[geeks] q: good source for leather book bag?

[Jonathan C. Patschke]

On Wed, 3 Jun 2009, gsm at mendelson.com wrote:

> According to the Wikipedia:

Which is never incorrect.

> You can interpet it as you want, to me it says that Darwin is an
> improved BSD kernel.

It's a mach kernel with BSD personality bits added.  It doesn't look
anything like BSD inside.  The source is available for you to read, should
you wish.

> The current crop of BSD's such as Open and Net trace their ancestry back
> to a hack to remove all of the AT&T code from the i386 implementation,
> and have no code in common with the UNIX it was built on.

Not strictly true.  The two files of AT&T license-restricted code was
removed, but remember that AT&T incorporated a lot of the BSD code.  This
is especially true in the userland and C runtime library.

> I actually met someone who had been part of the team to compare the AT&T
> source code line by line with the open source BSD to verify there was
> not one line of common code.

If that's the case, he proved the impossible.  There are plenty of lines
of common code between the two.  There are only so many ways to solve any
number of fundamental problems present inside the kernel and in libc.

-- 
Jonathan Patschke < "There is great satisfaction in building good tools
Elgin, TX          > for other people to use."
USA               <                                     --Freeman Dyson