UbuntuFreunde

Quellcode

#!/bin/bash
#
# acerfand - Rudimentary automatic fan control for noisy Acer Aspire One models
#
# Author Rachel Greenham
#
# version 0.01

LOGGER=$(which logger)
if [ ! -x $LOGGER ] ; then
LOGGER="/usr/bin/logger"
fi
if [ ! -x $LOGGER ] ; then
echo "Warning, logger can't be found. Will log to stdout"
unset LOGGER
fi

LOGLEVEL="info"

log() {
if [ ! -z "$LOGGER" ] ; then
$LOGGER -p daemon.$LOGLEVEL -t acerfand "$@"
else
echo "$@"
fi
}

info() {
LOGLEVEL="info"
log "$@"
}

notice() {
LOGLEVEL="notice"
# log "$@"
}

err() {
LOGLEVEL="err"
log "$@"
}

if pgrep acerfand | grep -v $$ > /dev/null; then
info "acerfand already running"
exit 0
fi

ME=$(readlink -f $0)

ACEREC=$(which acer_ec.pl)
if [ -z $ACEREC ] ; then
ACEREC=$(dirname $ME)/acer_ec.pl
fi

if [ ! -r $ACEREC ] ; then
err "acer_ec.pl can't be found"
exit 1
fi

INTERVAL=5
FANOFF=60
FANAUTO=70

if [ -r "/etc/acerfand.conf" ] ; then
source "/etc/acerfand.conf"
fi

R_FAN=55
R_TEMP=58

FAN_CMD_OFF=21 # verändert von 1f auf 21 bei BIOS-Version3308
FAN_CMD_AUTO=0 # verändert von 00 auf 0 bei BIOS-Version3308

FAN_STATE_UNRECOGNIZED=0
FAN_STATE_AUTO=1
FAN_STATE_OFF=2
FAN_STATE_NAMES=("Unrecognized" "Auto" "Off")
FAN_STATE_CMDS=("$FAN_CMD_OFF" "$FAN_CMD_AUTO" "$FAN_CMD_OFF")

acer_ec() {
perl $ACEREC $@
}

getTemp() {
TEMP=$[$(acer_ec ?= $R_TEMP | cut -f 3 -d' ')]
notice "temp: $TEMP"
}

getRawFanState() {
RAW_FAN_STATE=$(acer_ec ?= $R_FAN | cut -f 3 -d' ')
}

getFanState() {
FAN_STATE=$FAN_STATE_UNRECOGNIZED
getRawFanState
if [ "$RAW_FAN_STATE" == "0x21" ]; then # verändert von 0x1f auf 0x21 bei BIOS-Version3308
FAN_STATE=$FAN_STATE_OFF
else
let A="$RAW_FAN_STATE & 0x10" || true
if [ "$A == 0" ] ; then
# ASSUMPTION: All values with nybble 1==0 denote auto
FAN_STATE=$FAN_STATE_AUTO
fi
fi
notice "read fan state ${FAN_STATE_NAMES[$FAN_STATE]}"
}

setFan() {
info "Set fan ${FAN_STATE_NAMES[$1]}"
acer_ec := $R_FAN ${FAN_STATE_CMDS[$1]} > /dev/null
}

govern() {
trap "info exiting;setFan $FAN_STATE_AUTO; exit" INT TERM EXIT
info "Starting to govern acer fan speed. Interval: $INTERVAL, fan-off: $FANOFF, fan-auto: $FANAUTO"
while true; do
getTemp
getFanState
case "$FAN_STATE" in
$FAN_STATE_AUTO)
if [ "$TEMP" -le "$FANOFF" ] ; then
setFan $FAN_STATE_OFF
fi
;;
$FAN_STATE_OFF)
if [ "$TEMP" -ge "$FANAUTO" ] ; then
setFan $FAN_STATE_AUTO
fi
;;
*)
# weird state. Let's turn it off,
# then decide next time around
setFan $FAN_STATE_OFF
;;
esac
sleep $INTERVAL
done
}

set -e

govern &