| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Mini loadkmap implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 1998 Enrique Zanardi <ezanardi@ull.es>
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| 6 | *
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| 7 | * This program is free software; you can redistribute it and/or modify
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| 8 | * it under the terms of the GNU General Public License as published by
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| 9 | * the Free Software Foundation; either version 2 of the License, or
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| 10 | * (at your option) any later version.
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| 11 | *
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| 12 | * This program is distributed in the hope that it will be useful,
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| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 15 | * General Public License for more details.
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License
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| 18 | * along with this program; if not, write to the Free Software
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| 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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| 20 | *
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| 21 | */
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| 22 |
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| 23 | #include <errno.h>
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| 24 | #include <fcntl.h>
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| 25 | #include <stdio.h>
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| 26 | #include <string.h>
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| 27 | #include <stdlib.h>
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| 28 | #include <unistd.h>
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| 29 | #include <sys/ioctl.h>
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| 30 | #include "busybox.h"
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| 31 |
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| 32 | #define BINARY_KEYMAP_MAGIC "bkeymap"
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| 33 |
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| 34 | /* From <linux/kd.h> */
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| 35 | struct kbentry {
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| 36 | unsigned char kb_table;
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| 37 | unsigned char kb_index;
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| 38 | unsigned short kb_value;
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| 39 | };
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| 40 | /* sets one entry in translation table */
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| 41 | #define KDSKBENT 0x4B47
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| 42 |
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| 43 | /* From <linux/keyboard.h> */
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| 44 | #define NR_KEYS 128
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| 45 | #define MAX_NR_KEYMAPS 256
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| 46 |
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| 47 | int loadkmap_main(int argc, char **argv)
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| 48 | {
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| 49 | struct kbentry ke;
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| 50 | int i, j, fd;
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| 51 | u_short ibuff[NR_KEYS];
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| 52 | char flags[MAX_NR_KEYMAPS];
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| 53 | char buff[7];
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| 54 |
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| 55 | if (argc != 1)
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| 56 | bb_show_usage();
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| 57 |
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| 58 | fd = bb_xopen(CURRENT_VC, O_RDWR);
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| 59 |
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| 60 | if ((bb_full_read(0, buff, 7) != 7) || (strncmp(buff, BINARY_KEYMAP_MAGIC, 7) != 0))
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| 61 | bb_error_msg_and_die("This is not a valid binary keymap.");
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| 62 |
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| 63 | if (bb_full_read(0, flags, MAX_NR_KEYMAPS) != MAX_NR_KEYMAPS)
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| 64 | bb_perror_msg_and_die("Error reading keymap flags");
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| 65 |
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| 66 | for (i = 0; i < MAX_NR_KEYMAPS; i++) {
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| 67 | if (flags[i] == 1) {
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| 68 | bb_full_read(0, ibuff, NR_KEYS * sizeof(u_short));
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| 69 | for (j = 0; j < NR_KEYS; j++) {
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| 70 | ke.kb_index = j;
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| 71 | ke.kb_table = i;
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| 72 | ke.kb_value = ibuff[j];
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| 73 | ioctl(fd, KDSKBENT, &ke);
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| 74 | }
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| 75 | }
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| 76 | }
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| 77 |
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| 78 | /* Don't bother to close files. Exit does that
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| 79 | * automagically, so we can save a few bytes */
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| 80 | /* close(fd); */
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| 81 | return EXIT_SUCCESS;
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| 82 | }
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