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#!/bin/bash
## Files and Data
PREV_TOTAL=0
PREV_IDLE=0
cpuFile="/tmp/.cpu_usage"
## Get CPU usage
get_cpu() {
if [[ -f "${cpuFile}" ]]; then
fileCont=$(cat "${cpuFile}")
PREV_TOTAL=$(echo "${fileCont}" | head -n 1)
PREV_IDLE=$(echo "${fileCont}" | tail -n 1)
fi
CPU=(`cat /proc/stat | grep '^cpu '`) # Get the total CPU statistics.
unset CPU[0] # Discard the "cpu" prefix.
IDLE=${CPU[4]} # Get the idle CPU time.
# Calculate the total CPU time.
TOTAL=0
for VALUE in "${CPU[@]:0:4}"; do
let "TOTAL=$TOTAL+$VALUE"
done
if [[ "${PREV_TOTAL}" != "" ]] && [[ "${PREV_IDLE}" != "" ]]; then
# Calculate the CPU usage since we last checked.
let "DIFF_IDLE=$IDLE-$PREV_IDLE"
let "DIFF_TOTAL=$TOTAL-$PREV_TOTAL"
let "DIFF_USAGE=(1000*($DIFF_TOTAL-$DIFF_IDLE)/$DIFF_TOTAL+5)/10"
echo "${DIFF_USAGE}"
else
echo "?"
fi
# Remember the total and idle CPU times for the next check.
echo "${TOTAL}" > "${cpuFile}"
echo "${IDLE}" >> "${cpuFile}"
}
## Get Used memory
get_mem() {
printf "%.0f\n" $(free -m | grep Mem | awk '{print ($3/$2)*100}')
}
## Get Brightness
get_blight() {
CARD=`ls /sys/class/backlight | head -n 1`
if [[ "$CARD" == *"intel_"* ]]; then
BNESS=`xbacklight -get`
LIGHT=${BNESS%.*}
else
BNESS=`blight -d $CARD get brightness`
PERC="$(($BNESS*100/255))"
LIGHT=${PERC%.*}
fi
echo "$LIGHT"
}
## Get Battery
get_battery() {
BAT=CMB0
cat /sys/class/power_supply/${BAT}/capacity
}
## Execute accordingly
if [[ "$1" == "--cpu" ]]; then
get_cpu
elif [[ "$1" == "--mem" ]]; then
get_mem
elif [[ "$1" == "--blight" ]]; then
get_blight
elif [[ "$1" == "--bat" ]]; then
get_battery
fi
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