[cvsnt-dev] Does anyone use 'Archive' bit on files any more?

Tony Hoyle tmh at nodomain.org
Sat Apr 24 12:46:32 BST 2004

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Mark Roddy wrote:
> There is actually an interface for reading/writing "extended attribute" data
> on files that is supported by both FAT32 and NTFS, although the win32 API is
> not present, so you would have to dive into the actual NT api (NtQueryEaFile
> and NtSetEaFile.) These apis allow you to have named attribute data
> associated with a file, which would be exactly what you want here. Of course
> using undocumented interfaces has issues.

That only works on NTFS...  FAT32 has only a single byte for storing attribute 
data so couldn't do anything like that.  Since NTFS has streams you don't gain 

I only need the extra bit temporarily, so it doesn't get lost in eg. diff 
operations...  persistently storing it on the client probably isn't worth the 
effort - NTFS actually has a permission called 'Execute file' buried in its 
ACL mechanism (cygwin reads it, for example) but the Win32 subsystem doesn't 
honour it.


Tony Hoyle <tmh at nodomain.org>  Key ID: 104D/4F4B6917 2003-09-13
Fingerprint: 063C AFB4 3026 F724 0AA2  02B8 E547 470E 4F4B 6917

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