[DUG] determining file system

[Phil Middlemiss]

Thanks Matt - at this stage I would be happy to be able to just identify 
that the file is being served up by a netware server or similar. If we 
can identify that situation then we can just ignore the datetime value 
which will do for now.

Cheers,
Phil.

Matt Comb wrote:

> Hi Phil.
>
> I spent ages some years back trying to sort out something very similar.
>
> I can't entirely remember the details, but Fat, Fat32 and NTFS store 
> datetime information differently from each other.(Others may know the 
> exact details). Primarily I believe the difference between these 
> windows formats is whether or not the locale / regional settings are 
> applied. From memory NTFS stores according to GMT while FAT systems 
> store according to regional settings. For example, try looking at a 
> files creation date and time, and then turn on daylight savings 
> settings and watch the date and time change, so frustrating if you are 
> trying to synchronise files as we were. Windows automatically alters 
> the date/time and all of a sudden your date time is out.
>
> There is a call to tell you the operating system of a volume, but 
> there are some difficulties, for exmaple:
>
> Machine 1 (FAT) accessing file on Machine 1 (FAT)
> Machine 1 (FAT) accessing file on Machine 2 (NTFS)
> Machine 2 (NTFS) accessing file on Machine 2 (NTFS)
>
> could all produce different values.
>
> If you want I can dig out some code for you that is supposed to strip 
> off the locale information on those FAT volumes but the problem is 
> when you access from Machine 1 to Machine 2, you don't know what 
> locale information is being applied on the second machine. So you can 
> never really cover all bases.
>
> Depending on what you are attempting to do if you have control of all 
> the files that go in there in the first place, you may want to 
> consider embedding datetime information into the filename or some 
> index database alongside it.
>
> Other people might have some better solutions.
>
> Matt.
>
>
>
> ----- Original Message ----- From: "Phil Middlemiss" <phil at tumonz.co.nz>
> To: "NZ Borland Developers Group - Delphi List" <delphi at ns3.123.co.nz>
> Sent: Wednesday, July 20, 2005 2:26 PM
> Subject: Re: [DUG] determining file system
>
>
>> Hmmm, not quite what I need. I'll keep looking. Cheers,
>> Phil.
>>
>> Rohit Gupta wrote:
>>
>>> I seem to recall some api that would give you this info.  However, 
>>> the nearest I can find is GetVolumeInformation.  I know there is 
>>> something else, but I cant find it.  :-)
>>>
>>> Date sent:      Wed, 20 Jul 2005 11:08:14 +1200
>>> From:           Phil Middlemiss <phil at tumonz.co.nz>
>>> Organization:   MTS Ltd
>>> To:             NZ Borland Developers Group - Delphi List 
>>> <delphi at ns3.123.co.nz>
>>> Subject:        [DUG] determining file system
>>> Send reply to:  NZ Borland Developers Group - Delphi List 
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>>> Part of our code depends on getting the file stamp of a particular 
>>> file, however on systems that have that particular file served by 
>>> something like Novell Netware, that timestamp can be something other 
>>> than what was expected.
>>>
>>> Is there a way to determine the file/operating/network system 
>>> (whatever is the correct one to check) of a given location?
>>>
>>> Cheers,
>>> Phil.
>>> _______________________________________________
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>>>
>>> Rohit
>>>
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