SVR4 vs BSD (was AIX (is it unix)?)

[Guy Harris]

>>Its general filesystem support is entirely different
>
>Of course, everyone will use the 4.2 file system unless unwilling to
>expend the time to convert.  Although the RFS internals differ from the
>vnode internals, the two are essentially the same

Uh, what is RFS here?  As of when I last had anything to do with S5R4,
AT&T's RFS was to be implemented in S5R4 basically as a file system type under
the S5R4 VFS mechanism.  By "RFS" are you referring here to some 4.4BSD
equivalent to VFS?  If so, whoever named it might want to consider
choosing a different name, to avoid confusion.

>(modulo SunOS's ridiculous insistence that the local file system be
>stateless).

To what are you referring here?

>>... Its network base is entirely different, although some of the
>>"r-commands" may have been adapted from BSD versions.
>
>Well, there is no accounting for taste.

Well, I don't know what "entirely different" means here.  The networking
code is based on streams and TLI, but:

	1) there should be a sockets interface to TCP and UDP, at least,
	   in S5R4;

	2) the TCP/UDP/IP implementation should at least be derived from
	   a 4.3-tahoe-vintage BSD implementation.

>Of course, the VM system is based upon a design done at
>Berkeley, and modified a bit at Sun.

Are you saying that the SunOS 4.0 VM design was done at Berkeley, and
just "modified a bit" at Sun?