Documentation/DocBook/v4l/keytable.c.xml

   1 <programlisting>
   2 /* keytable.c - This program allows checking/replacing keys at IR
   3
   4    Copyright (C) 2006-2009 Mauro Carvalho Chehab &lt;mchehab@infradead.org&gt;
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation, version 2 of the License.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14  */
  15
  16 #include &lt;ctype.h&gt;
  17 #include &lt;errno.h&gt;
  18 #include &lt;fcntl.h&gt;
  19 #include &lt;stdio.h&gt;
  20 #include &lt;stdlib.h&gt;
  21 #include &lt;string.h&gt;
  22 #include &lt;linux/input.h&gt;
  23 #include &lt;sys/ioctl.h&gt;
  24
  25 #include "parse.h"
  26
  27 void prtcode (int *codes)
  28 {
  29         struct parse_key *p;
  30
  31         for (p=keynames;p-&gt;name!=NULL;p++) {
  32                 if (p-&gt;value == (unsigned)codes[1]) {
  33                         printf("scancode 0x%04x = %s (0x%02x)\n", codes[0], p-&gt;name, codes[1]);
  34                         return;
  35                 }
  36         }
  37
  38         if (isprint (codes[1]))
  39                 printf("scancode %d = '%c' (0x%02x)\n", codes[0], codes[1], codes[1]);
  40         else
  41                 printf("scancode %d = 0x%02x\n", codes[0], codes[1]);
  42 }
  43
  44 int parse_code(char *string)
  45 {
  46         struct parse_key *p;
  47
  48         for (p=keynames;p-&gt;name!=NULL;p++) {
  49                 if (!strcasecmp(p-&gt;name, string)) {
  50                         return p-&gt;value;
  51                 }
  52         }
  53         return -1;
  54 }
  55
  56 int main (int argc, char *argv[])
  57 {
  58         int fd;
  59         unsigned int i, j;
  60         int codes[2];
  61
  62         if (argc&lt;2 || argc&gt;4) {
  63                 printf ("usage: %s &lt;device&gt; to get table; or\n"
  64                         "       %s &lt;device&gt; &lt;scancode&gt; &lt;keycode&gt;\n"
  65                         "       %s &lt;device&gt; &lt;keycode_file&gt;\n",*argv,*argv,*argv);
  66                 return -1;
  67         }
  68
  69         if ((fd = open(argv[1], O_RDONLY)) &lt; 0) {
  70                 perror("Couldn't open input device");
  71                 return(-1);
  72         }
  73
  74         if (argc==4) {
  75                 int value;
  76
  77                 value=parse_code(argv[3]);
  78
  79                 if (value==-1) {
  80                         value = strtol(argv[3], NULL, 0);
  81                         if (errno)
  82                                 perror("value");
  83                 }
  84
  85                 codes [0] = (unsigned) strtol(argv[2], NULL, 0);
  86                 codes [1] = (unsigned) value;
  87
  88                 if(ioctl(fd, EVIOCSKEYCODE, codes))
  89                         perror ("EVIOCSKEYCODE");
  90
  91                 if(ioctl(fd, EVIOCGKEYCODE, codes)==0)
  92                         prtcode(codes);
  93                 return 0;
  94         }
  95
  96         if (argc==3) {
  97                 FILE *fin;
  98                 int value;
  99                 char *scancode, *keycode, s[2048];
 100
 101                 fin=fopen(argv[2],"r");
 102                 if (fin==NULL) {
 103                         perror ("opening keycode file");
 104                         return -1;
 105                 }
 106
 107                 /* Clears old table */
 108                 for (j = 0; j &lt; 256; j++) {
 109                         for (i = 0; i &lt; 256; i++) {
 110                                 codes[0] = (j &lt;&lt; 8) | i;
 111                                 codes[1] = KEY_RESERVED;
 112                                 ioctl(fd, EVIOCSKEYCODE, codes);
 113                         }
 114                 }
 115
 116                 while (fgets(s,sizeof(s),fin)) {
 117                         scancode=strtok(s,"\n\t =:");
 118                         if (!scancode) {
 119                                 perror ("parsing input file scancode");
 120                                 return -1;
 121                         }
 122                         if (!strcasecmp(scancode, "scancode")) {
 123                                 scancode = strtok(NULL,"\n\t =:");
 124                                 if (!scancode) {
 125                                         perror ("parsing input file scancode");
 126                                         return -1;
 127                                 }
 128                         }
 129
 130                         keycode=strtok(NULL,"\n\t =:(");
 131                         if (!keycode) {
 132                                 perror ("parsing input file keycode");
 133                                 return -1;
 134                         }
 135
 136                         // printf ("parsing %s=%s:", scancode, keycode);
 137                         value=parse_code(keycode);
 138                         // printf ("\tvalue=%d\n",value);
 139
 140                         if (value==-1) {
 141                                 value = strtol(keycode, NULL, 0);
 142                                 if (errno)
 143                                         perror("value");
 144                         }
 145
 146                         codes [0] = (unsigned) strtol(scancode, NULL, 0);
 147                         codes [1] = (unsigned) value;
 148
 149                         // printf("\t%04x=%04x\n",codes[0], codes[1]);
 150                         if(ioctl(fd, EVIOCSKEYCODE, codes)) {
 151                                 fprintf(stderr, "Setting scancode 0x%04x with 0x%04x via ",codes[0], codes[1]);
 152                                 perror ("EVIOCSKEYCODE");
 153                         }
 154
 155                         if(ioctl(fd, EVIOCGKEYCODE, codes)==0)
 156                                 prtcode(codes);
 157                 }
 158                 return 0;
 159         }
 160
 161         /* Get scancode table */
 162         for (j = 0; j &lt; 256; j++) {
 163                 for (i = 0; i &lt; 256; i++) {
 164                         codes[0] = (j &lt;&lt; 8) | i;
 165                         if (!ioctl(fd, EVIOCGKEYCODE, codes) &amp;&amp; codes[1] != KEY_RESERVED)
 166                                 prtcode(codes);
 167                 }
 168         }
 169         return 0;
 170 }
 171
 172 </programlisting>