make POSIX sh compliant

bin/st-power

@@ -1,10 +1,10 @@
 #!/bin/sh
 
-# for UPS monitoring with pwrstatd
+# for UPS monitoring with NUT 
 #
-#POWER="$(pwrstat -status | grep "Load" | awk '{print $2}')W"
-#CHARGE=$(pwrstat -status | grep "Battery Capacity" | awk '{print $3$4}')
-#if [[ "$CHARGE" == "100%" ]]; then
+#POWER="$(upsc titanium-power@localhost | grep ups.realpower: | awk '{print $2}')W"
+#CHARGE="$(upsc titanium-power@localhost | grep battery.charge: | awk '{print $2}')%"
+#if [ "$CHARGE" = "100%" ]; then
 #  echo $POWER
 #else
 #  echo "$CHARGE $POWER"