1 files changed, 16 insertions, 2 deletions
diff --git a/sitesummary-nodes b/sitesummary-nodes
index c5b2f70..b753a76 100755
--- a/sitesummary-nodes
+++ b/sitesummary-nodes
@@ -9,14 +9,28 @@ use warnings;
 use SiteSummary;
 use Getopt::Std;
 
+sub usage {
+    print <<EOF;
+Usage: $0 [-hmnw]
+
+ -h  Show usage information
+ -m  Generate munin configuration for all munin clients
+ -n  Generate nagios configuration for all nagios clients
+ -w  List all client DNS/IP-addresses and MAC addresses
+EOF
+}
+
 my %opts;
-getopts("mnw", \%opts);
+getopts("hmnw", \%opts) || (usage(), exit(1));
 
 my %hostnames;
 
 for_all_hosts(\&handle_host);
 
-if ($opts{'m'}) {
+if ($opts{'h'}) {
+    usage();
+    exit 0;
+} elsif ($opts{'m'}) {
     print_munin_list();
 } elsif ($opts{'w'}) {
     print_ip_hw_list();