YgZWxhcHNlZCB0aW1lIGZvciBjb25jdXJyZW50IGlkZW50aWNhbCBnY2Mgam9i Ci0gICAgICAgICAgICBwYXNzICMgVHJ5IGFnYWluCi0KKyAgICBmbmFtZSA9IFRFTVBfRElS ICsgIi8uZHRyYWNlLXRlbXAuIiArIHNoYS5oZXhkaWdlc3QoKVs6OF0gKyBzdWZmaXgKKyAg ICB3eG1vZGUgPSAneCcgaWYgc3lzLnZlcnNpb25faW5mbyA+ICgzLDApIGVsc2UgJ3d4Jwor ICAgIGZkZXNjID0gb3BlbihmbmFtZSwgbW9kZT13eG1vZGUpCiAgICAgcmV0dXJuIGZkZXNj LCBmbmFtZQogCiAKQEAgLTMyNiw2ICszMTgsNyBAQCBkZWYgbWFpbigpOgogICAgICAgICBy ZXR1cm4gMQogCiAgICAgZ2xvYmFsIEhBVkVfUFlQCisgICAgZ2xvYmFsIFRFTVBfRElSCiAg ICAgaSA9IDEKICAgICBidWlsZF9oZWFkZXIgPSBGYWxzZQogICAgIGJ1aWxkX3NvdXJjZSA9 IEZhbHNlCkBAIC0zODAsNiArMzczLDcgQEAgZGVmIG1haW4oKToKICAgICAgICAgdXNhZ2Uo KQogICAgICAgICByZXR1cm4gMQogCisgICAgVEVNUF9ESVIgPSBta2R0ZW1wKCkKICAgICBp ZiBzX2ZpbGVuYW1lICE9ICIiIGFuZCB1c2VfY3BwOgogICAgICAgICAoaWdub3JlLCBmbmFt ZSkgPSBta3RlbXBfZGV0ZXJtKFsidXNlX2NwcCIsIHNfZmlsZW5hbWVdLCBzdWZmaXg9Ii5k IikKICAgICAgICAgY3BwID0gb3MuZW52aXJvbi5nZXQoIkNQUCIsICJjcHAiKQpAQCAtNDU4 LDYgKzQ1Miw5IEBAIGRlZiBtYWluKCk6CiAgICAgICAgIGVsc2U6CiAgICAgICAgICAgICBw cmludCgiY3BwOiAiICsgc19maWxlbmFtZSkKIAorICAgIGlmIG5vdCBrZWVwX3RlbXBzOgor ICAgICAgICBvcy5ybWRpcihURU1QX0RJUikKKwogICAgIHJldHVybiAwCiAKIGlmIF9fbmFt ZV9fID09ICJfX21haW5fXyI6Ci0tIAoyLjM5LjIKCg== --------------d1PjQtov09LATCwDruZ0L3w9--