source: branches/3.2/mindi-busybox/console-tools/loadkmap.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 loadkmap implementation for busybox
4 *
5 * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 */
9
10//usage:#define loadkmap_trivial_usage
11//usage:       "< keymap"
12//usage:#define loadkmap_full_usage "\n\n"
13//usage:       "Load a binary keyboard translation table from stdin\n"
14/* //usage:     "\n -C TTY  Affect TTY instead of /dev/tty" */
15//usage:
16//usage:#define loadkmap_example_usage
17//usage:       "$ loadkmap < /etc/i18n/lang-keymap\n"
18
19#include "libbb.h"
20
21#define BINARY_KEYMAP_MAGIC "bkeymap"
22
23/* From <linux/kd.h> */
24struct kbentry {
25    unsigned char kb_table;
26    unsigned char kb_index;
27    unsigned short kb_value;
28};
29/* sets one entry in translation table */
30#define KDSKBENT        0x4B47
31
32/* From <linux/keyboard.h> */
33#define NR_KEYS         128
34#define MAX_NR_KEYMAPS  256
35
36int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
37int loadkmap_main(int argc UNUSED_PARAM, char **argv)
38{
39    struct kbentry ke;
40    int i, j, fd;
41    uint16_t ibuff[NR_KEYS];
42/*  const char *tty_name = CURRENT_TTY; */
43    RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
44
45    /* When user accidentally runs "loadkmap FILE"
46     * instead of "loadkmap <FILE", we end up waiting for input from tty.
47     * Let's prevent it: */
48    if (argv[1])
49        bb_show_usage();
50/* bb_warn_ignoring_args(argv[1]); */
51    fd = get_console_fd_or_die();
52/* or maybe:
53    opt = getopt32(argv, "C:", &tty_name);
54    fd = xopen_nonblocking(tty_name);
55*/
56
57    xread(STDIN_FILENO, flags, 7);
58    if (strncmp(flags, BINARY_KEYMAP_MAGIC, 7))
59        bb_error_msg_and_die("not a valid binary keymap");
60
61    xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
62
63    for (i = 0; i < MAX_NR_KEYMAPS; i++) {
64        if (flags[i] == 1) {
65            xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t));
66            for (j = 0; j < NR_KEYS; j++) {
67                ke.kb_index = j;
68                ke.kb_table = i;
69                ke.kb_value = ibuff[j];
70                ioctl(fd, KDSKBENT, &ke);
71            }
72        }
73    }
74
75    if (ENABLE_FEATURE_CLEAN_UP) {
76        close(fd);
77        RELEASE_CONFIG_BUFFER(flags);
78    }
79    return EXIT_SUCCESS;
80}
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