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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 tarball for details.
*
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include "busybox.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)
{
struct kbentry ke;
int i, j, fd;
char flags[MAX_NR_KEYMAPS], magic[] = "bkeymap";
if (argc >= 2 && *argv[1] == '-')
bb_show_usage();
fd = bb_xopen(CURRENT_VC, O_RDWR);
write(1, magic, 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(1, 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(fd, KDGKBENT, &ke) < 0) {
bb_perror_msg("ioctl failed with %s, %s, %p",
(char *)&ke.kb_index,
(char *)&ke.kb_table,
&ke.kb_value);
} else {
write(1, (void*)&ke.kb_value, 2);
}
}
}
}
close(fd);
return EXIT_SUCCESS;
}
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