Re: kernel features MIB
- From: Robert Watson <rwatson@xxxxxxxxxxx>
- Date: Sat, 29 Dec 2007 00:31:04 +0000 (GMT)
On Fri, 28 Dec 2007, John Baldwin wrote:
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.
#include <sys/feature.h>
feature_check(2)?
Does POSIX talk about the namespace for non-portable names being passed to sysconf(3)?
Robert N M Watson
Computer Laboratory
University of Cambridge
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- From: John Baldwin
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