package main

import (
	"errors"
	"net"
	"os"
	"syscall"
)

func main() {
	if err := run(); err != nil {
		println(err)
		os.Exit(1)
	}
}

func run() error {
	l, err := findListener()
	if err != nil {
		return err
	}
	if l == nil {
		return errors.New("no pre-opened sockets available")
	}
	defer l.Close()

	c, err := l.Accept()
	if err != nil {
		return err
	}