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Flicker-free battery monitor for OpenBSD
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#!/bin/sh | |
# Flicker-free battery monitor for OpenBSD. Requires Python 3 | |
# One could somewhat easily rewrite the Python part in Perl if they want to use base exclusively. | |
BATT=acpibat0 | |
while true; do | |
RATE="$(sysctl -n hw.sensors.$BATT.power0)" | |
RATE="${RATE%" ("*}" | |
REMAINING="$(sysctl -n hw.sensors.$BATT.watthour3)" | |
REMAINING="${REMAINING%" ("*}" | |
LASTFULL="$(sysctl -n hw.sensors.$BATT.watthour0)" | |
LASTFULL="${LASTFULL%" ("*}" | |
DATE=$(date) | |
# Don't like this python3 call? Replace the 5 lines after this comment with: | |
# TIMELEFT=$(echo "scale=2;${REMAINING%" "*}/${RATE%" "*}" | bc) | |
TIMELEFT=$(python3 -c "rate='$RATE';remaining='$REMAINING';rate=float(rate.split()[0]);remaining=float(remaining.split()[0]);hr=(remaining/rate); print('{}:{:02}'.format(int(hr),int(hr*60)%60))" 2>/dev/null) | |
if [[ "x$TIMELEFT" == "x" ]]; then | |
# ZeroDivisionError | |
TIMELEFT="N/A" | |
else | |
H=$(echo $TIMELEFT | cut -d: -f1) # hours | |
M=$(echo $TIMELEFT | cut -d: -f2 | cut -c1) # highest digit of minutes | |
# should match 0:00 through 0:19 | |
if [[ $H == 0 && ( $M == 1 || $M == 0 ) ]]; then | |
echo -en '\a' | |
fi | |
fi | |
print "\033[H\033[2J$DATE\nTIME LEFT: $TIMELEFT\n---\nRate: $RATE\nRemaining: $REMAINING\nLast full: $LASTFULL" | |
sleep 5 | |
done |
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