/* 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.
*/
+//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 the keyboard mode\n"
+//usage: "\n -a Default (ASCII)"
+//usage: "\n -k Medium-raw (keyboard)"
+//usage: "\n -s Raw (scancode)"
+//usage: "\n -u Unicode (utf-8)"
+//usage: "\n -C TTY Affect TTY instead of /dev/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, 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 = CURRENT_TTY;
- fd = get_console_fd();
- if (fd < 0) /* get_console_fd() already complained */
- return EXIT_FAILURE;
+ opt = getopt32(argv, "sakuC:", &tty_name);
+ fd = xopen_nonblocking(tty_name);
+ opt &= 0xf; /* clear -C bit, see (*) */
- 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)";
+ printf("The keyboard is in %s mode\n", mode);
+ } else {
+ /* here we depend on specific bits assigned to options (*) */
+ 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)