[TUHS] Clever code (was Re: Re: Stdin Redirect in Cu History/Alternatives?

[segaloco via TUHS]

Has anything material come of later Mach work other than knowledge and influence on other systems?  I don't have a complete picture but it's my understanding that there were plenty of developments after NeXT and OSF had their way with it that aren't reflected in, say, macOS.  Something about said OSs being forked before Mach 3, which is listed in some references as being more true to the micro kernel architecture.

As an aside, I wish Apple would actually engage with their "open source" nature more.  I'd love to plink around in the Darwin kernel but even with Google-fu have never managed to actually get a kernel build all the way through.  Their lack of documentation is a painful matter.  I'd love to bootstrap it on RISC-V if I could get there...

- Matt G.

------- Original Message -------
On Tuesday, December 13th, 2022 at 5:05 PM, Larry McVoy <lm at mcvoy.com> wrote:


> On Tue, Dec 13, 2022 at 04:00:46PM -0700, Andrew Warkentin wrote:
> 
> > On 12/13/22, Larry McVoy lm at mcvoy.com wrote:
> > 
> > > > I'm well aware that QNX has been extremely successful commercially and
> > > > can be found in a wide range of embedded systems. I'm specifically
> > > > talking about architectural influence on other OSes.
> > > 
> > > Minix? QNX predated that.
> > 
> > Yes, QNX predated Minix by several years, but Minix was completely
> > independent and there was no QNX influence on it at all AFAIK.
> 
> 
> Have you talked to Andy and confirmed that? I'd be quite surprised if
> he hadn't played with QNX but who knows. I wouldn't assume he hadn't.
> 
> And forgive me for asking, do you have some axe to grind against QNX
> or something?
> 
> To me, it's not that surprising that the rest of the world didn't copy
> QNX because the rest of the world was either a mono-kernel or it was
> Mach. Don't get me started on Mach, it has defenders but I absolutely
> hate it. Mach is more of a distributed research OS that advertised
> itself as a microkernel. There is nothing micro about Mach. It's
> a big bloated mess.
> --
> ---
> Larry McVoy Retired to fishing http://www.mcvoy.com/lm/boat