APC UPS control system - Manual (Page 104)

commfailure This event is generated each time the communications line
with the computer is severed. This event is not detected on dumb
signaling UPSes.
Default -does a printf ‘‘Warning serial port communications
with UPS lost.’’
| wall then exits.
commok After a commfailure event is issued, when the communications
to the computer is re-established, this event will be generated.
Default — does a printf ‘‘Serial communications with UPS
restored.’’
| wall then exits.
doreboot This event is depreciated and should not be used.
Default - does a reboot of the system by calling shutdown -h now
doshutdown When the UPS is running on batteries and one of the limits
expires (time, run, load), this event is generated to cause the machine
to shutdown.
Default does a shutdown of the system by calling shutdown -h now
emergency Does an emergency shutdown of the system by calling
shutdown -h now
failing This event is generated when the UPS is running on batteries and
the battery power is exhausted. The event following this one will be
a shutdown.
Default — does a printf ‘‘UPS battery power exhausted.
Doing shutdown. \n’’ | wall then exits.
loadlimit This event is generated when the battery charge is below the
low limit specified in the apcupsd.conf file.
Default — does a printf ‘‘UPS battery discharge limit
reached. Doing shutdown. \n’’ | wall then exits. After com-
pleting this event, apcupsd will immediately initiate a doshutdown
event.
mainsback This event is generated when the mains power returns after
a powerout condition. The shutdown event may or may not have
been generated depending on the paramaters you have defined and
the length of the power outage. A cancel of a shutdown should never
be attempted as it is very unlikely to succeed and will almost surely
leave your machine in a indeterminate state.
Default — attempts to cancel the shutdown with a shutdown -c (not
sure about that!!!!)
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