#!/bin/sh
#
# zerotier-one   Virtual distributed Ethernet service
#
# chkconfig: 2345 11 89
# description: ZeroTier One provides public and private distributed ethernet \
#              networks. See https://www.zerotier.com/ for more information.

### BEGIN INIT INFO
# Provides: zerotier-one
# Required-Start: $local_fs $network
# Required-Stop: $local_fs
# Default-Start:  2345
# Default-Stop: 90
# Short-Description: start ZeroTier One
# Description: ZeroTier One provides public and private distributed ethernet \
#              networks. See https://www.zerotier.com/ for more information.
### END INIT INFO

#
# This script is written to avoid distro-specific dependencies, so it does not
# use the rc bash script libraries found on some systems. It should work on
# just about anything, even systems using Upstart. Upstart native support may
# come in the future.
#

zthome=/var/lib/zerotier-one

# Add $zthome to path so we can invoke zerotier-one naked, makes it look
# better in a ps listing.
export PATH=/bin:/usr/bin:/sbin:/usr/sbin:$zthome

if [ "$UID" -ne 0 ]; then
	echo "Init script must be called as root."
	exit 4
fi

if [ ! -f "$zthome/zerotier-one" ]; then
	echo "ZeroTier One is not installed in $zthome."
	exit 5
fi

pid=0
if [ -f "$zthome/zerotier-one.pid" ]; then
	pid=`cat $zthome/zerotier-one.pid`
fi

running=0
if [ "$pid" -gt 0 ]; then
	if [ "`readlink -nf /proc/$pid/exe`" = "$zthome/zerotier-one" ]; then
		running=1
	else
		rm -f "$zthome/zerotier-one.pid"
	fi
fi

case "$1" in
	start)
		if [ $running -eq 0 ]; then
			echo "ZeroTier One already running."
			exit 0
		fi
		echo "Starting ZeroTier One..."
		nohup zerotier-one >>/dev/null 2>&1 &
		disown %1
		exit 0
		;;
	stop)
		if [ $running -gt 0 ]; then
			echo "Stopping ZeroTier One..."
			kill -TERM $pid
		else
			echo "ZeroTier One is not running."
		fi
		;;
	restart|reload|force-reload|condrestart|try-restart)
		echo "Restarting ZeroTier One..."
		if [ $running -gt 0 ]; then
			kill -TERM $pid
		fi
		while [ -f "$zthome/zerotier-one.pid" ]; do sleep 1; done
		nohup zerotier-one >>/dev/null 2>&1 &
		disown %1
		;;
	status)
		if [ $running -gt 0 ]; then
			exit 0
		else
			exit 3
		fi
		;;
	*)
		echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload}"
		exit 2
esac

exit 0