From 952fa4dc28a3daba23ba5da6a99b2bb67a73ecac Mon Sep 17 00:00:00 2001
From: Giuseppe Scrivano <gscrivan@redhat.com>
Date: Wed, 24 Aug 2022 15:09:02 +0200
Subject: [PATCH] main: print a warning if an argument is ignored

Closes: https://github.com/containers/fuse-overlayfs/issues/339

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
---
 main.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/main.c b/main.c
index a171ff7..376080a 100644
--- a/main.c
+++ b/main.c
@@ -5454,7 +5454,10 @@ fuse_opt_proc (void *data, const char *arg, int key, struct fuse_args *outargs)
     }
   /* Ignore unknown arguments.  */
   if (key == -1)
-    return 0;
+    {
+      fprintf (stderr, "unknown argument ignored: %s\n", arg);
+      return 0;
+    }
 
   return 1;
 }