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From: <ron@ronnatalie.com>
To: "'Richard Salz'" <rich.salz@gmail.com>, "'Clem Cole'" <clemc@ccc.com>
Cc: 'The Eunuchs Hysterical Society' <tuhs@tuhs.org>
Subject: Re: [TUHS] PWB vs Unix/TS
Date: Wed, 11 Sep 2019 13:52:28 -0400
Message-ID: <009e01d568c9$afd2ca40$0f785ec0$@ronnatalie.com> (raw)
In-Reply-To: <CAFH29tqpO_BScoaQ528aw-J4dp2JgDwOJvkccK24qTrFLmkHYw@mail.gmail.com>

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The Pyramid OS used “conditional symlinks” if I recalled to implement switching the bin directories.

The UCLA LOCUS/IBM Transparent Computing Facility switched versions of executables by using a “magic” directory that was conditional on the cpu type.

 

From: TUHS <tuhs-bounces@minnie.tuhs.org> On Behalf Of Richard Salz
Sent: Wednesday, September 11, 2019 1:49 PM
To: Clem Cole <clemc@ccc.com>
Cc: The Eunuchs Hysterical Society <tuhs@tuhs.org>
Subject: Re: [TUHS] PWB vs Unix/TS

 

> course, this caused a new set of problems of trying to do bug fixes in the two command streams [BTW: Pyramid would try the Universe trick also as did a couple of other folks; but I don't know how they implemented it - as I say, I did it with CDSL].

 

Yes, /bin was a CDSL to /.attbin or /.ucbbin depending on a flag in the proc structure.  The "universe" command queried/set the bit.  The Pyramid kernel was a BSD kernel with the missing ATT syscalls added.  The boot mechanism, at least at first, was BSD. I did things like "rm -rf" /.attbin, /usr/.attinclude, etc., and the system was fine. :)

 


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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>The Pyramid OS used “conditional symlinks” if I recalled to implement switching the bin directories.<br><br>The UCLA LOCUS/IBM Transparent Computing Facility switched versions of executables by using a “magic” directory that was conditional on the cpu type.<o:p></o:p></p><p class=MsoNormal><o:p>&nbsp;</o:p></p><div style='border:none;border-left:solid blue 1.5pt;padding:0in 0in 0in 4.0pt'><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b>From:</b> TUHS &lt;tuhs-bounces@minnie.tuhs.org&gt; <b>On Behalf Of </b>Richard Salz<br><b>Sent:</b> Wednesday, September 11, 2019 1:49 PM<br><b>To:</b> Clem Cole &lt;clemc@ccc.com&gt;<br><b>Cc:</b> The Eunuchs Hysterical Society &lt;tuhs@tuhs.org&gt;<br><b>Subject:</b> Re: [TUHS] PWB vs Unix/TS<o:p></o:p></p></div></div><p class=MsoNormal><o:p>&nbsp;</o:p></p><div><div><p class=MsoNormal><span style='color:#93C47D'>&gt; course, this caused a new set of problems of trying to do bug fixes in the two command streams [BTW: Pyramid would try the Universe trick also as did a couple of other folks; but I don't know how they implemented it - as I say, I did it with CDSL].</span><o:p></o:p></p></div><div><p class=MsoNormal><o:p>&nbsp;</o:p></p></div><div><p class=MsoNormal>Yes, /bin was a CDSL to /.attbin or /.ucbbin depending on a flag in the proc structure.&nbsp; The &quot;universe&quot; command queried/set the bit.&nbsp; The Pyramid kernel was a BSD kernel with the missing ATT syscalls added.&nbsp; The boot mechanism, at least at first, was BSD. I did things like &quot;rm -rf&quot; /.attbin, /usr/.attinclude, etc., and the system was fine. :)<o:p></o:p></p></div><div><p class=MsoNormal><o:p>&nbsp;</o:p></p></div></div></div></div></body></html>

  reply index

Thread overview: 82+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-09  6:25 Warner Losh
2019-09-09  6:36 ` arnold
2019-09-10 15:16 ` Clem Cole
2019-09-11  0:28   ` Steve Johnson
2019-09-11  3:53   ` Warner Losh
2019-09-11 15:36     ` Clem Cole
2019-09-11 16:55       ` [TUHS] IBM Unix source licenses [was " Charles H Sauer
2019-09-12 19:31         ` Kevin Bowling
2019-09-12 20:59           ` Clem Cole
2019-09-12 21:09             ` [TUHS] IBM Unix source licenses - Series/1 NUXI Ronald Natalie
2019-09-12 21:31             ` [TUHS] IBM Unix source licenses [was Re: PWB vs Unix/TS Warner Losh
2019-09-12 22:30             ` jcs
2019-09-12 23:12               ` reed
2019-09-12 23:22                 ` jcs
2019-09-12 23:29               ` [TUHS] IBM Unix source licenses Warren Toomey
2019-09-13  7:06                 ` arnold
2019-09-13  8:30                 ` SPC
2019-09-14 18:29                   ` Warner Losh
2019-09-12 21:29           ` [TUHS] IBM Unix source licenses [was Re: PWB vs Unix/TS Charles H Sauer
2019-09-11 17:49       ` [TUHS] " Richard Salz
2019-09-11 17:52         ` ron [this message]
2019-09-11 21:44           ` Clem Cole
2019-09-11 18:11       ` Larry McVoy
2019-09-11 18:18         ` Richard Salz
2019-09-11 18:54           ` Larry McVoy
2019-09-11 21:05             ` Steve Johnson
2019-09-11 21:34             ` Steve Johnson
2019-09-11 21:57             ` Clem Cole
2019-09-11 22:50               ` Arthur Krewat
2019-09-11 21:59           ` Clem Cole
2019-09-11 21:50         ` Clem Cole
2019-09-11 22:49         ` Dave Horsfall
2019-09-12  3:43           ` [TUHS] SCCS Larry McVoy
2019-09-12  4:20             ` George Michaelson
2019-09-12  4:31               ` [TUHS] [SPAM] SCCS Larry McVoy
2019-09-12 13:44                 ` Tony Finch
2019-09-13  4:11                   ` Larry McVoy
2019-09-13  5:54                     ` Dave Horsfall
2019-09-13  8:00                       ` Peter Jeremy
2019-09-13 15:23                         ` Larry McVoy
2019-09-13 21:36                         ` Dave Horsfall
2019-09-12  4:28             ` [TUHS] SCCS Jon Forrest
2019-09-12  4:33               ` Larry McVoy
2019-09-12  6:12                 ` William Corcoran
2019-09-12 14:35                   ` Clem Cole
2019-09-13  5:22                 ` Dave Horsfall
2019-09-13  5:50                   ` Bakul Shah
2019-09-12 16:45               ` Eric Allman
2019-09-12 17:29                 ` Clem Cole
2019-09-12 17:47                   ` Warner Losh
2019-09-13  8:12                   ` emanuel stiebler
2019-09-13 21:11                     ` Steffen Nurpmeso
2019-09-13 21:17                       ` Larry McVoy
2019-09-13 21:48                         ` Bakul Shah
2019-09-13 23:12                           ` Steffen Nurpmeso
2019-09-13 23:03                         ` Steffen Nurpmeso
2019-09-14  1:55                           ` [TUHS] [SPAM] SCCS Larry McVoy
2019-09-16 17:23                             ` [TUHS] SCCS Steffen Nurpmeso
2019-09-16 20:31                               ` Larry McVoy
2019-09-17 17:57                                 ` Steffen Nurpmeso
2019-09-18  8:48                               ` Eric Allman
2019-09-18 17:33                                 ` Steffen Nurpmeso
2019-09-12 20:07             ` Nemo
2019-09-11 16:05   ` [TUHS] PWB vs Unix/TS Paul Winalski
2019-09-11 17:14     ` ron
2019-09-14  0:44   ` [TUHS] a book (was Re: PWB vs Unix/TS) reed
2019-09-14  2:53     ` Warner Losh
2019-09-15  2:18       ` Jon Steinhart
2019-09-15  2:39         ` Clem Cole
2019-09-15  3:24         ` Adam Thornton
2019-09-14 22:46     ` Clem cole
2019-09-15  0:58       ` Adam Thornton
2019-09-15  3:30         ` Eric Allman
2019-09-15  4:21           ` Larry McVoy
2019-09-15  5:17             ` Jon Steinhart
2019-09-15 20:14               ` Clem Cole
2019-09-15 20:21                 ` Jon Steinhart
2019-09-15 20:12           ` Clem Cole
2019-09-15 21:28             ` Dave Horsfall
2019-09-15 23:27               ` Clem cole
2019-09-15 23:45                 ` Richard Salz
2019-09-15  7:43     ` Andy Kosela

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