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 tarball for details.
11 #define BINARY_KEYMAP_MAGIC "bkeymap"
13 /* From <linux/kd.h> */
15 unsigned char kb_table;
16 unsigned char kb_index;
17 unsigned short kb_value;
19 /* sets one entry in translation table */
20 #define KDSKBENT 0x4B47
22 /* From <linux/keyboard.h> */
24 #define MAX_NR_KEYMAPS 256
26 int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
27 int loadkmap_main(int argc UNUSED_PARAM, char **argv)
31 uint16_t ibuff[NR_KEYS];
32 /* const char *tty_name = CURRENT_TTY; */
33 RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
35 /* When user accidentally runs "loadkmap FILE"
36 * instead of "loadkmap <FILE", we end up waiting for input from tty.
37 * Let's prevent it: */
40 /* bb_warn_ignoring_args(argv[1]); */
41 fd = get_console_fd_or_die();
43 opt = getopt32(argv, "C:", &tty_name);
44 fd = xopen_nonblocking(tty_name);
47 xread(STDIN_FILENO, flags, 7);
48 if (strncmp(flags, BINARY_KEYMAP_MAGIC, 7))
49 bb_error_msg_and_die("not a valid binary keymap");
51 xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
53 for (i = 0; i < MAX_NR_KEYMAPS; i++) {
55 xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t));
56 for (j = 0; j < NR_KEYS; j++) {
59 ke.kb_value = ibuff[j];
60 ioctl(fd, KDSKBENT, &ke);
65 if (ENABLE_FEATURE_CLEAN_UP) {
67 RELEASE_CONFIG_BUFFER(flags);