| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini kbd_mode implementation for busybox |
| * |
| * Copyright (C) 2007 Loic Grenie <loic.grenie@gmail.com> |
| * written using Andries Brouwer <aeb@cwi.nl>'s kbd_mode from |
| * console-utils v0.2.3, licensed under GNU GPLv2 |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| //config:config KBD_MODE |
| //config: bool "kbd_mode (4 kb)" |
| //config: default y |
| //config: select PLATFORM_LINUX |
| //config: help |
| //config: This program reports and sets keyboard mode. |
| |
| //applet:IF_KBD_MODE(APPLET_NOEXEC(kbd_mode, kbd_mode, BB_DIR_BIN, BB_SUID_DROP, kbd_mode)) |
| |
| //kbuild:lib-$(CONFIG_KBD_MODE) += kbd_mode.o |
| |
| //usage:#define kbd_mode_trivial_usage |
| //usage: "[-a|k|s|u] [-C TTY]" |
| //usage:#define kbd_mode_full_usage "\n\n" |
| //usage: "Report or set VT console keyboard mode\n" |
| //usage: "\n -a Default (ASCII)" |
| //usage: "\n -k Medium-raw (keycode)" |
| //usage: "\n -s Raw (scancode)" |
| //usage: "\n -u Unicode (utf-8)" |
| //usage: "\n -C TTY Affect TTY" |
| |
| #include "libbb.h" |
| #include <linux/kd.h> |
| |
| int kbd_mode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int kbd_mode_main(int argc UNUSED_PARAM, char **argv) |
| { |
| enum { |
| SCANCODE = (1 << 0), |
| ASCII = (1 << 1), |
| MEDIUMRAW = (1 << 2), |
| UNICODE = (1 << 3), |
| }; |
| int fd; |
| unsigned opt; |
| const char *tty_name; |
| |
| opt = getopt32(argv, "sakuC:", &tty_name); |
| if (opt & 0x10) { |
| opt &= 0xf; /* clear -C bit, see (*) */ |
| fd = xopen_nonblocking(tty_name); |
| } else { |
| /* kbd-2.0.3 tries in sequence: |
| * fd#0, /dev/tty, /dev/tty0. |
| * get_console_fd_or_die: /dev/console, /dev/tty0, /dev/tty. |
| * kbd-2.0.3 checks KDGKBTYPE, get_console_fd_or_die checks too. |
| */ |
| fd = get_console_fd_or_die(); |
| } |
| |
| if (!opt) { /* print current setting */ |
| const char *mode = "unknown"; |
| int m; |
| |
| xioctl(fd, KDGKBMODE, &m); |
| if (m == K_RAW) |
| mode = "raw (scancode)"; |
| else if (m == K_XLATE) |
| mode = "default (ASCII)"; |
| else if (m == K_MEDIUMRAW) |
| mode = "mediumraw (keycode)"; |
| else if (m == K_UNICODE) |
| mode = "Unicode (UTF-8)"; |
| else if (m == 4 /*K_OFF*/) /* kbd-2.0.3 does not show this mode, says "unknown" */ |
| mode = "off"; |
| printf("The keyboard is in %s mode\n", mode); |
| } else { |
| /* here we depend on specific bits assigned to options (*) |
| * KDSKBMODE constants have these values: |
| * #define K_RAW 0x00 |
| * #define K_XLATE 0x01 |
| * #define K_MEDIUMRAW 0x02 |
| * #define K_UNICODE 0x03 |
| * #define K_OFF 0x04 |
| * (looks like "-ak" together would cause the same effect as -u) |
| */ |
| opt = opt & UNICODE ? 3 : opt >> 1; |
| /* double cast prevents warnings about widening conversion */ |
| xioctl(fd, KDSKBMODE, (void*)(ptrdiff_t)opt); |
| } |
| |
| if (ENABLE_FEATURE_CLEAN_UP) |
| close(fd); |
| return EXIT_SUCCESS; |
| } |