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#!/bin/sh
# Detect AC power or not in a portable way
# Exit 0 if on AC power, 1 if not and 255 if we don't know how to work it out
# Copyright (c) 2007-2015 The OpenRC Authors.
# See the Authors file at the top-level directory of this distribution and
# https://github.com/OpenRC/openrc/blob/master/AUTHORS
#
# This file is part of OpenRC. It is subject to the license terms in
# the LICENSE file found in the top-level directory of this
# distribution and at https://github.com/OpenRC/openrc/blob/master/LICENSE
# This file may not be copied, modified, propagated, or distributed
# except according to the terms contained in the LICENSE file.
if [ -f /proc/acpi/ac_adapter/*/state ]; then
cat /proc/acpi/ac_adapter/*/state | while read line; do
case "$line" in
"state:"*"off-line") exit 128;;
esac
done
elif [ -f /sys/class/power_supply/*/online ]; then
cat /sys/class/power_supply/*/online | while read line; do
[ "${line}" = 0 ] && exit 128
done
elif [ -f /proc/pmu/info ]; then
cat /proc/pmu/info | while read line; do
case "$line" in
"AC Power"*": 0") exit 128;;
esac
done
elif command -v envstat >/dev/null 2>&1; then
# NetBSD has envstat
envstat -d acpiacad0 2>/dev/null | while read line; do
case "$line" in
"connected:"*"OFF") exit 128;;
esac
done
elif sysctl -q hw.acpi.acline >/dev/null 2>/dev/null; then
case $(sysctl -n hw.acpi.acline) in
0) exit 1;;
*) exit 0;;
esac
else
exit 255
fi
[ $? != 128 ]
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