cvs commit: src/lib/libc/sys read.2

Ruslan Ermilov ru at FreeBSD.org
Wed Jun 16 17:47:43 UTC 2004


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 at 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}.
> 
But FreeBSD *is* the implementation, and in this implementation
IOV_MAX is the #define.  Does that make sense?


Cheers,
-- 
Ruslan Ermilov
ru at FreeBSD.org
FreeBSD committer
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