source: branches/stable/mindi-busybox/console-tools/loadkmap.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 2.2 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini loadkmap implementation for busybox
4 *
5 * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 *
21 */
22
23#include <errno.h>
24#include <fcntl.h>
25#include <stdio.h>
26#include <string.h>
27#include <stdlib.h>
28#include <unistd.h>
29#include <sys/ioctl.h>
30#include "busybox.h"
31
32#define BINARY_KEYMAP_MAGIC "bkeymap"
33
34/* From <linux/kd.h> */
35struct kbentry {
36    unsigned char kb_table;
37    unsigned char kb_index;
38    unsigned short kb_value;
39};
40/* sets one entry in translation table */
41#define KDSKBENT        0x4B47
42
43/* From <linux/keyboard.h> */
44#define NR_KEYS         128
45#define MAX_NR_KEYMAPS  256
46
47int loadkmap_main(int argc, char **argv)
48{
49    struct kbentry ke;
50    int i, j, fd;
51    u_short ibuff[NR_KEYS];
52    char flags[MAX_NR_KEYMAPS];
53    char buff[7];
54
55    if (argc != 1)
56        bb_show_usage();
57
58    fd = bb_xopen(CURRENT_VC, O_RDWR);
59
60    if ((bb_full_read(0, buff, 7) != 7) || (strncmp(buff, BINARY_KEYMAP_MAGIC, 7) != 0))
61        bb_error_msg_and_die("This is not a valid binary keymap.");
62
63    if (bb_full_read(0, flags, MAX_NR_KEYMAPS) != MAX_NR_KEYMAPS)
64        bb_perror_msg_and_die("Error reading keymap flags");
65
66    for (i = 0; i < MAX_NR_KEYMAPS; i++) {
67        if (flags[i] == 1) {
68            bb_full_read(0, ibuff, NR_KEYS * sizeof(u_short));
69            for (j = 0; j < NR_KEYS; j++) {
70                ke.kb_index = j;
71                ke.kb_table = i;
72                ke.kb_value = ibuff[j];
73                ioctl(fd, KDSKBENT, &ke);
74            }
75        }
76    }
77
78    /* Don't bother to close files.  Exit does that
79     * automagically, so we can save a few bytes */
80    /* close(fd); */
81    return EXIT_SUCCESS;
82}
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