#!/bin/bash

if [ "$EUID" -ne 0 ]
  then echo "Please run as root"
  exit
fi

#set -x

msg() {
	./ssd1306_bin "$@"
}

netaddrs() {
	ip -p -o -br -4 address show | (
	current_line=1
	while IFS= read -r line; do
		IFS=' ' read -r -a iface <<< "$line"
		if [[ "${iface[0]}" == lo* ]]; then
			continue
		fi

		msg -x0 -y$current_line -m "${iface[0]} ${iface[1]}  "
		((current_line=current_line+1))
		if [[ ${#iface[@]} -gt 2 ]]; then
			for addr in ${iface[@]:2}; do
				msg -x4 -y$current_line -l "${addr}"
				((current_line=current_line+1))
			done
		fi
	done
	)
}

title=`hostname`
COLUMNS=15
text="`printf "%*s\n" $(((${#title}+$COLUMNS)/2)) "$title"`"
msg -I 128x64 -c -i 0 -x 0 -y 0 -f 1 -l "$text"


while true; do
	netaddrs
	msg -f 0 -x 8 -y 6 -l "`date '+%Y-%m-%d %H:%M:%S'`"
	msg -x0 -y7 -l "`cut -d" " -f1-3 /proc/loadavg`"
	sleep 1
done