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"
15 ////usage: "\n -C TTY Affect TTY instead of /dev/tty"
17 //usage:#define loadkmap_example_usage
18 //usage: "$ loadkmap < /etc/i18n/lang-keymap\n"
22 #define BINARY_KEYMAP_MAGIC "bkeymap"
24 /* From <linux/kd.h> */
26 unsigned char kb_table;
27 unsigned char kb_index;
28 unsigned short kb_value;
30 /* sets one entry in translation table */
31 #define KDSKBENT 0x4B47
33 /* From <linux/keyboard.h> */
35 #define MAX_NR_KEYMAPS 256
37 int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
38 int loadkmap_main(int argc UNUSED_PARAM, char **argv)
42 uint16_t ibuff[NR_KEYS];
43 /* const char *tty_name = CURRENT_TTY; */
44 RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
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: */
51 /* bb_warn_ignoring_args(argv[1]); */
53 fd = get_console_fd_or_die();
55 opt = getopt32(argv, "C:", &tty_name);
56 fd = xopen_nonblocking(tty_name);
59 xread(STDIN_FILENO, flags, 7);
60 if (!is_prefixed_with(flags, BINARY_KEYMAP_MAGIC))
61 bb_error_msg_and_die("not a valid binary keymap");
63 xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
65 for (i = 0; i < MAX_NR_KEYMAPS; i++) {
68 xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t));
69 for (j = 0; j < NR_KEYS; j++) {
72 ke.kb_value = ibuff[j];
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:
83 ioctl(fd, KDSKBENT, &ke);
87 if (ENABLE_FEATURE_CLEAN_UP) {
89 RELEASE_CONFIG_BUFFER(flags);