eee-fan/eee-fan-ctrl.sh

   1 #!/bin/sh
   2 # A script to control the fan in the eeepc
   3 ## yet another dubious Dougal script for Puppy Linux, October 2008
   4 ## Licenced under GPL v2 or later
   5 ## No BASHisms I'm aware of...
   6 # Update Nov. 2nd: add clean exiting (trap SIGTERM) and VERBOSE_LOGGING
   7
   8 SCRIPT_NAME=$(basename $0)
   9 CONFIG_FILE="/etc/eee-fan.conf"
  10 LOG_FILE="/var/log/eee-fan.log"
  11
  12 # Make sure the eee module is loaded
  13 if [ ! -d /proc/eee ] ; then
  14   if grep -Fq 'eee ' /proc/modules ; then
  15     echo "$SCRIPT_NAME: Error: /proc/eee doesn't exist" >&2
  16     exit
  17   elif modprobe eee ; then
  18     # sleep a little, just in case (I don't have an eee, so don't know...)
  19     sleep 5
  20     if [ ! -d /proc/eee ] ; then
  21       echo "$SCRIPT_NAME: Error: /proc/eee doesn't exist" >&2
  22       exit
  23     fi
  24   else
  25     echo "$SCRIPT_NAME: Error: failed to load module eee.ko" >&2
  26     exit
  27   fi
  28 fi
  29
  30 # a function to set fan to auto and exit
  31 exit_script(){
  32   echo 40 > /proc/eee/fan_speed
  33   echo 0 > /proc/eee/fan_manual
  34   $ENABLE_LOGGING && echo "$(date +'%b %d %T ') Set mode to auto ; Exiting" >>$LOG_FILE
  35   [ "$1" ] && echo "$SCRIPT_NAME: Error: $@" >&2
  36   exit
  37 }
  38
  39 # a function to read config file and make sure we have everything (or set to default)
  40 read_config(){
  41   . $CONFIG_FILE || exit_script "failed to read configuration file. Exiting."
  42   [ "$CONTROL_FAN" = "true" ] || exit_script
  43   [ -z "$CONTROL_FAN" -o -z "$SLEEP_TIME" -o -z "$HIGH_TEMP" -o -z "$LOW_TEMP" -o -z "$FAN_SPEED" ] && exit_script "wrong values in configuration file. Exiting."
  44   # make sure max temp is reasonable and higher than low temp...
  45   [ $HIGH_TEMP -le $MAX_TEMP -a $HIGH_TEMP -gt $LOW_TEMP ] || exit_script "bad HIGH_TEMP value. Exiting."
  46   # make sure low temp is reasonable...
  47   [ $LOW_TEMP -ge $MIN_TEMP ] || exit_script "MIN_TEMP is too low. Exiting."
  48   # make sure speed is between 0-100
  49   [ $FAN_SPEED -ge 0 -a $FAN_SPEED -le 100 ] || exit_script "bad FAN_SPEED. Exiting"
  50   [ $SLEEP_TIME -gt 0 ] || exit_script "bad SLEEP_TIME value. Exiting"
  51 }
  52
  53 # Trap sighup, so we can re-read the configuration without having to terminate
  54 trap "read_config" HUP
  55 trap "exit_script" SIGTERM
  56
  57 # Source config file (also exits if needed)
  58 read_config
  59
  60 # Move old config file
  61 $ENABLE_LOGGING && mv $LOG_FILE $LOG_FILE.old 2>/dev/null
  62
  63 # Change to manual control
  64 echo 1 > /proc/eee/fan_manual
  65 $ENABLE_LOGGING && echo "$(date +'%b %d %T ') Starting ; Set fan to manual" >>$LOG_FILE
  66
  67 # Keep track of the state we're in, so we don't keep checking the fan speed
  68 STATE="off"
  69 # start with off
  70 echo 0 > /proc/eee/fan_speed
  71
  72 # Start the loop
  73 while true ; do
  74   #TEMP=$(cat /proc/eee/temperature)
  75   read TEMP < /proc/eee/temperature
  76   [ -z "$TEMP" ] && exit_script "no temperature value found. Exiting"
  77   if [ $TEMP -ge $HIGH_TEMP ] && [ "$STATE" = "off" ] ; then
  78     echo "$FAN_SPEED" > /proc/eee/fan_speed
  79     STATE="on"
  80     $ENABLE_LOGGING && echo "$(date +'%b %d %T ') Temperature ${TEMP}C ; Set fan speed to $FAN_SPEED" >>$LOG_FILE
  81   elif [ $TEMP -lt $LOW_TEMP ] && [ "$STATE" = "on" ] ; then
  82     echo 0 > /proc/eee/fan_speed
  83     STATE="off"
  84     $ENABLE_LOGGING && echo "$(date +'%b %d %T ') Temperature ${TEMP}C ; Set fan speed to 0" >>$LOG_FILE
  85   fi
  86   $VERBOSE_LOGGING && echo "$(date +'%b %d %T ') Temperature: ${TEMP}C" >>$LOG_FILE
  87   sleep $SLEEP_TIME
  88 done
  89