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Message-ID: <3F0D599F.6040300@t-online.de>
Date: Thu, 10 Jul 2003 14:18:39 +0200
From: =?ISO-8859-1?Q?Markus_Sch=F6nhaber?= <mks99 AT t-online DOT de>
Reply-To: cygwin AT cygwin DOT com
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To: cygwin AT cygwin DOT com
Subject: Re: cygwin-1.5.0-1: Problem stat-ing big file
References: <3F0D4D6A DOT 30601 AT t-online DOT de> <20030710113537 DOT GV12368 AT cygbert DOT vinschen DOT de> <20030710115455 DOT GW12368 AT cygbert DOT vinschen DOT de>
In-Reply-To: <20030710115455.GW12368@cygbert.vinschen.de>
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Corinna Vinschen wrote:

> On Thu, Jul 10, 2003 at 01:35:37PM +0200, Corinna Vinschen wrote:
> 
>>On Thu, Jul 10, 2003 at 01:26:34PM +0200, Markus Sch?nhaber wrote:
>>
>>>While trying if the new support for files larger than 2GB works, I 
>>>created a file with a size of 4.53 GB (4,869,120,000 Bytes) using a 
>>>simple write in python. No problems here. But when stat-ing the file 
>>>with python's os.stat or by calling stat from C as done in the little 
>>>program below, the size of the file gets reported as 574,152,704 Bytes.
>>
>>The changes to 64 bit file access are not propagated automatically to
>>existing applications.  E.g. the current `ls' from the fileutils
>>package is compiled with the old (small) stat structure which only
>>has 32 bit off_t for the file size.  If you want to actually use the
>>new struct stat and off_t with 64 bit, you have to recompile the
>>application.
>>
>>Sorry, but there's no way around that.
> 
> 
> ...and two more hints, just to clarify that a bit:
> 
> - You must compile using the header files and libcygwin.a which has been
>   released together with the DLL to get the correct results.  Mixing
>   old Cygwin headers with the new import lib or vice versa are sure
>   candidates for segmentation fauls.
> 
> - Since off_t is now 64 bit and the st_size member of struct stat is a
>   off_t, your printf isn't correct:
> 
>   printf("Size of file <%s>: %lld", argv[1], s.st_size);
>                              ^^^^
> 
>   %lld is necessary.  %ld matches 32 bit types on Cygwin.

Thanks again for clearing that up.

Regards
   mks



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