1 files changed, 6 insertions, 0 deletions

diff --git a/trace-graph-main.c b/trace-graph-main.c
index a6507ee..b373dd2 100644
--- a/trace-graph-main.c
+++ b/trace-graph-main.c
@@ -189,6 +189,12 @@ void trace_graph(int argc, char **argv)
                 }
         }
 
+        if ((argc - optind) >= 1) {
+                if (input_file)
+                        usage(basename(argv[0]));
+                input_file = argv[optind];
+        }
+
         if (!input_file) {
                 ret = stat(default_input_file, &st);
                 if (ret >= 0)