#! /bin/sh
### BEGIN INIT INFO
# Provides:		gpio-manager
# Required-Start:	$remote_fs $syslog
# Required-Stop:	$remote_fs $syslog
# Default-Start:	2 3 4 5
# Default-Stop:		1
# Short-Description:	Centralized GPIO manager daemon
### END INIT INFO
#
# -*- coding: utf-8 -*-
# Debian init.d script for gpio-manager
# Copyright (c) 2024 Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

# set -e

# Source function library.
. /etc/init.d/functions

DAEMON=/usr/bin/gpio-manager
NAME=gpio-manager
PIDFILE=/var/run/gpio-manager/pid
DESC="GPIO manager daemon"

test -x $DAEMON || exit 0
test "$ENABLED" != "0" || exit 0

do_start()
{
	mkdir -p "`dirname $PIDFILE`"
	if [ -e $PIDFILE ]; then
		PIDDIR=/proc/$(cat $PIDFILE)
		if [ -d ${PIDDIR} -a "$(readlink -f ${PIDDIR}/exe)" = "${DAEMON}" ]; then
			echo "$DESC already started; not starting."
		else
			echo "Removing stale PID file $PIDFILE."
			rm -f $PIDFILE
		fi
	fi

	echo -n "Starting $DESC: "
	start-stop-daemon --user gpio-manager --background --start --quiet --make-pidfile --pidfile $PIDFILE --exec $DAEMON
	echo "$NAME."
}

do_stop()
{
	echo -n "Stopping $DESC: "
	start-stop-daemon --stop --quiet --pidfile $PIDFILE
	echo "$NAME."
	rm -f $PIDFILE
}

case "$1" in
	start)
		do_start
	;;
	stop)
		do_stop
	;;
	status)
		status $DAEMON
		exit $?
	;;
	restart)
		do_stop
		sleep 1
		do_start
	;;
	*)
		echo "Usage: /etc/init.d/$NAME {start|stop|status|restart}" >&2
		exit 1
	;;
esac

exit 0