Date: Wed, 16 Jun 2004 11:43:34 -0400 (EDT) From: Garrett Wollman <wollman@khavrinen.lcs.mit.edu> To: Ruslan Ermilov <ru@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/lib/libc/sys read.2 Message-ID: <200406161543.i5GFhYq7009877@khavrinen.lcs.mit.edu> In-Reply-To: <20040616062409.GC20866@ip.net.ua> References: <200406150124.i5F1Ofp9084012@repoman.freebsd.org> <200406151522.i5FFMeIc001885@khavrinen.lcs.mit.edu> <20040616062409.GC20866@ip.net.ua>
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<<On Wed, 16 Jun 2004 09:24:09 +0300, Ruslan Ermilov <ru@FreeBSD.org> said:
>> [I wrote:]
>> Actually, it's {IOV_MAX}.
> You mean you want it marked up like in POSIX, with curlies?
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:
- 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.
I have argued for a long time that such system parameters are due
special markup. POSIX writes it {IOV_MAX}.
-GAWollman
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