+# get the fully qualified domain name of a host
+# same logic as hostname(1): The FQDN is the name getaddrinfo(3) returns,
+# given a nodename as a parameter
+sub get_fqdn {
+ my ($nodename) = @_;
+
+ my $hints = {
+ flags => AI_CANONNAME,
+ socktype => SOCK_DGRAM
+ };
+
+ my ($err, @addrs) = Socket::getaddrinfo($nodename, undef, $hints);
+
+ die "getaddrinfo: $err" if $err;
+
+ return $addrs[0]->{canonname};
+}
+