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101 lines
2.4 KiB
C
101 lines
2.4 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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include "internal.h"
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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 <sys/ioctl.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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static const char dumpkmap_usage[] = "dumpkmap\n"
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#ifndef BB_FEATURE_TRIVIAL_HELP
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"\nPrints out a binary keyboard translation table to standard input.\n"
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#endif
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;
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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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usage(dumpkmap_usage);
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}
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fd = open("/dev/tty0", O_RDWR);
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if (fd < 0) {
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fprintf(stderr, "Error opening /dev/tty0: %s\n", strerror(errno));
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return 1;
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}
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write(1, magic, 7);
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for (i=0; i < MAX_NR_KEYMAPS; i++) flags[i]=0;
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flags[0]=1;
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flags[1]=1;
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flags[2]=1;
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flags[4]=1;
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flags[5]=1;
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flags[6]=1;
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flags[8]=1;
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flags[9]=1;
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flags[10]=1;
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flags[12]=1;
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/* dump flags */
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for (i=0; i < MAX_NR_KEYMAPS; i++) write(1,&flags[i],1);
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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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fprintf(stderr, "ioctl returned: %s, %s, %s, %xqq\n",strerror(errno),(char *)&ke.kb_index,(char *)&ke.kb_table,(int)&ke.kb_value);
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}
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else {
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write(1,&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 0;
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}
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