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Date: Tue, 1 Aug 2006 20:40:19 GMT
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To: freebsd-bugs@FreeBSD.org
From: Michael Scheidell <scheidell@secnap.net>
Cc: 
Subject: Re: bin/101123: gzip -l signed value error
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The following reply was made to PR bin/101123; it has been noted by GNATS.

From: Michael Scheidell <scheidell@secnap.net>
To: bug-followup@FreeBSD.org
Cc:  
Subject: Re: bin/101123: gzip -l signed value error
Date: Tue, 01 Aug 2006 16:39:17 -0400

 last entry: problem is twofold
 #1, freebsd base using old version of gzip (ports version is better)
 #2, design flaw in gzip won't record input file size > 0xffffffff
 
 Structure of zip header only allows 4 bytes for isize
 http://www.gzip.org/zlib/rfc-gzip.html
 
 ports version (gzip 1.3.5) attempts to correctly show size as
 
 ./gzip -l /var/livefs/var/ht-850-5.5.gz
          compressed        uncompressed  ratio uncompressed_name
           393954905          2690588672  85.4% /var/livefs/var/ht-850-5.5
 
 in order to be able to record the 80000000000LLU size of the input file, 
 I would need 5 bytes:
 12A05F2000.
 When gzip wrote the header, it dropped the 5th byte: 12, leaving A05F2000
 A05F2000 converted back to decimal is: 2690588672, so the ports version 
 of gzip is doing the best it can.
 Suggestion: can we upgrade the base gzip to 1.3.5 or 5.6 or 6.2? or add 
 a GZIP_OVERWRITE_BASE option to the ports version?
 Other than that, I see no way to fix gzip, but at least it can process a 
 4294967295 file in 1.3.5
 
 -- 
 Michael Scheidell, CTO
 SECNAP Network Security / www.secnap.com
 scheidell@secnap.net  / 1+561-999-5000, x 1131