1 files changed, 6 insertions, 1 deletions
diff --git a/console-tools/dumpkmap.c b/console-tools/dumpkmap.c
index 061fc4792..a03b59340 100644
--- a/console-tools/dumpkmap.c
+++ b/console-tools/dumpkmap.c
@@ -24,12 +24,17 @@ struct kbentry {
 #define MAX_NR_KEYMAPS 256
 int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int dumpkmap_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
+int dumpkmap_main(int argc UNUSED_PARAM, char **argv)
 {
        struct kbentry ke;
        int i, j, fd;
        RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
+        /* When user accidentally runs "dumpkmap FILE"
+         * instead of "dumpkmap >FILE", we'd dump binary stuff to tty.
+         * Let's prevent it: */
+        if (argv[1])
+                bb_show_usage();
 /*      bb_warn_ignoring_args(argv[1]);*/
        fd = get_console_fd_or_die();