status display / reboot & shutdown script for MESH Status board

status.sh

#!/bin/bash
# PIN assign
BUTTON=2
LAN=3
INTERNET=4
NG=14
OK=15

# Command for button
PUSH="sudo reboot"
HOLD="sudo shutdown -h now"

# path to status file
STATUS_PATH=/run/user/1000/status

function DEBUG()
{
	echo DEBUG: $*
}

function check_button()
{
	button=$(cat /sys/class/gpio/gpio$BUTTON/value)
	if [ "$button"  == "0" ]
	then
		DEBUG button pushed
		echo 0 > /sys/class/gpio/gpio$OK/value
		echo 0 > /sys/class/gpio/gpio$NG/value
		for ((i=0; i < 50 ; i++))
		do
			if [ "$(cat /sys/class/gpio/gpio$BUTTON/value)" == "1" ]
			then
				eval $PUSH
				echo 0 > /sys/class/gpio/gpio$OK/value
				echo 0 > /sys/class/gpio/gpio$NG/value
				exit
			fi
			echo 1 > /sys/class/gpio/gpio$NG/value
			sleep .1
			echo 0 > /sys/class/gpio/gpio$NG/value
		done
		eval $HOLD
		echo 1 > /sys/class/gpio/gpio$OK/value
		echo 0 > /sys/class/gpio/gpio$NG/value
		exit
	fi
}

function check_if()
{
	lan=1
	internet=1
	for dev in $(ip a | grep '^[0-9]' | grep -v lo: | awk '{print $2}' | tr -d :)
	do
		dev_type=$(echo $dev | tr -d '[0-9')
		if ip a s dev $dev | grep inet > /dev/null
		then
			# DEBUG $dev is up
			case $dev_type in
				eth) lan=0 ;;
				wlan) lan=0 ;;
				ppp) internet=0 ;;
				wwan) internet=0 ;;
			esac
		fi
	done
	echo $lan > /sys/class/gpio/gpio$LAN/value
	echo $internet> /sys/class/gpio/gpio$INTERNET/value
}

function check_flag()
{
	( [ -f $STATUS_PATH/OK ] && echo 0 || echo 1 ) > /sys/class/gpio/gpio$OK/value
	( [ -f $STATUS_PATH/NG ] && echo 0 || echo 1 ) > /sys/class/gpio/gpio$NG/value
}

for pin in $BUTTON $LAN $INTERNET $NG $OK
do
	echo $pin > /sys/class/gpio/unexport &> /dev/null
done
sleep 1

echo $BUTTON> /sys/class/gpio/export
sleep 2
echo in > /sys/class/gpio/gpio$BUTTON/direction

for pin in $LAN $INTERNET $NG $OK
do
	echo $pin > /sys/class/gpio/export
	sleep 2
	echo out > /sys/class/gpio/gpio$pin/direction
	echo 1 > /sys/class/gpio/gpio$pin/value
done

while [ 1 ]
do
	check_button
	check_if
	check_flag
	sleep 1
done