GNU bug report logs - #17804
RFC: fixing the 32-bit size and time limits in gzip file format

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Juan Diaz <j.a.diazh <at> hotmail.com>
Subject: bug#42965: closed (Re: bug#17804: RFC: fixing the 32-bit size and
 time limits in gzip file format)
Date: Thu, 16 Dec 2021 02:34:03 +0000

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Your bug report

#17804: Wrong uncompressed size with option --list

which was filed against the gzip package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 42965 <at> debbugs.gnu.org.

-- 
17804: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17804
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Petr Stodůlka <pstodulk <at> redhat.com>
Cc: 17804-done <at> debbugs.gnu.org
Subject: Re: bug#17804: RFC: fixing the 32-bit size and time limits in gzip
 file format
Date: Wed, 15 Dec 2021 18:33:12 -0800

On 6/18/14 15:12, Paul Eggert wrote:
> One simple way forward would be to implement what pigz -tl does, namely, 
> decompress the input stream and discard the output, but print its size.

I finally got around to implementing that suggestion:

https://git.savannah.gnu.org/cgit/gzip.git/commit/?id=cf26200380585019e927fe3cf5c0ecb7c8b3ef14
https://git.savannah.gnu.org/cgit/gzip.git/commit/?id=32fef43b442c7abc70414863d64718cd06f6477a

So I am closing this old bug report.

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From: Juan Diaz <j.a.diazh <at> hotmail.com>
To: bug-gzip <at> gnu.org
Subject: Wrong uncompressed size with option --list
Date: Fri, 21 Aug 2020 10:24:36 +0200

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Hi,

I've seen that with large sized files (14G in this case) when I use the 
"list" option I get wrong uncompressed size and the ratio, of course, is 
wrong. I've tested it with versions 1.10 (last just compiled) and 1.5 
(system version).

/ # ./gzip -l  file.gz //
//         compressed        uncompressed  ratio uncompressed_name//
/

/         4937209128          1654354046 -198.4% file/

The real uncompressed size is 14539255934.

/# ./gzip -V//
//gzip 1.10//
//Copyright (C) 2018 Free Software Foundation, Inc.//
//Copyright (C) 1993 Jean-loup Gailly.//
//This is free software.  You may redistribute copies of it under the 
terms of//
//the GNU General Public License <https://www.gnu.org/licenses/gpl.html>.//
//There is NO WARRANTY, to the extent permitted by law.//
//
//Written by Jean-loup Gailly./


/#ldd ./gzip //
//        linux-vdso.so.1 =>  (0x00007ffecc9f2000)//
//        libc.so.6 => /lib64/libc.so.6 (0x00007f4414ef0000)//
//        /lib64/ld-linux-x86-64.so.2 (0x00007f44152be000)/


/# file ./gzip //
//./gzip: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), 
dynamically linked (uses shared libs), for GNU/Linux 2.6.32, 
BuildID[sha1]=d0d1507ea734a12479a63489ea858bd997fcb716, not stripped/

Regards.

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