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73 lines
1.5 KiB
C
73 lines
1.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini dumpkmap implementation for busybox
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*
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* Copyright (C) Arne Bernin <arne@matrix.loopback.org>
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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 <unistd.h>
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#include <string.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include "busybox.h"
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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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#define KDGKBENT 0x4B46 /* gets one entry in translation table */
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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 dumpkmap_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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char flags[MAX_NR_KEYMAPS], magic[] = "bkeymap";
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if (argc >= 2 && *argv[1] == '-')
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bb_show_usage();
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fd = bb_xopen(CURRENT_VC, O_RDWR);
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write(1, magic, 7);
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/* Here we want to set everything to 0 except for indexes:
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* [0-2] [4-6] [8-10] [12] */
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memset(flags, 0x00, MAX_NR_KEYMAPS);
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memset(flags, 0x01, 13);
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flags[3] = flags[7] = flags[11] = 0;
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/* dump flags */
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write(1, flags, MAX_NR_KEYMAPS);
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for (i = 0; i < MAX_NR_KEYMAPS; i++) {
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if (flags[i] == 1) {
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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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if (ioctl(fd, KDGKBENT, &ke) < 0) {
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bb_perror_msg("ioctl failed with %s, %s, %p",
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(char *)&ke.kb_index,
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(char *)&ke.kb_table,
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&ke.kb_value);
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} else {
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write(1, (void*)&ke.kb_value, 2);
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}
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}
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}
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}
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close(fd);
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return EXIT_SUCCESS;
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}
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