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#!/bin/sh
POWER_PATH="/proc/power"
NUM_OUTPUTS=$(find $POWER_PATH -name 'output*' | wc -l)
valid_output() {
[ "$1" -gt "$NUM_OUTPUTS" ] && return 1
[ "$1" -lt "1" ] && return 1
return 0
}
check_output() {
! valid_output $1 && error "Invalid output number"
}
error() {
echo "{\"error\":\"$1\"}"
exit 1
}
set_output() {
echo $2 > $POWER_PATH/relay$1
}
clear_all() {
for i in $(seq 1 $NUM_OUTPUTS); do
echo 1 > $POWER_PATH/clear_ae$i
done
}
report() {
echo "["
for i in $(seq 1 $NUM_OUTPUTS); do
set -- $(cat "/dev/power$i")
# Convert to JSON booleans
state="false"; [ "$1" = "on" ] && state="true"
echo -e "\t{"
echo -e "\t\t\"output\": $i,"
echo -e "\t\t\"engaged\": $state,"
echo -e "\t\t\"active_power\": $2,"
echo -e "\t\t\"energy_sum\": $6,"
echo -e "\t\t\"current_rms\": $3,"
echo -e "\t\t\"voltage_rms\": $4,"
echo -e "\t\t\"power_factor\": $5"
echo -en "\t}"
[ $i -ne $NUM_OUTPUTS ] && echo -e ","
done
echo "]"
}
disable_junk_processes() {
# Otherwise init will continue to respawn them
sed -i \
-e '/ubnt-websockets/s/^/#/' \
-e '/telnetd/s/^/#/' \
-e '/mca[-d]/s/^/#/' \
-e '/lighttpd/s/^/#/' \
/etc/inittab
kill -HUP 1
# Most of these kill cleanly but a few are stubborn so don't ask, tell.
pkill -9 ubnt-websockets
pkill -9 lighttpd
pkill upnpd
pkill telnetd
pkill mca-monitor
pkill mcad
pkill avahi-daemon
}
disable_blinking() {
echo 0 > /proc/led/freq
echo 1 > /proc/led/status
}
if ! grep -E '^#.*mcad$' /etc/inittab 2>&1 > /dev/null; then
disable_junk_processes
disable_blinking
fi
case $1 in
on)
check_output $2
set_output $2 1
report
;;
off)
check_output $2
set_output $2 0
report
;;
report)
report
;;
clear)
clear_all
;;
disable_blinking)
disable_blinking
;;
*)
error "Invalid command"
;;
esac
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