max at love2party.net
Mon Nov 12 23:44:50 PST 2007
First off - freebsd-arch@ is not the right mailing list to ask these kind
of basic questions. Plus, I'm hoping this is not a course work for you
On Tuesday 13 November 2007, Albert Meyburgh wrote:
> I read that freebsd is monolithic. Is that still true?
Yes in that it is not based on a "micro kernel" and that the kernel and
all it's services and drivers are running in one address space.
> If I wanted to add functionality like device drivers, or maybe my own
> tcp/ip stack, (or maybe add the facility to allow modules) do I have
> to download the entire source and add it in there?
That depends on the type of thing you want to do. FreeBSD offers a lot of
entry points to hook in your code as needed. Device drivers can
absolutely be standalone modules (there are a few in the ports tree (e.g.
the nvidia one)). Your own TCP/IP stack is more tricky, but you could
use the netgraph(3) framework to hook that at runtime, too.
> nothing available like a kernel module in linux? (which afaik you can
> attach at runtime)
Yes, kernel modules are available and can be attached at runtime
(depending on what they are doing). This doesn't make the kernel
> also when I add packages using the ports system, then remove them, are
> they completely gone or are there still random conf files / misc..
> laying around slowly bloating the hdd
We try to make sure this does not happen. During the package build the
buildcluster checks for files that are not accounted for and issues a
warning to the maintainer. The strict rule of putting all 3rd party
programs under either /usr/local or /compat also helps to keep the mess
to a minimum.
> also is there a way to scan for unused packages somehow and list them
There is a tool called pkg_cutleaves in the ports tree that will show you
all ports that are not used by any other ports and lets you decide if you
want to keep them or not. There might be other solutions, too.
/"\ Best regards, | mlaier at freebsd.org
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