62 lines
No EOL
1.6 KiB
Bash
Executable file
62 lines
No EOL
1.6 KiB
Bash
Executable file
#! /bin/bash
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# Path: ${HOME}/bin/brightness.sh
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# Author: Alexander Brunhirl
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# Date: 15.09.2015
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# Version: 0.1
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########################################
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[ ${UID} != 0 ] && echo -e "\033[1;31mERROR:\033[0m Need to be run as root!" >&2 && exit 1
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backlight="/sys/class/backlight/intel_backlight"
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[ ! -d "${backlight}" ] && echo -e "\033[1;31mERROR:\033[0m No such file or directory: ${backlight}">&2 && exit 1
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function main() {
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actual=$(cat ${backlight}/actual_brightness)
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if [ ${actual} == ${1} ]; then
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echo "Already the expected brightness (${actual})"
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exit 0
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else
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echo ${1} > ${backlight}/brightness
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echo "Brightness set to $(cat ${backlight}/actual_brightness)"
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exit 0
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fi
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}
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function usage() {
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echo -e "Usage: $(basename ${0}) <1..10>\n
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\033[1mDESCRIPTION:\033[0m
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This script set the monitor brightness. The values are between 1 for the lowest
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brightness and 10 for the highest.\n
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\033[1mEXIT STATUS:\033[0m
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0 if OK,
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1 if minor problems.\n"
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exit 0
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}
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[ -e ${1} ] && echo -e "\033[1;31mERROR:\033[0m Missing parameter\nRun \`$(basename ${0}) --help\` for more informations" >&2 && exit 1
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case ${1} in
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-h|--help) usage
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;;
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1) main 465
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;;
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2) main 930
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;;
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3) main 1395
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;;
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4) main 1860
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;;
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5) main 2325
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;;
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6) main 2790
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;;
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7) main 3255
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;;
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8) main 3720
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;;
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9) main 4185
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;;
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10) main 4650
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;;
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*) echo -e "\033[1;31mERROR:\033[0m Unknown brightness\nRun \`$(basename ${0}) --help\` for more informations" >&2 && exit 1
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;;
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esac |