Check non-option arguments

Make sure all commands check to see if there are any "extra" arguments
after the options, and print an error if so.

Made all error messages consistent (which is to say, minimal).

Fixes: #13527

Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
Reviewed-by: Tomas Mraz <tmraz@fedoraproject.org>
(Merged from https://github.com/openssl/openssl/pull/13563)

1 files changed, 2 insertions, 0 deletions

diff --git a/apps/req.c b/apps/req.c
index ad79866a5a..84b6a4c00c 100644
--- a/apps/req.c
+++ b/apps/req.c
@@ -449,6 +449,8 @@ int req_main(int argc, char **argv)
             break;
         }
     }
+
+    /* No extra arguments. */
     argc = opt_num_rest();
     if (argc != 0)
         goto opthelp;