go hot update (1)

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package mainimport ("net""reflect""fmt""os")func main() {listener, _ := net.Listen("tcp", ":8000")for {c , _ := listener.Accept()go connHandler(c)}}func connHandler(c net.Conn) {defer c.Close()e := reflect.TypeOf(c).Elem()n := e.NumField()for i := 0 ; i < n; i++ {fmt.Fprintf(os.Stdout, "e.Field(%d) = %v           %v\n", i, e.Field(i).Name, e.Field(i))}fmt.Fprintf(os.Stdout, "====================\n")v := reflect.ValueOf(c)fmt.Fprintf(os.Stdout, "reflect.ValueOf(c) %v\n", v)v = v.Elem()fmt.Fprintf(os.Stdout, "reflect.ValueOf(c).Elem() %v\n", v)fmt.Fprintf(os.Stdout, "====================\n")for i := 0; i < v.NumField(); i++ {fmt.Fprintf(os.Stdout, "v.Field(%d) = %v   %v\n", i, v.Field(i), v.Field(i).Type())switch v.Field(i).Type().Kind(){case reflect.Int:fmt.Fprintf(os.Stdout, "%d\n", v.Field(i).Int())}}fmt.Fprintf(os.Stdout, "====================\n")fmt.Fprintf(os.Stdout, "reflect.ValueOf(c).Elem().FieldByName(\"fd\") %v\n", v.FieldByName("fd"))fmt.Fprintf(os.Stdout, "reflect.ValueOf(c).Elem().FieldByName(\"fd\").Elem() %v\n", reflect.ValueOf(c).Elem().FieldByName("fd").Elem())v = reflect.ValueOf(c).Elem().FieldByName("fd").Elem()fmt.Fprintf(os.Stdout, "====================\n")for i := 0; i < v.NumField(); i++ {fmt.Fprintf(os.Stdout, "v.Field(%d) = %v   %v  %s\n", i, v.Field(i), v.Field(i).Type(), v.Field(i).String())switch v.Field(i).Type().Kind(){case reflect.Int:fmt.Fprintf(os.Stdout, "%d\n", v.Field(i).Int())}}fmt.Fprintf(os.Stdout, "====================\n")sysfd := v.FieldByName("sysfd")fmt.Fprintf(os.Stdout, "v.FieldByName(\"sysfd\") = %v\n", sysfd)fd := uintptr(sysfd.Int())fmt.Fprintf(os.Stdout, "fd %v\n", fd)f := os.NewFile(fd, "listen socket")fmt.Fprintf(os.Stdout, "f = %v\n", f)conn, err := net.FileConn(f)if err != nil {fmt.Fprintf(os.Stdout, "err %v\n", err.Error())return}fmt.Fprintf(os.Stdout, "c %v\n", conn)conn.Write([]byte("hello world ~!\n"))}

[vicky@localhost ~]$ telnet 192.168.1.98 8000
Trying 192.168.1.98...
Connected to 192.168.1.98.
Escape character is '^]'.
hello world ~!

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