minix/commands/loadkeys/loadkeys.c

   1 /*      loadkeys - load national keyboard map           Author: Marcus Hampel
   2  */
   3 #include <sys/types.h>
   4 #include <sys/ioctl.h>
   5 #include <minix/keymap.h>
   6 #include <fcntl.h>
   7 #include <unistd.h>
   8 #include <stdlib.h>
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <errno.h>
  12
  13 #define KBD_DEVICE      "/dev/console"
  14
  15 void fatal(char *say)
  16 {
  17   fprintf(stderr, "loadkeys: %s: %s\n", say, strerror(errno));
  18   exit(EXIT_FAILURE);
  19 }
  20
  21
  22 void usage(void)
  23 {
  24   fprintf(stderr, "usage: loadkeys <mapfile>\n");
  25   exit(EXIT_FAILURE);
  26 }
  27
  28
  29 int main(int argc, char *argv[])
  30 {
  31   char sig[4];
  32   keymap_t keymap;
  33   int fd;
  34
  35   if (argc != 2)
  36         usage();
  37
  38   if ((fd = open(argv[1], O_RDONLY)) < 0) fatal(argv[1]);
  39
  40   if (read(fd, sig, sizeof(sig)) < sizeof(sig)) fatal(argv[1]);
  41
  42   if (memcmp(sig, KEY_MAGIC, sizeof(sig)) != 0) {
  43         fprintf(stderr, "loadkeys: %s: not a keymap file\n", argv[1]);
  44         return EXIT_FAILURE;
  45   }
  46
  47   if (read(fd, keymap, sizeof(keymap)) < sizeof(keymap)) fatal(argv[1]);
  48
  49   close(fd);
  50
  51   if ((fd = open(KBD_DEVICE, O_WRONLY)) < 0) fatal(KBD_DEVICE);
  52
  53   if (ioctl(fd, KIOCSMAP, keymap) < 0) fatal(KBD_DEVICE);
  54
  55   return EXIT_SUCCESS;
  56 }