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

Jochen Kunz jkunz at unixag-kl.fh-kl.de
Thu Apr 17 17:49:29 AEST 2003

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.


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