1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini kbd_mode implementation for busybox
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4 | *
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5 | * Copyright (C) 2007 Loic Grenie <loic.grenie@gmail.com>
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6 | * written using Andries Brouwer <aeb@cwi.nl>'s kbd_mode from
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7 | * console-utils v0.2.3, licensed under GNU GPLv2
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8 | *
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9 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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10 | */
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11 |
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12 | //usage:#define kbd_mode_trivial_usage
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13 | //usage: "[-a|k|s|u] [-C TTY]"
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14 | //usage:#define kbd_mode_full_usage "\n\n"
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15 | //usage: "Report or set the keyboard mode\n"
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16 | //usage: "\n -a Default (ASCII)"
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17 | //usage: "\n -k Medium-raw (keyboard)"
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18 | //usage: "\n -s Raw (scancode)"
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19 | //usage: "\n -u Unicode (utf-8)"
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20 | //usage: "\n -C TTY Affect TTY instead of /dev/tty"
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21 |
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22 | #include "libbb.h"
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23 | #include <linux/kd.h>
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24 |
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25 | int kbd_mode_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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26 | int kbd_mode_main(int argc UNUSED_PARAM, char **argv)
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27 | {
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28 | enum {
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29 | SCANCODE = (1 << 0),
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30 | ASCII = (1 << 1),
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31 | MEDIUMRAW = (1 << 2),
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32 | UNICODE = (1 << 3),
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33 | };
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34 | int fd;
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35 | unsigned opt;
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36 | const char *tty_name = CURRENT_TTY;
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37 |
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38 | opt = getopt32(argv, "sakuC:", &tty_name);
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39 | fd = xopen_nonblocking(tty_name);
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40 | opt &= 0xf; /* clear -C bit, see (*) */
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41 |
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42 | if (!opt) { /* print current setting */
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43 | const char *mode = "unknown";
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44 | int m;
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45 |
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46 | xioctl(fd, KDGKBMODE, &m);
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47 | if (m == K_RAW)
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48 | mode = "raw (scancode)";
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49 | else if (m == K_XLATE)
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50 | mode = "default (ASCII)";
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51 | else if (m == K_MEDIUMRAW)
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52 | mode = "mediumraw (keycode)";
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53 | else if (m == K_UNICODE)
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54 | mode = "Unicode (UTF-8)";
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55 | printf("The keyboard is in %s mode\n", mode);
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56 | } else {
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57 | /* here we depend on specific bits assigned to options (*) */
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58 | opt = opt & UNICODE ? 3 : opt >> 1;
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59 | /* double cast prevents warnings about widening conversion */
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60 | xioctl(fd, KDSKBMODE, (void*)(ptrdiff_t)opt);
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61 | }
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62 |
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63 | if (ENABLE_FEATURE_CLEAN_UP)
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64 | close(fd);
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65 | return EXIT_SUCCESS;
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66 | }
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