mirror of
https://github.com/lm-sensors/lm-sensors.git
synced 2026-10-28 12:40:42 +00:00
Jean Delvare
8ddd1d2984
before starting any fan control operation. git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@5770 7894878c-1315-0410-8ee3-d5d059ff63e0
488 lines
12 KiB
Bash
Executable File
488 lines
12 KiB
Bash
Executable File
#!/bin/bash
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#
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# Simple script implementing a temperature dependent fan speed control
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# Supported Linux kernel versions: 2.6.5 and later
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#
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# Version 0.70
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#
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# Usage: fancontrol [CONFIGFILE]
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#
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# Dependencies:
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# bash, egrep, sed, cut, sleep, readlink, lm_sensors :)
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#
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# Please send any questions, comments or success stories to
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# marius.reiner@hdev.de
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# Thanks!
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#
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# For configuration instructions and warnings please see fancontrol.txt, which
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# can be found in the doc/ directory or at the website mentioned above.
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#
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#
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# Copyright 2003 Marius Reiner <marius.reiner@hdev.de>
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# Copyright (C) 2007-2009 Jean Delvare <khali@linux-fr.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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# MA 02110-1301 USA.
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#
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#
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PIDFILE="/var/run/fancontrol.pid"
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#DEBUG=1
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MAX=255
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declare -i pwmval
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function LoadConfig {
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echo "Loading configuration from $1 ..."
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if [ ! -r "$1" ]
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then
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echo "Error: Can't read configuration file"
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exit 1
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fi
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# grep configuration from file
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INTERVAL=`egrep '^INTERVAL=.*$' $1 | sed -e 's/INTERVAL=//g'`
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DEVPATH=`egrep '^DEVPATH=.*$' $1 | sed -e 's/DEVPATH= *//g'`
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DEVNAME=`egrep '^DEVNAME=.*$' $1 | sed -e 's/DEVNAME= *//g'`
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FCTEMPS=`egrep '^FCTEMPS=.*$' $1 | sed -e 's/FCTEMPS=//g'`
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MINTEMP=`egrep '^MINTEMP=.*$' $1 | sed -e 's/MINTEMP=//g'`
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MAXTEMP=`egrep '^MAXTEMP=.*$' $1 | sed -e 's/MAXTEMP=//g'`
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MINSTART=`egrep '^MINSTART=.*$' $1 | sed -e 's/MINSTART=//g'`
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MINSTOP=`egrep '^MINSTOP=.*$' $1 | sed -e 's/MINSTOP=//g'`
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# optional settings:
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FCFANS=`egrep '^FCFANS=.*$' $1 | sed -e 's/FCFANS=//g'`
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MINPWM=`egrep '^MINPWM=.*$' $1 | sed -e 's/MINPWM=//g'`
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MAXPWM=`egrep '^MAXPWM=.*$' $1 | sed -e 's/MAXPWM=//g'`
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# Check whether all mandatory settings are set
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if [[ -z ${INTERVAL} || -z ${FCTEMPS} || -z ${MINTEMP} || -z ${MAXTEMP} || -z ${MINSTART} || -z ${MINSTOP} ]]
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then
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echo "Some mandatory settings missing, please check your config file!"
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exit 1
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fi
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if [ "$INTERVAL" -le 0 ]
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then
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echo "Error in configuration file:"
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echo "INTERVAL must be at least 1"
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exit 1
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fi
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# write settings to arrays for easier use and print them
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echo
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echo "Common settings:"
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echo " INTERVAL=$INTERVAL"
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let fcvcount=0
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for fcv in $FCTEMPS
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do
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if ! echo $fcv | egrep -q '='
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then
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echo "Error in configuration file:"
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echo "FCTEMPS value is improperly formatted"
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exit 1
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fi
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AFCPWM[$fcvcount]=`echo $fcv |cut -d'=' -f1`
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AFCTEMP[$fcvcount]=`echo $fcv |cut -d'=' -f2`
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AFCFAN[$fcvcount]=`echo $FCFANS |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
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AFCMINTEMP[$fcvcount]=`echo $MINTEMP |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
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AFCMAXTEMP[$fcvcount]=`echo $MAXTEMP |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
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AFCMINSTART[$fcvcount]=`echo $MINSTART |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
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AFCMINSTOP[$fcvcount]=`echo $MINSTOP |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
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AFCMINPWM[$fcvcount]=`echo $MINPWM |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
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[ -z "${AFCMINPWM[$fcvcount]}" ] && AFCMINPWM[$fcvcount]=0
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AFCMAXPWM[$fcvcount]=`echo $MAXPWM |sed -e 's/ /\n/g' |egrep "${AFCPWM[$fcvcount]}" |cut -d'=' -f2`
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[ -z "${AFCMAXPWM[$fcvcount]}" ] && AFCMAXPWM[$fcvcount]=255
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# verify the validity of the settings
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if [ "${AFCMINTEMP[$fcvcount]}" -ge "${AFCMAXTEMP[$fcvcount]}" ]
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then
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echo "Error in configuration file (${AFCPWM[$fcvcount]}):"
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echo "MINTEMP must be less than MAXTEMP"
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exit 1
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fi
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if [ "${AFCMAXPWM[$fcvcount]}" -gt 255 ]
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then
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echo "Error in configuration file (${AFCPWM[$fcvcount]}):"
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echo "MAXPWM must be at most 255"
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exit 1
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fi
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if [ "${AFCMINSTOP[$fcvcount]}" -ge "${AFCMAXPWM[$fcvcount]}" ]
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then
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echo "Error in configuration file (${AFCPWM[$fcvcount]}):"
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echo "MINSTOP must be less than MAXPWM"
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exit 1
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fi
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if [ "${AFCMINSTOP[$fcvcount]}" -lt "${AFCMINPWM[$fcvcount]}" ]
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then
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echo "Error in configuration file (${AFCPWM[$fcvcount]}):"
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echo "MINSTOP must be greater than or equal to MINPWM"
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exit 1
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fi
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if [ "${AFCMINPWM[$fcvcount]}" -lt 0 ]
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then
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echo "Error in configuration file (${AFCPWM[$fcvcount]}):"
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echo "MINPWM must be at least 0"
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exit 1
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fi
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echo
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echo "Settings for ${AFCPWM[$fcvcount]}:"
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echo " Depends on ${AFCTEMP[$fcvcount]}"
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echo " Controls ${AFCFAN[$fcvcount]}"
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echo " MINTEMP=${AFCMINTEMP[$fcvcount]}"
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echo " MAXTEMP=${AFCMAXTEMP[$fcvcount]}"
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echo " MINSTART=${AFCMINSTART[$fcvcount]}"
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echo " MINSTOP=${AFCMINSTOP[$fcvcount]}"
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echo " MINPWM=${AFCMINPWM[$fcvcount]}"
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echo " MAXPWM=${AFCMAXPWM[$fcvcount]}"
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let fcvcount=fcvcount+1
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done
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echo
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}
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function DevicePath()
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{
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if [ -h "$1/device" ]
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then
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readlink -f "$1/device" | sed -e 's/^\/sys\///'
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fi
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}
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function DeviceName()
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{
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if [ -r "$1/name" ]
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then
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cat "$1/name" | sed -e 's/[[:space:]=]/_/g'
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elif [ -r "$1/device/name" ]
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then
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cat "$1/device/name" | sed -e 's/[[:space:]=]/_/g'
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fi
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}
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function ValidateDevices()
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{
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local OLD_DEVPATH="$1" OLD_DEVNAME="$2" outdated=0
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local entry device name path
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for entry in $OLD_DEVPATH
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do
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device=`echo "$entry" | sed -e 's/=[^=]*$//'`
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path=`echo "$entry" | sed -e 's/^[^=]*=//'`
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if [ "`DevicePath "$device"`" != "$path" ]
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then
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echo "Device path of $device has changed"
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outdated=1
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fi
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done
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for entry in $OLD_DEVNAME
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do
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device=`echo "$entry" | sed -e 's/=[^=]*$//'`
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name=`echo "$entry" | sed -e 's/^[^=]*=//'`
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if [ "`DeviceName "$device"`" != "$name" ]
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then
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echo "Device name of $device has changed"
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outdated=1
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fi
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done
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return $outdated
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}
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# Check that all referenced sysfs files exist
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function CheckFiles {
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local outdated=0
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let fcvcount=0
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while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
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do
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pwmo=${AFCPWM[$fcvcount]}
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if [ ! -w $pwmo ]
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then
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echo "Error: file $pwmo doesn't exist"
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outdated=1
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fi
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let fcvcount=$fcvcount+1
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done
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let fcvcount=0
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while (( $fcvcount < ${#AFCTEMP[@]} )) # go through all temp inputs
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do
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tsen=${AFCTEMP[$fcvcount]}
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if [ ! -r $tsen ]
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then
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echo "Error: file $tsen doesn't exist"
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outdated=1
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fi
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let fcvcount=$fcvcount+1
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done
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let fcvcount=0
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while (( $fcvcount < ${#AFCFAN[@]} )) # go through all fan inputs
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do
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fan=${AFCFAN[$fcvcount]}
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if [ ! -r $fan ]
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then
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echo "Error: file $fan doesn't exist"
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outdated=1
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fi
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let fcvcount=$fcvcount+1
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done
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if [ $outdated -eq 1 ]
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then
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echo
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echo "At least one referenced file is missing. Either some required kernel"
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echo "modules haven't been loaded, or your configuration file is outdated."
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echo "In the latter case, you should run pwmconfig again."
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fi
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return $outdated
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}
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if [ -f "$1" ]
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then
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LoadConfig $1
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else
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LoadConfig /etc/fancontrol
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fi
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# Detect path to sensors
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if echo "${AFCPWM[0]}" | egrep -q '^/'
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then
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DIR=/
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elif echo "${AFCPWM[0]}" | egrep -q '^hwmon[0-9]'
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then
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DIR=/sys/class/hwmon
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elif echo "${AFCPWM[0]}" | egrep -q '^[1-9]*[0-9]-[0-9abcdef]{4}'
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then
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DIR=/sys/bus/i2c/devices
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else
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echo "$0: Invalid path to sensors"
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exit 1
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fi
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if [ ! -d $DIR ]
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then
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echo $0: 'No sensors found! (did you load the necessary modules?)'
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exit 1
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fi
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cd $DIR
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# Check for configuration change
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if [ -z "$DEVPATH" -o -z "$DEVNAME" ]
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then
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echo "Configuration is too old, please run pwmconfig again"
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exit 1
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fi
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if ! ValidateDevices "$DEVPATH" "$DEVNAME"
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then
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echo "Configuration appears to be outdated, please run pwmconfig again"
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exit 1
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fi
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CheckFiles || exit 1
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if [ -f "$PIDFILE" ]
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then
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echo "File $PIDFILE exists, is fancontrol already running?"
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exit 1
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fi
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echo $$ > "$PIDFILE"
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# $1 = pwm file name
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function pwmdisable()
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{
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ENABLE=${1}_enable
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# No enable file? Just set to max
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if [ ! -f $ENABLE ]
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then
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echo $MAX > $1
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return 0
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fi
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# Try pwmN_enable=0
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echo 0 > $ENABLE 2> /dev/null
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if [ `cat $ENABLE` -eq 0 ]
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then
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# Success
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return 0
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fi
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# It didn't work, try pwmN_enable=1 pwmN=255
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echo 1 > $ENABLE 2> /dev/null
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echo $MAX > $1
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if [ `cat $ENABLE` -eq 1 -a `cat $1` -ge 190 ]
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then
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# Success
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return 0
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fi
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# Nothing worked
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echo "$ENABLE stuck to" `cat $ENABLE` >&2
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return 1
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}
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# $1 = pwm file name
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function pwmenable()
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{
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ENABLE=${1}_enable
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if [ -f $ENABLE ]
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then
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echo 1 > $ENABLE 2> /dev/null
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if [ $? -ne 0 ]
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then
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return 1
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fi
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fi
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echo $MAX > $1
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}
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function restorefans()
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{
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local status=$1
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echo 'Aborting, restoring fans...'
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let fcvcount=0
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while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
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do
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pwmo=${AFCPWM[$fcvcount]}
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pwmdisable $pwmo
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let fcvcount=$fcvcount+1
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done
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echo 'Verify fans have returned to full speed'
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rm -f "$PIDFILE"
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exit $status
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}
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trap 'restorefans 0' SIGQUIT SIGTERM
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trap 'restorefans 1' SIGHUP SIGINT
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# main function
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function UpdateFanSpeeds {
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let fcvcount=0
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while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
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do
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#hopefully shorter vars will improve readability:
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pwmo=${AFCPWM[$fcvcount]}
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tsens=${AFCTEMP[$fcvcount]}
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fan=${AFCFAN[$fcvcount]}
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let mint="${AFCMINTEMP[$fcvcount]}*1000"
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let maxt="${AFCMAXTEMP[$fcvcount]}*1000"
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minsa=${AFCMINSTART[$fcvcount]}
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minso=${AFCMINSTOP[$fcvcount]}
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minpwm=${AFCMINPWM[$fcvcount]}
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maxpwm=${AFCMAXPWM[$fcvcount]}
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read tval < ${tsens}
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if [ $? -ne 0 ]
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then
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echo "Error reading temperature from $DIR/$tsens"
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restorefans 1
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fi
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read pwmpval < ${pwmo}
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if [ $? -ne 0 ]
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then
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echo "Error reading PWM value from $DIR/$pwmo"
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restorefans 1
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fi
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# If fanspeed-sensor output shall be used, do it
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if [[ -n ${fan} ]]
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then
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read fanval < ${fan}
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if [ $? -ne 0 ]
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then
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echo "Error reading Fan value from $DIR/$fan"
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restorefans 1
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fi
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else
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fanval=1 # set it to a non zero value, so the rest of the script still works
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fi
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# debug info
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if [ "$DEBUG" != "" ]
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then
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echo "pwmo=$pwmo"
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echo "tsens=$tsens"
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echo "fan=$fan"
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echo "mint=$mint"
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echo "maxt=$maxt"
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echo "minsa=$minsa"
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echo "minso=$minso"
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echo "minpwm=$minpwm"
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echo "maxpwm=$maxpwm"
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echo "tval=$tval"
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echo "pwmpval=$pwmpval"
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echo "fanval=$fanval"
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fi
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if (( $tval <= $mint ))
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then pwmval=$minpwm # below min temp, use defined min pwm
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elif (( $tval >= $maxt ))
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then pwmval=$maxpwm # over max temp, use defined max pwm
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else
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# calculate the new value from temperature and settings
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pwmval="(${tval}-${mint})*(${maxpwm}-${minso})/(${maxt}-${mint})+${minso}"
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if [ $pwmpval -eq 0 -o $fanval -eq 0 ]
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then # if fan was stopped start it using a safe value
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echo $minsa > $pwmo
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# Sleep while still handling signals
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sleep 1 &
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wait $!
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fi
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fi
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echo $pwmval > $pwmo # write new value to pwm output
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if [ $? -ne 0 ]
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then
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echo "Error writing PWM value to $DIR/$pwmo"
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restorefans 1
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fi
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if [ "$DEBUG" != "" ]
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then
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echo "new pwmval=$pwmval"
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fi
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let fcvcount=$fcvcount+1
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done
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}
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echo 'Enabling PWM on fans...'
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let fcvcount=0
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while (( $fcvcount < ${#AFCPWM[@]} )) # go through all pwm outputs
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do
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pwmo=${AFCPWM[$fcvcount]}
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pwmenable $pwmo
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if [ $? -ne 0 ]
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then
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echo "Error enabling PWM on $DIR/$pwmo"
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restorefans 1
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fi
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let fcvcount=$fcvcount+1
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done
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echo 'Starting automatic fan control...'
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# main loop calling the main function at specified intervals
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while true
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do
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UpdateFanSpeeds
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# Sleep while still handling signals
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sleep $INTERVAL &
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wait $!
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done
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