#!/bin/bash

set -e

print() {
	printf "%-15s: %s %s\n" "$1" "$2 $3" "$4"
}

cpu_frequency() {
	for i in /sys/devices/system/cpu/cpufreq/policy* ; do 
		local cpus=$(cat $i/affected_cpus|sed -e 's/^\([0-9]\).*\([0-9]\+\)$/\1-\2/')
		local mhz=$(cat $i/scaling_cur_freq|awk '{printf "%.2f",$_/1000}')
		local gov=$(cat $i/scaling_governor)

		echo "CPU $cpus"
		print "  freq" $mhz "MHz"
  		print "  gov" $gov
	done
}

cpu_count() {
        set -- /sys/devices/system/cpu/cpu[0-9]*
	print "CPU count" $#
}

temp() {
	for i in /sys/class/thermal/thermal_zone* ; do
		local type=$(cat $i/type|tr '[a-z]' '[A-Z]'|sed -e 's/-THERMAL/ Temp/')
		local temp=$(cat $i/temp|awk '{printf "%.2f",$_/1000}')
		print "$type" $temp "C"
	done
}

usage() {
	echo "Usage: $0 [-w] [-h]"
}

all() {
	cpu_count
	cpu_frequency
	temp
}


WATCH=""
for i in "$@"; do
	case $i in
	-w)
		WATCH=1
		shift
		;;
	-h|--help)
		usage
		exit 0
		;;
	*)
		usage
		exit 1
		;;
	esac
done

if [ -n "$WATCH" ]; then
	exec watch -n0.5 "$0"
else
	all
fi