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130 lines
2.3 KiB
130 lines
2.3 KiB
3 years ago
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#!/bin/sh
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# Control the processor characteristics
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# Depends: -
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b="$(tput bold)"
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u="$(tput smul)"
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red="$(tput setf 4)"
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n="$(tput sgr0)"
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help() {
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cat << EOF
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${b}NAME${n}
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cpuctl - control the processor characteristics
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${b}SYNOPSIS${n}
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${b}cpuctl${n} ${u}OPTION${n} [${u}ARG${n}]
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${b}OPTIONS${n}
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${b}-h${n}, ${b}--help${n} Display usage message and exit.
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${b}-l${n}, ${b}--list${n}
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List the available energy performance modes.
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${b}-g${n}, ${b}--get${n}
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Get the energy performance mode.
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${b}-s${n}[${u}MODE${n}], ${b}--set [${n}${u}MODE${n}]
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Set the energy performance to ${U}MODE${N}, asks for the mode if left empty.
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EOF
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}
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# Exit if no option is provided
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[ "$#" -eq 0 ] && help && exit 1
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# Main program
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# --------------------------------------
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listModes()
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{
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modes="/sys/devices/system/cpu/cpufreq/policy0/energy_performance_available_preferences"
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tr ' ' '\n' < "$modes" | sed '/^$/d' \
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| awk -v line="$1" '{ if (line == "") print NR") "$0; else if (NR == line) print $0; }'
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}
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getMode()
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{
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mode="/sys/devices/system/cpu/cpufreq/policy0/energy_performance_preference"
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cat "$mode"
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}
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setMode()
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{
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option="$1"
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if [ -z "$option" ]; then
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listModes
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printf "Enter the number to set: "
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read -r option
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fi
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mode="$(listModes "$option")"
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if ! sudo -v; then
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echo "${b}${red}Error:${n} setting energy performance mode requires root privileges." >&2
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exit 1
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fi
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for i in /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference; do
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echo "$mode" | sudo tee "$i" > /dev/null
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done
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}
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# Option parsing
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# --------------------------------------
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script="$(basename "$0")"
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parsed="$(getopt --options "hlgs::" --longoptions "help,list,get,set::" -n "$script" -- "$@" 2>&1)"
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result="$?"
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# Exit if invalid option is provided
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if [ "$result" -ne 0 ]; then
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echo "$parsed" | head -n 1 >&2
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echo "Try './$script --help' for more information." >&2
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exit 1
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fi
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eval set -- "$parsed"
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while true; do
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case "$1" in
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-h)
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help
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exit
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;;
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-l | --list)
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option="list"
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shift
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;;
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-g | --get)
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option="get"
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shift
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;;
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-s | --set)
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option="set"
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shift
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;;
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--)
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shift
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break
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;;
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*)
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break
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;;
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esac
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done
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# Execute
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# --------------------------------------
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case "$option" in
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list)
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listModes
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;;
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get)
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getMode
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;;
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set)
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setMode "$1"
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;;
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esac
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