From c18c244b52d5af271ce81983f53a3905ca2a9f35 Mon Sep 17 00:00:00 2001
From: Pieter Lexis <pieter.lexis@powerdns.com>
Date: Fri, 29 Apr 2016 17:00:47 +0200
Subject: [PATCH] Add --help and --version to dnsscan

---
 pdns/dnsscan.cc | 20 ++++++++++++++++++--
 1 file changed, 18 insertions(+), 2 deletions(-)

diff --git a/pdns/dnsscan.cc b/pdns/dnsscan.cc
index f9a0afc33..084839d45 100644
--- a/pdns/dnsscan.cc
+++ b/pdns/dnsscan.cc
@@ -25,6 +25,10 @@ using namespace ::boost::multi_index;
 #include "namespaces.hh"
 StatBag S;
 
+void usage() {
+  cerr<<"syntax: dnsscan INFILE ..."<<endl;
+}
+
 int main(int argc, char** argv)
 try
 {
@@ -37,8 +41,20 @@ try
   */
 
   if(argc<2) {
-    cerr<<"Syntax: dnsscan file1 [file2 ..] "<<endl;
-    exit(1);
+    usage();
+    exit(EXIT_SUCCESS);
+  }
+
+  for(int n=1; n < argc; ++n) {
+    if ((string) argv[n] == "--help") {
+      usage();
+      return EXIT_SUCCESS;
+    }
+
+    if ((string) argv[n] == "--version") {
+      cerr<<"dnsscan "<<VERSION<<endl;
+      return EXIT_SUCCESS;
+    }
   }
 
   unsigned int counts[256];
-- 
2.40.0