(Posted to both The Unix Heritage Society and the TZ mailing list)
I've been off-and-on reading the "live minus thirty years" old usenet
feed at olduse.net, and noticed something that may be of interest to
both of these groups: The original mod.sources posting of the (as far as
I can tell) earliest available version of Arthur David Olson's timezone
handling code, in 1986.
https://groups.google.com/d/msg/mod.sources/gcolqTxTt9w/04ZtaYCxLvcJ
For the files present in both, it matches revision 7441f6b6 from the git
repository, except for SCCS IDs vs %W%.
https://github.com/eggert/tz/tree/7441f6b6705782743f40b9fc40cdcc80a498fda5
The git repository contains a file ialloc.c that is not present in the
release.
Probable renamed files - These appear in the git repository under their
new
names, but had the older names in the release.
New: localtime.c newctime.3 zdump.c zic.8 zic.c
Old: tzcomp.8 tzcomp.c tzdump.c settz.c settz.3
Files in the release but not this version of the git repository:
mkdir.c strchr.c: These never appear, though they're referenced in
Makefile edits.
pacificnew: doesn't appear until SCCS version 8.1 in revision aaf2a927
dated July 2006.
years.sh: Appears as SCCS 7.1 yearistype.sh, dated March 1992.
According to Ken, the inspiration for ++ and -- came
from the PDP-7 hardware, not from previous languages.
The PDP-7 supported only ++i, where i had to be one
of only a few memory addresses. "For symmetry", Ken
says, he put all four operations in B. (And he did
not use the hardware autoincrement.)
Doug
All,
Is there a good source of information about the Unix v6 filesystem
outside of the source code itself? Also, is there a source for the
history of the early Unix filesystems from v6 onward?
Thanks,
Will
> From: Brantley Coile
> But B's ++ and -- operators seem to be unique.
B seems to be like UNIX itself in this regard: a carefully selected set of
old ideas, along with a few new ones of equal value.
Noel
>> https://www.bell-labs.com/usr/dmr/www/kbman.html
>> https://www.bell-labs.com/usr/dmr/www/bintro.html
> Yup, there certainly were different versions of B.
Yes, kbman covers only one of the two implementations that
cohabited the PDP-11. The other was the same language, with
software paging, so it could have a larger data space.
Various aspects of the language were borrowed from PL/I,
BCPL and Algol 68. ++ and -- were novel operators. The
reversal of Algol's assignment operators (e.g. -=
became =-) was eventually repealed in C.
doug
e
So the PDP-7 code from Norman has a B interpreter. I know the history:
BCPL -> B -> NB -> C, but I don't recall seeing a decent decription of
the B language. Does anybody know of such a document? We'll need something
like this so we can use the interpreter once we get it working :-)
Cheers, Warren
I grabbed a copy as well. A quick grep showed something I had forgotten:
I ran a Source redistribution service.
David
>
> On Tue, 2 Feb 2016, Warren Toomey wrote:
>
>> This is temporarily at http://www.tuhs.org/Usenet/Usenet.tar.bz2 if
>> anybody else would like to grab it.
>
> Suitably grabbed :-) I know, I must finish my mirror some day (got a few
> health issues right now)...
>
