mirror of
https://github.com/ItsDrike/dotfiles.git
synced 2025-02-23 11:59:03 +00:00
83 lines
2.1 KiB
Bash
Executable file
83 lines
2.1 KiB
Bash
Executable file
#!/usr/bin/env bash
|
|
set -euo pipefail
|
|
|
|
# This is a script which can be kept running as a cronjob or systemd timer to
|
|
# notify the user when the battery is low.
|
|
|
|
# $BATTERY env var can be set manually, being the path of the device
|
|
# (in /sys/class/power_supply/) i.e. BATTERY=/sys/class/power_supply/BAT0.
|
|
#
|
|
# If left unset, the script will automatically pick the battery device
|
|
# with the most recent change time. (This provides some limited support
|
|
# for systems with multiple batteries.)
|
|
#
|
|
# If the battery reaches below $NOTIFY_THRESHOLD (defaults to 5%),
|
|
# a notification will be shown. Note that only a single notification
|
|
# will be shown per charge cycle.
|
|
|
|
NOTIFY_THRESHOLD="${NOTIFY_THRESHOLD:-5}"
|
|
|
|
if [ -z "${BATTERY:-}" ]; then
|
|
BATTERY="$(find /sys/class/power_supply -maxdepth 1 -name 'BAT*' -exec stat -c '%Y %n' {} + | sort -k1,1nr | head -n 1 | cut -d' ' -f2-)"
|
|
fi
|
|
|
|
NOTIFY_LOCK_FILE=/tmp/battery-notif
|
|
|
|
get_bat_info() {
|
|
cat "$BATTERY"/"$1"
|
|
}
|
|
|
|
capacity="$(get_bat_info capacity)"
|
|
status="$(get_bat_info status)"
|
|
|
|
reset_notify() {
|
|
if [ -f "$NOTIFY_LOCK_FILE" ]; then
|
|
echo "Resetting notification flag"
|
|
rm -f "$NOTIFY_LOCK_FILE"
|
|
fi
|
|
}
|
|
|
|
maybe_notify() {
|
|
if [ -f "$NOTIFY_LOCK_FILE" ]; then
|
|
exit 0
|
|
fi
|
|
|
|
echo "Sending notification"
|
|
notify-send \
|
|
-a battery-notification \
|
|
-u critical \
|
|
-i "$(pick_battery_icon)" \
|
|
"Battery low" "Battery is below $NOTIFY_THRESHOLD%"
|
|
touch "$NOTIFY_LOCK_FILE"
|
|
}
|
|
|
|
pick_battery_icon() {
|
|
local icon_candidate
|
|
local data_dirs="${XDG_DATA_DIRS:-/usr/local/share:/usr/share}" # fallback
|
|
local IFS=':'
|
|
|
|
for icon_candidate in battery-caution battery-low battery; do
|
|
for dir in $data_dirs; do
|
|
if find "$dir/icons" -type f -iname "${icon_candidate}.*" 2>/dev/null | grep -q .; then
|
|
echo "$icon_candidate"
|
|
return 0
|
|
fi
|
|
done
|
|
done
|
|
|
|
echo ""
|
|
}
|
|
|
|
# The battery is not discharging (i.e. charging or full),
|
|
# we don't need to notify the user.
|
|
if [ "$status" != "Discharging" ]; then
|
|
reset_notify
|
|
exit 0
|
|
fi
|
|
|
|
if [ "$capacity" -gt "$NOTIFY_THRESHOLD" ]; then
|
|
reset_notify
|
|
exit 0
|
|
fi
|
|
|
|
maybe_notify
|