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/* 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.
*/
//config:config SETKEYCODES
//config: bool "setkeycodes (2.1 kb)"
//config: default y
//config: help
//config: This program loads entries into the kernel's scancode-to-keycode
//config: map, allowing unusual keyboards to generate usable keycodes.
//applet:IF_SETKEYCODES(APPLET_NOEXEC(setkeycodes, setkeycodes, BB_DIR_USR_BIN, BB_SUID_DROP, setkeycodes))
//kbuild:lib-$(CONFIG_SETKEYCODES) += setkeycodes.o
//usage:#define setkeycodes_trivial_usage
//usage: "{ SCANCODE KEYCODE }..."
//usage:#define setkeycodes_full_usage "\n\n"
//usage: "Modify kernel's scancode-to-keycode map,\n"
//usage: "allowing unusual keyboards to generate usable keycodes.\n\n"
//usage: "SCANCODE is either xx or e0xx (hexadecimal), KEYCODE is decimal."
//usage:
//usage:#define setkeycodes_example_usage
//usage: "$ 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;
if (!(argc & 1) /* if even */ || argc < 2) {
bb_show_usage();
}
fd = get_console_fd_or_die();
while (argv[1]) {
struct kbkeycode a;
int sc;
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;
}
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