>> >  Dan J Fraser <dfraser@mother.com> wrote:
>> >  > I'd like to set up NetBSD to automatically shut down my UPS during a power
>> >  > failure... monitoring the UPS is not a problem, but I need to send an
>> >  > ioctl to the serial port to tell the UPS to shut off power to the computer
>> >  > after NetBSD has shut down completely.
>> 
>> The UPS (APC Back-UPS 400) requires a high RS-232 level signal to one of
>> it's pins in order to shut down the power.  

Pitty.  I have scripts that do all this for an APC Smart-UPS.

BTW for unattended systems, you generally do NOT want to power down the UPS.
I don't know about the Back-UPS, but if the host tells a Smart-UPS to
power down,  it does not come back up when the power does.  Nasty!  I
had a cluster of machines down all weekend as a result.

I now just let the UPS run, and I have it programmed not to restart
the computer until it has at least 10% capacity restored.

--sjg
-- 
Simon J. Gerraty        <sjg@quick.com.au>

#include <disclaimer>   /* imagine something _very_ witty here */