source: branches/3.2/mindi-busybox/console-tools/dumpkmap.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 2.0 KB
Line 
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> */
23struct 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
34int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
35int dumpkmap_main(int argc UNUSED_PARAM, char **argv)
36{
37    struct kbentry ke;
38    int i, j, fd;
39    RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
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    if (argv[1])
45        bb_show_usage();
46/*  bb_warn_ignoring_args(argv[1]);*/
47
48    fd = get_console_fd_or_die();
49
50    write(STDOUT_FILENO, "bkeymap", 7);
51
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;
57
58    /* dump flags */
59    write(STDOUT_FILENO, flags, MAX_NR_KEYMAPS);
60
61    for (i = 0; i < MAX_NR_KEYMAPS; i++) {
62        if (flags[i] == 1) {
63            for (j = 0; j < NR_KEYS; j++) {
64                ke.kb_index = j;
65                ke.kb_table = i;
66                if (!ioctl_or_perror(fd, KDGKBENT, &ke,
67                        "ioctl failed with %s, %s, %p",
68                        (char *)&ke.kb_index,
69                        (char *)&ke.kb_table,
70                        &ke.kb_value)
71                ) {
72                    write(STDOUT_FILENO, (void*)&ke.kb_value, 2);
73                }
74            }
75        }
76    }
77    if (ENABLE_FEATURE_CLEAN_UP) {
78        close(fd);
79        RELEASE_CONFIG_BUFFER(flags);
80    }
81    return EXIT_SUCCESS;
82}
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