Fix autostart because pid already exists even though program is not running

sparkleshare

@@ -1,20 +1,28 @@
 #!/bin/bash
 
+pidfile=/tmp/sparkleshare/sparkleshare.pid
+
 # Create a directory to save the pid to
-mkdir -p /tmp/sparkleshare/
-
 if [[ "$1" == "start" ]]; then
-	if [ -e "/tmp/sparkleshare/sparkleshare.pid" ]; then
-		echo "SparkleShare is already running."
-	else
-		echo -n "Starting SparkleShare..."
-
-		# Start SparkleShare in the background and save the pid
-		mono /usr/local/share/sparkleshare/SparkleShare.exe $2 &
-		PID=$!
-		echo $PID > /tmp/sparkleshare/sparkleshare.pid
-		echo " Done."
+	if [ -e "${pidfile}" ]; then
+		sparklepid=`cat ${pidfile}`
+		if [ -n "`ps -p ${sparklepid} | grep ${sparklepid}`" ]
+		then
+			echo "SparkleShare is already running"
+			exit 0
+		else
+			echo "SparkleShare stale pid file found, starting a new instance"
+			rm -f $pidfile
+		fi
 	fi
+
+	echo -n "Starting SparkleShare..."
+	mkdir -p /tmp/sparkleshare/
+	# Start SparkleShare in the background and save the pid
+	mono /usr/local/share/sparkleshare/SparkleShare.exe $2 &
+	PID=$!
+	echo $PID > /tmp/sparkleshare/sparkleshare.pid
+	echo " Done."
 fi
 
 if [[ "$1" == "stop" ]]; then