check_nut not handling errors from upsc command

[arekm]

Not sure if you are maintaining these scripts.

check_nut has a problem when upc driver isn't connected to anything. It incorrectly reports critical instead of unknown state with proper error message.

Example:

# upsc apc-big
Error: Driver not connected
# echo $?
1
# ./check_nut.pl apc-big -w 60 -c 30 -t 40 -T 48 -l 40 -L 60
apc-big CRITICAL: Battery Charge! apc-big WARNING: Status 0 Battery 0%,0s,0V; Input 0V,0Hz|Battery_Charge=0%;60;30 Battery_Runtime=0s;300:;180: Battery_Voltage=0V;12:;11: Input_Voltage=0V;110:130;100:140 Input_Frequency=0Hz;59.8:60.2;59.5:60.5

[arekm]

Also just noticed that it returned that error

apc-big CRITICAL: Battery Charge! apc-big WARNING: Status 0 Battery 0%,0s,0V: Input 0V,0Hz 

but returned state (to nagios) was WARNING instead of CRITICAL. Looks like last one overrides worse states while it shouldn't.