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Subject: Re: unzip failure with files that contain colons
To: Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>, cygwin AT cygwin DOT com
References: <20220615183007 DOT 7xchz44wwbx2gnio AT lucy DOT dinwoodie DOT org>
 <ba73b31b-be25-fe58-98de-11d8cad679cd AT towo DOT net>
 <20220617002939 DOT 65c772fc3504f992b6fcf4d9 AT nifty DOT ne DOT jp>
From: Eliot Moss <moss AT cs DOT umass DOT edu>
Message-ID: <9093a683-0215-3835-42f5-a8f82975c29f@cs.umass.edu>
Date: Thu, 16 Jun 2022 11:50:23 -0400
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On 6/16/2022 11:29 AM, Takashi Yano wrote:
> On Thu, 16 Jun 2022 06:22:38 +0200
> Thomas Wolff wrote:
>> Am 15.06.2022 um 20:30 schrieb Adam Dinwoodie:
>>> Cygwin generally handles filenames with colons just fine, by mapping the
>>> character to some higher Unicode character and remapping on the fly.
>>> However Cygwin's `unzip` appears to have a bug: when unzipping an
>>> archive that contains a filename with a colon, it replaces the colon
>>> with an underscore.
>>>
>>> cygcheck.out and simple test script attached; expected behaviour from
>>> running `bash unzip-bug.sh` is that you get an empty file called `a:b`,
>>> but on Cygwin you instead get an empty file called `a_b`.
>> It's an explicit #ifdef __CYGWIN__ in upstream unzip, file unix/unix.c,
>> which transforms a bunch of characters.
>> If I uncomment most of them (except \), all unpack fine:
>> x0:z  x1<z  x2>z  x3|z  x4"z  x5?z  x6*z
> 
> I have taken over the maintenance of unzip package, and
> fix the problem in the updated unzip-6.0-18.
> https://cygwin.com/pipermail/cygwin/2022-June/251653.html

Is colon used for ADS under Windows?  Could that be why one should
be careful with it?

Regards - Eliot

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