sb-cpu

#!/bin/bash

sleep_duration_secs=0.3

compute_cpu_utilization() {
    local stats_raw=$(grep -P 'cpu ' "/proc/stat")
    local stats=($stats_raw) # array created from splitting the string on whitespaces
    # echo "$stats_raw"
    local user=${stats[1]};    local nice=${stats[2]};   local system=${stats[3]}
    local idle=${stats[4]};    local iowait=${stats[5]}; local irq=${stats[6]}
    local softirq=${stats[7]}; local steal=${stats[8]}
    # echo "$user $nice $system $idle $iowait $irq $softirq $steal"
    local idle_total=$((idle + iowait))
    local non_idle=$((user + nice + system + irq + softirq + steal))
    local total=$((idle_total + non_idle))

    echo "$total" "$idle_total"
}

read ctotal cidle  <<< $(compute_cpu_utilization)
sleep "$sleep_duration_secs"
read ptotal pidle <<< $(compute_cpu_utilization)

totald=$((ctotal - ptotal))
idled=$((cidle - pidle))

cpu=$(awk "BEGIN {print int(0.5 + 100*100*($totald - $idled)/$totald)/100}")
temp=$(sensors | grep temp1 | cut -d ":" -f 2 | cut -d "+" -f 2 | cut -d "." -f 1)
echo "cpu: ${cpu}% ${temp}°C"