Let's have a look at the manual entry for the command
upsd of the
NUT package :
NAME upsd - UPS information server SYNOPSIS upsd -h upsd [OPTIONS] ... OPTIONS -h Display the help text.
Ok, let's try it.
# upsd # echo $? 1 # upsd -h # echo $? 1 : after editing nut.conf # upsd -h Network UPS Tools upsd 2.7.4 Network server for UPS data. ... # echo $? 0
I guess if there is a parse error in
upsd.conf they call
Why not print ANY error message ?