:~# cat /sys/class/power_supply/BAT1/present
1

:~# beard -v -p /run/beard.pid -s /sys/class/power_supply/BAT1 -H pm-hibernate -t 30 -P 30
OPT[2] v
OPT[4] p /run/beard.pid
OPT[6] s /sys/class/power_supply/BAT1
OPT[8] H pm-hibernate
OPT[10] t 30
OPT[12] P 30
Waiting for battery presence

Also, the init scripts in the apline linux package, which you have kindly submitter, could do with an update.

:~# cat /etc/init.d/beard

!/usr/bin/openrc-run

Author: Andrew Hills [email protected]

Public Domain (see http://unlicense.org)

command=/usr/sbin/beard
pidfile=/var/run/beard.pid
command_args=
command_background=yes
name="Bear Hibernation Daemon"
description="beard hibernates when the battery is critically low on energy"

thanks for the !