cpu-switcher

#!/bin/bash


# Developed for Linux
# License: GNU GPL v.3		http://www.gnu.org/licenses/gpl-3.0.en.html
# Version 1
# Destiny: Switcher for CPU frequency scaling governors  ( for gamers )
# Script usage: bash script --help

##--------------------------------------{
##	Better solutions than this script 
##		1. Plug-in " monitor CPU frequency " in side Mate desktop. 
##		2. " cpupower-gui " app 
##		3. Example Alias
##		###########################{
##		CPU_WAKE_UP(){
##		echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
##		}
##
##		CPU_SLEEP() {
##		echo powersave | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
##		}
##
##		alias cpu.up='CPU_WAKE_UP'
##		alias cpu.down='CPU_SLEEP'
##		alias cpu.status='cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor'
##		###########################}
##				To refresh:		 source ~/.bashrc
##				unlock: 		chattr -i .bashrc
##				lock:		chattr +i .bashrc
##--------------------------------------}


## Doc:
##		http://dcjtech.info/topic/cpu-frequency-scaling-governors/
##		https://www.kernel.org/doc/html/v5.0/admin-guide/pm/cpufreq.html


#####	VARIABLES	########## {

PATH_CPU_POWER="$HOME/.config/cpu.power"

##	STATUS_CPU ( variable ) Only first Line
read -r STATUS_CPU < /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

STATUS_ICON=$(readlink link.svg)
############################ }


#####	FUNCTIONS	################################ {

LIST_GOVERNORS() {
##	Only for one policy
cat /sys/devices/system/cpu/cpufreq/policy0/scaling_available_governors 
}

SET_PERFORMANCE() {
##	"pkexec" instead "sudo"
echo performance | pkexec tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
}

SET_POWERSAVE() {
echo powersave | pkexec tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
}

REFRESH_LINK() {
if [[ ! $STATUS_CPU == $STATUS_ICON ]] ; then
	if [[ $STATUS_CPU == performance ]] ; then ln -fs $PATH_CPU_POWER/weather-clear-symbolic.svg link.svg  ; fi
	if [[ $STATUS_CPU == powersave   ]] ; then ln -fs $PATH_CPU_POWER/weather-clear-night-symbolic.svg link.svg  ; fi
fi
}

SWITCH() {
	#if [[ $STATUS_CPU == performance ]] ; then SET_POWERSAVE ; REFRESH_LINK ; fi
	#if [[ $STATUS_CPU == powersave   ]] ; then SET_PERFORMANCE ; REFRESH_LINK ;fi
	if [[ $STATUS_CPU == performance ]] ; then SET_POWERSAVE ;   fi
	if [[ $STATUS_CPU == powersave   ]] ; then SET_PERFORMANCE ; fi

	DATA_1=$(cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor)
	#DATA_2=$(basename $(readlink link.svg))

	#zenity --no-wrap --info --text "$DATA_1 \n $DATA_2"
	zenity --no-wrap --info --text "$DATA_1"  
	
}
#################################################### }


case "$1" in
    "--help"|"-h")
		echo "---------------------------------------------------------"
		echo " Switcher for CPU frequency scaling governors  "
		echo " "
		echo " "
		echo " Options:"
		echo "   -l  --list         List available scalable governors"
		echo " "
		echo "   -r  --refresh      ( Not working for now ) Refresh link icon. Add command with this option on computer startup. "
		echo "                      Example for cron:	@reboot      sleep 10 && cpu.sh -r   "
		echo " "
		echo "   -s  --switch       Switches from powersave to performance and vice versa "
		echo " "
		echo "   -h  --help         Show this help."
		echo "---------------------------------------------------------"
		exit 0
    ;;
	"-l"|"--list")
		LIST_GOVERNORS
	;;
	"-r"|"--refresh")
		echo "Option is off" ; exit
		REFRESH_LINK
	;;
	"-s"|"--switch")
		SWITCH
	;;
	*)
		echo "Invalid option. "
		echo "For more info write $0 --help "
	;;
esac