Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT sources DOT redhat DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT sources DOT redhat DOT com>
List-Help: <mailto:cygwin-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT sources DOT redhat DOT com
Delivered-To: mailing list cygwin AT sources DOT redhat DOT com
Message-ID: <3BC48153.3010505@likai.net>
Date: Wed, 10 Oct 2001 13:11:47 -0400
From: Li-Kai Liu <news AT likai DOT net>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:0.9.4) Gecko/20010913
X-Accept-Language: en-us
MIME-Version: 1.0
To: cygwin AT cygwin DOT com
Subject: Re: unbelievably filesize
References: <Pine DOT CYG DOT 4 DOT 30 DOT 0110101204220 DOT 1344-100000 AT dev9 DOT wohnfinder DOT de>
Content-Type: text/plain; charset=us-ascii; format=flowed
Content-Transfer-Encoding: 7bit

w DOT peppmeyer AT wohnfinder DOT de wrote:

>hi,
>
>at a win2k box ls and du are showing the following
>
>$ ls -l fileserver_voll.bkf
>-rw-r--r--    1 w.peppme Entwickl 18446744072396582912 Sep 20 14:14 fileserver_v
>oll.bkf
>$ du -b fileserver_voll.bkf
>2981998592      fileserver_voll.bkf
>
>the real filesize is 7.276.965.888 bytes and 5.983.522.816 bytes on disk
>with ntfs compression enabled. the file is mounted from another
>win2k box.
>
>have a nice day
>
obviously some sort of overflow ... i've determined how you get this 
number 18446744072396582912 ...

18446744072396582912 = 0xffffffff00000000 | (7276965888 & 0xffffffff )

it is probably the result of trying to sign extend a already overflowed 
32-bit integer. somewhere along the line, the file size is casted to a 
32-bit signed integer, and then recasted to a 64-bit signed integer. 
don't bother launching the debugger.

liulk



--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/