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Date:	Wed, 17 Dec 2008 09:40:02 +0100
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: [ANNOUNCEMENT] [1.7] Updated: coreutils-7.0-1
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On Dec 16 21:18, Christian Franke wrote:
> Corinna Vinschen wrote:
>> 160 drwxrwx---+ 1 corinna vinschen       163840 Dec 16 10:13 bin
>>   0 drwxrwx---+ 1 corinna vinschen            0 Apr 15  2008 cygdrive
>>   0 drwxrwx---+ 1 corinna vinschen            0 Apr 30  2008 dev
>>  12 drwxrwx---+ 1 corinna vinschen        12288 Dec 15 11:15 etc
>>   4 drwxr-xr-x+ 1 corinna vinschen         4096 Jul  4 10:41 home
>>  40 drwxrwx---+ 1 corinna vinschen        40960 Dec  8 11:58 lib
>>   0 dr-xr-xr-x  8 corinna vinschen            0 Dec  1  2006 proc
>>   0 drwxrwx---+ 1 corinna vinschen            0 Apr 15  2008 sbin
>>   4 drwxrwxrwt+ 1 corinna vinschen         4096 Dec 15 16:35 tmp
>>   4 drwxrwx---+ 1 corinna vinschen         4096 Dec  8 11:54 usr
>>   0 drwxr-xr-x+ 1 SYSTEM  Administrators      0 May 21  2008 var
>>
>> The size of a directory which you just created is 0.  But big
>> directories (like /bin), or directories which once were big (like /tmp)
>> have a size which is a multiple of 4K.  This size is what's returned by
>> the NT function NtQueryInformationFile.  I assume that a directory is
>> created with one block in a pre-allocated area in the MFT or so, which
>> explains size 0.  When the dir grows, then normal FS blocks are added,
>> so the size grows beyond 0.  But actualyy I have no idea, so it could be
>> entirely different. :)
>
> On my XP SP2, st_size is always 0, even for large and fragmented 
> directories.

This is on 2K8.  You're right, on XP all dirs are 0.  Seems like this is
a new thing.

>> Interesting question.  NTFS and FAT filesystems are name-sorted by
>> default.  AFAIK directory changes on FAT are done in-memory, resorted,
>> and then written back as a whole block to disk.  
>
> XP does not sort a FAT directory.
>
> Does this probably depend on Windows version?

No, it's just not right what I wrote.  I don't know anymore where I
got that impression from that FAT gets always sorted.  Oh well.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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