Gentoo Linux电池电量低于7%报警脚本

自娱自乐，旨在记录，以便日后查阅，高手请路过。

#!/bin/bash
FULL=`cat /proc/acpi/battery/BAT0/info | grep full | cut -c 26-30`
PRESENT=`cat /proc/acpi/battery/BAT0/state | grep remaining | cut -c 26-30`
# STATE=`expr $PRESENT / $FULL`
STATE=`echo "scale=2;$PRESENT / $FULL * 100" | bc | cut -d . -f 1`
AC=`cat /proc/acpi/ac_adapter/ADP1/state | cut -c 26-28`
if [ $STATE -le 7 -a $AC = off ]; then
     wall "Full power of the battery is $FULL. Present power of the battery is $PRESENT. $STATE% power is remain... Please char   ge..."
    mpg123 /home/zeur/icons/batteryAlarm.mp3 &> /dev/null
    mpg123 /home/zeur/icons/batteryAlarm.mp3 &> /dev/null
    mpg123 /home/zeur/icons/batteryAlarm.mp3 &> /dev/null
    mpg123 /home/zeur/icons/batteryAlarm.mp3 &> /dev/null
    mpg123 /home/zeur/icons/batteryAlarm.mp3 &> /dev/null
    sleep 10
    /home/zeur/script/batteryAlarm.sh
    fi
if [ $STATE -gt 7 -o $AC = 'on-' ]; then
    sleep 60
    /home/zeur/script/batteryAlarm.sh
fi
unset FULL PRESENT STATE