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From: dfh@SCIRTP.UUCP (David F. Hinnant)
Newsgroups: net.unix-wizards
Subject: Putting Job Control in System V?
Message-ID: <267@SCIRTP.UUCP>
Date: Thu, 1-Aug-85 14:04:16 EDT
Article-I.D.: SCIRTP.267
Posted: Thu Aug  1 14:04:16 1985
Date-Received: Sun, 4-Aug-85 04:44:42 EDT
Distribution: net
Organization: SCI Systems, Research Triangle Park, NC
Lines: 40


  We're contemplating putting job control into our generic System V kernel.
We would like opinions on what changes we would have to make to add:

  1)  System V.2 style job control with shell layers (shl) using
      pseudo-ttys.

  2)  BSD style job control with the C shell.

  Specificly:

  Our initial impression is that it would be easier to put System V.2
style job control in.  Is this a valid assumption?

  In comparing the two styles, what are the design tradeoffs?
implementation differences?  Would you do one or the other or both if
given the choice?

  How difficult would it be to add the additional signals needed by BSD
style job control and other changes to a System V kernel?  What exactly
are the changes other than additional signals and a new line discipline?

  I've heard rumors of V.2 job control bugs when it first came out. 
Something to do with the sticky bit?  Could someone explain exactly what
went on?  Do the problems still exist?

  Will System V.3 have the V.2 style job control, or will it be different?
Does anyone know?  Will System V.3 have sockets?

  Which style job control does the Korn shell use?

  As always, I'll summarize and post any mailed response I receive.


				Thanks in advance

-- 
				David Hinnant
				SCI Systems, Inc.
				{decvax, akgua}!mcnc!rti-sel!scirtp!dfh

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From: dfh@SCIRTP.UUCP (David F. Hinnant)
Newsgroups: net.unix
Subject: UNIX file size distribution info?
Message-ID: <270@SCIRTP.UUCP>
Date: Fri, 2-Aug-85 12:25:57 EDT
Article-I.D.: SCIRTP.270
Posted: Fri Aug  2 12:25:57 1985
Date-Received: Sun, 4-Aug-85 07:03:40 EDT
Distribution: net
Organization: SCI Systems, Research Triangle Park, NC
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  I remember seeing a graph or table not too long ago giving the file
size distribution for an average UNIX system.  I.e., there were x files
of size y, x1 files of size y1, etc.  I thought this was in the BSTJ of
last October, but I don't see it now.  Does anybody know where I can find
this info?  Also, any info relating to command distribution by classes of
users (documentation, software engineering, secretarial, etc) is welcome.

					Thanks in advance,
-- 
				David Hinnant
				SCI Systems, Inc.
				{decvax, akgua}!mcnc!rti-sel!scirtp!dfh

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From: dfh@SCIRTP.UUCP (David F. Hinnant)
Newsgroups: net.lan,net.unix-wizards
Subject: socket library under System V?
Message-ID: <284@SCIRTP.UUCP>
Date: Tue, 6-Aug-85 12:05:33 EDT
Article-I.D.: SCIRTP.284
Posted: Tue Aug  6 12:05:33 1985
Date-Received: Sat, 10-Aug-85 20:42:14 EDT
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Xref: linus net.lan:809 net.unix-wizards:11418


  We've been talking with various Ethernet vendors (Interlan, CMC,
Excelan, etc.) concerning implementing Ethernet on our 80286 Multibus
box under UNIX System V.  Software-wise they'll give us a "socket
library", TCP/IP, a driver, and the BSD applications.  All the pieces
are there; it's the "socket library" that has me a bit confused.  4.2
BSD implements sockets in the kernel. I presume the socket library gives
the same functionality, but I don't see how.  Can anyone that has this
kind of library tell me what it actually does?

  Is there a public-domain socket-type library?

  We've heard a lot about SLIP, and we're thinking about puting SLIP on
another machine of ours.  Does SLIP use 4.2 type sockets?

				As always, thanks in advance.

-- 
				David Hinnant
				SCI Systems, Inc.
				{decvax, akgua}!mcnc!rti-sel!scirtp!dfh

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