Date: Wed, 16 Jun 2004 20:47:37 +0300 From: Ruslan Ermilov <ru@FreeBSD.org> To: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> Cc: doc@FreeBSD.org Subject: Re: cvs commit: src/lib/libc/sys read.2 Message-ID: <20040616174737.GA25398@ip.net.ua> In-Reply-To: <200406161543.i5GFhYq7009877@khavrinen.lcs.mit.edu> References: <200406150124.i5F1Ofp9084012@repoman.freebsd.org> <200406151522.i5FFMeIc001885@khavrinen.lcs.mit.edu> <20040616062409.GC20866@ip.net.ua> <200406161543.i5GFhYq7009877@khavrinen.lcs.mit.edu>
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On Wed, Jun 16, 2004 at 11:43:34AM -0400, Garrett Wollman wrote:
> <<On Wed, 16 Jun 2004 09:24:09 +0300, Ruslan Ermilov <ru@FreeBSD.org> sai=
d:
>=20
> >> [I wrote:]
> >> Actually, it's {IOV_MAX}.
>=20
> > You mean you want it marked up like in POSIX, with curlies?
>=20
> I don't care that much about how it is marked up. The important point
> is that it is a configuration variable, not a constant. POSIX makes
> no guarantee:
>=20
> - that IOV_MAX will be defined as a preprocessor macro,
> - that sysconf(_SC_IOV_MAX) is time-invariant, or
> - that implementations will have any maximum at all.
>=20
> I have argued for a long time that such system parameters are due
> special markup. POSIX writes it {IOV_MAX}.
>=20
But FreeBSD *is* the implementation, and in this implementation
IOV_MAX is the #define. Does that make sense?
Cheers,
--=20
Ruslan Ermilov
ru@FreeBSD.org
FreeBSD committer
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