/* 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; }