func main(){
watcher, err := fsnotify.NewWatcher()
if err != nil {
    log.Fatal(err)
}

done := make(chan bool)

// Process events
go func() {
    for {
        select {
        case ev := <-watcher.Event:
            if ev.IsCreate() == true {
                time.Sleep(100 * time.Millisecond)
                 file,err := os.OpenFile(path+ev.Name,os.O_RDWR|os.O_EXCL,0755)
                 if err !=nil{
                   panic(err)
                 }
                 //some code
                 file.Close()
            }
        case err := <-watcher.Error:
            log.Println("error:", err)
        }
    }
}()

err = watcher.Watch("test")
if err != nil {
    log.Fatal(err)
}

<-done

watcher.Close()
}