blob: bf8d690daa87da922dede1d01965b5a29154cdf8
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini dumpkmap implementation for busybox |
4 | * |
5 | * Copyright (C) Arne Bernin <arne@matrix.loopback.org> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
8 | * |
9 | */ |
10 | /* no options, no getopt */ |
11 | |
12 | //usage:#define dumpkmap_trivial_usage |
13 | //usage: "> keymap" |
14 | //usage:#define dumpkmap_full_usage "\n\n" |
15 | //usage: "Print a binary keyboard translation table to stdout" |
16 | //usage: |
17 | //usage:#define dumpkmap_example_usage |
18 | //usage: "$ dumpkmap > keymap\n" |
19 | |
20 | #include "libbb.h" |
21 | |
22 | /* From <linux/kd.h> */ |
23 | struct kbentry { |
24 | unsigned char kb_table; |
25 | unsigned char kb_index; |
26 | unsigned short kb_value; |
27 | }; |
28 | #define KDGKBENT 0x4B46 /* gets one entry in translation table */ |
29 | |
30 | /* From <linux/keyboard.h> */ |
31 | #define NR_KEYS 128 |
32 | #define MAX_NR_KEYMAPS 256 |
33 | |
34 | int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
35 | int dumpkmap_main(int argc UNUSED_PARAM, char **argv) |
36 | { |
37 | struct kbentry ke; |
38 | int i, j, fd; |
39 | #define flags bb_common_bufsiz1 |
40 | |
41 | /* When user accidentally runs "dumpkmap FILE" |
42 | * instead of "dumpkmap >FILE", we'd dump binary stuff to tty. |
43 | * Let's prevent it: |
44 | */ |
45 | if (argv[1]) |
46 | bb_show_usage(); |
47 | /* bb_warn_ignoring_args(argv[1]);*/ |
48 | |
49 | fd = get_console_fd_or_die(); |
50 | |
51 | #if 0 |
52 | write(STDOUT_FILENO, "bkeymap", 7); |
53 | /* Here we want to set everything to 0 except for indexes: |
54 | * [0-2] [4-6] [8-10] [12] |
55 | */ |
56 | /*memset(flags, 0x00, MAX_NR_KEYMAPS); - already is */ |
57 | memset(flags, 0x01, 13); |
58 | flags[3] = flags[7] = flags[11] = 0; |
59 | /* dump flags */ |
60 | write(STDOUT_FILENO, flags, MAX_NR_KEYMAPS); |
61 | #define flags7 flags |
62 | #else |
63 | /* Same effect */ |
64 | /* 0 1 2 3 4 5 6 7 8 9 a b c=12 */ |
65 | memcpy(flags, "bkeymap\1\1\1\0\1\1\1\0\1\1\1\0\1", |
66 | /* Can use sizeof, or sizeof-1. sizeof is even, using that */ |
67 | /****/ sizeof("bkeymap\1\1\1\0\1\1\1\0\1\1\1\0\1") |
68 | ); |
69 | write(STDOUT_FILENO, flags, 7 + MAX_NR_KEYMAPS); |
70 | #define flags7 (flags + 7) |
71 | #endif |
72 | |
73 | for (i = 0; i < 13; i++) { |
74 | if (flags7[i]) { |
75 | for (j = 0; j < NR_KEYS; j++) { |
76 | ke.kb_index = j; |
77 | ke.kb_table = i; |
78 | if (!ioctl_or_perror(fd, KDGKBENT, &ke, |
79 | "ioctl(KDGKBENT{%d,%d}) failed", |
80 | j, i) |
81 | ) { |
82 | write(STDOUT_FILENO, &ke.kb_value, 2); |
83 | } |
84 | } |
85 | } |
86 | } |
87 | if (ENABLE_FEATURE_CLEAN_UP) { |
88 | close(fd); |
89 | } |
90 | return EXIT_SUCCESS; |
91 | } |
92 |