package main

import(
        "fmt"
        "log"
        "golang.org/x/crypto/ssh/terminal"
        "bufio"
        "os"
        "bytes"
)
func main() {
        reader := bufio.NewReader(os.Stdin)
        var buffer bytes.Buffer
        oldState, err := terminal.MakeRaw(0)
        if err != nil {
                log.Fatal(err)
        }

        defer terminal.Restore(0, oldState)
        num_chars := 0

        for true {
                char, _, err := reader.ReadRune();
                if char == 13 {
                        fmt.Println("You typed ", num_chars, " characters")
                        return
                }
                num_chars++
                if err != nil {
                        log.Fatal(err)
                }
                buffer.WriteRune(char)
                fmt.Println(buffer.String())
        }
        if err != nil {
                fmt.Println(err)
        }
}
~