FreeLists / openbeos / [openbeos] Re: struct stat st_mode bits

["François Revol" <revol@xxxxxxx>]

> "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 ?