38 lines
1.1 KiB
Bash
38 lines
1.1 KiB
Bash
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#!/usr/bin/env bash
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#
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# battery-monitor.sh
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# Prints the state of charge of the tablet's battery
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#
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# Parabola-rM is a free operating system for the reMarakble tablet.
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# Copyright (C) 2020
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program.
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# Path for Linux 4.9
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battpath="/sys/class/power_supply/bq27441-0"
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chargenow="$(cat $battpath/charge_now)"
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chargefull="$(cat $battpath/charge_full)"
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status="$(cat $battpath/status)"
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chargepct="$(echo $chargenow $chargefull \
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| awk '{printf "%f", $1 / $2 * 100}' \
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| cut -d'.' -f1)"
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symbol=""
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if [[ "Charging" == "$status" ]]; then
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symbol=$'\u26a1' # Lightning symbol
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fi
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echo "${symbol}${chargepct}%"
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