[TUHS] Did SunOS 3 have mmap(2)?

[TUHS] Did SunOS 3 have mmap(2)?

[Warren Toomey]

Hi all,
	I just received a query: did SunOS 3 have a working mmap(2)? My
vague memory says no, but I don't have access to a 3.5 box any more to
find out. Can anybody help out here?

	Warren

[TUHS] Did SunOS 3 have mmap(2)?

[Jochen Kunz]

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On 2003.04.11 15:53 Warren Toomey wrote:

> I just received a query: did SunOS 3 have a working mmap(2)?
I don't know. But you may ask Peter Koch, the director of the Sun3 Zoo:
http://www.sun3zoo.de/
Peter knows everything about Sun 3 hardware and has some in deep
knowledge of SunOS. 
-- 


tschüß,
       Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/

[TUHS] Did SunOS 3 have mmap(2)?

[Tim Bradshaw]

* Jochen Kunz wrote:
> I don't know. 

I've just asked someone who knows, and he elaborated my very vague
memory: yes it did, and in fact there was mmap right back, and beyond,
the start of SunOS.  *But* it only mapped devices, particularly
framebuffers, where it was obviously very useful.  SunOS 4 had a
fully-fledged mmap.

I am fairly sure that 4.2BSD had manual pages for mmap, but it didn't
work.

--tim

[TUHS] Did SunOS 3 have mmap(2)?

[Jochen Kunz]

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On 2003.04.16 23:56 Tim Bradshaw wrote:

> I've just asked someone who knows, and he elaborated my very vague
> memory: yes it did, and in fact there was mmap right back, and beyond,
> the start of SunOS. 
Wasn't some mmap like functionality a central concept of MULTICS long
bevore UNIX was born? (I should read that article about MULTICS on the
web again.) 

> *But* it only mapped devices, particularly
> framebuffers, where it was obviously very useful. 
> SunOS 4 had a fully-fledged mmap.
... mostly for implementing shared libs. (?)

> I am fairly sure that 4.2BSD had manual pages for mmap, but it didn't
> work.
AFAIK BSD got a mmap with the MACH-VM in 4.3BSD-Reno. The old VAX-VM had
no mmap.
-- 


tschüß,
       Jochen

Homepage: http://www.unixag-kl.fh-kl.de/~jkunz/