src/setkeycodes.c

/*
 * call: setkeycode scancode keycode ...
 *  (where scancode is either xx or e0xx, given in hexadecimal,
 *   and keycode is given in decimal)
 *
 * aeb, 941108
 */
#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(char *s) {
    fprintf(stderr, "setkeycode: %s\n", s);
    fprintf(stderr, _(
"usage: setkeycode scancode keycode ...\n"
" (where scancode is either xx or e0xx, given in hexadecimal,\n"
"  and keycode is given in decimal)\n"));
    exit(1);
}

int
main(int argc, char **argv) {
    char *ep;
    int fd, sc;
    struct kbkeycode a;

    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 % 2 != 1)
      usage(_("even number of arguments expected"));
    fd = getfd(NULL);

    while (argc > 2) {
	a.keycode = atoi(argv[2]);
	a.scancode = sc = strtol(argv[1], &ep, 16);
	if (*ep)
	  usage(_("error reading scancode"));
	if (a.scancode > 127) {
	    a.scancode -= 0xe000;
	    a.scancode += 128;
	}
	if (a.scancode > 255 || a.keycode > 127)
	  usage(_("code outside bounds"));
	if (ioctl(fd,KDSETKEYCODE,&a)) {
	    perror("KDSETKEYCODE");
	    fprintf(stderr, _("failed to set scancode %x to keycode %d\n"),
		    sc, a.keycode);
	    exit(1);
	}
	argc -= 2;
	argv += 2;
    }
    return 0;
}