wait.go

package main

import (
	"os"
	"time"

    "github.com/vishvananda/netlink"
)


func WaitForLink(ch <-chan netlink.LinkUpdate, ifaceName string) bool {
	for {
		timeout := time.After(time.Minute)
		select {
		case update := <-ch:
			if ifaceName == update.Link.Attrs().Name {
				return true
			}
		case <-timeout:
			return false
		}
	}
}

func main() {

	ch := make(chan netlink.LinkUpdate)
	done := make(chan struct{})
	defer close(done)
	if err := netlink.LinkSubscribe(ch, done); err != nil {
		os.Exit(2)
	}

	if !WaitForLink(ch, "dummy2") {
        os.Exit(3)
	}

}