Show dumpkmap.c syntax highlighted
/* vi: set sw=4 ts=4: */
/*
* Mini dumpkmap implementation for busybox
*
* Copyright (C) Arne Bernin <arne@matrix.loopback.org>
*
* 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 <unistd.h>
#include <string.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include "busybox.h"
/* From <linux/kd.h> */
struct kbentry {
unsigned char kb_table;
unsigned char kb_index;
unsigned short kb_value;
};
static const int KDGKBENT = 0x4B46; /* gets one entry in translation table */
/* From <linux/keyboard.h> */
static const int NR_KEYS = 128;
static const int MAX_NR_KEYMAPS = 256;
int dumpkmap_main(int argc, char **argv)
{
struct kbentry ke;
int i, j, fd;
char flags[MAX_NR_KEYMAPS], magic[] = "bkeymap";
if (argc>=2 && *argv[1]=='-') {
show_usage();
}
fd = open(CURRENT_VC, O_RDWR);
if (fd < 0) {
perror_msg("Error opening " CURRENT_VC);
return EXIT_FAILURE;
}
write(1, magic, 7);
for (i=0; i < MAX_NR_KEYMAPS; i++) flags[i]=0;
flags[0]=1;
flags[1]=1;
flags[2]=1;
flags[4]=1;
flags[5]=1;
flags[6]=1;
flags[8]=1;
flags[9]=1;
flags[10]=1;
flags[12]=1;
/* dump flags */
for (i=0; i < MAX_NR_KEYMAPS; i++) write(1,&flags[i],1);
for (i = 0; i < MAX_NR_KEYMAPS; i++) {
if (flags[i] == 1) {
for (j = 0; j < NR_KEYS; j++) {
ke.kb_index = j;
ke.kb_table = i;
if (ioctl(fd, KDGKBENT, &ke) < 0) {
error_msg("ioctl returned: %s, %s, %s, %xqq", strerror(errno),(char *)&ke.kb_index,(char *)&ke.kb_table,(int)&ke.kb_value);
}
else {
write(1,(void*)&ke.kb_value,2);
}
}
}
}
close(fd);
return EXIT_SUCCESS;
}
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