Quasijarus Project Status Report

Quasijarus Project Status Report

[Michael Sokolov]

Dear PUPS/TUHS members,

I have just finished SCCS-reconstructing /usr/src/sys. Amazingly (and to CSRG's
credit) the history has been preserved very well, and I have SCCS-recostructed
almost every file in the kernel. There are only a few lost SCCS files. For the
list see:

http://minnie.cs.adfa.edu.au/Quasijarus/sccs.html

If you know anything about these files, please contact me ASAP!

Also when I SCCS-reconstructed the /usr/src/sys/tahoe* subdirs, I had to take a
step back. In the currently shipping release, 4.3BSD-Quasijarus0, these subdirs
are identical to the ones on the 4.3BSD-Tahoe+HCX-9 tape. However, in the
current master source tree they have been stepped back to the original
4.3BSD-Tahoe tape. For the explanation of this decision, see:

http://minnie.cs.adfa.edu.au/Quasijarus/arch.html

Sincerely,
Michael Sokolov
Cellular phone: 216-217-2579
ARPA Internet SMTP mail: mxs46 at k2.scl.cwru.edu

Received: (from major at localhost)
	by minnie.cs.adfa.edu.au (8.9.1/8.9.1) id OAA22468
	for pups-liszt; Fri, 15 Jan 1999 14:50:07 +1100 (EST)
Received: from henry.cs.adfa.edu.au (henry.cs.adfa.oz.au [131.236.21.158])
	by minnie.cs.adfa.edu.au (8.9.1/8.9.1) with ESMTP id OAA22456
	for <pups at minnie.cs.adfa.oz.au>; Fri, 15 Jan 1999 14:49:58 +1100 (EST)
Received: (from wkt at localhost)
	by henry.cs.adfa.edu.au (8.9.1/8.9.1) id OAA21707
	for pups at minnie.cs.adfa.oz.au; Fri, 15 Jan 1999 14:51:04 +1100 (EST)
	(envelope-from wkt)
From: Warren Toomey <wkt@henry.cs.adfa.edu.au>
Message-Id: <199901150351.OAA21707 at henry.cs.adfa.edu.au>
Subject: Success in Compiling Nsys Kernel
To: pups at minnie.cs.adfa.oz.au (Unix Heritage Society)
Date: Fri, 15 Jan 1999 14:51:04 +1100 (EST)
Reply-To: wkt at cs.adfa.oz.au
X-Mailer: ELM [version 2.4ME+ PL43 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-pups at minnie.cs.adfa.edu.au
Precedence: bulk

All,
	After several days of frustration and enlightenment, I have been
able to compile and boot the `nsys' kernel source code on top of a 5th
Edition RK05 root filesystem.

The `nsys' kernel code corresponds to a time around the 3rd Edition of UNIX,
i.e. Jan 1973. Dennis Ritchie donated this to the PUPS Archive a few days ago.

I have placed the modifications to `nsys', plus some documentation, in the
PUPS Archive in Distributions/research/Dennis_v3.

Cheers all,
	Warren

Received: (from major at localhost)
	by minnie.cs.adfa.edu.au (8.9.1/8.9.1) id QAA22804
	for pups-liszt; Fri, 15 Jan 1999 16:19:14 +1100 (EST)
Received: from henry.cs.adfa.edu.au (henry.cs.adfa.oz.au [131.236.21.158])
	by minnie.cs.adfa.edu.au (8.9.1/8.9.1) with ESMTP id QAA22798
	for <pups at minnie.cs.adfa.oz.au>; Fri, 15 Jan 1999 16:19:07 +1100 (EST)
Received: (from wkt at localhost)
	by henry.cs.adfa.edu.au (8.9.1/8.9.1) id QAA22113
	for pups at minnie.cs.adfa.oz.au; Fri, 15 Jan 1999 16:20:12 +1100 (EST)
	(envelope-from wkt)
From: Warren Toomey <wkt@henry.cs.adfa.edu.au>
Message-Id: <199901150520.QAA22113 at henry.cs.adfa.edu.au>
Subject: Re: Success in Compiling Nsys Kernel
In-Reply-To: <01be4045$e3b28080$f2681081 at collinse-home.tyson.com> from Efton Collins at "Jan 14, 1999 11: 8:35 pm"
To: pups at minnie.cs.adfa.oz.au (Unix Heritage Society)
Date: Fri, 15 Jan 1999 16:20:12 +1100 (EST)
Reply-To: wkt at cs.adfa.oz.au
X-Mailer: ELM [version 2.4ME+ PL43 (25)]
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: owner-pups at minnie.cs.adfa.edu.au
Precedence: bulk

In article by Efton Collins:
> I wonder how long it has been since that version of the kernel ran? Could be
> 25 years. Surely that will now be the earliest bootable kernel bar none. It
> must give Ken and Dennis a smile.
> 
> It is nice to see such interesting things continue to find their way into
> the archive. With the help of so many of the pioneers PUPS is fulfilling its
> charter very well indeed.
> 
> E-

Hi Efton. I had been keeping Dennis informed of my progress, and a few
days ago he passed on some email from Bob Keys:

    [Dennis wrote:]
    Keys said (when I mentioned your tries)

     > Ohhh, neato!  Let us keep fingers crossed, knock on wood 3 times,
     > cow-tow as appropriate, rub the rabbit's foot, throw salt before
     > the sumo ring, .... and anything else?.....(:+}}....

Dennis then went on to suggest some debugging ideas, when I was stuck:

    Astonishing.  When booting it might be best to start
    with an init that just does
      open(something);
      open(something);
      write(1, "Hello\n", 6);

    It might even be appropriate to try first with just  abort();
    to see if /etc/init can be read,

He must be out today, because I haven't got a reply back from my email
indicating success.

The `nsys' files were dated Jan 22, 1973. I definitely wanted to get the
kernel working by Jan 22, 1999 so that it was only 25 years ago, not 26!

I've also made some notes about the differences between `nsys' and V5,
attached below. Thanks for your encouraging email.

Cheers,
	Warren

	Differences in available syscalls between `nsys' and V5.
	========================================================

Syscalls in `nsys' but not in V5:
---------------------------------

        1, &quit,                       /* 26 = quit */
        1, &intr,                       /* 27 = intr */
        1, &cemt,                       /* 29 = cemt */
        1, &ilgins,                     /* 33 = ilgins */
        1, &fpe,                        /* 40 = fpe */

                These deliver signals QUIT, INTR, EMT, INS or FPE
                to the pid in arg0. Any user can send these signals.

        0, &prproc                      /* 63 = special */

        For each of the 50 entries in the proc array, if there is
        a valid process entry there, print the array index and the
        following fields from the proc structure:

                p_stat, p_flag, p_pid, p_ppid,
                p_addr, p_size, p_wchan, p_textp

Syscalls in V5 but not in `nsys':
---------------------------------

        0, &getpid,                     /* 20 = getpid */
        1, &smdate,                     /* 30 = smdate */
        0, &nice,                       /* 34 = nice */
        0, &pipe,                       /* 42 = pipe */		!!!
        4, &profil,                     /* 44 = prof */

Other Differences
-----------------

        /* 21 = mount */ has 2 arguments in `nsys', 3 in V5
        /* 37 = kill */  has 0 arguments in `nsys', 1 in V5