/* vi: set sw=4 ts=4: */
/*
- * Mini loadkmap implementation for busybox
+ * Mini kbd_mode implementation for busybox
*
- * Copyright (C) 2007 Loïc Grenié <loic.grenie@gmail.com>
+ * 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 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 <getopt.h>
#include "libbb.h"
#include <linux/kd.h>
int kbd_mode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int kbd_mode_main(int argc, char **argv)
+int kbd_mode_main(int argc UNUSED_PARAM, char **argv)
{
- static const char opts[] = "saku";
-
- const char *opt = argv[1];
- const char *p;
+ enum {
+ SCANCODE = (1 << 0),
+ ASCII = (1 << 1),
+ MEDIUMRAW = (1 << 2),
+ UNICODE = (1 << 3),
+ };
int fd;
+ unsigned opt;
+ const char *tty_name;
- fd = get_console_fd();
- if (fd < 0) /* get_console_fd() already complained */
- return EXIT_FAILURE;
+ 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 == NULL) {
- /* No arg */
- const char *msg = "unknown";
- int mode;
+ if (!opt) { /* print current setting */
+ const char *mode = "unknown";
+ int m;
- ioctl(fd, KDGKBMODE, &mode);
- switch(mode) {
- case K_RAW:
- msg = "raw (scancode)";
- break;
- case K_XLATE:
- msg = "default (ASCII)";
- break;
- case K_MEDIUMRAW:
- msg = "mediumraw (keycode)";
- break;
- case K_UNICODE:
- msg = "Unicode (UTF-8)";
- break;
- }
- printf("The keyboard is in %s mode\n", msg);
- }
- else if (argc > 2 /* more than 1 arg */
- || *opt != '-' /* not an option */
- || (p = strchr(opts, opt[1])) == NULL /* not an option we expect */
- || opt[2] != '\0' /* more than one option char */
- ) {
- bb_show_usage();
- /* return EXIT_FAILURE; - not reached */
- }
- else {
-#if K_RAW != 0 || K_XLATE != 1 || K_MEDIUMRAW != 2 || K_UNICODE != 3
-#error kbd_mode must be changed
-#endif
- /* The options are in the order of the various K_xxx */
- ioctl(fd, KDSKBMODE, p - opts);
+ 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)