Re: place some extra information on a file

From:

Norbert Unterberg <nunterberg@newsgroups.nospam>

Newsgroups:

microsoft.public.vc.language

Date:

Wed, 05 Mar 2008 13:22:57 +0100

Message-ID:

<eD0UmurfIHA.5280@TK2MSFTNGP02.phx.gbl>

byaarov@yahoo.com schrieb:

On Mar 4, 1:39 pm, Norbert Unterberg <nunterb...@newsgroups.nospam>
wrote:

byaa...@yahoo.com schrieb:

I am trying to find the best way to place a small (128 bytes) of
information on a file. I dont want to modify the data in the file and
would like to not use any extra space with in the data stream of the
file itself.
Which would be the best way to do this... I am considering the
following ones
1. reparse points
2. extra attribute
3. setting the short name to be that of my special string

4. File Streams?http://msdn2.microsoft.com/en-us/library/aa364404.aspx

Norbert

Thanks. Played with file streams and it seems like the best option.
Where is NT storing this data?

You could also ask where does NTFS stores files? NTFS files are made of
multiple streams, and the "normal" file contents is just the default
stream. The other streams are stored together with the normal file on
the drive. You could think of them as extended file attributes of
arbitrary size.

However, you need to know that the other file streams are lost when you
copy the file to a file system that does not support streams (like FAT32).