[821] | 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 | *
|
---|
[2725] | 7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
---|
[821] | 8 | */
|
---|
[3232] | 9 |
|
---|
| 10 | //usage:#define loadkmap_trivial_usage
|
---|
| 11 | //usage: "< keymap"
|
---|
| 12 | //usage:#define loadkmap_full_usage "\n\n"
|
---|
[3621] | 13 | //usage: "Load a binary keyboard translation table from stdin"
|
---|
| 14 | ////usage: "\n"
|
---|
| 15 | ////usage: "\n -C TTY Affect TTY instead of /dev/tty"
|
---|
[3232] | 16 | //usage:
|
---|
| 17 | //usage:#define loadkmap_example_usage
|
---|
| 18 | //usage: "$ loadkmap < /etc/i18n/lang-keymap\n"
|
---|
| 19 |
|
---|
[1765] | 20 | #include "libbb.h"
|
---|
[821] | 21 |
|
---|
| 22 | #define BINARY_KEYMAP_MAGIC "bkeymap"
|
---|
| 23 |
|
---|
| 24 | /* From <linux/kd.h> */
|
---|
| 25 | struct kbentry {
|
---|
| 26 | unsigned char kb_table;
|
---|
| 27 | unsigned char kb_index;
|
---|
| 28 | unsigned short kb_value;
|
---|
| 29 | };
|
---|
| 30 | /* sets one entry in translation table */
|
---|
| 31 | #define KDSKBENT 0x4B47
|
---|
| 32 |
|
---|
| 33 | /* From <linux/keyboard.h> */
|
---|
| 34 | #define NR_KEYS 128
|
---|
| 35 | #define MAX_NR_KEYMAPS 256
|
---|
| 36 |
|
---|
[2725] | 37 | int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 38 | int loadkmap_main(int argc UNUSED_PARAM, char **argv)
|
---|
[821] | 39 | {
|
---|
| 40 | struct kbentry ke;
|
---|
| 41 | int i, j, fd;
|
---|
[1765] | 42 | uint16_t ibuff[NR_KEYS];
|
---|
[2725] | 43 | /* const char *tty_name = CURRENT_TTY; */
|
---|
| 44 | RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
|
---|
[821] | 45 |
|
---|
[2725] | 46 | /* When user accidentally runs "loadkmap FILE"
|
---|
| 47 | * instead of "loadkmap <FILE", we end up waiting for input from tty.
|
---|
| 48 | * Let's prevent it: */
|
---|
| 49 | if (argv[1])
|
---|
[821] | 50 | bb_show_usage();
|
---|
[2725] | 51 | /* bb_warn_ignoring_args(argv[1]); */
|
---|
[3621] | 52 |
|
---|
[2725] | 53 | fd = get_console_fd_or_die();
|
---|
| 54 | /* or maybe:
|
---|
| 55 | opt = getopt32(argv, "C:", &tty_name);
|
---|
| 56 | fd = xopen_nonblocking(tty_name);
|
---|
| 57 | */
|
---|
[821] | 58 |
|
---|
[2725] | 59 | xread(STDIN_FILENO, flags, 7);
|
---|
[3621] | 60 | if (!is_prefixed_with(flags, BINARY_KEYMAP_MAGIC))
|
---|
[2725] | 61 | bb_error_msg_and_die("not a valid binary keymap");
|
---|
[821] | 62 |
|
---|
[2725] | 63 | xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
|
---|
[821] | 64 |
|
---|
| 65 | for (i = 0; i < MAX_NR_KEYMAPS; i++) {
|
---|
[3621] | 66 | if (flags[i] != 1)
|
---|
| 67 | continue;
|
---|
| 68 | xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t));
|
---|
| 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 | /*
|
---|
| 74 | * Note: table[idx:0] can contain special value
|
---|
| 75 | * K_ALLOCATED (marks allocated tables in kernel).
|
---|
| 76 | * dumpkmap saves the value as-is; but attempts
|
---|
| 77 | * to load it here fail, since it isn't a valid
|
---|
| 78 | * key value: it is K(KT_SPEC,126) == 2<<8 + 126,
|
---|
| 79 | * whereas last valid KT_SPEC is
|
---|
| 80 | * K_BARENUMLOCK == K(KT_SPEC,19).
|
---|
| 81 | * So far we just ignore these errors:
|
---|
| 82 | */
|
---|
| 83 | ioctl(fd, KDSKBENT, &ke);
|
---|
[821] | 84 | }
|
---|
| 85 | }
|
---|
| 86 |
|
---|
[2725] | 87 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 88 | close(fd);
|
---|
| 89 | RELEASE_CONFIG_BUFFER(flags);
|
---|
| 90 | }
|
---|
| 91 | return EXIT_SUCCESS;
|
---|
[821] | 92 | }
|
---|