acpid.battery.sh

   1 #!/bin/sh
   2 # /etc/acpid/actions/battery.sh
   3 # based on work by Frank Dietrich <ablesoft@gmx.de>
   4 # £ukasz Pawelczyk <havner@pld-linux.org>
   5 #
   6 # Handle power related events and take appropriate actions.
   7
   8 if [ $# != 1 ]; then
   9         exit 1
  10 fi
  11 set $*
  12
  13 AC=/proc/acpi/ac_adapter/ADP1
  14 BAT=/proc/acpi/battery/BAT1
  15 STATE_FILE=/tmp/ac_bat_acpid.state
  16
  17 # get the AC connector state (plugged/unplugged) from /proc filesystem.
  18 AC_STATE=`sed -n 's/^.*\(off\|on\)-line.*/\1/p' $AC/state`
  19 AC_STATE_OLD=`cat "$STATE_FILE" | awk '{print $1};'`
  20 # get the battery state from /proc filesystem
  21 BAT_CAPACITY=`awk '/^remaining\ capacity:/ {print $3}' $BAT/state`
  22 BAT_WARNING=`awk '/^alarm:/ {print $2}' $BAT/alarm`
  23 BAT_CRITICAL=`awk '/^design\ capacity\ low:/ {print $4}' $BAT/info`
  24 BAT_STATE_OLD=`cat "$STATE_FILE" | awk '{print $2};'`
  25 if [ "$BAT_CAPACITY" -le "$((BAT_CRITICAL+200))" -a "$AC_STATE" = "off" ]; then
  26         BAT_STATE=critical
  27 elif [ "$BAT_CAPACITY" -le "$((BAT_WARNING+200))" -a "$AC_STATE" = "off" ]; then
  28         BAT_STATE=warning
  29 else
  30         BAT_STATE=normal
  31 fi
  32 echo "$AC_STATE $BAT_STATE" >  "$STATE_FILE"
  33
  34 if [ "$AC_STATE" != "$AC_STATE_OLD" ]; then
  35  case "$AC_STATE" in
  36   on)
  37         # AC connector plugged in
  38         logger "acpid: `basename $AC` connector plugged in. State: $AC_STATE."
  39         # deactivate standby (spindown) timeout for the drive
  40         #hdparm -q -S 0 /dev/hda
  41         # handle processor
  42         #echo 0 > /proc/acpi/processor/CPU0/throttling
  43         #echo 0 > /proc/acpi/processor/CPU0/performance
  44         ;;
  45   off)
  46         # AC connector unplugged
  47         logger "acpid: `basename $AC` connector unplugged. State: $AC_STATE."
  48         # activate standby (spindown) timeout for the drive
  49         # timeout 5 minutes (man hdparm, for more informations)
  50         #hdparm -q -S 60 /dev/sda
  51         # handle processor
  52         #echo 4 > /proc/acpi/processor/CPU0/throttling
  53         #echo 3 > /proc/acpi/processor/CPU0/performance
  54         ;;
  55   *)
  56         # AC connector in undetermined state
  57         logger "acpid: Could not determine new `basename $AC` connector state: $AC_STATE."
  58         ;;
  59  esac
  60 fi
  61
  62 if [ "$BAT_STATE" != "$BAT_STATE_OLD" ]; then
  63  case "$BAT_STATE" in
  64   warning)
  65         # battery passed acpi alarm state and AC unplugged
  66         logger "acpid: Remaining `basename $BAT` battery capacity low. State: $BAT_STATE."
  67         # play alarm sound
  68         #play /path_to/alarm.wav
  69         # put computer to sleep
  70         #echo mem > /sys/power/state
  71         #hibernate
  72         ;;
  73   critical)
  74         # some laptops generate acpi event when machine is about to turn off
  75         logger "acpid: Remaining `basename $BAT` battery capacity VERY low. State: $BAT_STATE."
  76         # play alarm sound
  77         #play /path_to/alarm.wav
  78         # put computer to sleep
  79         #echo mem > /sys/power/state
  80         #hibernate
  81         ;;
  82   normal)
  83         # either battery is charged or AC plugged
  84         ;;
  85   *)
  86         # battery in undetermined state
  87         logger "acpid: Could not determine `basename $BAT` battery state: $BAT_STATE."
  88         ;;
  89  esac
  90 fi