mmap in cdevsw

[Chris Torek]

In article <1989Dec27.132716.7274 at granite.cr.bull.com>
freedman at granite.cr.bull.com (Jerome Freedman) writes:
>  In the cdevsw ( I hope I got that right ) in Berkeley
>systems I see an mmap. I know what the other stuff is
>supposed to do but could some one explain CLEARLY what
>this does, why I would use it and maybe even pointers
>to relevant examples.

In BSD systems, it does nothing: `reserved for future expansion'.
In BSD-*derived* systems (e.g., SunOS), it does different things
depending on the derivative.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris at cs.umd.edu	Path:	uunet!mimsy!chris