read configuration file

vendor/github.com/pyke369/golang-support/fqdn/fqdn.go

@@ -0,0 +1,28 @@
+package fqdn
+
+import (
+	"net"
+	"os"
+	"strings"
+)
+
+func FQDN() (string, string) {
+	if hostname, err := os.Hostname(); err == nil {
+		if addresses, err := net.LookupHost(hostname); err != nil {
+			return hostname, "*"
+		} else {
+			for _, address := range addresses {
+				if hostnames, err := net.LookupAddr(address); err == nil && len(hostnames) > 0 {
+					for _, hostname := range hostnames {
+						if strings.Count(hostname, ".") > 1 {
+							hostname = strings.TrimSuffix(hostname, ".")
+							addresses, _ = net.LookupHost(hostname)
+							return hostname, addresses[0]
+						}
+					}
+				}
+			}
+		}
+	}
+	return "unknown", "*"
+}