Implement pid file path in server tmp path (issue #14)

Closes #14

cmdpolling/polling.go

@@ -7,6 +7,7 @@ import (
 	"syscall"
 	"time"
 	"encoding/json"
+	"strings"
 
 	log "github.com/Sirupsen/logrus"
 	"github.com/codegangsta/cli"
@@ -35,12 +36,17 @@ func handleSysSignals(cancelFunc context.CancelFunc) {
 	cancelFunc()
 }
 
+// Returns the full path to the tmp folder joined with pid management file name
+func getProcessIdFilePath() string{
+	return strings.Join([]string{os.TempDir(),  string(os.PathSeparator), ProcessIdFile}, "")
+}
+
 // Start the polling process
 func cmdStart(c *cli.Context) error {
 	log.Debug("cmdStart")
 
 	formatter := format.GetFormatter()
-	if err := utils.SetProcessIdToFile(ProcessIdFile); err != nil {
+	if err := utils.SetProcessIdToFile(getProcessIdFilePath()); err != nil {
 		formatter.PrintFatal("cannot create the pid file", err)
 	}
 
@@ -65,7 +71,7 @@ func cmdStop(c *cli.Context) error {
 	log.Debug("cmdStop")
 
 	formatter := format.GetFormatter()
-	if err := utils.StopProcess(ProcessIdFile); err != nil {
+	if err := utils.StopProcess(getProcessIdFilePath()); err != nil {
 		formatter.PrintFatal("cannot stop the polling process", err)
 	}