38 lines
683 B
Go
38 lines
683 B
Go
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"net"
|
||
|
|
"os"
|
||
|
|
"strings"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Get Fully Qualified Domain Name
|
||
|
|
// returns "unknown" or hostanme in case of error
|
||
|
|
func FqdnGet() string {
|
||
|
|
hostname, err := os.Hostname()
|
||
|
|
if err != nil {
|
||
|
|
return "unknown"
|
||
|
|
}
|
||
|
|
|
||
|
|
addrs, err := net.LookupIP(hostname)
|
||
|
|
if err != nil {
|
||
|
|
return hostname
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, addr := range addrs {
|
||
|
|
if ipv4 := addr.To4(); ipv4 != nil {
|
||
|
|
ip, err := ipv4.MarshalText()
|
||
|
|
if err != nil {
|
||
|
|
return hostname
|
||
|
|
}
|
||
|
|
hosts, err := net.LookupAddr(string(ip))
|
||
|
|
if err != nil || len(hosts) == 0 {
|
||
|
|
return hostname
|
||
|
|
}
|
||
|
|
fqdn := hosts[0]
|
||
|
|
return strings.TrimSuffix(fqdn, ".") // return fqdn without trailing dot
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return hostname
|
||
|
|
}
|