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Bug 1443125

Summary: gzip -l does not work for files >4GB
Product: Red Hat Enterprise Linux 7 Reporter: Ondrej <ondrej.valousek.xm>
Component: gzipAssignee: Petr Stodulka <pstodulk>
Status: CLOSED DUPLICATE QA Contact: qe-baseos-daemons
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 7.3CC: pstodulk
Target Milestone: rc   
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Hardware: Unspecified   
OS: Unspecified   
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Clone Of: Environment:
Last Closed: 2017-04-18 14:18:31 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Ondrej 2017-04-18 14:06:35 UTC 
Description of problem:

gzip -l shows nonsense for archives > 4GB. It showing negative compression ratio.
This is nowadays a big problem.
We should either say something like "Sorry, too big archive" or (better) fix this bug so that gzip -l works regardless of the file size.
Comment 2 Petr Stodulka 2017-04-18 14:18:31 UTC 
See manual:
-- 8< --
The gzip format represents the input size modulo 2^32, so  the  --list
option reports incorrect uncompressed sizes and compression ratios for
uncompressed files 4 GB and larger.  To work around this problem,  you
can  use the following command to discover a large uncompressed file's
true size:

     zcat file.gz | wc -c

The --list option reports sizes as -1 and crc as ffffffff if the  com‐
pressed file is on a non seekable media.
-- >8 --

This will never be fixed.

*** This bug has been marked as a duplicate of bug 752040 ***