[Nut-upsdev] Asking hard questions about the NUT architecture

[Charles Lepple]

On 5/29/07, Eric S. Raymond <esr at thyrsus.com> wrote:
> Christopher X. Candreva <chris at westnet.com>:
> > We have the applications to think about too. It's all well and good to say
> > they should be able to recover gracefully, but to those of us supporting
> > things we didn't write, having the system shut down cleanly just might save
> > me hours of work later.
>
> I don't understand this objection, sorry.  What could NUT's UPS-controlled
> shutdown possibly be doing for you that a shutdown on SIGPWR wouldn't?

Can you elaborate a little on how this SIGPWR shutdown works?
Specifically, what sends the signal, and what happens when it is
received? (I am not referring to the theoretical case of just using
the default powerfail entry in /etc/inittab; examples from working
systems will go a long way to helping us understand what you don't
like about the architecture.)

-- 
- Charles Lepple