2
Simple DirectMedia Layer
3
Copyright (C) 1997-2013 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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#include "SDL_config.h"
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#ifdef SDL_INPUT_LINUXEV
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/* This is based on the linux joystick driver */
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/* References: https://www.kernel.org/doc/Documentation/input/input.txt
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* https://www.kernel.org/doc/Documentation/input/event-codes.txt
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* /usr/include/linux/input.h
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* The evtest application is also useful to debug the protocol
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#include "SDL_evdev.h"
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#define _THIS SDL_EVDEV_PrivateData *_this
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#include <sys/ioctl.h>
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#include <limits.h> /* For the definition of PATH_MAX */
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#include <linux/input.h>
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#ifdef SDL_INPUT_LINUXKD
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#include <linux/keyboard.h>
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/* We need this to prevent keystrokes from appear in the console */
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#define KDSKBMUTE 0x4B51
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#define KDSKBMODE 0x4B45
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#include "SDL_assert.h"
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#include "SDL_endian.h"
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#include "../../core/linux/SDL_udev.h"
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#include "SDL_scancode.h"
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#include "../../events/SDL_events_c.h"
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/* This isn't defined in older Linux kernel headers */
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static SDL_Scancode SDL_EVDEV_translate_keycode(int keycode);
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static void SDL_EVDEV_sync_device(SDL_evdevlist_item *item);
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static int SDL_EVDEV_device_removed(const char *devpath);
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static int SDL_EVDEV_device_added(const char *devpath);
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void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_type, int udev_class, const char *devpath);
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#endif /* SDL_USE_LIBUDEV */
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static SDL_Scancode EVDEV_Keycodes[] = {
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SDL_SCANCODE_UNKNOWN, /* KEY_RESERVED 0 */
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SDL_SCANCODE_ESCAPE, /* KEY_ESC 1 */
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SDL_SCANCODE_1, /* KEY_1 2 */
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SDL_SCANCODE_2, /* KEY_2 3 */
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SDL_SCANCODE_3, /* KEY_3 4 */
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SDL_SCANCODE_4, /* KEY_4 5 */
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SDL_SCANCODE_5, /* KEY_5 6 */
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SDL_SCANCODE_6, /* KEY_6 7 */
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SDL_SCANCODE_7, /* KEY_7 8 */
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SDL_SCANCODE_8, /* KEY_8 9 */
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SDL_SCANCODE_9, /* KEY_9 10 */
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SDL_SCANCODE_0, /* KEY_0 11 */
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SDL_SCANCODE_MINUS, /* KEY_MINUS 12 */
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SDL_SCANCODE_EQUALS, /* KEY_EQUAL 13 */
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SDL_SCANCODE_BACKSPACE, /* KEY_BACKSPACE 14 */
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SDL_SCANCODE_TAB, /* KEY_TAB 15 */
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SDL_SCANCODE_Q, /* KEY_Q 16 */
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SDL_SCANCODE_W, /* KEY_W 17 */
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SDL_SCANCODE_E, /* KEY_E 18 */
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SDL_SCANCODE_R, /* KEY_R 19 */
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SDL_SCANCODE_T, /* KEY_T 20 */
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SDL_SCANCODE_Y, /* KEY_Y 21 */
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SDL_SCANCODE_U, /* KEY_U 22 */
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SDL_SCANCODE_I, /* KEY_I 23 */
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SDL_SCANCODE_O, /* KEY_O 24 */
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SDL_SCANCODE_P, /* KEY_P 25 */
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SDL_SCANCODE_LEFTBRACKET, /* KEY_LEFTBRACE 26 */
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SDL_SCANCODE_RIGHTBRACKET, /* KEY_RIGHTBRACE 27 */
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SDL_SCANCODE_RETURN, /* KEY_ENTER 28 */
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SDL_SCANCODE_LCTRL, /* KEY_LEFTCTRL 29 */
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SDL_SCANCODE_A, /* KEY_A 30 */
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SDL_SCANCODE_S, /* KEY_S 31 */
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SDL_SCANCODE_D, /* KEY_D 32 */
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SDL_SCANCODE_F, /* KEY_F 33 */
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SDL_SCANCODE_G, /* KEY_G 34 */
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SDL_SCANCODE_H, /* KEY_H 35 */
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SDL_SCANCODE_J, /* KEY_J 36 */
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SDL_SCANCODE_K, /* KEY_K 37 */
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SDL_SCANCODE_L, /* KEY_L 38 */
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SDL_SCANCODE_SEMICOLON, /* KEY_SEMICOLON 39 */
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SDL_SCANCODE_APOSTROPHE, /* KEY_APOSTROPHE 40 */
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SDL_SCANCODE_GRAVE, /* KEY_GRAVE 41 */
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SDL_SCANCODE_LSHIFT, /* KEY_LEFTSHIFT 42 */
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SDL_SCANCODE_BACKSLASH, /* KEY_BACKSLASH 43 */
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SDL_SCANCODE_Z, /* KEY_Z 44 */
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SDL_SCANCODE_X, /* KEY_X 45 */
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SDL_SCANCODE_C, /* KEY_C 46 */
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SDL_SCANCODE_V, /* KEY_V 47 */
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SDL_SCANCODE_B, /* KEY_B 48 */
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SDL_SCANCODE_N, /* KEY_N 49 */
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SDL_SCANCODE_M, /* KEY_M 50 */
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SDL_SCANCODE_COMMA, /* KEY_COMMA 51 */
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SDL_SCANCODE_PERIOD, /* KEY_DOT 52 */
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SDL_SCANCODE_SLASH, /* KEY_SLASH 53 */
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SDL_SCANCODE_RSHIFT, /* KEY_RIGHTSHIFT 54 */
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SDL_SCANCODE_KP_MULTIPLY, /* KEY_KPASTERISK 55 */
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SDL_SCANCODE_LALT, /* KEY_LEFTALT 56 */
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SDL_SCANCODE_SPACE, /* KEY_SPACE 57 */
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SDL_SCANCODE_CAPSLOCK, /* KEY_CAPSLOCK 58 */
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SDL_SCANCODE_F1, /* KEY_F1 59 */
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SDL_SCANCODE_F2, /* KEY_F2 60 */
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SDL_SCANCODE_F3, /* KEY_F3 61 */
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SDL_SCANCODE_F4, /* KEY_F4 62 */
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SDL_SCANCODE_F5, /* KEY_F5 63 */
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SDL_SCANCODE_F6, /* KEY_F6 64 */
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SDL_SCANCODE_F7, /* KEY_F7 65 */
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SDL_SCANCODE_F8, /* KEY_F8 66 */
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SDL_SCANCODE_F9, /* KEY_F9 67 */
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SDL_SCANCODE_F10, /* KEY_F10 68 */
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SDL_SCANCODE_NUMLOCKCLEAR, /* KEY_NUMLOCK 69 */
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SDL_SCANCODE_SCROLLLOCK, /* KEY_SCROLLLOCK 70 */
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SDL_SCANCODE_KP_7, /* KEY_KP7 71 */
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SDL_SCANCODE_KP_8, /* KEY_KP8 72 */
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SDL_SCANCODE_KP_9, /* KEY_KP9 73 */
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SDL_SCANCODE_KP_MINUS, /* KEY_KPMINUS 74 */
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SDL_SCANCODE_KP_4, /* KEY_KP4 75 */
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SDL_SCANCODE_KP_5, /* KEY_KP5 76 */
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SDL_SCANCODE_KP_6, /* KEY_KP6 77 */
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SDL_SCANCODE_KP_PLUS, /* KEY_KPPLUS 78 */
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SDL_SCANCODE_KP_1, /* KEY_KP1 79 */
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SDL_SCANCODE_KP_2, /* KEY_KP2 80 */
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SDL_SCANCODE_KP_3, /* KEY_KP3 81 */
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SDL_SCANCODE_KP_0, /* KEY_KP0 82 */
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SDL_SCANCODE_KP_PERIOD, /* KEY_KPDOT 83 */
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SDL_SCANCODE_UNKNOWN, /* 84 */
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SDL_SCANCODE_LANG5, /* KEY_ZENKAKUHANKAKU 85 */
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SDL_SCANCODE_UNKNOWN, /* KEY_102ND 86 */
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SDL_SCANCODE_F11, /* KEY_F11 87 */
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SDL_SCANCODE_F12, /* KEY_F12 88 */
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SDL_SCANCODE_UNKNOWN, /* KEY_RO 89 */
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SDL_SCANCODE_LANG3, /* KEY_KATAKANA 90 */
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SDL_SCANCODE_LANG4, /* KEY_HIRAGANA 91 */
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SDL_SCANCODE_UNKNOWN, /* KEY_HENKAN 92 */
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SDL_SCANCODE_LANG3, /* KEY_KATAKANAHIRAGANA 93 */
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SDL_SCANCODE_UNKNOWN, /* KEY_MUHENKAN 94 */
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SDL_SCANCODE_KP_COMMA, /* KEY_KPJPCOMMA 95 */
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SDL_SCANCODE_KP_ENTER, /* KEY_KPENTER 96 */
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SDL_SCANCODE_RCTRL, /* KEY_RIGHTCTRL 97 */
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SDL_SCANCODE_KP_DIVIDE, /* KEY_KPSLASH 98 */
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SDL_SCANCODE_SYSREQ, /* KEY_SYSRQ 99 */
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SDL_SCANCODE_RALT, /* KEY_RIGHTALT 100 */
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SDL_SCANCODE_UNKNOWN, /* KEY_LINEFEED 101 */
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SDL_SCANCODE_HOME, /* KEY_HOME 102 */
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SDL_SCANCODE_UP, /* KEY_UP 103 */
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SDL_SCANCODE_PAGEUP, /* KEY_PAGEUP 104 */
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SDL_SCANCODE_LEFT, /* KEY_LEFT 105 */
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SDL_SCANCODE_RIGHT, /* KEY_RIGHT 106 */
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SDL_SCANCODE_END, /* KEY_END 107 */
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SDL_SCANCODE_DOWN, /* KEY_DOWN 108 */
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SDL_SCANCODE_PAGEDOWN, /* KEY_PAGEDOWN 109 */
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SDL_SCANCODE_INSERT, /* KEY_INSERT 110 */
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SDL_SCANCODE_DELETE, /* KEY_DELETE 111 */
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SDL_SCANCODE_UNKNOWN, /* KEY_MACRO 112 */
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SDL_SCANCODE_MUTE, /* KEY_MUTE 113 */
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SDL_SCANCODE_VOLUMEDOWN, /* KEY_VOLUMEDOWN 114 */
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SDL_SCANCODE_VOLUMEUP, /* KEY_VOLUMEUP 115 */
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SDL_SCANCODE_POWER, /* KEY_POWER 116 SC System Power Down */
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SDL_SCANCODE_KP_EQUALS, /* KEY_KPEQUAL 117 */
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SDL_SCANCODE_KP_MINUS, /* KEY_KPPLUSMINUS 118 */
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SDL_SCANCODE_PAUSE, /* KEY_PAUSE 119 */
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SDL_SCANCODE_UNKNOWN, /* KEY_SCALE 120 AL Compiz Scale (Expose) */
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SDL_SCANCODE_KP_COMMA, /* KEY_KPCOMMA 121 */
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SDL_SCANCODE_LANG1, /* KEY_HANGEUL,KEY_HANGUEL 122 */
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SDL_SCANCODE_LANG2, /* KEY_HANJA 123 */
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SDL_SCANCODE_INTERNATIONAL3,/* KEY_YEN 124 */
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SDL_SCANCODE_LGUI, /* KEY_LEFTMETA 125 */
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SDL_SCANCODE_RGUI, /* KEY_RIGHTMETA 126 */
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SDL_SCANCODE_APPLICATION, /* KEY_COMPOSE 127 */
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SDL_SCANCODE_STOP, /* KEY_STOP 128 AC Stop */
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SDL_SCANCODE_AGAIN, /* KEY_AGAIN 129 */
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SDL_SCANCODE_UNKNOWN, /* KEY_PROPS 130 AC Properties */
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SDL_SCANCODE_UNDO, /* KEY_UNDO 131 AC Undo */
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SDL_SCANCODE_UNKNOWN, /* KEY_FRONT 132 */
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SDL_SCANCODE_COPY, /* KEY_COPY 133 AC Copy */
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SDL_SCANCODE_UNKNOWN, /* KEY_OPEN 134 AC Open */
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SDL_SCANCODE_PASTE, /* KEY_PASTE 135 AC Paste */
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SDL_SCANCODE_FIND, /* KEY_FIND 136 AC Search */
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SDL_SCANCODE_CUT, /* KEY_CUT 137 AC Cut */
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SDL_SCANCODE_HELP, /* KEY_HELP 138 AL Integrated Help Center */
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SDL_SCANCODE_MENU, /* KEY_MENU 139 Menu (show menu) */
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SDL_SCANCODE_CALCULATOR, /* KEY_CALC 140 AL Calculator */
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SDL_SCANCODE_UNKNOWN, /* KEY_SETUP 141 */
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SDL_SCANCODE_SLEEP, /* KEY_SLEEP 142 SC System Sleep */
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SDL_SCANCODE_UNKNOWN, /* KEY_WAKEUP 143 System Wake Up */
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SDL_SCANCODE_UNKNOWN, /* KEY_FILE 144 AL Local Machine Browser */
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SDL_SCANCODE_UNKNOWN, /* KEY_SENDFILE 145 */
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SDL_SCANCODE_UNKNOWN, /* KEY_DELETEFILE 146 */
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SDL_SCANCODE_UNKNOWN, /* KEY_XFER 147 */
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SDL_SCANCODE_APP1, /* KEY_PROG1 148 */
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SDL_SCANCODE_APP1, /* KEY_PROG2 149 */
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SDL_SCANCODE_WWW, /* KEY_WWW 150 AL Internet Browser */
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SDL_SCANCODE_UNKNOWN, /* KEY_MSDOS 151 */
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SDL_SCANCODE_UNKNOWN, /* KEY_COFFEE,KEY_SCREENLOCK 152 AL Terminal Lock/Screensaver */
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SDL_SCANCODE_UNKNOWN, /* KEY_DIRECTION 153 */
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SDL_SCANCODE_UNKNOWN, /* KEY_CYCLEWINDOWS 154 */
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SDL_SCANCODE_MAIL, /* KEY_MAIL 155 */
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SDL_SCANCODE_AC_BOOKMARKS, /* KEY_BOOKMARKS 156 AC Bookmarks */
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SDL_SCANCODE_COMPUTER, /* KEY_COMPUTER 157 */
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SDL_SCANCODE_AC_BACK, /* KEY_BACK 158 AC Back */
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SDL_SCANCODE_AC_FORWARD, /* KEY_FORWARD 159 AC Forward */
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SDL_SCANCODE_UNKNOWN, /* KEY_CLOSECD 160 */
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SDL_SCANCODE_EJECT, /* KEY_EJECTCD 161 */
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SDL_SCANCODE_UNKNOWN, /* KEY_EJECTCLOSECD 162 */
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SDL_SCANCODE_AUDIONEXT, /* KEY_NEXTSONG 163 */
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SDL_SCANCODE_AUDIOPLAY, /* KEY_PLAYPAUSE 164 */
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SDL_SCANCODE_AUDIOPREV, /* KEY_PREVIOUSSONG 165 */
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SDL_SCANCODE_AUDIOSTOP, /* KEY_STOPCD 166 */
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SDL_SCANCODE_UNKNOWN, /* KEY_RECORD 167 */
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SDL_SCANCODE_UNKNOWN, /* KEY_REWIND 168 */
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SDL_SCANCODE_UNKNOWN, /* KEY_PHONE 169 Media Select Telephone */
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SDL_SCANCODE_UNKNOWN, /* KEY_ISO 170 */
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SDL_SCANCODE_UNKNOWN, /* KEY_CONFIG 171 AL Consumer Control Configuration */
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SDL_SCANCODE_AC_HOME, /* KEY_HOMEPAGE 172 AC Home */
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SDL_SCANCODE_AC_REFRESH, /* KEY_REFRESH 173 AC Refresh */
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SDL_SCANCODE_UNKNOWN, /* KEY_EXIT 174 AC Exit */
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SDL_SCANCODE_UNKNOWN, /* KEY_MOVE 175 */
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SDL_SCANCODE_UNKNOWN, /* KEY_EDIT 176 */
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SDL_SCANCODE_UNKNOWN, /* KEY_SCROLLUP 177 */
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SDL_SCANCODE_UNKNOWN, /* KEY_SCROLLDOWN 178 */
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SDL_SCANCODE_KP_LEFTPAREN, /* KEY_KPLEFTPAREN 179 */
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SDL_SCANCODE_KP_RIGHTPAREN, /* KEY_KPRIGHTPAREN 180 */
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SDL_SCANCODE_UNKNOWN, /* KEY_NEW 181 AC New */
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SDL_SCANCODE_AGAIN, /* KEY_REDO 182 AC Redo/Repeat */
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SDL_SCANCODE_F13, /* KEY_F13 183 */
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SDL_SCANCODE_F14, /* KEY_F14 184 */
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SDL_SCANCODE_F15, /* KEY_F15 185 */
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SDL_SCANCODE_F16, /* KEY_F16 186 */
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SDL_SCANCODE_F17, /* KEY_F17 187 */
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SDL_SCANCODE_F18, /* KEY_F18 188 */
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SDL_SCANCODE_F19, /* KEY_F19 189 */
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SDL_SCANCODE_F20, /* KEY_F20 190 */
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SDL_SCANCODE_F21, /* KEY_F21 191 */
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SDL_SCANCODE_F22, /* KEY_F22 192 */
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SDL_SCANCODE_F23, /* KEY_F23 193 */
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SDL_SCANCODE_F24, /* KEY_F24 194 */
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SDL_SCANCODE_UNKNOWN, /* 195 */
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SDL_SCANCODE_UNKNOWN, /* 196 */
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SDL_SCANCODE_UNKNOWN, /* 197 */
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SDL_SCANCODE_UNKNOWN, /* 198 */
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SDL_SCANCODE_UNKNOWN, /* 199 */
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SDL_SCANCODE_UNKNOWN, /* KEY_PLAYCD 200 */
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SDL_SCANCODE_UNKNOWN, /* KEY_PAUSECD 201 */
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SDL_SCANCODE_UNKNOWN, /* KEY_PROG3 202 */
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SDL_SCANCODE_UNKNOWN, /* KEY_PROG4 203 */
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SDL_SCANCODE_UNKNOWN, /* KEY_DASHBOARD 204 AL Dashboard */
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SDL_SCANCODE_UNKNOWN, /* KEY_SUSPEND 205 */
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SDL_SCANCODE_UNKNOWN, /* KEY_CLOSE 206 AC Close */
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SDL_SCANCODE_UNKNOWN, /* KEY_PLAY 207 */
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SDL_SCANCODE_UNKNOWN, /* KEY_FASTFORWARD 208 */
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SDL_SCANCODE_UNKNOWN, /* KEY_BASSBOOST 209 */
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SDL_SCANCODE_UNKNOWN, /* KEY_PRINT 210 AC Print */
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SDL_SCANCODE_UNKNOWN, /* KEY_HP 211 */
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SDL_SCANCODE_UNKNOWN, /* KEY_CAMERA 212 */
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SDL_SCANCODE_UNKNOWN, /* KEY_SOUND 213 */
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SDL_SCANCODE_UNKNOWN, /* KEY_QUESTION 214 */
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SDL_SCANCODE_UNKNOWN, /* KEY_EMAIL 215 */
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SDL_SCANCODE_UNKNOWN, /* KEY_CHAT 216 */
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SDL_SCANCODE_UNKNOWN, /* KEY_SEARCH 217 */
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SDL_SCANCODE_UNKNOWN, /* KEY_CONNECT 218 */
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SDL_SCANCODE_UNKNOWN, /* KEY_FINANCE 219 AL Checkbook/Finance */
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SDL_SCANCODE_UNKNOWN, /* KEY_SPORT 220 */
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SDL_SCANCODE_UNKNOWN, /* KEY_SHOP 221 */
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SDL_SCANCODE_UNKNOWN, /* KEY_ALTERASE 222 */
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SDL_SCANCODE_UNKNOWN, /* KEY_CANCEL 223 AC Cancel */
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SDL_SCANCODE_UNKNOWN, /* KEY_BRIGHTNESSDOWN 224 */
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SDL_SCANCODE_UNKNOWN, /* KEY_BRIGHTNESSUP 225 */
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SDL_SCANCODE_UNKNOWN, /* KEY_MEDIA 226 */
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SDL_SCANCODE_UNKNOWN, /* KEY_SWITCHVIDEOMODE 227 Cycle between available video outputs (Monitor/LCD/TV-out/etc) */
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SDL_SCANCODE_UNKNOWN, /* KEY_KBDILLUMTOGGLE 228 */
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SDL_SCANCODE_UNKNOWN, /* KEY_KBDILLUMDOWN 229 */
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SDL_SCANCODE_UNKNOWN, /* KEY_KBDILLUMUP 230 */
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SDL_SCANCODE_UNKNOWN, /* KEY_SEND 231 AC Send */
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SDL_SCANCODE_UNKNOWN, /* KEY_REPLY 232 AC Reply */
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SDL_SCANCODE_UNKNOWN, /* KEY_FORWARDMAIL 233 AC Forward Msg */
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SDL_SCANCODE_UNKNOWN, /* KEY_SAVE 234 AC Save */
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SDL_SCANCODE_UNKNOWN, /* KEY_DOCUMENTS 235 */
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SDL_SCANCODE_UNKNOWN, /* KEY_BATTERY 236 */
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SDL_SCANCODE_UNKNOWN, /* KEY_BLUETOOTH 237 */
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SDL_SCANCODE_UNKNOWN, /* KEY_WLAN 238 */
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SDL_SCANCODE_UNKNOWN, /* KEY_UWB 239 */
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SDL_SCANCODE_UNKNOWN, /* KEY_UNKNOWN 240 */
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SDL_SCANCODE_UNKNOWN, /* KEY_VIDEO_NEXT 241 drive next video source */
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SDL_SCANCODE_UNKNOWN, /* KEY_VIDEO_PREV 242 drive previous video source */
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SDL_SCANCODE_UNKNOWN, /* KEY_BRIGHTNESS_CYCLE 243 brightness up, after max is min */
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SDL_SCANCODE_UNKNOWN, /* KEY_BRIGHTNESS_ZERO 244 brightness off, use ambient */
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SDL_SCANCODE_UNKNOWN, /* KEY_DISPLAY_OFF 245 display device to off state */
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SDL_SCANCODE_UNKNOWN, /* KEY_WIMAX 246 */
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SDL_SCANCODE_UNKNOWN, /* KEY_RFKILL 247 Key that controls all radios */
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SDL_SCANCODE_UNKNOWN, /* KEY_MICMUTE 248 Mute / unmute the microphone */
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static Uint8 EVDEV_MouseButtons[] = {
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SDL_BUTTON_LEFT, /* BTN_LEFT 0x110 */
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SDL_BUTTON_RIGHT, /* BTN_RIGHT 0x111 */
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SDL_BUTTON_MIDDLE, /* BTN_MIDDLE 0x112 */
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SDL_BUTTON_X1, /* BTN_SIDE 0x113 */
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SDL_BUTTON_X2, /* BTN_EXTRA 0x114 */
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SDL_BUTTON_X2 + 1, /* BTN_FORWARD 0x115 */
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SDL_BUTTON_X2 + 2, /* BTN_BACK 0x116 */
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SDL_BUTTON_X2 + 3 /* BTN_TASK 0x117 */
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static char* EVDEV_consoles[] = {
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#define IS_CONSOLE(fd) isatty (fd) && ioctl(fd, KDGKBTYPE, &arg) == 0 && ((arg == KB_101) || (arg == KB_84))
360
static int SDL_EVDEV_get_console_fd(void)
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/* Try a few consoles to see which one we have read access to */
367
for( i = 0; i < SDL_arraysize(EVDEV_consoles); i++) {
368
fd = open(EVDEV_consoles[i], O_RDONLY);
370
if (IS_CONSOLE(fd)) return fd;
375
/* Try stdin, stdout, stderr */
377
for( fd = 0; fd < 3; fd++) {
378
if (IS_CONSOLE(fd)) return fd;
381
/* We won't be able to send SDL_TEXTINPUT events */
385
/* Prevent keystrokes from reaching the tty */
386
static int SDL_EVDEV_mute_keyboard(int tty, int *kb_mode)
390
*kb_mode = 0; /* FIXME: Is this a sane default in case KDGKBMODE fails? */
391
if (!IS_CONSOLE(tty)) {
392
return SDL_SetError("Tried to mute an invalid tty");
394
ioctl(tty, KDGKBMODE, kb_mode); /* It's not fatal if this fails */
395
if (ioctl(tty, KDSKBMUTE, 1) && ioctl(tty, KDSKBMODE, K_OFF)) {
396
return SDL_SetError("EVDEV: Failed muting keyboard");
402
/* Restore the keyboard mode for given tty */
403
static void SDL_EVDEV_unmute_keyboard(int tty, int kb_mode)
405
if (ioctl(tty, KDSKBMUTE, 0) && ioctl(tty, KDSKBMODE, kb_mode)) {
406
SDL_Log("EVDEV: Failed restoring keyboard mode");
410
/* Read /sys/class/tty/tty0/active and open the tty */
411
static int SDL_EVDEV_get_active_tty()
414
char ttyname[NAME_MAX + 1];
415
char ttypath[PATH_MAX+1] = "/dev/";
418
fd = open("/sys/class/tty/tty0/active", O_RDONLY);
420
return SDL_SetError("Could not determine which tty is active");
423
len = read(fd, ttyname, NAME_MAX);
427
return SDL_SetError("Could not read which tty is active");
430
if (ttyname[len-1] == '\n') {
431
ttyname[len-1] = '\0';
437
SDL_strlcat(ttypath, ttyname, PATH_MAX);
438
fd = open(ttypath, O_RDWR | O_NOCTTY);
440
return SDL_SetError("Could not open tty: %s", ttypath);
443
if (!IS_CONSOLE(fd)) {
445
return SDL_SetError("Invalid tty obtained: %s", ttypath);
458
_this = (SDL_EVDEV_PrivateData *) SDL_calloc(1, sizeof(*_this));
460
return SDL_OutOfMemory();
464
if (SDL_UDEV_Init() < 0) {
470
/* Set up the udev callback */
471
if ( SDL_UDEV_AddCallback(SDL_EVDEV_udev_callback) < 0) {
476
/* Force a scan to build the initial device list */
479
/* TODO: Scan the devices manually, like a caveman */
480
#endif /* SDL_USE_LIBUDEV */
482
/* We need a physical terminal (not PTS) to be able to translate key code to symbols via the kernel tables */
483
_this->console_fd = SDL_EVDEV_get_console_fd();
485
/* Mute the keyboard so keystrokes only generate evdev events and do not leak through to the console */
486
_this->tty = STDIN_FILENO;
487
if (SDL_EVDEV_mute_keyboard(_this->tty, &_this->kb_mode) < 0) {
488
/* stdin is not a tty, probably we were launched remotely, so we try to disable the active tty */
489
_this->tty = SDL_EVDEV_get_active_tty();
490
if (_this->tty >= 0) {
491
if (SDL_EVDEV_mute_keyboard(_this->tty, &_this->kb_mode) < 0) {
499
_this->ref_count += 1;
511
_this->ref_count -= 1;
513
if (_this->ref_count < 1) {
516
SDL_UDEV_DelCallback(SDL_EVDEV_udev_callback);
518
#endif /* SDL_USE_LIBUDEV */
520
if (_this->console_fd >= 0) {
521
close(_this->console_fd);
524
if (_this->tty >= 0) {
525
SDL_EVDEV_unmute_keyboard(_this->tty, _this->kb_mode);
529
/* Remove existing devices */
530
while(_this->first != NULL) {
531
SDL_EVDEV_device_removed(_this->first->path);
534
SDL_assert(_this->first == NULL);
535
SDL_assert(_this->last == NULL);
536
SDL_assert(_this->numdevices == 0);
544
void SDL_EVDEV_udev_callback(SDL_UDEV_deviceevent udev_type, int udev_class, const char *devpath)
546
if (devpath == NULL) {
550
if (!(udev_class & (SDL_UDEV_DEVICE_MOUSE|SDL_UDEV_DEVICE_KEYBOARD))) {
554
switch( udev_type ) {
555
case SDL_UDEV_DEVICEADDED:
556
SDL_EVDEV_device_added(devpath);
559
case SDL_UDEV_DEVICEREMOVED:
560
SDL_EVDEV_device_removed(devpath);
568
#endif /* SDL_USE_LIBUDEV */
573
struct input_event events[32];
575
SDL_evdevlist_item *item;
576
SDL_Scancode scan_code;
579
#ifdef SDL_INPUT_LINUXKD
582
static char keysym[8];
591
mouse = SDL_GetMouse();
593
for (item = _this->first; item != NULL; item = item->next) {
594
while ((len = read(item->fd, events, (sizeof events))) > 0) {
595
len /= sizeof(events[0]);
596
for (i = 0; i < len; ++i) {
597
switch (events[i].type) {
599
if (events[i].code >= BTN_MOUSE && events[i].code < BTN_MOUSE + SDL_arraysize(EVDEV_MouseButtons)) {
600
mouse_button = events[i].code - BTN_MOUSE;
601
if (events[i].value == 0) {
602
SDL_SendMouseButton(mouse->focus, mouse->mouseID, SDL_RELEASED, EVDEV_MouseButtons[mouse_button]);
603
} else if (events[i].value == 1) {
604
SDL_SendMouseButton(mouse->focus, mouse->mouseID, SDL_PRESSED, EVDEV_MouseButtons[mouse_button]);
609
/* Probably keyboard */
610
scan_code = SDL_EVDEV_translate_keycode(events[i].code);
611
if (scan_code != SDL_SCANCODE_UNKNOWN) {
612
if (events[i].value == 0) {
613
SDL_SendKeyboardKey(SDL_RELEASED, scan_code);
614
} else if (events[i].value == 1 || events[i].value == 2 /* Key repeated */ ) {
615
SDL_SendKeyboardKey(SDL_PRESSED, scan_code);
616
#ifdef SDL_INPUT_LINUXKD
617
if (_this->console_fd >= 0) {
618
kbe.kb_index = events[i].code;
619
/* Convert the key to an UTF-8 char */
620
/* Ref: http://www.linuxjournal.com/article/2783 */
621
modstate = SDL_GetModState();
624
/* Ref: http://graphics.stanford.edu/~seander/bithacks.html#ConditionalSetOrClearBitsWithoutBranching */
625
kbe.kb_table |= -( (modstate & KMOD_LCTRL) != 0) & (1 << KG_CTRLL | 1 << KG_CTRL);
626
kbe.kb_table |= -( (modstate & KMOD_RCTRL) != 0) & (1 << KG_CTRLR | 1 << KG_CTRL);
627
kbe.kb_table |= -( (modstate & KMOD_LSHIFT) != 0) & (1 << KG_SHIFTL | 1 << KG_SHIFT);
628
kbe.kb_table |= -( (modstate & KMOD_RSHIFT) != 0) & (1 << KG_SHIFTR | 1 << KG_SHIFT);
629
kbe.kb_table |= -( (modstate & KMOD_LALT) != 0) & (1 << KG_ALT);
630
kbe.kb_table |= -( (modstate & KMOD_RALT) != 0) & (1 << KG_ALTGR);
632
if (ioctl(_this->console_fd, KDGKBENT, (unsigned long)&kbe) == 0 &&
633
((KTYP(kbe.kb_value) == KT_LATIN) || (KTYP(kbe.kb_value) == KT_ASCII) || (KTYP(kbe.kb_value) == KT_LETTER)))
635
kval = KVAL(kbe.kb_value);
637
/* While there's a KG_CAPSSHIFT symbol, it's not useful to build the table index with it
638
* because 1 << KG_CAPSSHIFT overflows the 8 bits of kb_table
639
* So, we do the CAPS LOCK logic here. Note that isalpha depends on the locale!
641
if ( modstate & KMOD_CAPS && isalpha(kval) ) {
642
if ( isupper(kval) ) {
643
kval = tolower(kval);
645
kval = toupper(kval);
649
/* Convert to UTF-8 and send */
650
end = SDL_UCS4ToUTF8( kval, keysym);
652
SDL_SendKeyboardText(keysym);
655
#endif /* SDL_INPUT_LINUXKD */
660
switch(events[i].code) {
662
SDL_SendMouseMotion(mouse->focus, mouse->mouseID, SDL_FALSE, events[i].value, mouse->y);
665
SDL_SendMouseMotion(mouse->focus, mouse->mouseID, SDL_FALSE, mouse->x, events[i].value);
672
switch(events[i].code) {
674
SDL_SendMouseMotion(mouse->focus, mouse->mouseID, SDL_TRUE, events[i].value, 0);
677
SDL_SendMouseMotion(mouse->focus, mouse->mouseID, SDL_TRUE, 0, events[i].value);
680
SDL_SendMouseWheel(mouse->focus, mouse->mouseID, 0, events[i].value);
683
SDL_SendMouseWheel(mouse->focus, mouse->mouseID, events[i].value, 0);
690
switch (events[i].code) {
692
SDL_EVDEV_sync_device(item);
705
SDL_EVDEV_translate_keycode(int keycode)
707
SDL_Scancode scancode = SDL_SCANCODE_UNKNOWN;
709
if (keycode < SDL_arraysize(EVDEV_Keycodes)) {
710
scancode = EVDEV_Keycodes[keycode];
712
if (scancode == SDL_SCANCODE_UNKNOWN) {
713
SDL_Log("The key you just pressed is not recognized by SDL. To help get this fixed, please report this to the SDL mailing list <sdl@libsdl.org> EVDEV KeyCode %d \n", keycode);
719
SDL_EVDEV_sync_device(SDL_evdevlist_item *item)
721
/* TODO: get full state of device and report whatever is required */
726
SDL_EVDEV_device_added(const char *devpath)
728
SDL_evdevlist_item *item;
730
/* Check to make sure it's not already in list. */
731
for (item = _this->first; item != NULL; item = item->next) {
732
if (strcmp(devpath, item->path) == 0) {
733
return -1; /* already have this one */
737
item = (SDL_evdevlist_item *) SDL_calloc(1, sizeof (SDL_evdevlist_item));
739
return SDL_OutOfMemory();
742
item->fd = open(devpath, O_RDONLY, 0);
745
return SDL_SetError("Unable to open %s", devpath);
748
item->path = SDL_strdup(devpath);
749
if (item->path == NULL) {
752
return SDL_OutOfMemory();
755
/* Non blocking read mode */
756
fcntl(item->fd, F_SETFL, O_NONBLOCK);
758
if (_this->last == NULL) {
759
_this->first = _this->last = item;
761
_this->last->next = item;
765
SDL_EVDEV_sync_device(item);
767
return _this->numdevices++;
769
#endif /* SDL_USE_LIBUDEV */
772
SDL_EVDEV_device_removed(const char *devpath)
774
SDL_evdevlist_item *item;
775
SDL_evdevlist_item *prev = NULL;
777
for (item = _this->first; item != NULL; item = item->next) {
778
/* found it, remove it. */
779
if ( strcmp(devpath, item->path) ==0 ) {
781
prev->next = item->next;
783
SDL_assert(_this->first == item);
784
_this->first = item->next;
786
if (item == _this->last) {
790
SDL_free(item->path);
802
#endif /* SDL_INPUT_LINUXEV */
804
/* vi: set ts=4 sw=4 expandtab: */
added
removed
src/input/evdev/SDL_evdev.c
