Messages in this thread | | | Subject | Re: silent semantic changes with reiser4 | From | Christophe Saout <> | Date | Thu, 26 Aug 2004 23:09:07 +0200 |
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Am Donnerstag, den 26.08.2004, 14:00 -0700 schrieb Martin J. Bligh:
> > "It's a feature". > > > > The S_ISDIR/S_ISREG tests show real information: it shows not only user > > intent ("you should consider this a file, even if it has attributes"), but > > also whether it is a directory or a container. > > > > And there's a real technical difference there: the streams contained > > within a file are bound to that file. The files contained within a > > directory are _independent_ of that directory. Big difference. HUGE > > difference. > > > > So it's not confusing. If it tests as a file, you think of it as a file. > > It may have attributes aka named streams associated with it, and you may > > be able to open those attributes by treating the file as a directory, but > > that doesn't really change the fact that it's a file. > > > > The _big_ difference is that when you can make the compound object _look_ > > like a directory, that means that you can now manage the attributes with > > standard tools. They are still attributes, though. > > I think what you're saying is that they'd both return positive, right?
No. A file is still a file and S_ISREG will thus return false. The application should just try to open it as a directory if it wants to access the assiociated embedded attribute files. If the open fails, well, it knows that the filesystem (or Linux version, whatever) doesn't support this feature.
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