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/* 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 tarball for details.
*
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include "busybox.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)
{
struct kbentry ke;
int i, j, fd;
u_short ibuff[NR_KEYS];
char flags[MAX_NR_KEYMAPS];
char buff[7];
if (argc != 1)
bb_show_usage();
fd = bb_xopen(CURRENT_VC, O_RDWR);
if ((bb_full_read(0, buff, 7) != 7) || (strncmp(buff, BINARY_KEYMAP_MAGIC, 7) != 0))
bb_error_msg_and_die("This is not a valid binary keymap.");
if (bb_full_read(0, flags, MAX_NR_KEYMAPS) != MAX_NR_KEYMAPS)
bb_perror_msg_and_die("Error reading keymap flags");
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
if (flags[i] == 1) {
bb_full_read(0, ibuff, NR_KEYS * sizeof(u_short));
for (j = 0; j < NR_KEYS; j++) {
ke.kb_index = j;
ke.kb_table = i;
ke.kb_value = ibuff[j];
ioctl(fd, KDSKBENT, &ke);
}
}
}
/* Don't bother to close files. Exit does that
* automagically, so we can save a few bytes */
/* close(fd); */
return EXIT_SUCCESS;
}
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