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]); */
52 fd
= get_console_fd_or_die();
54 opt = getopt32(argv, "C:", &tty_name);
55 fd = xopen_nonblocking(tty_name);
58 xread(STDIN_FILENO
, flags
, 7);
59 if (strncmp(flags
, BINARY_KEYMAP_MAGIC
, 7))
60 bb_error_msg_and_die("not a valid binary keymap");
62 xread(STDIN_FILENO
, flags
, MAX_NR_KEYMAPS
);
64 for (i
= 0; i
< MAX_NR_KEYMAPS
; i
++) {
67 xread(STDIN_FILENO
, ibuff
, NR_KEYS
* sizeof(uint16_t));
68 for (j
= 0; j
< NR_KEYS
; j
++) {
71 ke
.kb_value
= ibuff
[j
];
73 * Note: table[idx:0] can contain special value
74 * K_ALLOCATED (marks allocated tables in kernel).
75 * dumpkmap saves the value as-is; but attempts
76 * to load it here fail, since it isn't a valid
77 * key value: it is K(KT_SPEC,126) == 2<<8 + 126,
78 * whereas last valid KT_SPEC is
79 * K_BARENUMLOCK == K(KT_SPEC,19).
80 * So far we just ignore these errors:
82 ioctl(fd
, KDSKBENT
, &ke
);
86 if (ENABLE_FEATURE_CLEAN_UP
) {
88 RELEASE_CONFIG_BUFFER(flags
);