TUHS

tuhs@tuhs.org

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6557 discussions

MPM macros and code from 2002

by arnold＠skeeve.com

Hi All. A while back I found a copy of the MPM macros and code that I undoubtedly got from Brian Kernighan. Warren has put it in the archives: > Date: Mon, 17 Mar 2025 08:04:55 +1000 > From: Warren Toomey <wkt(a)tuhs.org> > To: Aharon Robbins <arnold(a)skeeve.com> > Cc: Warren Toomey <wkt(a)tuhs.org> > Subject: Re: MPM macros and code > > On Fri, Mar 07, 2025 at 03:11:47PM +0200, Aharon Robbins wrote: > > I have the following file: > > -rw-r--r-- 1 arnold arnold 100770 Feb 17 2002 mpm.shar > > Thanks Arnold, I've just put it here: > > https://www.tuhs.org/Archive/Applications/Typesetting/ > > Cheers! Warren Thanks Warren! Arnold

5 months, 1 week

Caldera release of awk, grep, and libregex from 2001

by arnold＠skeeve.com

Hi All. A while back I found the Caldera release of awk, grep and libregex from 2001. The tar file is dated 2012, but the actual code is from earlier. Warren has put it in the archive: > Date: Mon, 17 Mar 2025 08:07:12 +1000 > From: Warren Toomey <wkt(a)tuhs.org> > To: Aharon Robbins <arnold(a)skeeve.com> > Cc: Warren Toomey <wkt(a)tuhs.org> > Subject: Re: Caldera release of awk, grep, and libregex from 2001 > > On Mon, Feb 24, 2025 at 06:42:50PM +0200, Aharon Robbins wrote: > > I'm looking through my Downloads directory to try to clean it up > > a bit. I found this: > > > > $ ls -l osutils.tar.gz > > -rw-rw-r-- 1 arnold arnold 101072 Nov 25 2012 osutils.tar.gz > > Thanks for this as well, it's now at: > https://www.tuhs.org/Archive/Applications/Awk_Grep/ > > Cheers, Warren Thanks Warren! Arnold

5 months, 1 week

Question about compiled programs on a newer machine type be usable ?

by babydr DBA James W. Laferriere

Hello all , Here I am again , Maybe my ? might be relative to the community . I grabbed an archive of precompiled gnu software , During the extraction I got a 'warning' from a gzip'd tar & decided to dig into the underlying tarball to see if it was trully corrupted or repairable . Tada , I did a silly and less'd one of the binary files and noticed that the underlying file was 'ar'd by /usr/local/alphaev6-dec-osf5.1b/bin/ar , well all said and done My ol' as100 ain't a ev6 . So my Question , Could I use these programs that were created on a ev6 cpu system on my ev4 ? Tia , JimL -- +---------------------------------------------------------------------+ | James W. Laferriere | System Techniques | Give me VMS | | Network & System Engineer | 3237 Holden Road | Give me Linux | | jiml(a)system-techniques.com | Fairbanks, AK. 99709 | only on AXP | +---------------------------------------------------------------------+

5 months, 1 week

a bit of Plan9 history

by Jan Schaumann

Hi, This was seen on Dave Farber's IP list; with many of the Dramatis Personae on this list it seems worthwhile to share it here, too: "What I Saw at the Evolution of Plan 9" by Geoff Collyer https://adi.onl/oral.pdf -Jan

5 months, 1 week

When/how did ctime change from inode "creation" to "change" time?

by Theodore Ts'o

As part of a discusion on the Linux kernel mailing list, there was an assertion that ctime was orginally "creation time". From the v7 sources in TUHS, we can see: struct dinode { unsigned short di_mode; /* mode and type of file */ short di_nlink; /* number of links to file */ short di_uid; /* owner's user id */ short di_gid; /* owner's group id */ off_t di_size; /* number of bytes in file */ char di_addr[40]; /* disk block addresses */ time_t di_atime; /* time last accessed */ time_t di_mtime; /* time last modified */ time_t di_ctime; /* time created */ }; ... although the v7 kernel sources does seem to update ctime when the inode metadata changes, regardless of what the coment in /usr/src/sys/h/ino.h might say. More interestingly, this comment seems to continue in newer versions up to 3BSD, and then the comments becomes "change time" in BSD 4.2, probably coincident with the File System Implementation? The best we can guess is that the change from "creation time" to "inode change time" happened sometime between 1979 and 1982. Does anyone who was around can give the story about how and when this happened? - Ted

5 months, 2 weeks

Sad news: we lost George Colouris

by H.J.Thomassen

In July 1974 I visited Bell Labs Murray Hill, and Ken & Dennis showed me around. I was very impressed because we (Univ of Nijmegen, NL) had a PDP-11/45 just like theirs and I knew that machine quite well. It was clear that their software kicked the machine much heavier than our (DEC-original) DOS-system did. But I was a naive student so I wanted more information and asked Ken: are there many UNIX users in Europe? Ken brought us to the library where a Ms. Irma B. Biren, librarian, kept the record of licenses. We found prof. Colouris in London... When I asked whether maybe somebody closer by our place was present, Ken found Gideon Yuval in Tel Aviv. Nobody closer.... Hendrik-Jan Thomassen

5 months, 2 weeks

Re: What would early alternatives to C have been?

by Douglas McIlroy

> everyone should write for their first compiler in Pascal for a > simple language and no cheating using YACC. You need to write the whole > thing if you want to understand how parsing really works. Yacc certainly makes it easier to write parsers for big grammars, but it's far from cheating. You need to know a lot more about parsing to use Yacc than you need to roll your own. Hand parsing of a tiny grammar is almost a necessary step on the way to understanding Yacc. But I think hand-building the whole parser for a compiler is unnecessary torture--like doing trigonometry with log tables. Doug

5 months, 2 weeks

Sad news: we lost George Coulouris

by Arrigo Triulzi

Found out today that we lost George Coulouris about a month ago, he was at QMC (then QMW, now Queen Mary, University of London) in CompSci and an old Unix hand (but not only). Obituary from his PhD student (who wrote a Unix editor called “ded”): https://www.theguardian.com/education/2025/jan/19/george-coulouris-obituary

5 months, 2 weeks

"Webster's Second on the Head of a Pin"?

by Royce Williams

Someone I know is seeking the original version of an internal Bell Labs memo from 1974 titled "Webster's Second on the Head of a Pin" by Morris and Thompson. The topic appears to be related to improving the speed of lookups or search. It's cited in a few papers as "Unpublished Technical Memo, Bell Laboratories, Murray Hill, NJ 1974." All I can find online is citations. Any leads appreciated! -- Royce

5 months, 2 weeks

What would early alternatives to C have been?

by Dan Cross

As I mentioned in the discussion about C, it's easy to look back with a modern perspective and cast aspersions on C. But this got me thinking, what would possible alternatives have been? In the context of the very late 1960s heading into the early 70s, and given the constraints of the PDP-7 and early PDP-11s, what languages would one consider for implementing a system like early Unix? Dennis's history paper mentioned a very short-lived effort at Fortran, and I asked about that a few years ago, but no one really remembered much about it; I gather this was an experiment that lasted a few days or weeks and was quickly abandoned. But what else? My short list included PL/1, Algol/W, Fortran, and Pascal. Fortran was already mentioned. I don't think PL/1 (or PL/I) could have fit on those machines. Pascal was really targeted towards teaching and would have required pretty extensive work to be usable. The big question mark in my mind is Algol/W; how well known was it at the time? Was any consideration for it made? Obviously, the decision to go with BCPL (as the basis for B, which beget C) was made and the rest is history. But I'm really curious about how, in the research culture at the time, information about new programming languages made its way through the community. - Dan C.

5 months, 2 weeks

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