Linux uninstall and init script.

installer/linux/init.d/zerotier-one

@@ -17,99 +17,81 @@
 #              networks. See https://www.zerotier.com/ for more information.
 ### END INIT INFO
 
-RETVAL=0
-prog="zerotier-one"
-exec="/var/lib/zerotier-one/zerotier-one"
-lockfile="/var/lock/subsys/zerotier-one"
-pidfile="/var/lib/zerotier-one/zerotier-one.pid"
+#
+# 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.
+#
 
-# Source function library.
-. /etc/rc.d/init.d/functions
+zthome=/var/lib/zerotier-one
 
-start() {
-	if [ $UID -ne 0 ] ; then
-		echo "User has insufficient privilege."
-		exit 4
-	fi
-	[ -x $exec ] || exit 5
-	echo -n $"Starting $prog: "
-	daemon $exec
-	retval=$?
-	echo
-	[ $retval -eq 0 ] && touch $lockfile
-}
+# 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
 
-stop() {
-	if [ $UID -ne 0 ] ; then
-		echo "User has insufficient privilege."
-		exit 4
-	fi
-	echo -n $"Stopping $prog: "
-	pid=0
-	if [ -f "$pidfile" ]; then
-		pid=`cat $pidfile`
-	fi
-	if [ "$pid" -gt 0 ]; then
-		kill -TERM $pid
-		RETVAL=3
+if [ "$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
-		failure $"Stopping $prog"
+		rm -f "$zthome/zerotier-one.pid"
 	fi
-	retval=$?
-	echo
-	[ $retval -eq 0 ] && rm -f $lockfile
-}
-
-restart() {
-	stop
-	start
-}
-
-reload() {
-	stop
-	start
-}
-
-force_reload() {
-	restart
-}
-
-rh_status() {
-	status -p $pidfile $prog
-}
-
-rh_status_q() {
-	rh_status >/dev/null 2>&1
-}
+fi
 
 case "$1" in
 	start)
-		rh_status_q && exit 0
-		$1
+		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)
-		rh_status_q || exit 0
-		$1
+		if [ $running -gt 0 ]; then
+			echo "Stopping ZeroTier One..."
+			kill -TERM $pid
+		else
+			echo "ZeroTier One is not running."
+		fi
 		;;
-	restart)
-		$1
-		;;
-	reload)
-		rh_status_q || exit 7
-		$1
-		;;
-	force-reload)
-		force_reload
+	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)
-		rh_status
-		;;
-	condrestart|try-restart)
-		rh_status_q || exit 0
-		restart
+		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 $?
+
+exit 0