From cfa1a004334d6af9808a04acd11de4a2e3b1f145 Mon Sep 17 00:00:00 2001
From: Job Snijders <job@instituut.net>
Date: Tue, 31 Dec 2019 14:36:44 +0100
Subject: [PATCH] Add -v version command line option

---
 bgpq4.c | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/bgpq4.c b/bgpq4.c
index 723b900..414c3fc 100644
--- a/bgpq4.c
+++ b/bgpq4.c
@@ -77,10 +77,22 @@ usage(int ecode)
 		    "             use 'host:port' to specify alternate port\n");
 	printf(" -S sources: only use specified IRR sources, in the specified order\n");
 	printf(" -T        : disable pipelining (not recommended)\n");
-	printf("\n" PACKAGE_NAME " version: " PACKAGE_VERSION "\n");
+	printf(" -v        : print version and exit\n");
+	printf("\n" PACKAGE_NAME " version: " PACKAGE_VERSION " "
+	    "(https://github.com/bgp/bgpq4)\n");
 	exit(ecode);
 }
 
+void
+version()
+{
+	printf(PACKAGE_NAME " - a versatile utility to generate BGP filters\n"
+	    "version: " PACKAGE_VERSION "\n"
+	    "website: https://github.com/bgp/bgpq4\n"
+	    "maintainer: Job Snijders <job@ntt.net>\n");
+	exit(0);
+}
+
 void
 exclusive()
 {
@@ -154,7 +166,7 @@ main(int argc, char* argv[])
 	if (getenv("IRRD_SOURCES"))
 		expander.sources=getenv("IRRD_SOURCES");
 
-	while ((c = getopt(argc,argv,"346a:AbBdDEF:S:jJKf:l:L:m:M:NnW:pr:R:G:tTh:UwXsz"))
+	while ((c = getopt(argc,argv,"346a:AbBdDEF:S:jJKf:l:L:m:M:NnW:pr:R:G:tTh:UwXsvz"))
 	    !=EOF) {
 	switch (c) {
         case '3':
@@ -376,6 +388,9 @@ main(int argc, char* argv[])
 				vendor_exclusive();
 			expander.vendor = V_CISCO_XR;
 			break;
+		case 'v':
+			version();
+			break;
 		case 'z':
 			if (expander.generation)
 				exclusive();