mirror of
https://github.com/sheumann/hush.git
synced 2024-11-19 08:31:11 +00:00
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Mini loadkmap implementation for busybox
|
|
*
|
|
* Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
|
|
*/
|
|
|
|
//usage:#define loadkmap_trivial_usage
|
|
//usage: "< keymap"
|
|
//usage:#define loadkmap_full_usage "\n\n"
|
|
//usage: "Load a binary keyboard translation table from stdin\n"
|
|
/* //usage: "\n -C TTY Affect TTY instead of /dev/tty" */
|
|
//usage:
|
|
//usage:#define loadkmap_example_usage
|
|
//usage: "$ loadkmap < /etc/i18n/lang-keymap\n"
|
|
|
|
#include "libbb.h"
|
|
|
|
#define BINARY_KEYMAP_MAGIC "bkeymap"
|
|
|
|
/* From <linux/kd.h> */
|
|
struct kbentry {
|
|
unsigned char kb_table;
|
|
unsigned char kb_index;
|
|
unsigned short kb_value;
|
|
};
|
|
/* sets one entry in translation table */
|
|
#define KDSKBENT 0x4B47
|
|
|
|
/* From <linux/keyboard.h> */
|
|
#define NR_KEYS 128
|
|
#define MAX_NR_KEYMAPS 256
|
|
|
|
int loadkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int loadkmap_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
struct kbentry ke;
|
|
int i, j, fd;
|
|
uint16_t ibuff[NR_KEYS];
|
|
/* const char *tty_name = CURRENT_TTY; */
|
|
RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
|
|
|
|
/* When user accidentally runs "loadkmap FILE"
|
|
* instead of "loadkmap <FILE", we end up waiting for input from tty.
|
|
* Let's prevent it: */
|
|
if (argv[1])
|
|
bb_show_usage();
|
|
/* bb_warn_ignoring_args(argv[1]); */
|
|
|
|
fd = get_console_fd_or_die();
|
|
/* or maybe:
|
|
opt = getopt32(argv, "C:", &tty_name);
|
|
fd = xopen_nonblocking(tty_name);
|
|
*/
|
|
|
|
xread(STDIN_FILENO, flags, 7);
|
|
if (strncmp(flags, BINARY_KEYMAP_MAGIC, 7))
|
|
bb_error_msg_and_die("not a valid binary keymap");
|
|
|
|
xread(STDIN_FILENO, flags, MAX_NR_KEYMAPS);
|
|
|
|
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
|
|
if (flags[i] != 1)
|
|
continue;
|
|
xread(STDIN_FILENO, ibuff, NR_KEYS * sizeof(uint16_t));
|
|
for (j = 0; j < NR_KEYS; j++) {
|
|
ke.kb_index = j;
|
|
ke.kb_table = i;
|
|
ke.kb_value = ibuff[j];
|
|
/*
|
|
* Note: table[idx:0] can contain special value
|
|
* K_ALLOCATED (marks allocated tables in kernel).
|
|
* dumpkmap saves the value as-is; but attempts
|
|
* to load it here fail, since it isn't a valid
|
|
* key value: it is K(KT_SPEC,126) == 2<<8 + 126,
|
|
* whereas last valid KT_SPEC is
|
|
* K_BARENUMLOCK == K(KT_SPEC,19).
|
|
* So far we just ignore these errors:
|
|
*/
|
|
ioctl(fd, KDSKBENT, &ke);
|
|
}
|
|
}
|
|
|
|
if (ENABLE_FEATURE_CLEAN_UP) {
|
|
close(fd);
|
|
RELEASE_CONFIG_BUFFER(flags);
|
|
}
|
|
return EXIT_SUCCESS;
|
|
}
|