source: MondoRescue/branches/3.2/mindi-busybox/console-tools/setkeycodes.c@ 3232

/* vi: set sw=4 ts=4: */
/*
 * setkeycodes
 *
 * Copyright (C) 1994-1998 Andries E. Brouwer <aeb@cwi.nl>
 *
 * Adjusted for BusyBox by Erik Andersen <andersen@codepoet.org>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 */

//usage:#define setkeycodes_trivial_usage
//usage:       "SCANCODE KEYCODE..."
//usage:#define setkeycodes_full_usage "\n\n"
//usage:       "Set entries into the kernel's scancode-to-keycode map,\n"
//usage:       "allowing unusual keyboards to generate usable keycodes.\n\n"
//usage:       "SCANCODE may be either xx or e0xx (hexadecimal),\n"
//usage:       "and KEYCODE is given in decimal."
//usage:
//usage:#define setkeycodes_example_usage
//usage:       "$ setkeycodes e030 127\n"

#include "libbb.h"

/* From <linux/kd.h> */
struct kbkeycode {
    unsigned scancode, keycode;
};
enum {
    KDSETKEYCODE = 0x4B4D  /* write kernel keycode table entry */
};

int setkeycodes_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int setkeycodes_main(int argc, char **argv)
{
    int fd;
    struct kbkeycode a;

    if (!(argc & 1) /* if even */ || argc < 2) {
        bb_show_usage();
    }

    fd = get_console_fd_or_die();

    while (argv[1]) {
        int sc = xstrtoul_range(argv[1], 16, 0, 0xe07f);
        if (sc >= 0xe000) {
            sc -= 0xe000;
            sc += 0x0080;
        }
        a.scancode = sc;
        a.keycode = xatou_range(argv[2], 0, 255);
        ioctl_or_perror_and_die(fd, KDSETKEYCODE, &a,
            "can't set SCANCODE %x to KEYCODE %d",
            sc, a.keycode);
        argv += 2;
    }
    return EXIT_SUCCESS;
}