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Message-ID: <43168264-5f0a-45d6-ac27-dfbaae1b60cd@maxrnd.com>
Date: Sun, 6 Apr 2025 00:53:56 -0700
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Subject: Re: cygutils 1.4.17-2: lssparse -H does not print hole at offset 0 if
 more data exists
To: cygwin AT cygwin DOT com
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From: Mark Geisert via Cygwin <cygwin AT cygwin DOT com>
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Hi Roland,

On 4/5/2025 7:56 AM, Roland Mainz via Cygwin wrote:
> On Wed, Apr 2, 2025 at 4:01 PM Christian Franke via Cygwin
> <cygwin AT cygwin DOT com> wrote:
>>
>> Testcase for a minor issue:
>>
>> $ > sparse_file
>>
>> $ chattr +S sparse_file
>>
>> $ dd if=/dev/zero bs=1M count=1 conv=sparse,notrunc of=sparse_file
>> ...
>> $ lssparse sparse_file # OK
>>
>> $ lssparse -H sparse_file # OK
>> Hole range[0]: offset=0x0,      length=0x100000
>>
>> $ printf X >> sparse_file
>>
>> $ lssparse sparse_file # OK
>> Data range[1]: offset=0x100000, length=0x1
>>
>> $ lssparse -H sparse_file # Missing 'Hole range[0]'
>> Data range[1]: offset=0x100000, length=0x1
>>
>> The condition at lssparse.c:161 is never true:
>>
>>      141      for (i=1 ;;) {
>>      ...
>>      161          if (print_holes && (i == 0) && (data_start > 0)) {
>>
>> Possible patch attached. Important: Not tested with other corner cases.
> 
> 1. *Thanks* ... :-)
> 
> 2. New version is available from
> http://svn.nrubsig.org/svn/people/gisburn/code/sparsefiles/lssparse.c

This new version has been added to an updated cygutils 1.4.17-3 release 
as announced in
https://cygwin.com/pipermail/cygwin-announce/2025-April/012256.html
Thanks & Regards,

..mark

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