petit fix

Cette version fixe une petite erreur. En effet, Lorsque la batterie n'est pas inseré, la variable $CHARGING_STATE se retrouvait vide et donc le if renvoyait une erreur concernant les arguments.

version corrigée :


#!/bin/sh
#
###############################################################################
# Copyright (C) 2005 Francois COJEAN

# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
###############################################################################

# This script tests if a battery is plugged or not, set
# the cpufreq scaling_governor depending on the state of the battery, and
# the trip_points file to avoid the "critical temperature reached" error.
# Note : this script need to be run as root.

# Set up the different variables
# Edit all this variable to value which fit to your computer

BATTERY_NAME="BAT0"
BATTERY_ACPI_PATH="/proc/acpi/battery"
BATTERY_STATE_FILE="state"
POWERSAVE_SCALING_GOVERNOR="powersave"
CONSERVATIVE_SCALING_GOVERNOR="conservative"
CPU_FREQ_PATH="/sys/devices/system/cpu/cpu0/cpufreq"
SCALING_GOVERNOR_FILE="scaling_governor"
TEMPERATURE_ACPI_PATH="/proc/acpi/thermal_zone/THRS"
TEMPERATURE_TRIP_POINTS_FILE="trip_points"
# Becarefull, choose special values related to your processor.
# The value are organised like that :
# critical:hot:passive:active0:...:activeX
# where critical, hot, passive, active0..x is a value in Celsius for the
# corresponding trip point. x is between 0 and 9 and depends on your
# platform.
# See : http://acpi.sourceforge.net/documentation/thermal.html
TEMPERATURE_VALUE="95:0:75:0:0"


# Get the state of the battery
PRESENT="`cat $BATTERY_ACPI_PATH/$BATTERY_NAME/$BATTERY_STATE_FILE | grep present: | cut -f2 -d:`"

if [ $PRESENT = "yes" ]; then
CHARGING_STATE="`cat $BATTERY_ACPI_PATH/$BATTERY_NAME/$BATTERY_STATE_FILE | grep "charging state:" | cut -f2 -d:`"
else
CHARGING_STATE="empty"
fi

# Check the state of the battery
if [ $PRESENT = "yes" -a $CHARGING_STATE = "discharging" ]; then
# Set cpu_freq scaling_governor to powersave.
# This command need to be run as root.
echo "$POWERSAVE_SCALING_GOVERNOR" > $CPU_FREQ_PATH/$SCALING_GOVERNOR_FILE
echo "CPU_FREQ : $POWERSAVE_SCALING_GOVERNOR enable"
else
# Set cpu_freq scaling_governor to conservative.
# This command need to be run as root.
echo "$CONSERVATIVE_SCALING_GOVERNOR" > $CPU_FREQ_PATH/$SCALING_GOVERNOR_FILE
echo "CPU_FREQ : $CONSERVATIVE_SCALING_GOVERNOR enable"
fi

# Modification of the critical temperature value
# This command need to be run as root.
echo -n "$TEMPERATURE_VALUE" > $TEMPERATURE_ACPI_PATH/$TEMPERATURE_TRIP_POINTS_FILE
echo "ACPI : trip_points change to $TEMPERATURE_VALUE"