Introdução
O script abaixo permite lembrar os níveis de brilho dependendo da fonte de energia usada por um laptop. O padrão é 50% na bateria, 90% na CA.
Visão geral de opções e uso
source_monitor.sh [-a INT] [-b INT] [-v] [-h]
-a set initial brightness on AC adapter
-b set initial brightness on batter
-v enable verbose output
-h prints this help text
Instalação
Instalação usando git através do terminal:
- Executar
sudo apt-get install git para instalar git
- Executar
mkdir $HOME/bin . Ignore esta etapa se $HOME/bin já existir
-
cd $HOME/bin
- Executar
git clone https://github.com/SergKolo/sergrep.git
- O script estará em
$HOME/bin/sergrep/source_monitor.sh . Certifique-se de que o script seja executável com chmod +x $HOME/bin/sergrep/source_monitor.sh
- Adicione o script como um aplicativo de inicialização. Procure o menu Startup Applications na pesquisa do Unity Dash ou Gnome. Como alternativa, execute o comando
gnome-session-properties no terminal para ativar o menu. Adicione o caminho completo ao script como aplicativo de inicialização para que ele seja iniciado toda vez que você efetuar login na GUI.
Como alternativa, você pode copiar e salvar a fonte do script por si mesmo, chmod +x file , e passar pela etapa 6 descrita acima.
Para fazer o script iniciar automaticamente toda vez que você se conectar ao Gnome ou ao Unity, use o utilitário Startup Applications .
Origem do script
#!/usr/bin/env bash
#
###########################################################
# Author: Serg Kolo , contact: [email protected]
# Date: June 18th 2016
# Purpose: Script that remembers and sets brightness
# depending on power sources
#
# Written for: https://askubuntu.com/q/788383/295286
# Tested on: Ubuntu 16.04 LTS , Ubuntu Kylin 16.04 LTS
###########################################################
# Copyright: Serg Kolo , 2016
#
# Permission to use, copy, modify, and distribute this software is hereby granted
# without fee, provided that the copyright notice above and this permission statement
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
ARGV0="$0"
ARGC=$#
wait_ac_connect()
{
while ! on_ac_power ; do : ; sleep 0.25 ; done
$VERBOSE && echo "<<< adapter plugged in"
}
wait_ac_disconnect()
{
while on_ac_power ; do : ; sleep 1.25 ; done
$VERBOSE && echo "<<< adapter unplugged"
}
change_brightness()
{
qdbus org.gnome.SettingsDaemon \
/org/gnome/SettingsDaemon/Power \
org.gnome.SettingsDaemon.Power.Screen.SetPercentage "$1"
}
get_brightness()
{
qdbus org.gnome.SettingsDaemon \
/org/gnome/SettingsDaemon/Power \
org.gnome.SettingsDaemon.Power.Screen.GetPercentage
}
print_usage()
{
cat <<EOF
source_monitor.sh [-a INT] [-b INT] [-v] [-h]
-a set initial brightness on AC adapter
-b set initial brightness on batter
-v enable verbose output
-h prints this help text
Copyright Serg Kolo , 2016
EOF
}
parse_args()
{
# boiler-pate code for reusing, options may change
local OPTIND opt # OPTIND must be there,
# opt can be renamed to anything
# no leading : means errors reported(which is what i want)
# : after letter means options takes args, no : - no args
while getopts "a:b:vh" opt
do
case ${opt} in
a) AC_PERCENTAGE="${OPTARG}"
;;
b) BAT_PERCENTAGE="${OPTARG}"
;;
v) VERBOSE=true
;;
h) print_usage && exit 0
;;
\?)
echo "Invalid option: -$OPTARG" >&2
;;
esac
done
shift $((OPTIND-1))
}
main()
{
# default values, if -a,-b, or -v options given
# they will be changed
local BAT_PERCENTAGE=50
local AC_PERCENTAGE=90
local VERBOSE=false # for debugging
parse_args "$@"
while true
do
if on_ac_power ; then
wait_ac_disconnect
AC_PERCENTAGE=$(($(get_brightness)+1)) # too long to explain why +1
# just try it for yourself
sleep 0.25
change_brightness "$BAT_PERCENTAGE" > /dev/null
else
wait_ac_connect
BAT_PERCENTAGE=$(($(get_brightness)+1))
sleep 0.25
change_brightness "$AC_PERCENTAGE" > /dev/null
fi
sleep 0.25
done
}
main "$@"