X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=console-tools%2Fdumpkmap.c;h=6b923d2d47bd4f9bd8d2152fe12f31f1eaa8ed3d;hb=45dc96c8a6dce3aeea983f6c32572d4cee646b5d;hp=061fc4792c1fec9e06b39ed898c304d3ac43d7f0;hpb=a355da07756e529c112249653ed5af0e2d910728;p=oweals%2Fbusybox.git

diff --git a/console-tools/dumpkmap.c b/console-tools/dumpkmap.c
index 061fc4792..6b923d2d4 100644
--- a/console-tools/dumpkmap.c
+++ b/console-tools/dumpkmap.c
@@ -4,11 +4,19 @@
  *
  * Copyright (C) Arne Bernin <arne@matrix.loopback.org>
  *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  *
  */
 /* no options, no getopt */
 
+//usage:#define dumpkmap_trivial_usage
+//usage:       "> keymap"
+//usage:#define dumpkmap_full_usage "\n\n"
+//usage:       "Print a binary keyboard translation table to stdout"
+//usage:
+//usage:#define dumpkmap_example_usage
+//usage:       "$ dumpkmap > keymap\n"
+
 #include "libbb.h"
 
 /* From <linux/kd.h> */
@@ -24,12 +32,17 @@ 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();