From 051671dca4f267eb126eeab9efc04ad3df0bf786 Mon Sep 17 00:00:00 2001 From: Baptiste Jonglez Date: Sat, 12 Jul 2014 14:50:52 +0900 Subject: [PATCH] Print a meaningful error when -M is used but SO_MARK is not supported --- mtr.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mtr.c b/mtr.c index cad2ca0..417caf6 100644 --- a/mtr.c +++ b/mtr.c @@ -491,6 +491,10 @@ void parse_arg (int argc, char **argv) exit(EXIT_FAILURE); } break; +#else + case 'M': + fprintf( stderr, "SO_MARK not enabled.\n" ); + break; #endif } } -- 2.47.2