aredn/files/usr/local/bin/poe_passthrough

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#!/bin/sh
<<'LICENSE'
Part of AREDN -- Used for creating Amateur Radio Emergency Data Networks
Copyright (C) 2018 Darryl Quinn
See Contributors file for additional contributors
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation version 3 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
Additional Terms:
Additional use restrictions exist on the AREDN(TM) trademark and logo.
See AREDNLicense.txt for more info.
Attributions to the AREDN Project must be retained in the source code.
If importing this code into a new or existing project attribution
to the AREDN project must be added to the source code.
You must not misrepresent the origin of the material contained within.
Modified versions must be modified to attribute to the original source
and be marked in reasonable ways as differentiate it from the original
version.
LICENSE
export newval=$1
if [ -z "${newval}" ]; then
echo "Syntax: $0 1 - turns POE on"
echo " $0 0 - turns POE off"
exit 2
fi
pinnum=$(jsonfilter -e '@.gpioswitch.poe_passthrough.pin' < /etc/board.json)
if [ "${pinnum}" = "" ]; then
pinnum=$(jsonfilter -e '@.gpioswitch.poe_passtrough.pin' < /etc/board.json)
fi
if [ "${pinnum}" != "" ]; then
pin="/sys/class/gpio/gpio${pinnum}"
if [ ! -d "${pin}" ]; then
echo "${pinnum}" > /sys/class/gpio/export
fi
else
pin=$(echo /sys/class/gpio/enable-poe:*)
if [ "${pin}" = "/sys/class/gpio/enable-poe:*" ]; then
echo "There are NO PoE Passthrough ports defined for this device"
exit 1
fi
fi
active_low=$(cat ${pin}/active_low 2> /dev/null)
if [ "${active_low}" = "1" ]; then
newval=$((1 - ${newval}))
fi
if [ -e "${pin}/direction" ]; then
echo "out" > ${pin}/direction
fi
echo "${newval}" > ${pin}/value
exit 0