Missing battery files in /proc/acpi/battery

Question

I'm trying to employ this script:
http://mindspill.net/computing/linux-no … y-warning/
to get low battery warnings. It draws info from files like
BAT_STATE="/proc/acpi/battery/BAT1/state"
BAT_INFO="/proc/acpi/battery/BAT1/info"
but folder /proc/acpi/battery/ does not exist in my system. I do have /sys/class/power_supply/BAT0/ folder, but it does not containt 'state' or 'info' files.
What should I do to make this work?
Last edited by Lockheed (2012-06-06 10:49:13)

Answer 1

Maybe I am being a bit thick, but am not well versed in scripts.
I already modified the script to use notify-send rather than zenity
#!/bin/bash
# Location of acpi files.
BAT_STATE="/proc/acpi/battery/BAT1/state"
BAT_INFO="/proc/acpi/battery/BAT1/info"
# Minutes from the in-built warning level that measures should be taken to prevent loosing data.
BAT_ALERT_TIME=15
# Log to syslog & /var/log/acpid
LOGGER="/usr/bin/logger -t ACPID"
if grep -q discharging $BAT_STATE
then
BAT_REMAIN=`awk '/remaining/ { print $3 }' $BAT_STATE` # Remaining mAh.
BAT_DISCHARGE=`awk '/rate/ { print $3 }' $BAT_STATE` # Discharge rate in mA.
BAT_WARN=`awk '/warning/ { print $4 }' $BAT_INFO` # Warning level in mAh.
BAT_LOW=`awk '/low/ { print $4 }' $BAT_INFO` # Low level in mAh.
BAT_ALERT=$(( ( ( $BAT_DISCHARGE / 60 ) * $BAT_ALERT_TIME ) )) #+ $BAT_WARN )) # Work out the charge that will have been used in $BAT_ALERT_TIME minues (and add the warning level charge as a buffer zone).
#echo "BAT_REMAIN = $BAT_REMAIN"
#echo "BAT_ALERT = $BAT_ALERT"
# These environment variables are needed so that the script can post to the current display (using the zenity command). Change mention of steph to whatever your username is.
export XAUTHORITY=/home/steph/.Xauthority
export DISPLAY=:0
if
then
# Log the fact that the (critically) low level has been reached.
$LOGGER -p daemon.warn "Battery capacity is critically low, shutting down the system."
# Pop up critical warning.
/usr/bin/notify-send "Battery critically low." "HIBERNATING ($BAT_REMAIN)" &
# zenity --warning --title "Battery Critically Low" --text "Battery capacity is critically low, shutting down the system. (remain = $BAT_REMAIN)" &
# This is probably a good place to shut down the computer to make sure all data is written to disk. It may even be too late by now, in which case shut down the computer when it reaches the in-built warning level.
dbus-send --system --print-reply --dest="org.freedesktop.UPower" /org/freedesktop/UPower org.freedesktop.UPower.Hibernate
elif
then
# Log the fact that the warning level has been reached.
$LOGGER -p daemon.warn "Battery capacity is low."
# Pop up warning.
/usr/bin/notify-send "Battery low." "(remain = $BAT_REMAIN)" &
# zenity --warning --title "Battery Low" --text "Battery capacity is low. (remain = $BAT_REMAIN)" &
elif
then
# Log this to let the system know that there's only a few minutes left of battery before it hit the warning level of the battery pack
$LOGGER -p daemon.info "Battery capacity alert."
# Pop up info.
/usr/bin/notify-send "Battery depleting." "(remain = $BAT_REMAIN)" &
# zenity --info --title "Battery Alert" --text "Battery capacity alert. (remain = $BAT_REMAIN)" &
fi
fi
However, I suppose changing it to use acpi -V would involve more in-depth modifications which I am not sure of.