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/* vi: set sw=4 ts=4: */
/*
* Mini loadkmap implementation for busybox
*
* Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#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;
};
static const int KDSKBENT = 0x4B47; /* sets one entry in translation table */
/* From <linux/keyboard.h> */
static const int NR_KEYS = 128;
static const int MAX_NR_KEYMAPS = 256;
int loadkmap_main(int argc, char **argv)
{
struct kbentry ke;
u_short *ibuff;
int i, j, fd, readsz, pos, ibuffsz = NR_KEYS * sizeof(u_short);
char flags[MAX_NR_KEYMAPS], buff[7];
if (argc != 1)
bb_show_usage();
fd = open(CURRENT_VC, O_RDWR);
if (fd < 0)
bb_perror_msg_and_die("Error opening " CURRENT_VC);
read(0, buff, 7);
if (0 != strncmp(buff, BINARY_KEYMAP_MAGIC, 7))
bb_error_msg_and_die("This is not a valid binary keymap.");
if (MAX_NR_KEYMAPS != read(0, flags, MAX_NR_KEYMAPS))
bb_perror_msg_and_die("Error reading keymap flags");
ibuff = (u_short *) xmalloc(ibuffsz);
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
if (flags[i] == 1) {
pos = 0;
while (pos < ibuffsz) {
if ((readsz = read(0, (char *) ibuff + pos, ibuffsz - pos)) < 0)
bb_perror_msg_and_die("Error reading keymap");
pos += readsz;
}
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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