source: branches/3.0/mindi-busybox/console-tools/dumpkmap.c @ 3085

Last change on this file since 3085 was 2725, checked in by bruno, 8 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
File size: 1.7 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#include "libbb.h"
13
14/* From <linux/kd.h> */
15struct kbentry {
16    unsigned char kb_table;
17    unsigned char kb_index;
18    unsigned short kb_value;
19};
20#define KDGKBENT 0x4B46  /* gets one entry in translation table */
21
22/* From <linux/keyboard.h> */
23#define NR_KEYS 128
24#define MAX_NR_KEYMAPS 256
25
26int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
27int dumpkmap_main(int argc UNUSED_PARAM, char **argv)
28{
29    struct kbentry ke;
30    int i, j, fd;
31    RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
32
33    /* When user accidentally runs "dumpkmap FILE"
34     * instead of "dumpkmap >FILE", we'd dump binary stuff to tty.
35     * Let's prevent it: */
36    if (argv[1])
37        bb_show_usage();
38/*  bb_warn_ignoring_args(argv[1]);*/
39
40    fd = get_console_fd_or_die();
41
42    write(STDOUT_FILENO, "bkeymap", 7);
43
44    /* Here we want to set everything to 0 except for indexes:
45     * [0-2] [4-6] [8-10] [12] */
46    memset(flags, 0x00, MAX_NR_KEYMAPS);
47    memset(flags, 0x01, 13);
48    flags[3] = flags[7] = flags[11] = 0;
49
50    /* dump flags */
51    write(STDOUT_FILENO, flags, MAX_NR_KEYMAPS);
52
53    for (i = 0; i < MAX_NR_KEYMAPS; i++) {
54        if (flags[i] == 1) {
55            for (j = 0; j < NR_KEYS; j++) {
56                ke.kb_index = j;
57                ke.kb_table = i;
58                if (!ioctl_or_perror(fd, KDGKBENT, &ke,
59                        "ioctl failed with %s, %s, %p",
60                        (char *)&ke.kb_index,
61                        (char *)&ke.kb_table,
62                        &ke.kb_value)
63                ) {
64                    write(STDOUT_FILENO, (void*)&ke.kb_value, 2);
65                }
66            }
67        }
68    }
69    if (ENABLE_FEATURE_CLEAN_UP) {
70        close(fd);
71        RELEASE_CONFIG_BUFFER(flags);
72    }
73    return EXIT_SUCCESS;
74}
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