blob: f1238c6b46bd035a5d22b237aa61aad3e0477570
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Mini kbd_mode implementation for busybox |
4 | * |
5 | * Copyright (C) 2007 Loic Grenie <loic.grenie@gmail.com> |
6 | * written using Andries Brouwer <aeb@cwi.nl>'s kbd_mode from |
7 | * console-utils v0.2.3, licensed under GNU GPLv2 |
8 | * |
9 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
10 | */ |
11 | //config:config KBD_MODE |
12 | //config: bool "kbd_mode" |
13 | //config: default y |
14 | //config: select PLATFORM_LINUX |
15 | //config: help |
16 | //config: This program reports and sets keyboard mode. |
17 | |
18 | //applet:IF_KBD_MODE(APPLET(kbd_mode, BB_DIR_BIN, BB_SUID_DROP)) |
19 | |
20 | //kbuild:lib-$(CONFIG_KBD_MODE) += kbd_mode.o |
21 | |
22 | //usage:#define kbd_mode_trivial_usage |
23 | //usage: "[-a|k|s|u] [-C TTY]" |
24 | //usage:#define kbd_mode_full_usage "\n\n" |
25 | //usage: "Report or set the keyboard mode\n" |
26 | //usage: "\n -a Default (ASCII)" |
27 | //usage: "\n -k Medium-raw (keyboard)" |
28 | //usage: "\n -s Raw (scancode)" |
29 | //usage: "\n -u Unicode (utf-8)" |
30 | //usage: "\n -C TTY Affect TTY instead of /dev/tty" |
31 | |
32 | #include "libbb.h" |
33 | #include <linux/kd.h> |
34 | |
35 | int kbd_mode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
36 | int kbd_mode_main(int argc UNUSED_PARAM, char **argv) |
37 | { |
38 | enum { |
39 | SCANCODE = (1 << 0), |
40 | ASCII = (1 << 1), |
41 | MEDIUMRAW = (1 << 2), |
42 | UNICODE = (1 << 3), |
43 | }; |
44 | int fd; |
45 | unsigned opt; |
46 | const char *tty_name = CURRENT_TTY; |
47 | |
48 | opt = getopt32(argv, "sakuC:", &tty_name); |
49 | fd = xopen_nonblocking(tty_name); |
50 | opt &= 0xf; /* clear -C bit, see (*) */ |
51 | |
52 | if (!opt) { /* print current setting */ |
53 | const char *mode = "unknown"; |
54 | int m; |
55 | |
56 | xioctl(fd, KDGKBMODE, &m); |
57 | if (m == K_RAW) |
58 | mode = "raw (scancode)"; |
59 | else if (m == K_XLATE) |
60 | mode = "default (ASCII)"; |
61 | else if (m == K_MEDIUMRAW) |
62 | mode = "mediumraw (keycode)"; |
63 | else if (m == K_UNICODE) |
64 | mode = "Unicode (UTF-8)"; |
65 | printf("The keyboard is in %s mode\n", mode); |
66 | } else { |
67 | /* here we depend on specific bits assigned to options (*) */ |
68 | opt = opt & UNICODE ? 3 : opt >> 1; |
69 | /* double cast prevents warnings about widening conversion */ |
70 | xioctl(fd, KDSKBMODE, (void*)(ptrdiff_t)opt); |
71 | } |
72 | |
73 | if (ENABLE_FEATURE_CLEAN_UP) |
74 | close(fd); |
75 | return EXIT_SUCCESS; |
76 | } |
77 |