bug#42965: closed (Wrong uncompressed size with option --list)

[GNU bug Tracking System]

Your message dated Wed, 15 Dec 2021 18:33:12 -0800
with message-id <b546014b-f19b-8025-cd7b-2266676b41d9@cs.ucla.edu>
and subject line Re: bug#17804: RFC: fixing the 32-bit size and time limits in 
gzip file format
has caused the debbugs.gnu.org bug report #17804,
regarding Wrong uncompressed size with option --list
to be marked as done.

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17804: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17804
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--- Begin Message --- Subject: Wrong uncompressed size with option --list Date: Fri, 21 Aug 2020 10:24:36 +0200 User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0

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.
--- End Message ---

> --- Begin Message ---
>
>
>
> 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
>
>
>
>
> User-agent: 
>
> Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.3.1
>
>
>
>
> 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.
>
>
> --- End Message ---