1 /* vi: set sw=4 ts=4: */
3 * Mini dumpkmap implementation for busybox
5 * Copyright (C) Arne Bernin <arne@matrix.loopback.org>
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 /* no options, no getopt */
12 //usage:#define dumpkmap_trivial_usage
14 //usage:#define dumpkmap_full_usage "\n\n"
15 //usage: "Print a binary keyboard translation table to stdout"
17 //usage:#define dumpkmap_example_usage
18 //usage: "$ dumpkmap > keymap\n"
22 /* From <linux/kd.h> */
24 unsigned char kb_table
;
25 unsigned char kb_index
;
26 unsigned short kb_value
;
28 #define KDGKBENT 0x4B46 /* gets one entry in translation table */
30 /* From <linux/keyboard.h> */
32 #define MAX_NR_KEYMAPS 256
34 int dumpkmap_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
35 int dumpkmap_main(int argc UNUSED_PARAM
, char **argv
)
39 RESERVE_CONFIG_BUFFER(flags
, MAX_NR_KEYMAPS
);
41 /* When user accidentally runs "dumpkmap FILE"
42 * instead of "dumpkmap >FILE", we'd dump binary stuff to tty.
43 * Let's prevent it: */
46 /* bb_warn_ignoring_args(argv[1]);*/
48 fd
= get_console_fd_or_die();
50 write(STDOUT_FILENO
, "bkeymap", 7);
52 /* Here we want to set everything to 0 except for indexes:
53 * [0-2] [4-6] [8-10] [12] */
54 memset(flags
, 0x00, MAX_NR_KEYMAPS
);
55 memset(flags
, 0x01, 13);
56 flags
[3] = flags
[7] = flags
[11] = 0;
59 write(STDOUT_FILENO
, flags
, MAX_NR_KEYMAPS
);
61 for (i
= 0; i
< MAX_NR_KEYMAPS
; i
++) {
63 for (j
= 0; j
< NR_KEYS
; j
++) {
66 if (!ioctl_or_perror(fd
, KDGKBENT
, &ke
,
67 "ioctl failed with %s, %s, %p",
72 write(STDOUT_FILENO
, (void*)&ke
.kb_value
, 2);
77 if (ENABLE_FEATURE_CLEAN_UP
) {
79 RELEASE_CONFIG_BUFFER(flags
);