* 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 tarball for details.
+ * 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>
{
enum {
SCANCODE = (1 << 0),
- ASCII = (1 << 1),
+ ASCII = (1 << 1),
MEDIUMRAW = (1 << 2),
- UNICODE = (1 << 3),
+ UNICODE = (1 << 3),
};
int fd;
unsigned opt;
- const char *tty_name = CURRENT_TTY;
+ const char *tty_name;
opt = getopt32(argv, "sakuC:", &tty_name);
- fd = xopen_nonblocking(tty_name);
- opt &= 0xf; /* clear -C bit, see (*) */
+ 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";
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 (*) */
+ /* 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);