#!/bin/sh
openbsd() {
	CPUS=$(sysctl | grep 'hw.ncpuonline' | sed 's/^.*=//')
	TOTALUSAGE=$(ps aux | awk '{print $3}' | sed '1d' | sort | paste -s -d+ - | bc)
    USAGE=$(printf "$TOTALUSAGE / $CPUS\n" | bc -l)
    printf "$USAGE" | grep "^\.[0-9]" > /dev/null && printf "0$(printf $USAGE | cut -c1-3)%%" ||
	printf "$(printf "$USAGE" | cut -c1-4)%%\n"
}

linux () {
	TOTAL="$(ps axch -o cmd,%cpu --sort=-%cpu | sed 's/ //' | egrep -o " [0-9].*" | sed 's/ //' | paste -s -d+ - | bc)"
	USAGE="$(printf "$(printf "$TOTAL / $(nproc)\n" | bc -l | cut -c1-4)%%\n")"
	printf -- "$USAGE%" | grep "^\.[0-9]" > /dev/null && printf -- "0$(printf -- $USAGE% | cut -c1-3)%%" || printf -- "$(printf -- "$USAGE%" | cut -c1-4)%%\n"
}

case $(uname) in
	OpenBSD) openbsd ;;
	Linux) linux ;;
esac