Paul Eggert <eggert@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Paul Eggert <eggert@HIDDEN>
to control <at> debbugs.gnu.org.
Full text available.Debbugs Internal Request <help-debbugs@HIDDEN>
to internal_control <at> debbugs.gnu.org.
Full text available.Received: (at 76452-done) by debbugs.gnu.org; 22 Feb 2025 06:11:36 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Feb 22 01:11:35 2025 Received: from localhost ([127.0.0.1]:44476 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tlije-0007Wj-La for submit <at> debbugs.gnu.org; Sat, 22 Feb 2025 01:11:35 -0500 Received: from mail.cs.ucla.edu ([131.179.128.66]:39782) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eggert@HIDDEN>) id 1tlija-0007VN-LB for 76452-done <at> debbugs.gnu.org; Sat, 22 Feb 2025 01:11:31 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id 3E1603C011BD8; Fri, 21 Feb 2025 22:11:24 -0800 (PST) Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10032) with ESMTP id xyXnPobyD5XO; Fri, 21 Feb 2025 22:11:23 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id BFECB3C011BDB; Fri, 21 Feb 2025 22:11:23 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.cs.ucla.edu BFECB3C011BDB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.ucla.edu; s=9D0B346E-2AEB-11ED-9476-E14B719DCE6C; t=1740204683; bh=e1oWSJC0lldFTLVtjbEMQfNLWViJEEbqT9EIsgPpRhg=; h=Message-ID:Date:MIME-Version:To:From; b=PlJJSzS1iBL4XmaoqQkGS+/VtUICmE8laFZqef/YWS5tXNbEFMr32B++gk3wbbGye 5iVxds4piuHa+fmR0YFvTbQU6HhSvmprPfskxD09XSQFcD8FJrZWQpuvozsqcaNIQg 3Ws7DdqrVF/4KYiQqwCVrUpAXhe9xrdgHCuP1cm9frPeQici5lD5xNkfAe99fcRssl dS2t0iSrc0u3feZv97liHVP9JP8k13qUiz/UMa8xc8M9w+senBTGyUNiOSmdtW9VbC EBWtb9l+47+UuB5HHYK6ZlWwBFpL6aYi3VsBnnx9oo+j1vmjUd9TsD8LrPXfFgw6xh 3BpVDVfsG4b7A== X-Virus-Scanned: amavis at mail.cs.ucla.edu Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10026) with ESMTP id KfPN8P_6GZnI; Fri, 21 Feb 2025 22:11:23 -0800 (PST) Received: from [192.168.0.23] (75-166-225-192.hlrn.qwest.net [75.166.225.192]) by mail.cs.ucla.edu (Postfix) with ESMTPSA id 64CB53C011BD8; Fri, 21 Feb 2025 22:11:23 -0800 (PST) Content-Type: multipart/mixed; boundary="------------tf7XxNw2LCKKFhThYFPCHdMx" Message-ID: <27b53198-137f-4e37-8f99-b539e365d4ff@HIDDEN> Date: Fri, 21 Feb 2025 23:11:22 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [bug-diffutils] bug#76452: 3.11 critical bug: diff -Naur a b does not show a unified diff when one of the file is empty To: Collin Funk <collin.funk1@HIDDEN> References: <CWLP265MB4157FEE87F56A0B0234CDF2CBCC42@HIDDEN> <87v7t3rfob.fsf@HIDDEN> Content-Language: en-US From: Paul Eggert <eggert@HIDDEN> In-Reply-To: <87v7t3rfob.fsf@HIDDEN> X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 76452-done Cc: 76452-done <at> debbugs.gnu.org, Kate Deplaix <kit-ty-kate@HIDDEN> X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) This is a multi-part message in MIME format. --------------tf7XxNw2LCKKFhThYFPCHdMx Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Thanks for the diagnosis and the patch. 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Kate Deplaix <kit-ty-kate@HIDDEN>:Paul Eggert <eggert@HIDDEN>:Received: (at 76452) by debbugs.gnu.org; 22 Feb 2025 06:12:01 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Feb 22 01:12:01 2025 Received: from localhost ([127.0.0.1]:44487 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1tlik5-0007ab-4U for submit <at> debbugs.gnu.org; Sat, 22 Feb 2025 01:12:01 -0500 Received: from mail.cs.ucla.edu ([131.179.128.66]:33464) by debbugs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.84_2) (envelope-from <eggert@HIDDEN>) id 1tlik2-0007ZI-He for 76452 <at> debbugs.gnu.org; Sat, 22 Feb 2025 01:11:59 -0500 Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id E8CFB3C011BD8; Fri, 21 Feb 2025 22:11:52 -0800 (PST) Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10032) with ESMTP id h5iGaFttG4Wp; Fri, 21 Feb 2025 22:11:52 -0800 (PST) Received: from localhost (localhost [127.0.0.1]) by mail.cs.ucla.edu (Postfix) with ESMTP id AFDA13C011BDB; Fri, 21 Feb 2025 22:11:52 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.10.3 mail.cs.ucla.edu AFDA13C011BDB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cs.ucla.edu; s=9D0B346E-2AEB-11ED-9476-E14B719DCE6C; t=1740204712; bh=ii4p2/aW6iuWDc0wmArMG+UdOiVcBwYXijabdBxAnKs=; h=Message-ID:Date:MIME-Version:To:From; b=UJqJ3zercLDrhjEo0s16OAwtZr/QSEQQbfVANMwWvti8pi+WZat7yFhs4O/JYU6g7 AwIdgnX2GO92aAVRnv/GEWQuXAZ/QFWxZvi9zd4fbWyxb7IxyNOflwr49pobzPY9KG KBAU1QCSaGhbpJJXo4dfQ7zBTmm3bl8JoZ0hvE5lS5P0mNsVVEKpfjx1OGtAq4HjAr EuzGF+LPiR7BiBciCppdu1Bxk0M+TxY3+ZL1TEGvb+CgWoW3eJCdoh9EUF6NbW/iiC 4o7e5hOILOCA4eddPSMZS0rSSn3u2Jo2sCkvV49uUL47L3W9T4F+9cSSiwCxrwxPd0 9KMSSAxtSceDA== X-Virus-Scanned: amavis at mail.cs.ucla.edu Received: from mail.cs.ucla.edu ([127.0.0.1]) by localhost (mail.cs.ucla.edu [127.0.0.1]) (amavis, port 10026) with ESMTP id ycS0zNjYHAhU; Fri, 21 Feb 2025 22:11:52 -0800 (PST) Received: from [192.168.0.23] (75-166-225-192.hlrn.qwest.net [75.166.225.192]) by mail.cs.ucla.edu (Postfix) with ESMTPSA id 6721B3C011BD8; Fri, 21 Feb 2025 22:11:52 -0800 (PST) Message-ID: <cd44759b-07c8-4703-9dc6-5ece3c4c85de@HIDDEN> Date: Fri, 21 Feb 2025 23:11:51 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [bug-diffutils] bug#76452: bug#76452: 3.11 critical bug: diff -Naur a b does not show a unified diff when one of the file is empty To: Collin Funk <collin.funk1@HIDDEN>, Kate Deplaix <kit-ty-kate@HIDDEN> References: <CWLP265MB4157FEE87F56A0B0234CDF2CBCC42@HIDDEN> <87v7t3rfob.fsf@HIDDEN> <87msefrec3.fsf@HIDDEN> Content-Language: en-US From: Paul Eggert <eggert@HIDDEN> In-Reply-To: <87msefrec3.fsf@HIDDEN> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 76452 Cc: 76452 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) On 2/20/25 23:39, Collin Funk wrote: > Since it seems easy to overlook this in the future I have attached a > patch with the test case as well. Thanks, I installed that.
bug-diffutils@HIDDEN:bug#76452; Package diffutils.
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From: Collin Funk <collin.funk1@HIDDEN>
To: Kate Deplaix <kit-ty-kate@HIDDEN>
Subject: Re: [bug-diffutils] bug#76452: bug#76452: 3.11 critical bug: diff
-Naur a b does not show a unified diff when one of the file is empty
In-Reply-To: <87v7t3rfob.fsf@HIDDEN> (Collin Funk's message of "Thu, 20 Feb
2025 22:10:44 -0800")
References: <CWLP265MB4157FEE87F56A0B0234CDF2CBCC42@HIDDEN>
<87v7t3rfob.fsf@HIDDEN>
Date: Thu, 20 Feb 2025 22:39:40 -0800
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--=-=-=
Content-Type: text/plain
Collin Funk <collin.funk1@HIDDEN> writes:
> I have attached a patch to check for this condition.
Since it seems easy to overlook this in the future I have attached a
patch with the test case as well.
Collin
--=-=-=
Content-Type: text/x-patch
Content-Disposition: attachment;
filename=0001-diff-add-a-test-case-for-the-recent-empty-file-bug.patch
From 94fcd58f38beec6e591a86b67a57729951eaf108 Mon Sep 17 00:00:00 2001
From: Collin Funk <collin.funk1@HIDDEN>
Date: Thu, 20 Feb 2025 22:36:51 -0800
Subject: [PATCH] diff: add a test case for the recent empty file bug
* tests/empty-file: New file.
* tests/Makefile.am (TESTS): Add the test.
---
tests/Makefile.am | 1 +
tests/empty-file | 23 +++++++++++++++++++++++
2 files changed, 24 insertions(+)
create mode 100755 tests/empty-file
diff --git a/tests/Makefile.am b/tests/Makefile.am
index adbb10d..806cd3c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -9,6 +9,7 @@ TESTS = \
cmp \
colliding-file-names \
diff3 \
+ empty-file \
excess-slash \
expand-tabs \
help-version \
diff --git a/tests/empty-file b/tests/empty-file
new file mode 100755
index 0000000..842a099
--- /dev/null
+++ b/tests/empty-file
@@ -0,0 +1,23 @@
+#!/bin/sh
+# Test empty files
+
+. "${srcdir=.}/init.sh"; path_prepend_ ../src
+
+fail=0
+mkdir a b
+touch a/test
+echo 'content' > b/test
+
+returns_ 1 diff -Naur a b >out || fail=1
+cat <<EOF > expected || framework_failure_
+diff -Naur a/test b/test
+--- a/test
++++ b/test
+@@ -0,0 +1 @@
++content
+EOF
+# Remove date and time.
+sed -e 's/^\([-+*][-+*][-+*] [^ ]*\) .*/\1/' out > k; mv k out
+compare expected out || fail=1
+
+Exit $fail
--
2.48.1
--=-=-=--
bug-diffutils@HIDDEN:bug#76452; Package diffutils.
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From: Collin Funk <collin.funk1@HIDDEN>
To: Kate Deplaix <kit-ty-kate@HIDDEN>, Paul Eggert <eggert@HIDDEN>
Subject: Re: [bug-diffutils] bug#76452: 3.11 critical bug: diff -Naur a b
does not show a unified diff when one of the file is empty
In-Reply-To: <CWLP265MB4157FEE87F56A0B0234CDF2CBCC42@HIDDEN>
(Kate Deplaix's message of "Thu, 20 Feb 2025 15:25:05 +0000")
References: <CWLP265MB4157FEE87F56A0B0234CDF2CBCC42@HIDDEN>
Date: Thu, 20 Feb 2025 22:10:44 -0800
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--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
Hi Katie,
Kate Deplaix <kit-ty-kate@HIDDEN> writes:
> With diffutils 3.10, "diff -Naur a b" returns:
>
> diff -Naur a/test b/test
> --- a/test=E2=80=82=E2=80=82=E2=80=822025-02-20 14:50:07.870258052 +0000
> +++ b/test=E2=80=82=E2=80=82=E2=80=822025-02-20 14:50:18.957287641 +0000
> @@ -0,0 +1 @@
> +content
>
> but with diffutils 3.11, the same command returns:
>
> File a/test is a regular empty file while file b/test is a regular file
Good catch.
CC'ing Paul Eggert since I think that I found the cause and it appears
unintentional to me.
Commit e016d12581ac4ea6be1ded88279527ceface74e1 has the following
ChangeLog:
diff: improve symlink handling, avoiding a race
[...]
(compare_prepped_files): Use filetype and stat macros, not detype.
[...]
Where filetype refers to a constant string returned by Gnulib's
c_file_type function. The relevant lines are here:
if (S_ISREG (st->st_mode))
return st->st_size =3D=3D 0 ? N_("regular empty file") : N_("regular fi=
le");
So empty files will be treated as different file types because of that
change.
I have attached a patch to check for this condition.
Collin
--=-=-=
Content-Type: text/x-patch
Content-Disposition: attachment;
filename=0001-diff-don-t-treat-empty-files-as-a-different-file-typ.patch
From 7d4c55202ec4c0366062ff03d27a4883861ff222 Mon Sep 17 00:00:00 2001
From: Collin Funk <collin.funk1@HIDDEN>
Date: Thu, 20 Feb 2025 21:59:55 -0800
Subject: [PATCH] diff: don't treat empty files as a different file type
Reported by Kate Deplaix <kit-ty-kate@HIDDEN> in
<https://lists.gnu.org/r/bug-diffutils/2025-02/msg00005.html>.
* src/diff.c (compare_prepped_files): Check for two regular files where
one has a zero size and the other has a non-zero size.
---
src/diff.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/diff.c b/src/diff.c
index fa6100e..0c41fd2 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -1226,7 +1226,10 @@ compare_prepped_files (struct comparison const *parent,
if (toplevel
? (!S_ISLNK (cmp->file[0].stat.st_mode)
!= !S_ISLNK (cmp->file[1].stat.st_mode))
- : (cmp->file[0].filetype != cmp->file[1].filetype
+ : ((cmp->file[0].filetype != cmp->file[1].filetype
+ && !(S_ISREG (cmp->file[0].stat.st_mode)
+ && S_ISREG (cmp->file[1].stat.st_mode)
+ && (!!cmp->file[0].stat.st_size == !!!cmp->file[1].stat.st_size)))
|| ! (S_ISREG (cmp->file[0].stat.st_mode)
|| S_ISLNK (cmp->file[0].stat.st_mode)
|| S_ISCHR (cmp->file[0].stat.st_mode)
--
2.48.1
--=-=-=--
bug-diffutils@HIDDEN:bug#76452; Package diffutils.
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Kate Deplaix <kit-ty-kate@HIDDEN>:bug-diffutils@HIDDEN.
Full text available.bug-diffutils@HIDDEN:bug#76452; Package diffutils.
Full text available.
GNU bug tracking system
Copyright (C) 1999 Darren O. Benham,
1997 nCipher Corporation Ltd,
1994-97 Ian Jackson.