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: Jason Mancini <jayrusman <at> hotmail.com>
Subject: bug#38766: closed (Re: bug#17804: RFC: fixing the 32-bit size and
 time limits in gzip file format)
Date: Thu, 16 Dec 2021 02:34:02 +0000

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Your bug report

#17804: bug: "gzip -l" truncates reported decompressed size to 32 bits

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 38766 <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: Jason Mancini <jayrusman <at> hotmail.com>
To: "bug-gzip <at> gnu.org" <bug-gzip <at> gnu.org>
Subject: bug: "gzip -l" truncates reported decompressed size to 32 bits
Date: Fri, 27 Dec 2019 20:35:13 +0000

As title states.

openSUSE Tumbleweed 20191216 (x86_64)
gzip 1.10

(Number delimiters manually added for clarity below.)

# zcat backup.bin.gz | wc -c
67,645,849,600
# gzip -l backup.bin.gz
compressed        uncompressed  ratio uncompressed_name
9,458,450,396    3,221,340,160 -193.6% backup.bin
#

67,645,849,600 => 0xf_c001_c000 => truncate => 0xc001_c000 => 3,221,340,160

Thanks!
Jason Mancini

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