TUHS

tuhs@tuhs.org

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6534 discussions

the guy who brought up SVr4 on Sun machines

by Berny Goodheart

I have been trolling these many threads lately of interest. So thought I should chip in. "SVr4 was not based on SunOS, although it incorporated many of the best features of SunOS 4.x”. IMHO this statement is almost true (there were many great features from BSD too!). SunOS 5.0 was ported from SVR4 in early 1991 and released as Solaris 2.0 in 1992 for desktop only. Back in the late 80s, Sun and AT&T partnered development efforts so it’s no surprise that SunOS morphed into SVR4. Indeed it was Sun and AT&T who were the founding members of Unix International…with an aim to provide direction and unification of SVR4. I remember when I went to work for Sun (much later in 2003), and found that the code base was remarkably similar to the SVR4 code (if not exact in many areas). Here’s the breakdown of SVR4 kernel lineage as I recall it. I am pretty sure this is correct. But I am sure many of you will put me right if I am wrong ;) From BSD: TCP/IP C Shell Sockets Process groups and job Control Some signals FFS in UFS guise Multi groups/file ownership Some system calls COFF From SunOS: vnodes VFS VM mmap LWP and kernel threads /proc Dynamic linking extensions NFS RPC XDR From SVR3: .so libs revamped signals and trampoline code VFSSW RFS STREAMS and TLI IPC (Shared memory, Message queues, semaphores) Additional features in SVR4 from USL: new boot process. ksh real time extensions Service access facility Enhancements to STREAMS ELF

8 years, 5 months

Re: [TUHS] the guy who brought up SVr4 on Sun machines

by jnc＠mercury.lcs.mit.edu

> I wonder if >pdd ... was in any way any inspiration for /proc? That may have been a bit too cryptic. "pdd" ('process directory directory') was a top-level directory in the Multics filesystem which contained a directory for each process active in the system; each directory contained data (in segments - roughly, 'files', but Multics didn't have files because it was a single-level store system) associated with the process, such as its kernel- and user-mode (effectively - technically, ring-0 and ring-4) stacks, etc. So if a process was sitting in a system call, you could go into the right directory in >pdd and look at its kernel stack and see the sequence of procedure calls (with arguments) that had led it to the point where it blocked. Etc, etc. Noel

8 years, 6 months

Re: [TUHS] Rje / sna networking

by Rudi Blom

>Date: Wed, 11 Jan 2017 02:16:26 +0000 >From: Steve Simon <steve(a)quintile.net> >To: tuhs(a)tuhs.org >Subject: [TUHS] Rje / sna networking >Message-ID: <05DECAED-065A-4520-805A-D86CF1596A01(a)quintile.net> >Content-Type: text/plain; charset=us-ascii >Casual interest, >Anyone ever used RJE from SYS-III - IBM mainframe remote job entry >System? I started on Edition 7 on an interdata so I am (pretty much) too young >for that era, unless I am fooling myself. >-Steve In the 90sh DEC in Europe had a number of products on top of SCO UNIX 3.2V4.2 calling DECadvantage (from the German part of former Philips Information Systems). Included were an SNA environment with 3270 display/print, 3770/RJE, and APPC. I've used RJE for downloading daily reports in one of the banks here in Thailand. Long time ago though. Still have various sample scripts I put together that time.

8 years, 6 months

/proc aka the guy who brought up SVr4 on Sun machines

by Doug McIlroy

> /proc came from research Indeed it did. > /proc was done by Roger at AT&T (maybe USL). I recall him telling me that > he was not the original author though and that it came from PWB. Roger Faulkner's /proc article, recently cited in tuhs, begins with acknowledgment to Tom Killian, who originated /proc in research. (That was Tom's spectacular debut when he switched from high-energy physics, at Argonne IIRC, to CS at Bell Labs.) doug

8 years, 6 months

BSD job control, aka the guy, etc

by Lars Brinkhoff

I asked: > I wonder where the inspiration for the Unix job control came from? In > particular, I can't help but notice that Control-Z does something very > similar in the PDP-10 Incompatible Timesharing System. Jim Kulp answered: > The ITS capabilities were certainly part of the inspiration. It was a > combination of frustrations and gaps in UNIX with some of those > features found in ITS that resulted in the final package of features.

8 years, 6 months

Rje / sna networking

by Steve Simon

Casual interest, Anyone ever used RJE from SYS-III - IBM mainframe remote job entry System? I started on Edition 7 on an interdata so I am (pretty much) too young for that era, unless I am fooling myself. -Steve

8 years, 6 months

Re: [TUHS] Unix stories, Stephen Bourne and IF-FI in C code

by Norman Wilson

Doug McIlroy: There was some pushback which resulted in the strange compromise of if-fi, case-esac, do-done. Alas, the details have slipped from memory. Help, scj? ==== do-od would have required renaming the long-tenured od(1). I remember a tale--possibly chat in the UNIX Room at one point in the latter 1980s--that Steve tried and tried and tried to convince Ken to rename od, in the name of symmetry and elegance. Ken simply said no, as many times as it took. I don't remember who I heard this from; anyone still in touch with Ken who can ask him? Norman Wilson Toronto ON

8 years, 6 months

NFS aka the guy who brought up SVr4 on Sun machines

by Doug McIlroy

Reputed origins of SVR4: > From SunOS: > ... > NFS And, sadly, NFS is still with us, having somehow upstaged Peter Weinberger's RFS (R for remote) that appeared at the same time. NFS allows one to add computers to a file system, but not to combine the file systems of multiple computers, as RFS did by mapping uids: NFS:RFS::LAN:WAN. Doug

8 years, 6 months

Re: [TUHS] the guy who brought up SVr4 on Sun machines

by jnc＠mercury.lcs.mit.edu

> From: Chet Ramey > /proc was done by Roger at AT&T (maybe USL). I recall him telling me > that he was not the original author though and that it came from PWB. > The original implementation was done by Tom Killian for 8th Edition. I wonder if >pdd (which dates to somewhere in the mid-60's, I'm too lazy to look the exact date up) was in any way any inspiration for /proc? Noel

8 years, 6 months

Ksh and SVR4

by pechter＠gmail.com

Wasn't ksh SVR4... It was in the Xelos sources @Concurrent Computer which was an SVR2 port. Xelos didn't do paging but the source in 87 or 88 or so had ksh in it. I. built it for SVR4 on my Xelos 3230 back in the day. Bill Sent from my android device.

8 years, 6 months

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