| /* 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; |
| } |