delorie.com/archives/browse.cgi   search  
Mail Archives: cygwin/2024/10/24/09:57:25

DKIM-Filter: OpenDKIM Filter v2.11.0 delorie.com 49ODvPB04101824
Authentication-Results: delorie.com;
dkim=pass (1024-bit key, unprotected) header.d=cygwin.com header.i=@cygwin.com header.a=rsa-sha256 header.s=default header.b=GT9kTLGY
X-Recipient: archive-cygwin AT delorie DOT com
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4AE593858C5F
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cygwin.com;
s=default; t=1729778244;
bh=41N2VQOg4NfJijj1deFND1/6kmeAiC+76pMDw9jCEvM=;
h=Date:Subject:To:References:In-Reply-To:List-Id:List-Unsubscribe:
List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc:
From;
b=GT9kTLGYywB/32Re2D9nr4zqi8bmyq07Uh8S+RpNR50Zddy36se8F22DaEZAPnFcJ
MPY3CMk3mhZXXpb/ytPsx2EtYB2ypAB2vYHkI5y0zgeBtuPFx3/Q2pUJuG4kNPnUFu
29c6hrI3WssUYi0uEMEK8YWTHZer1QWRaQjhH7No=
X-Original-To: cygwin AT cygwin DOT com
Delivered-To: cygwin AT cygwin DOT com
DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 16C3C3858D21
ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 16C3C3858D21
ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1729778220; cv=none;
b=tcl0hUJlLBoG00avJFml6jdk1Fe2KoVex3jt6EBBRiHHLcmG0y5LnIGTdyomxB/TrQ84MGkhe/rY4UeCdnQzKA0Rn49x2Dgr7n3DgZZ+kukqLvvMNWHhNBRvwoCFLVmZjRLo53+cJfvkK6uZcCQy8C7+5dRFcvD03+H8V4HrjNU=
ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key;
t=1729778220; c=relaxed/simple;
bh=T5jdL7ZkOwxE2oIDuVEtkm4d50kKel13jRlW15UfJeI=;
h=Message-ID:Date:MIME-Version:Subject:To:From;
b=UkBp0wmc/GVaVS30gtEb6yY7rRO1UB5/J5hA6RnKx+lElQLZSW0z6UuBAm40UxDvZtAVbRTE8d4bTqvOpCX6hBocMB3VB50LAT0uH3RH+fRmF+Q/YgTWLa0u2YP7JTIKKJi+rJFY93Ea5durmgUjPHwl/W/l/oxoPQBhOrRDaQc=
ARC-Authentication-Results: i=1; server2.sourceware.org
Message-ID: <429b4a7c-4a05-467c-a90d-6ed6e87cfc63@SystematicSW.ab.ca>
Date: Thu, 24 Oct 2024 07:56:54 -0600
MIME-Version: 1.0
User-Agent: Mozilla Thunderbird
Subject: Re: Is this correct behaviour for 'rev'?
To: cygwin AT cygwin DOT com
References: <CAKwdsS9FGm9nqtZ+vSQ+WEWzRf-zUFAS06eo=ASwNB6ST3gddw AT mail DOT gmail DOT com>
<6fdbf92d-51f2-47ae-a482-5edd89ed3a89 AT maxrnd DOT com>
<f58d4a6c-476d-4cc5-bad5-28c99ad75c2b AT maxrnd DOT com>
<f6930a61-eed4-4a06-a813-6e0ea1914a13 AT towo DOT net>
Organization: Systematic Software
In-Reply-To: <f6930a61-eed4-4a06-a813-6e0ea1914a13@towo.net>
X-Rspamd-Queue-Id: F2B7420029
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS,
RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_PASS, SPF_PASS, TXREP,
UNPARSEABLE_RELAY autolearn=ham autolearn_force=no version=3.4.6
X-Rspamd-Server: rspamout07
X-Stat-Signature: wwzpj14u619iax8q9fegkomed4s7gycd
X-Session-Marker: 427269616E2E496E676C69734053797374656D6174696353572E61622E6361
X-Session-ID: U2FsdGVkX19SrhJHR2h/j0j7ITscUU5/3qNyVk3tS7M=
X-HE-Tag: 1729778200-601950
X-HE-Meta: U2FsdGVkX18T3vq05vrV0pmsWm+Kz0zmjQDIK+tkmOupYSJSMdPhS6Y00ee5EvC8FJNA4E0A6myaniq6L8/AiW5QPuGN0dzxkZ7ar92zxG18dPE2vImdJVL/InW6rJmCnk8Vc9PGK17iEu7Xdr4uhMNwcFvjDz4OzBgmUZwvCjLFBwc1D6b+x2vRHfoHbXeY3BRBJXw1LRtF2xX7royOp3DX+i0WP+JxeyTUiMqb3fYBwnzWn9/EMahbxMjtHlRLL2M/qDB52r6oWcZhyn97EFyOZjk0eVDAOlROxSwIq3zp8WEigSWQdzPWGlmTq353GQ8dzGnWKoIpgpU5dJ8rXGWNzYULDnMl
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
server2.sourceware.org
X-BeenThere: cygwin AT cygwin DOT com
X-Mailman-Version: 2.1.30
List-Id: General Cygwin discussions and problem reports <cygwin.cygwin.com>
List-Unsubscribe: <https://cygwin.com/mailman/options/cygwin>,
<mailto:cygwin-request AT cygwin DOT com?subject=unsubscribe>
List-Archive: <https://cygwin.com/pipermail/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-request AT cygwin DOT com?subject=help>
List-Subscribe: <https://cygwin.com/mailman/listinfo/cygwin>,
<mailto:cygwin-request AT cygwin DOT com?subject=subscribe>
From: Brian Inglis via Cygwin <cygwin AT cygwin DOT com>
Reply-To: cygwin AT cygwin DOT com
Cc: Brian Inglis <Brian DOT Inglis AT SystematicSW DOT ab DOT ca>
Errors-To: cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com
Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>
X-MIME-Autoconverted: from base64 to 8bit by delorie.com id 49ODvPB04101824

On 2024-10-24 02:37, Thomas Wolff via Cygwin wrote:
> 
> Am 24.10.2024 um 07:01 schrieb Mark Geisert via Cygwin:
>> Replying to myself, I continue...
>>
>> On 10/22/2024 10:33 PM, Mark Geisert via Cygwin wrote:
>>> On 10/22/2024 8:00 PM, Backwoods BC via Cygwin wrote:
>>>> It appears that 'rev' is choking on any character \x80 or higher, but
>>>> is OK with those \x1f or smaller. It doesn't give an error or ignore
>>>> it, it just stops.
>>>>
>>>> I don't have access to a Linux box so I can't see if this happens
>>>> there and nothing in the documentation suggests that this is the
>>>> correct functionality.
>>>>
>>>> Test case:
>>>> printf 'no non-ASCII characters\nhex 01 >\x01< here\nhex 80 >\x80<
>>>> here\nLine 4\n'|rev|rev
>>>>
>>>> This is for "rev from util-linux 2.33.1"
>>>>
>>>> I don't have the current version of 'rev' on my system due to not
>>>> having updated in a while. I accidentally screwed up my installation
>>>> and have been reluctant to wipe it and start over.
>>>>
>>>> So, is this the expected behaviour for the current version of 'rev'
>>>> under Cygwin and/or Linux?
>>>
>>> The current Cygwin util-linux 2.39.3-2 rev behaves in the same,
>>> broken way.  It looks like line-ending char(s) are not being handled
>>> correctly.   Don't know yet if it's rev itself or fgetws() being used
>>> by rev that's busted.  I'll investigate further.  Thanks for the report!
>>
>> This is a locale issue.  In the default Cygwin locale, rev mishandles
>> the \x80 byte and instead of stopping with an error message it enters
>> an infinite loop.  I'll probably report this upstream instead of
>> working out a local fix.
>>
>> There is a work-around: change to the "C" locale just to run rev.
>>     LC_ALL=C rev zzz
>> where zzz is a file containing your four lines.  You can also run your
>> original testcase with "rev" replaced by "LC_ALL=C rev" in both places.
> Sorry, this is not a good workaround as it corrupts all (proper)
> non-ASCII characters.
> You could do e.g.
> grep . | rev

Not quite, as that just matches non-empty lines, you would have to do something 
more like `grep -o . ...`, but not sure that would do what you want either.

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

-- 
Problem reports:      https://cygwin.com/problems.html
FAQ:                  https://cygwin.com/faq/
Documentation:        https://cygwin.com/docs.html
Unsubscribe info:     https://cygwin.com/ml/#unsubscribe-simple

- Raw text -


  webmaster     delorie software   privacy  
  Copyright © 2019   by DJ Delorie     Updated Jul 2019