[Nut-upsuser] query "Data stale" from the cmdline

[Thomas Jarosch]

Hello,

is there a way to query from the cmdline if the UPS data is stale?

"upsc" outputs a lot of information, but not if the data is stale.
Example output from a "stale" UPS on the server:
(nut version: nut-2.7.2-3.el7)

# upsc apcsmart
battery.charge: 100
battery.charge.low: 10
battery.charge.warning: 50
battery.mfr.date: 2014/09/01
battery.runtime: 1320
battery.runtime.low: 300
battery.temperature: 36.0
battery.type: PbAc
battery.voltage: 25.7
battery.voltage.nominal: 24.0
device.mfr: American Power Conversion
device.model: Smart-UPS 1500
device.serial: ASXXXXXXXXXX
device.type: ups
driver.name: usbhid-ups
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.version: 2.7.2
driver.version.data: APC HID 0.95
driver.version.internal: 0.38
input.sensitivity: high
input.transfer.high: 253
input.transfer.low: 208
input.transfer.reason: input voltage out of range
input.voltage: 233.2
output.frequency: 50.0
output.voltage: 233.2
output.voltage.nominal: 230.0
ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.delay.start: 30
ups.firmware: 601.1.I
ups.firmware.aux: 1.3
ups.load: 38.3
ups.mfr: American Power Conversion
ups.mfr.date: 2002/02/05
ups.model: Smart-UPS 1500
ups.productid: 0002
ups.serial: ASXXXXXXXXXX
ups.status: OL
ups.test.result: No test initiated
ups.timer.reboot: -1
ups.timer.shutdown: -1
ups.timer.start: -1
ups.vendorid: 051d


If there's a way to query this from the cmdline,
this could be monitored from an external system.

The information seems to be part of the network protocol already,
since "client" machines connected to this UPS server reported
the data is stale in the logs. That's how I noticed it in the first place :)

Thanks,
Thomas