Add support for printing daemon version
diff --git a/src/main.c b/src/main.c
index c050339..cc83f3d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -302,6 +302,7 @@
 
 static gchar *option_debug = NULL;
 static gboolean option_detach = TRUE;
+static gboolean option_version = FALSE;
 static gboolean option_udev = FALSE;
 
 static guint last_adapter_timeout = 0;
@@ -352,6 +353,8 @@
 	{ "debug", 'd', G_OPTION_FLAG_OPTIONAL_ARG,
 				G_OPTION_ARG_CALLBACK, parse_debug,
 				"Enable debug information output", "DEBUG" },
+	{ "version", 'v', 0, G_OPTION_ARG_NONE, &option_version,
+				"Show version information and exit" },
 	{ "udev", 'u', 0, G_OPTION_ARG_NONE, &option_udev,
 				"Run from udev mode of operation" },
 	{ NULL },
@@ -388,6 +391,13 @@
 		exit(1);
 	}
 
+	g_option_context_free(context);
+
+	if (option_version == TRUE) {
+		printf("%s\n", VERSION);
+		exit(0);
+	}
+
 	if (option_udev == TRUE) {
 		int err;