ndnsec: add a short description to the `--help` output of each command
Change-Id: Ifcc217bb096f1f27bceb609f5f117cf8b1d0c73d
diff --git a/tools/ndnsec/export.cpp b/tools/ndnsec/export.cpp
index 5641e08..0350bac 100644
--- a/tools/ndnsec/export.cpp
+++ b/tools/ndnsec/export.cpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
- * Copyright (c) 2013-2023 Regents of the University of California.
+ * Copyright (c) 2013-2024 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
@@ -47,6 +47,8 @@
po::options_description visibleOptDesc(
"Usage: ndnsec export [-h] [-o FILE] [-P PASSPHRASE] [-i|-k|-c] NAME\n"
"\n"
+ "Export a private key and its certificate in SafeBag format.\n"
+ "\n"
"Options");
visibleOptDesc.add_options()
("help,h", "produce help message")