[openbeos] Re: struct stat st_mode bits
- From: "François Revol" <revol@xxxxxxx>
- To: openbeos@xxxxxxxxxxxxx
- Date: Tue, 30 Nov 2004 17:36:09 +0100 CET
> "François Revol" <revol@xxxxxxx> wrote:
> > I was going through stat.h earlier, and I was wondering if anyone
> > had
> > any idea on what S_ALLOW_DUPS was supposed to be ?
> > doesn't seem to be used anywhere.
>
> BFS could use this internally, and although the original one doesn't,
> my implementation actually does. It's not really needed though, so we
> could think about removing it.
Doesn't tell me what it does...
>
> > Maybe we could use that bit for something useful, like Hurd's
> > S_INOCACHE.
> > (maybe a flag for open() would be more appropriate though.
>
> Not that it's yet supported, but let me quote from our fcntl.h:
> #define O_NOCACHE 0x00100000 /* doesn't use the file system
> cache if possible */
> #define O_DIRECT O_NOCACHE
>
> I don't think that a stat flag is really appropriate here, so I think
> we agree here :)
>
> > Also I'd reconsider using S_FOO_INDEX in favor of S_INDEX, since
> > it's
> > not very scalable... we have only 2 bits left in that field.
>
> I don't understand what you're trying to say here.
Are the different bits really needed or could we use just one to say
S_INDEX without type distinction ?
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