blob: 11fc37ae9609f3496c871baf75079744f1a8fef7
| 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * setkeycodes |
| 4 | * |
| 5 | * Copyright (C) 1994-1998 Andries E. Brouwer <aeb@cwi.nl> |
| 6 | * |
| 7 | * Adjusted for BusyBox by Erik Andersen <andersen@codepoet.org> |
| 8 | * |
| 9 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| 10 | */ |
| 11 | //config:config SETKEYCODES |
| 12 | //config: bool "setkeycodes" |
| 13 | //config: default y |
| 14 | //config: select PLATFORM_LINUX |
| 15 | //config: help |
| 16 | //config: This program loads entries into the kernel's scancode-to-keycode |
| 17 | //config: map, allowing unusual keyboards to generate usable keycodes. |
| 18 | |
| 19 | //applet:IF_SETKEYCODES(APPLET(setkeycodes, BB_DIR_USR_BIN, BB_SUID_DROP)) |
| 20 | |
| 21 | //kbuild:lib-$(CONFIG_SETKEYCODES) += setkeycodes.o |
| 22 | |
| 23 | //usage:#define setkeycodes_trivial_usage |
| 24 | //usage: "SCANCODE KEYCODE..." |
| 25 | //usage:#define setkeycodes_full_usage "\n\n" |
| 26 | //usage: "Set entries into the kernel's scancode-to-keycode map,\n" |
| 27 | //usage: "allowing unusual keyboards to generate usable keycodes.\n\n" |
| 28 | //usage: "SCANCODE may be either xx or e0xx (hexadecimal),\n" |
| 29 | //usage: "and KEYCODE is given in decimal." |
| 30 | //usage: |
| 31 | //usage:#define setkeycodes_example_usage |
| 32 | //usage: "$ setkeycodes e030 127\n" |
| 33 | |
| 34 | #include "libbb.h" |
| 35 | |
| 36 | /* From <linux/kd.h> */ |
| 37 | struct kbkeycode { |
| 38 | unsigned scancode, keycode; |
| 39 | }; |
| 40 | enum { |
| 41 | KDSETKEYCODE = 0x4B4D /* write kernel keycode table entry */ |
| 42 | }; |
| 43 | |
| 44 | int setkeycodes_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 45 | int setkeycodes_main(int argc, char **argv) |
| 46 | { |
| 47 | int fd; |
| 48 | struct kbkeycode a; |
| 49 | |
| 50 | if (!(argc & 1) /* if even */ || argc < 2) { |
| 51 | bb_show_usage(); |
| 52 | } |
| 53 | |
| 54 | fd = get_console_fd_or_die(); |
| 55 | |
| 56 | while (argv[1]) { |
| 57 | int sc = xstrtoul_range(argv[1], 16, 0, 0xe07f); |
| 58 | if (sc >= 0xe000) { |
| 59 | sc -= 0xe000; |
| 60 | sc += 0x0080; |
| 61 | } |
| 62 | a.scancode = sc; |
| 63 | a.keycode = xatou_range(argv[2], 0, 255); |
| 64 | ioctl_or_perror_and_die(fd, KDSETKEYCODE, &a, |
| 65 | "can't set SCANCODE %x to KEYCODE %d", |
| 66 | sc, a.keycode); |
| 67 | argv += 2; |
| 68 | } |
| 69 | return EXIT_SUCCESS; |
| 70 | } |
| 71 |