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/* 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 (4.1 kb)"
//config: default y
//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;
}
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