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71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini loadkmap implementation for busybox
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*
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* Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include "busybox.h"
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#define BINARY_KEYMAP_MAGIC "bkeymap"
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/* From <linux/kd.h> */
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struct kbentry {
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unsigned char kb_table;
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unsigned char kb_index;
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unsigned short kb_value;
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};
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/* sets one entry in translation table */
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#define KDSKBENT 0x4B47
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/* From <linux/keyboard.h> */
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#define NR_KEYS 128
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#define MAX_NR_KEYMAPS 256
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int loadkmap_main(int argc, char **argv)
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{
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struct kbentry ke;
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int i, j, fd;
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u_short ibuff[NR_KEYS];
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char flags[MAX_NR_KEYMAPS];
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char buff[7];
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if (argc != 1)
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bb_show_usage();
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fd = bb_xopen(CURRENT_VC, O_RDWR);
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if ((bb_full_read(0, buff, 7) != 7) || (strncmp(buff, BINARY_KEYMAP_MAGIC, 7) != 0))
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bb_error_msg_and_die("This is not a valid binary keymap.");
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if (bb_full_read(0, flags, MAX_NR_KEYMAPS) != MAX_NR_KEYMAPS)
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bb_perror_msg_and_die("Error reading keymap flags");
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for (i = 0; i < MAX_NR_KEYMAPS; i++) {
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if (flags[i] == 1) {
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bb_full_read(0, ibuff, NR_KEYS * sizeof(u_short));
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for (j = 0; j < NR_KEYS; j++) {
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ke.kb_index = j;
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ke.kb_table = i;
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ke.kb_value = ibuff[j];
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ioctl(fd, KDSKBENT, &ke);
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}
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}
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}
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/* Don't bother to close files. Exit does that
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* automagically, so we can save a few bytes */
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/* close(fd); */
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return EXIT_SUCCESS;
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}
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