Dual Universes

[Melinda Shore]

In article <1991May1.213542.248 at eng.umd.edu> stripes at eng.umd.edu (Joshua Osborne) writes:
>In article <1991Apr30.233337.6112 at kithrup.COM> sef at kithrup.COM (Sean Eric Fagan) writes:
>[...]
>>Better yet, let's start from scratch and do everything better.  Then write
>>equivalent commands and compatible library functions.
>
>Isn't this what Mach is all about?  

No.  Mach is a research OS that is being commercialized.  The Unix
stuff that runs on top of Mach (3.0 that is - Mach 2.5 and earlier is
deeply embedded in the 4.3BSD kernel and is almost certainly not what
you're thinking of) makes extensive use of Unix source, as well as
source from hardware vendors for drivers, math libraries, boot code,
etc.  For rewrites of existing software you're better off looking to
CSRG and the FSF.
-- 
                    Software longa, hardware brevis
Melinda Shore - Cornell Information Technologies - shore at theory.tn.cornell.edu