Contents of /trunk/mkinitrd-magellan/busybox/console-tools/dumpkmap.c
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
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Wed Aug 18 21:56:57 2010 UTC (14 years, 1 month ago) by niro
File MIME type: text/plain
File size: 1757 byte(s)
-updated to busybox-1.17.1
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 tarball for details. |
8 | * |
9 | */ |
10 | /* no options, no getopt */ |
11 | |
12 | #include "libbb.h" |
13 | |
14 | /* From <linux/kd.h> */ |
15 | struct 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 | |
26 | int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
27 | int 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 | } |