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#!/bin/bash
# FVWM-Crystal helper script that put the omputer in hibernation
# when the battery is low
# Usage: Exec exec $[FVWM_SYSTEMDIR]/scripts/AutoHibernate <rate [%]>
# the PID to kill if fvwm is interrupted
TMPFILE="/tmp/crystal_autohibernate_$$"
touch ${TMPFILE}
cleanup() {
rm ${TMPFILE}
exit 0
}
trap cleanup INT QUIT TERM
if [[ ! "$1" ]]; then
cleanup
fi
# write the preference file
echo "Exec exec ${FVWM_SYSTEMDIR}/scripts/AutoHibernate $1" > ${FVWM_USERDIR}/preferences/AutoHibernation
# the main loop
CurrentCharge=$(($(cat /sys/class/power_supply/BAT0/energy_now)/(($(cat /sys/class/power_supply/BAT0/energy_full)/100))))
MinCharge=$(($1+1))
Resumed="0"
while :
do
sleep "5"
# fvwm is started by exec; be sure it is running
pidof fvwm 1>/dev/null || cleanup
if [[ "$CurrentCharge" -lt "$MinCharge" ]]; then
# avoid hibernation loop
if [[ "${Resumed}" == "0" ]] ; then
# mplayer doesn't like hibernation
${FVWM_SYSTEMDIR}/scripts/killmplayer 9
killall -9 mplayer 2>/dev/null
sudo pm-hibernate
# we must kill that script after rebbot to avoid loop
Resumed="1"
else
CurrentCharge=$(($(cat /sys/class/power_supply/BAT0/energy_now)/(($(cat /sys/class/power_supply/BAT0/energy_full)/100))))
fi
else
CurrentCharge=$(($(cat /sys/class/power_supply/BAT0/energy_now)/(($(cat /sys/class/power_supply/BAT0/energy_full)/100))))
# return to normal loop after resuming when CurrentCharge > $1
if [[ "$CurrentCharge" -gt "$MinCharge" ]]; then
Resumed="0"
fi
fi
done
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