Example of printing barcodes on USB printer "Zebra" https://www.zebra.com/ru/ru.html

zebra.go

package main

import (
	"flag"
	"fmt"
	"io/ioutil"
	"os"
	"os/exec"
)

var (
	host    = flag.String("h", "", "name of host where printer is hosted")
	printer = flag.String("p", "ZEBRA", "name of shared printer zebra")
)

const (
	zplCommand = `^XA
^FO 20,20
^BY3
^BCN,100,Y,N,N
^FD192837465^FS
^XZ`
)

func init() {
	flag.Parse()
}

func main() {
	tmpFile, err := ioutil.TempFile("", "zebra")
	if err != nil {
		panic(err)
	}

	defer func() {
		removeErr := os.Remove(tmpFile.Name())
		if removeErr != nil {
			fmt.Println("Remove temp file error: ", removeErr)
		}
	}()

	_, err = tmpFile.Write([]byte(zplCommand))
	if err != nil {
		panic(err)
	}

	err = tmpFile.Close()
	if err != nil {
		panic(err)
	}

	if host == nil || *host == "" {
		hostName, err := os.Hostname()
		if err != nil {
			panic(err)
		}

		host = &hostName
	}

	sharedPrinterName := fmt.Sprintf("\\\\%s\\%s", *host, *printer)
	cmd := exec.Command("cmd", "/C", "copy", tmpFile.Name(), sharedPrinterName)
	err = cmd.Run()
	if err != nil {
		panic(err)
	}

	fmt.Println("Printed!")
}