1 /* vi: set sw=4 ts=4: */
3 * Mini loadkmap implementation for busybox
5 * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 //usage:#define loadkmap_trivial_usage
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" */
16 //usage:#define loadkmap_example_usage
17 //usage: "$ loadkmap < /etc/i18n/lang-keymap\n"
21 #define BINARY_KEYMAP_MAGIC "bkeymap"
23 /* From <linux/kd.h> */
25 unsigned char kb_table;
26 unsigned char kb_index;
27 unsigned short kb_value;
29 /* sets one entry in translation table */
30 #define KDSKBENT 0x4B47
32 /* From <linux/keyboard.h> */
34 #define MAX_NR_KEYMAPS 256
36 int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
37 int loadkmap_main(int argc UNUSED_PARAM, char **argv)
41 uint16_t ibuff[NR_KEYS];
42 /* const char *tty_name = CURRENT_TTY; */
43 RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
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: */
50 /* bb_warn_ignoring_args(argv[1]); */
51 fd = get_console_fd_or_die();
53 opt = getopt32(argv, "C:", &tty_name);
54 fd = xopen_nonblocking(tty_name);
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");
61 xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
63 for (i = 0; i < MAX_NR_KEYMAPS; i++) {
65 xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t));
66 for (j = 0; j < NR_KEYS; j++) {
69 ke.kb_value = ibuff[j];
70 ioctl(fd, KDSKBENT, &ke);
75 if (ENABLE_FEATURE_CLEAN_UP) {
77 RELEASE_CONFIG_BUFFER(flags);