42 lines
1.8 KiB
Bash
Executable file
42 lines
1.8 KiB
Bash
Executable file
#!/bin/sh
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# Send a notification if the laptop battery is either low or is fully charged.
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# Set on a systemd timer (~/.config/systemd/user/battery-alert.timer).
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export DISPLAY=:0
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export DBUS_SESSION_BUS_ADDRESS="unix:path=/run/user/1000/bus"
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# Battery percentage at which to notify
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WARNING_LEVEL=20
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CRITICAL_LEVEL=5
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BATTERY_DISCHARGING=$(acpi -b | grep "Battery 0" | grep -c "Discharging")
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BATTERY_LEVEL=$(acpi -b | grep "Battery 0" | grep -P -o '[0-9]+(?=%)')
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# Use files to store whether we've shown a notification or not (to prevent multiple notifications)
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FULL_FILE=/tmp/batteryfull
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EMPTY_FILE=/tmp/batteryempty
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CRITICAL_FILE=/tmp/batterycritical
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# Reset notifications if the computer is charging/discharging
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if [ "$BATTERY_DISCHARGING" -eq 1 ] && [ -f $FULL_FILE ]; then
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rm $FULL_FILE
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elif [ "$BATTERY_DISCHARGING" -eq 0 ] && [ -f $EMPTY_FILE ]; then
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rm $EMPTY_FILE
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fi
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# If the battery is charging and is full (and has not shown notification yet)
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if [ "$BATTERY_LEVEL" -gt 99 ] && [ "$BATTERY_DISCHARGING" -eq 0 ] && [ ! -f $FULL_FILE ]; then
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notify-send "Battery Charged" "Battery is fully charged." -i "battery" -r 9991
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touch $FULL_FILE
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# If the battery is low and is not charging (and has not shown notification yet)
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elif [ "$BATTERY_LEVEL" -le $WARNING_LEVEL ] && [ "$BATTERY_DISCHARGING" -eq 1 ] && [ ! -f $EMPTY_FILE ]; then
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notify-send "Low Battery" "${BATTERY_LEVEL}% of battery remaining." -u critical -i "battery-alert" -r 9991
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touch $EMPTY_FILE
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# If the battery is critical and is not charging (and has not shown notification yet)
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elif [ "$BATTERY_LEVEL" -le $CRITICAL_LEVEL ] && [ "$BATTERY_DISCHARGING" -eq 1 ] && [ ! -f $CRITICAL_FILE ]; then
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notify-send "Battery Critical" "The computer will shutdown soon." -u critical -i "battery-alert" -r 9991
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touch $CRITICAL_FILE
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fi
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