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file: uapi/v4l/keytable.c
=========================
.. code-block:: c
/* keytable.c - This program allows checking/replacing keys at IR
Copyright (C) 2006-2009 Mauro Carvalho Chehab <mchehab@kernel.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, version 2 of the License.
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.
*/
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <linux/input.h>
#include <sys/ioctl.h>
#include "parse.h"
void prtcode (int *codes)
{
struct parse_key *p;
for (p=keynames;p->name!=NULL;p++) {
if (p->value == (unsigned)codes[1]) {
printf("scancode 0x%04x = %s (0x%02x)\\n", codes[0], p->name, codes[1]);
return;
}
}
if (isprint (codes[1]))
printf("scancode %d = '%c' (0x%02x)\\n", codes[0], codes[1], codes[1]);
else
printf("scancode %d = 0x%02x\\n", codes[0], codes[1]);
}
int parse_code(char *string)
{
struct parse_key *p;
for (p=keynames;p->name!=NULL;p++) {
if (!strcasecmp(p->name, string)) {
return p->value;
}
}
return -1;
}
int main (int argc, char *argv[])
{
int fd;
unsigned int i, j;
int codes[2];
if (argc<2 || argc>4) {
printf ("usage: %s <device> to get table; or\\n"
" %s <device> <scancode> <keycode>\\n"
" %s <device> <keycode_file>n",*argv,*argv,*argv);
return -1;
}
if ((fd = open(argv[1], O_RDONLY)) < 0) {
perror("Couldn't open input device");
return(-1);
}
if (argc==4) {
int value;
value=parse_code(argv[3]);
if (value==-1) {
value = strtol(argv[3], NULL, 0);
if (errno)
perror("value");
}
codes [0] = (unsigned) strtol(argv[2], NULL, 0);
codes [1] = (unsigned) value;
if(ioctl(fd, EVIOCSKEYCODE, codes))
perror ("EVIOCSKEYCODE");
if(ioctl(fd, EVIOCGKEYCODE, codes)==0)
prtcode(codes);
return 0;
}
if (argc==3) {
FILE *fin;
int value;
char *scancode, *keycode, s[2048];
fin=fopen(argv[2],"r");
if (fin==NULL) {
perror ("opening keycode file");
return -1;
}
/* Clears old table */
for (j = 0; j < 256; j++) {
for (i = 0; i < 256; i++) {
codes[0] = (j << 8) | i;
codes[1] = KEY_RESERVED;
ioctl(fd, EVIOCSKEYCODE, codes);
}
}
while (fgets(s,sizeof(s),fin)) {
scancode=strtok(s,"\\n\\t =:");
if (!scancode) {
perror ("parsing input file scancode");
return -1;
}
if (!strcasecmp(scancode, "scancode")) {
scancode = strtok(NULL,"\\n\\t =:");
if (!scancode) {
perror ("parsing input file scancode");
return -1;
}
}
keycode=strtok(NULL,"\\n\\t =:(");
if (!keycode) {
perror ("parsing input file keycode");
return -1;
}
// printf ("parsing %s=%s:", scancode, keycode);
value=parse_code(keycode);
// printf ("\\tvalue=%d\\n",value);
if (value==-1) {
value = strtol(keycode, NULL, 0);
if (errno)
perror("value");
}
codes [0] = (unsigned) strtol(scancode, NULL, 0);
codes [1] = (unsigned) value;
// printf("\\t%04x=%04x\\n",codes[0], codes[1]);
if(ioctl(fd, EVIOCSKEYCODE, codes)) {
fprintf(stderr, "Setting scancode 0x%04x with 0x%04x via ",codes[0], codes[1]);
perror ("EVIOCSKEYCODE");
}
if(ioctl(fd, EVIOCGKEYCODE, codes)==0)
prtcode(codes);
}
return 0;
}
/* Get scancode table */
for (j = 0; j < 256; j++) {
for (i = 0; i < 256; i++) {
codes[0] = (j << 8) | i;
if (!ioctl(fd, EVIOCGKEYCODE, codes) && codes[1] != KEY_RESERVED)
prtcode(codes);
}
}
return 0;
}
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