55 lines
1.4 KiB
Bash
Executable File
55 lines
1.4 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
POLLING_FREQUENCY=1
|
|
|
|
# ISO 8601
|
|
alias date="date '+%Y-%m-%dT%T'"
|
|
|
|
emit() {
|
|
printf "[%s] " "$(date)"
|
|
echo "$@"
|
|
}
|
|
get_current_level() {
|
|
# adapted from other script i wrote, also in the public domain
|
|
if [ "$(uname)" = "Linux" ]; then
|
|
# this is a dirty hack.
|
|
# acpi | awk '{print $4}' will print the battery percentage,
|
|
# and s/,$// strips the trailing comma.
|
|
# acpi -a will just print the power adapter status.
|
|
printf "%b" "$(acpi | awk '{print $4}' | sed 's/,$//')"
|
|
return 0
|
|
elif [ "$(uname)" = "NetBSD" ]; then
|
|
printf "%b" "$(envstat -s acpibat0:charge \
|
|
| sed 1,2d \
|
|
| cut -d ':' -f 2 \
|
|
| awk '{print $1}' \
|
|
| cut -d '.' -f 1)"
|
|
return 0
|
|
else
|
|
printf "get_battery_status: unsupported OS" >>/dev/stderr
|
|
return 1
|
|
fi
|
|
}
|
|
|
|
! get_current_level >/dev/null \
|
|
&& printf "Unable to get battery status on this system.\n" >>/dev/stderr \
|
|
&& exit 1 \
|
|
|| true
|
|
|
|
current_level=$(get_current_level)
|
|
previous_level=$current_level
|
|
|
|
emit "$(printf "Current level: %d%%" "$current_level")"
|
|
|
|
while true; do
|
|
current_level=$(get_current_level)
|
|
if ! [ $current_level -eq $previous_level ]; then
|
|
[ $current_level -lt $previous_level ] \
|
|
&& emit "$(printf "Discharged: %d%% -> %d%%\n" $previous_level $current_level )" \
|
|
|| emit "$(printf " Charged: %d%% -> %d%%\n" $previous_level $current_level )"
|
|
previous_level=$current_level
|
|
fi
|
|
|
|
sleep $POLLING_FREQUENCY
|
|
done
|