Xserve and UPS

Hi all,
I have an UPS with a Xserve connected. Last Night, Lights off an the Xserve shutted down correctly but I want to know How can I detect the proccess that runs when Xserve enters in UPS mode?. I want to programme some scripts based on this feature ...
I have an Smart-UPS 3000.
Thanks and sorry for my English.
Regards,

To confirm, you have your Xserve connected to an APC Smart-UPS UPS device via USB (or network), and the connection worked as designed and the Xserve detected the on-battery power status and the battery status and gracefully shut itself down during a power outage. Right?
What's not so clear to me here is if you want to either look at the device status, or if you want to perform site-specific tasks when the UPS-initiated shutdown is triggered. And if you want to look at the status, when you want to know the status; if you want to get in ahead of the actual shutdown, for instance.
If the former is the case, the bash shell command you probably want is pmset.
For the latter, you can perform various operations during a shutdown using the upsshutdown script.
For these cases, you can use +man pmset+ or +man upsshutdown+ for details.
I don't know off-hand if there's a way to determine when you're on-battery with sufficient power remaining short of polling -- or short of inserting a daemon and some code into some of the (I'm guessing here, but would investigate whether these events are available) IPMI-level event processing. There may well be a daemon available for this task. The ipmitool can fetch you the chassis power, and there's a +Last Power Event : ac-failed+ status. So there's likely a way to this data. (The ipmitool utility doesn't have a man page, though it has internal help and you can Google for the code and for some command-level details.)
Regardless, I fully expect there's a way to get the on-battery notification (and ahead of the shutdown), if that's what you're looking for.

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