Logo Search packages:      
Sourcecode: kbd version File versions  Download package

getkeycodes.c

/*
 * call: getkeycodes
 *
 * aeb, 941108
 */
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <linux/kd.h>
#include "getfd.h"
#include "nls.h"
#include "version.h"

static void
usage(void) {
    fprintf(stderr, _("usage: getkeycodes\n"));
    exit(1);
}

int
main(int argc, char **argv) {
      int fd, sc, sc0;
      struct kbkeycode a;
      int old_kernel = 0;

      set_progname(argv[0]);

      setlocale(LC_ALL, "");
      bindtextdomain(PACKAGE, LOCALEDIR);
      textdomain(PACKAGE);

      if (argc == 2 && !strcmp(argv[1], "-V"))
            print_version_and_exit();

      if (argc != 1)
            usage();
      fd = getfd(NULL);

      /* Old kernels don't support changing scancodes below SC_LIM. */
      a.scancode = 0;
      a.keycode = 0;
      if (ioctl(fd, KDGETKEYCODE, &a)) {
            old_kernel = 1;
            sc0 = 89;
      } else
      for (sc0 = 1; sc0 <= 88; sc0++) {
            a.scancode = sc0;
            a.keycode = 0;
            if (ioctl(fd, KDGETKEYCODE, &a) || a.keycode != sc0)
                  break;
      }

      printf(_("Plain scancodes xx (hex) versus keycodes (dec)\n"));

      if (sc0 == 89) {
            printf(_("0 is an error; "
                   "for 1-88 (0x01-0x58) scancode equals keycode\n"));
      } else if (sc0 > 1) {
            printf(_("for 1-%d (0x01-0x%02x) scancode equals keycode\n"),
                   sc0 - 1, sc0 - 1);
      }

      for (sc = (sc0 & ~7); sc < 256; sc++) {
            if (sc == 128)
                  printf(_("\n\nEscaped scancodes e0 xx (hex)\n"));
            if (sc % 8 == 0) {
                  if (sc < 128)
                        printf("\n 0x%02x: ", sc);
                  else
                        printf("\ne0 %02x: ", sc-128);
            }

            if (sc < sc0) {
                  printf(" %3d", sc);
                  continue;
            }

            a.scancode = sc;
            a.keycode = 0;
            if (ioctl(fd, KDGETKEYCODE, &a) == 0) {
                  printf(" %3d", a.keycode);
                  continue;
            }
            if (errno == EINVAL) {
                  printf("   -");
                  continue;
            }
            perror("KDGETKEYCODE");
            fprintf(stderr,
                  _("failed to get keycode for scancode 0x%x\n"), sc);
            exit(1);
      }
      printf("\n");
      return 0;
}

Generated by  Doxygen 1.6.0   Back to index