Print which arguments were unknown before giving usage message

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/xmag.c b/xmag.c
index f74eb43..3dff66c 100644
--- a/xmag.c
+++ b/xmag.c
@@ -1123,6 +1123,11 @@ main(int argc, char *argv[])
   XtGetApplicationResources(toplevel, (XtPointer) &options, resources,
 			    XtNumber(resources), NULL, 0);
   if (argc != 1) {
+    fputs("Unknown argument(s):", stderr);
+    for (int n = 1; n < argc; n++) {
+      fprintf(stderr, " %s", argv[n]);
+    }
+    fputs("\n\n", stderr);
     fprintf (stderr,
 	    "usage:  xmag [-source geom] [-mag magfactor] [-toolkitoption]\n");
     exit(1);