Messages in this thread | | | Date | Thu, 13 Dec 2001 10:27:29 -0500 | Subject | Re: reiser4 (was Re: [PATCH] Revised extended attributes interface) | From | Andrew Pimlott <> |
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On Thu, Dec 13, 2001 at 12:23:46PM +0300, Hans Reiser wrote: > Andrew Pimlott wrote: > >First, I write a desktop application that wants to save an HTML file > >along with some other object that contains the name of the creating > >application. The latter can go anywhere you want, except in the > >same stream as the HTML file. The user has requested that the > >filename be /home/user/foo.html , and expects to be able to FTP this > >file to his ISP with a standard FTP program. What calls does my > >application make to store the HTML and the application name? If the > >answer is different depending on whether /home/user is NTFS or > >reiserfs4, explain both ways. > > > Are you sure that standard ftp will be able to handle extended > attributes without modification?
No, the ftp program only needs to transfer the HTML part.
> One approach is to create a plugin called ..archive that when read is a > virtual file consisting of an archive of everything in the directory.
Ok, does this mean that every directory in the filesystem (or in some part of it) will automatically have a node ..archive? Presumably, it will not appear in directory listings, but can be read but not written to? Does this mean that a legacy application (pathological as it may be) that expects to be able to create a file called ..archive will fail?
Or do you mean that the application would explicitly create the node associated with this plugin?
> It would be interesting I think to attach said plugin to standard > directories by default along with several other standard plugins like > ..cat, etc.
Anyway, you didn't answer the part I really care about. What calls does the application make to store the HTML and the "extended attribute"? You can pick whatever conventions you want, just give me an example.
> >Second, I booted NT and created a directory in the NTFS filesystem > >called /foo . In the directory, I created a file called bar. I > >also created a named stream called bar, and an extended attribute > >called bar. Now I boot Linux. What calls do I make to see each of > >the three objects called bar? > > > > You access /foo/bar, /foo/bar/,,bar, /foo/..bar by name.
How do I access the file called ..bar (created in NT) in the directory /foo?
(Anton, does NTFS define any reserved filename characters, or only win32?)
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