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Re: S_IFMT not mentioned in any man page
On Mon, Jan 11, 2016 at 09:41:42AM -0500, Mouse wrote:
> > Well you are not free to choose where and how the mode bits are
> > stored, they have to be in the single field st_mode or what and must
> > be diggable with a simple mask.
> Yes, but only at the API. Nothing says they have to be stored together
> on disk - indeed, nothing says they have to be stored at all, if they
> can be derived from something else. And, no matter what your
> S_FILETYPE() looks like, every filesystem implementation would have to
> conform to it, so you really wouldn't've gained much.
"The file type goes in the upper bits of st_mode" is somewhat untidy
but it's so deeply ingrained that there's no point worrying about it.
> > Well i'm all for freedom but that also means freedom of implementors,
> > here they have deal with a very hard and complicated task. Just
> > recall all that struct stat mess, with stat64 etc.
> What's stat64? I just did a search through /sys on my most recent
> NetBSD rev (5.2) and the only occurrences of "stat64" I found anywhere
> were in compat/.
It's a linuxism arising from their not understanding how to handle
David A. Holland
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