I was idly going through the 1999 Swartz memo
(http://www.groklaw.net/pdf/Swartz.pdf) wherein the source code of
RedHat 5.2 and UnixWare are compared for similarities. Most of those
are either bogus (just some #includes) or BSD-derived code. There is
one file which is concerning: drand48.c. The RedHat 5.2 file is very
similar to the UnixWare file, including headers and #ifdef's e.g.
/* @(#)drand48.c 2.2 */
/*LINTLIBRARY*/
/*
* drand48, etc. pseudo-random number generator
* This implementation assumes unsigned short integers of at least
* 16 bits, long integers of at least 32 bits, and ignores
* overflows on adding or multiplying two unsigned integers.
* Two's-complement representation is assumed in a few places.
* Some extra masking is done if unsigneds are exactly 16 bits
* or longs are exactly 32 bits, but so what?
* An assembly-language implementation would run significantly faster.
*/
#include <stdlib.h>
#ifndef HAVEFP
#define HAVEFP 1
#endif
As far as I can determine, drand48() arrived in SysVR1 and is defined
in the first SVID. It doesn't appear in SysIII, nor in the early BSDs.
Can anybody shed some light on drand48()? Could it have been written
elsewhere and made available e.g on a Usenix tape or comp.sources.*,
and included into SysV, or is SysV the origin of the code?
I'm sure the algorithm comes from elsewhere, e.g. Knuth, but the
strong code similarity is a worry.
Thanks,
Warren
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Hi,
has someone ever tried to grab the old BSD sources where TCP/IP showed up
first and tried to use them to implement TCP/IP support for an old SYSIII
UNIX (ZEUS comp.)?
I tried this but I got scared by so much things which would need to be
done, inter-process communication, pseudo terminal support are just the
"starting points" and at the end it is also the kinda old C compiler
which has problems with the BSD sources (#defs to long for the cpp for
example)...
Has someone experience with this kind of topic?
--
Oliver Lehmann
http://www.pofo.de/http://wishlist.ans-netz.de/
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All, I've spent a bit of time re-writing my "Unix Tree" website, where
you can browse the source code trees and compare related files. The
file comparison now uses colour to show similar lines.
The initial version is at http://minnie.tuhs.org/cgi-bin/utree.pl
but I will probably move the URL at some point.
Have a look and see what you think. I would gladly accept suggestions on
better or more accurate descriptions for each of the releases, also checking
of dates and other information.
Cheers,
Warren
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Do repositories of MNOS and DEMOS operating system source
code or binaries exist? Do either of these run on simh
or other simulators? (were the PDP11 and VAX11 knockoffs
close enough matches to the originals?)
Tim Newsham | www.thenewsh.com/~newsham | thenewsh.blogspot.com
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Cool just downloaded it.... seems whoever put it together really liked
gzip... ;)
On Sun, Mar 7, 2010 at 7:26 PM, Warren Toomey <wkt(a)tuhs.org> wrote:
> http://minnie.tuhs.org/Z/demos.tar.gz
>
> Let me know when you got it.
> Warren
>
Yeah, that'd be great! I've heard it's v6 with lots of bsd.. But it'd be cool to look at it!
-- Sent from my Palm Prē
On Mar 7, 2010 7:23 PM, Warren Toomey <wkt(a)tuhs.org> wrote:
On Sun, Mar 07, 2010 at 07:06:28PM -0500, Jason Stevens wrote:
> Seems to not include full source... I haven't gotten SIMH to boot the thing,
> nor some of the... "interesting" Russian PDP-11 emulators.. I ran strings
> through the disks, and I got some basic header files, oddly all in English,
> but no kernel or system source code, just some Fortran example....
> I'll have to ask someone in Russia if they have any real solid leads on
> DEMOS... It seems that once the Soviet Union fell, everyone abandoned DEMOS
> for any of the BSD's...
I can put up a tarball of the stuff I have for you, if you want.
Warren
I hate to say it but the demos stuff I found here
http://pdp-11.ru/mybk/pdp11/DEMOS.RAR
Seems to not include full source... I haven't gotten SIMH to boot the thing,
nor some of the... "interesting" Russian PDP-11 emulators.. I ran strings
through the disks, and I got some basic header files, oddly all in English,
but no kernel or system source code, just some Fortran example....
I'll have to ask someone in Russia if they have any real solid leads on
DEMOS... It seems that once the Soviet Union fell, everyone abandoned DEMOS
for any of the BSD's...
On Sun, Mar 7, 2010 at 5:00 PM, Warren Toomey <wkt(a)tuhs.org> wrote:
> On Sun, Mar 07, 2010 at 12:17:26PM -0500, Jason Stevens wrote:
> > I found some disk images online that say it's for the PDP-11 version...
> let
> > me see what I can pull from them for you.
> > The UWISC stuff is here:
> > http://minnie.tuhs.org/Archive/4BSD/Distributions/thirdparty/UWisc4.3/
>
> Thanks Jason!
> Warren
>
I found some disk images online that say it's for the PDP-11 version... let
me see what I can pull from them for you.
The UWISC stuff is here:
http://minnie.tuhs.org/Archive/4BSD/Distributions/thirdparty/UWisc4.3/
<http://minnie.tuhs.org/Archive/4BSD/Distributions/thirdparty/UWisc4.3/>
On Sun, Mar 7, 2010 at 8:47 AM, Warren Toomey <wkt(a)tuhs.org> wrote:
> On Sat, Mar 06, 2010 at 09:30:42PM -0500, Jason Stevens wrote:
> > I'd probably ask about that 4.3 Uwisc the wisconson one with the SUN NFS
> > stuff... and maybe the soviet DEMOS stuff...?
>
> Do you have the demos stuff? I have a pile of files, but it's all a jumble.
> If you have it, could you sit down a create a sensible tree of text-only
> files (i.e. no binary files) which I could add to the Unix Tree?
>
> I'll see if I have 4.3 Uwisc here too.
>
> Thanks,
> Warren
>
Hi, all!
Once, I was dismantling very old very long dead rusty box, which once
ran some version of SCO UNIX.
And I've got a strange device I've seen nowhere else - floppy-attached
tape drive, labelled Irwin, model 285. Drive looks
OK visually, motor wiring is perfect, so I can't see why it won't work.
I tried to make it run with old and new versions of Linux, but failed.
Do anybody have any documentation
regarding this?
Also - how wide these devices were used? I've never met one before
while I can't say I have little IT experience.
All the best,
S.
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I don't know where the Groklaw posting came from,
but the info is garbled in two ways:
1. It's not E_GREG, any more than it was ever E_NXIO
or E_IO or E_ACCES. It's EGREG.
2. The associated message is not and never was Greg
did it but It's all Greg's fault.
The Greg in question is indeed Greg Chesson; the saying
was part of the culture when I arrived in 1127 in 1984.
I knew the story once but have forgotten.
EGREG was put into the system initially half as a joke,
half as a spare error code for debugging kernel code.
Then, as I vaguely recall, Andrew Hume started using it
for real in his WORM-device driver, rather than inventing
a new code if he really needed it. This is how software
grows and why it must be pruned, or even razed to the
ground, now and then.
The phrase It's all so-and-so's fault, and variations
on that theme, appeared now and then in other ways in
the culture. My favourite was when Tom Duff augmented
the simple code (just a shell script, I think) that
sent printer-status warnings to the UNIX Room voice
synthesizer so that it didn't just say Please add paper,
it said Please add paper, dammit t d (if the current job
was td's). Except that for a while, for reasons that
now escape me, it was deliberatly changed to say dammit
andrew (Hume) no matter who's stuff was printing. It
took a week or two before Andrew noticed.
It was a kindergarten there, but a fun and productive one.
I don't miss living in northern New Jersey (which is why
I left the group in 1990) but I do miss the group as it
then was, and no longer is nor ever again shall be.
Norman Wilson
Toronto ON
(Actually typing this whilst sitting
somewhere northeast of Emeryville CA)
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