Date: Fri, 28 Dec 2007 17:45:07 -0500 From: John Baldwin <jhb@freebsd.org> To: freebsd-arch@freebsd.org Subject: Re: kernel features MIB Message-ID: <200712281745.08144.jhb@freebsd.org> In-Reply-To: <200712271704.44796.jhb@FreeBSD.org> References: <200712271704.44796.jhb@FreeBSD.org>
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On Thursday 27 December 2007 05:04:44 pm John Baldwin wrote: > At work we don't have a pretty API for this at all, but I'm thinking for > FreeBSD we can do this: > > FEATURE(foo, "description of foo") > > which is a macro to create the 'kern.features.foo' node and set it to 1. Then > we could have a routine in libc: > > int feature_present(const char *name); > > That returns a boolean to indicate if a given feature is present or not by > invoking sysctlbyname(3), etc. > > Any objections to the idea? So here's a bikeshed question I have no idea for. Which header should feature_present()'s prototype go in? I anticipate this routine being used in libc itself, so I don't think it can go into libutil. -- John Baldwin
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