dotfiles/rofi/bin/usedcpu
2021-03-23 10:06:18 +02:00

45 lines
1.1 KiB
Bash
Executable file

#!/usr/bin/env bash
PREV_TOTAL=0
PREV_IDLE=0
cpuFile="/tmp/.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"
if [[ $1 = "-i" ]]; then
echo "${DIFF_USAGE}%"
else
echo "${DIFF_USAGE}%"
fi
else
if [[ $1 = "-i" ]]; then
echo " ?"
else
echo "?"
fi
fi
# Remember the total and idle CPU times for the next check.
echo "${TOTAL}" > "${cpuFile}"
echo "${IDLE}" >> "${cpuFile}"