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/* vi: set sw=4 ts=4: */
/*
* Mini dumpkmap implementation for busybox
*
* Copyright (C) Arne Bernin <arne@matrix.loopback.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
*/
/* no options, no getopt */
//usage:#define dumpkmap_trivial_usage
//usage: "> keymap"
//usage:#define dumpkmap_full_usage "\n\n"
//usage: "Print a binary keyboard translation table to stdout"
//usage:
//usage:#define dumpkmap_example_usage
//usage: "$ dumpkmap > keymap\n"
#include "libbb.h"
/* From <linux/kd.h> */
struct kbentry {
unsigned char kb_table;
unsigned char kb_index;
unsigned short kb_value;
};
#define KDGKBENT 0x4B46 /* gets one entry in translation table */
/* From <linux/keyboard.h> */
#define NR_KEYS 128
#define MAX_NR_KEYMAPS 256
int dumpkmap_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int dumpkmap_main(int argc UNUSED_PARAM, char **argv)
{
struct kbentry ke;
int i, j, fd;
RESERVE_CONFIG_BUFFER(flags, MAX_NR_KEYMAPS);
/* When user accidentally runs "dumpkmap FILE"
* instead of "dumpkmap >FILE", we'd dump binary stuff to tty.
* Let's prevent it: */
if (argv[1])
bb_show_usage();
/* bb_warn_ignoring_args(argv[1]);*/
fd = get_console_fd_or_die();
write(STDOUT_FILENO, "bkeymap", 7);
/* Here we want to set everything to 0 except for indexes:
* [0-2] [4-6] [8-10] [12] */
memset(flags, 0x00, MAX_NR_KEYMAPS);
memset(flags, 0x01, 13);
flags[3] = flags[7] = flags[11] = 0;
/* dump flags */
write(STDOUT_FILENO, flags, MAX_NR_KEYMAPS);
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
if (flags[i] == 1) {
for (j = 0; j < NR_KEYS; j++) {
ke.kb_index = j;
ke.kb_table = i;
if (!ioctl_or_perror(fd, KDGKBENT, &ke,
"ioctl failed with %s, %s, %p",
(char *)&ke.kb_index,
(char *)&ke.kb_table,
&ke.kb_value)
) {
write(STDOUT_FILENO, (void*)&ke.kb_value, 2);
}
}
}
}
if (ENABLE_FEATURE_CLEAN_UP) {
close(fd);
RELEASE_CONFIG_BUFFER(flags);
}
return EXIT_SUCCESS;
}
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