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/*
Simple DirectMedia Layer
2016-01-02 19:10:34 +01:00
Copyright ( C ) 1997 - 2016 Sam Lantinga < slouken @ libsdl . org >
2015-06-21 17:33:46 +02:00
This software is provided ' as - is ' , without any express or implied
warranty . In no event will the authors be held liable for any damages
arising from the use of this software .
Permission is granted to anyone to use this software for any purpose ,
including commercial applications , and to alter it and redistribute it
freely , subject to the following restrictions :
1. The origin of this software must not be misrepresented ; you must not
claim that you wrote the original software . If you use this software
in a product , an acknowledgment in the product documentation would be
appreciated but is not required .
2. Altered source versions must be plainly marked as such , and must not be
misrepresented as being the original software .
3. This notice may not be removed or altered from any source distribution .
*/
# include "../../SDL_internal.h"
# ifdef SDL_INPUT_LINUXEV
/* This is based on the linux joystick driver */
/* References: https://www.kernel.org/doc/Documentation/input/input.txt
* https : //www.kernel.org/doc/Documentation/input/event-codes.txt
* / usr / include / linux / input . h
* The evtest application is also useful to debug the protocol
*/
# include "SDL_evdev.h"
# define _THIS SDL_EVDEV_PrivateData *_this
static _THIS = NULL ;
# include <sys/stat.h>
# include <unistd.h>
# include <fcntl.h>
# include <sys/ioctl.h>
# include <limits.h> /* For the definition of PATH_MAX */
# include <linux/input.h>
# ifdef SDL_INPUT_LINUXKD
# include <linux/kd.h>
# include <linux/keyboard.h>
# endif
/* We need this to prevent keystrokes from appear in the console */
# ifndef KDSKBMUTE
# define KDSKBMUTE 0x4B51
# endif
# ifndef KDSKBMODE
# define KDSKBMODE 0x4B45
# endif
# ifndef K_OFF
# define K_OFF 0x04
# endif
# include "SDL.h"
# include "SDL_assert.h"
# include "SDL_endian.h"
# include "../../core/linux/SDL_udev.h"
# include "SDL_scancode.h"
# include "../../events/SDL_events_c.h"
/* This isn't defined in older Linux kernel headers */
# ifndef SYN_DROPPED
# define SYN_DROPPED 3
# endif
static SDL_Scancode SDL_EVDEV_translate_keycode ( int keycode ) ;
static void SDL_EVDEV_sync_device ( SDL_evdevlist_item * item ) ;
static int SDL_EVDEV_device_removed ( const char * devpath ) ;
# if SDL_USE_LIBUDEV
static int SDL_EVDEV_device_added ( const char * devpath ) ;
void SDL_EVDEV_udev_callback ( SDL_UDEV_deviceevent udev_type , int udev_class , const char * devpath ) ;
# endif /* SDL_USE_LIBUDEV */
static SDL_Scancode EVDEV_Keycodes [ ] = {
SDL_SCANCODE_UNKNOWN , /* KEY_RESERVED 0 */
SDL_SCANCODE_ESCAPE , /* KEY_ESC 1 */
SDL_SCANCODE_1 , /* KEY_1 2 */
SDL_SCANCODE_2 , /* KEY_2 3 */
SDL_SCANCODE_3 , /* KEY_3 4 */
SDL_SCANCODE_4 , /* KEY_4 5 */
SDL_SCANCODE_5 , /* KEY_5 6 */
SDL_SCANCODE_6 , /* KEY_6 7 */
SDL_SCANCODE_7 , /* KEY_7 8 */
SDL_SCANCODE_8 , /* KEY_8 9 */
SDL_SCANCODE_9 , /* KEY_9 10 */
SDL_SCANCODE_0 , /* KEY_0 11 */
SDL_SCANCODE_MINUS , /* KEY_MINUS 12 */
SDL_SCANCODE_EQUALS , /* KEY_EQUAL 13 */
SDL_SCANCODE_BACKSPACE , /* KEY_BACKSPACE 14 */
SDL_SCANCODE_TAB , /* KEY_TAB 15 */
SDL_SCANCODE_Q , /* KEY_Q 16 */
SDL_SCANCODE_W , /* KEY_W 17 */
SDL_SCANCODE_E , /* KEY_E 18 */
SDL_SCANCODE_R , /* KEY_R 19 */
SDL_SCANCODE_T , /* KEY_T 20 */
SDL_SCANCODE_Y , /* KEY_Y 21 */
SDL_SCANCODE_U , /* KEY_U 22 */
SDL_SCANCODE_I , /* KEY_I 23 */
SDL_SCANCODE_O , /* KEY_O 24 */
SDL_SCANCODE_P , /* KEY_P 25 */
SDL_SCANCODE_LEFTBRACKET , /* KEY_LEFTBRACE 26 */
SDL_SCANCODE_RIGHTBRACKET , /* KEY_RIGHTBRACE 27 */
SDL_SCANCODE_RETURN , /* KEY_ENTER 28 */
SDL_SCANCODE_LCTRL , /* KEY_LEFTCTRL 29 */
SDL_SCANCODE_A , /* KEY_A 30 */
SDL_SCANCODE_S , /* KEY_S 31 */
SDL_SCANCODE_D , /* KEY_D 32 */
SDL_SCANCODE_F , /* KEY_F 33 */
SDL_SCANCODE_G , /* KEY_G 34 */
SDL_SCANCODE_H , /* KEY_H 35 */
SDL_SCANCODE_J , /* KEY_J 36 */
SDL_SCANCODE_K , /* KEY_K 37 */
SDL_SCANCODE_L , /* KEY_L 38 */
SDL_SCANCODE_SEMICOLON , /* KEY_SEMICOLON 39 */
SDL_SCANCODE_APOSTROPHE , /* KEY_APOSTROPHE 40 */
SDL_SCANCODE_GRAVE , /* KEY_GRAVE 41 */
SDL_SCANCODE_LSHIFT , /* KEY_LEFTSHIFT 42 */
SDL_SCANCODE_BACKSLASH , /* KEY_BACKSLASH 43 */
SDL_SCANCODE_Z , /* KEY_Z 44 */
SDL_SCANCODE_X , /* KEY_X 45 */
SDL_SCANCODE_C , /* KEY_C 46 */
SDL_SCANCODE_V , /* KEY_V 47 */
SDL_SCANCODE_B , /* KEY_B 48 */
SDL_SCANCODE_N , /* KEY_N 49 */
SDL_SCANCODE_M , /* KEY_M 50 */
SDL_SCANCODE_COMMA , /* KEY_COMMA 51 */
SDL_SCANCODE_PERIOD , /* KEY_DOT 52 */
SDL_SCANCODE_SLASH , /* KEY_SLASH 53 */
SDL_SCANCODE_RSHIFT , /* KEY_RIGHTSHIFT 54 */
SDL_SCANCODE_KP_MULTIPLY , /* KEY_KPASTERISK 55 */
SDL_SCANCODE_LALT , /* KEY_LEFTALT 56 */
SDL_SCANCODE_SPACE , /* KEY_SPACE 57 */
SDL_SCANCODE_CAPSLOCK , /* KEY_CAPSLOCK 58 */
SDL_SCANCODE_F1 , /* KEY_F1 59 */
SDL_SCANCODE_F2 , /* KEY_F2 60 */
SDL_SCANCODE_F3 , /* KEY_F3 61 */
SDL_SCANCODE_F4 , /* KEY_F4 62 */
SDL_SCANCODE_F5 , /* KEY_F5 63 */
SDL_SCANCODE_F6 , /* KEY_F6 64 */
SDL_SCANCODE_F7 , /* KEY_F7 65 */
SDL_SCANCODE_F8 , /* KEY_F8 66 */
SDL_SCANCODE_F9 , /* KEY_F9 67 */
SDL_SCANCODE_F10 , /* KEY_F10 68 */
SDL_SCANCODE_NUMLOCKCLEAR , /* KEY_NUMLOCK 69 */
SDL_SCANCODE_SCROLLLOCK , /* KEY_SCROLLLOCK 70 */
SDL_SCANCODE_KP_7 , /* KEY_KP7 71 */
SDL_SCANCODE_KP_8 , /* KEY_KP8 72 */
SDL_SCANCODE_KP_9 , /* KEY_KP9 73 */
SDL_SCANCODE_KP_MINUS , /* KEY_KPMINUS 74 */
SDL_SCANCODE_KP_4 , /* KEY_KP4 75 */
SDL_SCANCODE_KP_5 , /* KEY_KP5 76 */
SDL_SCANCODE_KP_6 , /* KEY_KP6 77 */
SDL_SCANCODE_KP_PLUS , /* KEY_KPPLUS 78 */
SDL_SCANCODE_KP_1 , /* KEY_KP1 79 */
SDL_SCANCODE_KP_2 , /* KEY_KP2 80 */
SDL_SCANCODE_KP_3 , /* KEY_KP3 81 */
SDL_SCANCODE_KP_0 , /* KEY_KP0 82 */
SDL_SCANCODE_KP_PERIOD , /* KEY_KPDOT 83 */
SDL_SCANCODE_UNKNOWN , /* 84 */
SDL_SCANCODE_LANG5 , /* KEY_ZENKAKUHANKAKU 85 */
SDL_SCANCODE_UNKNOWN , /* KEY_102ND 86 */
SDL_SCANCODE_F11 , /* KEY_F11 87 */
SDL_SCANCODE_F12 , /* KEY_F12 88 */
SDL_SCANCODE_UNKNOWN , /* KEY_RO 89 */
SDL_SCANCODE_LANG3 , /* KEY_KATAKANA 90 */
SDL_SCANCODE_LANG4 , /* KEY_HIRAGANA 91 */
SDL_SCANCODE_UNKNOWN , /* KEY_HENKAN 92 */
SDL_SCANCODE_LANG3 , /* KEY_KATAKANAHIRAGANA 93 */
SDL_SCANCODE_UNKNOWN , /* KEY_MUHENKAN 94 */
SDL_SCANCODE_KP_COMMA , /* KEY_KPJPCOMMA 95 */
SDL_SCANCODE_KP_ENTER , /* KEY_KPENTER 96 */
SDL_SCANCODE_RCTRL , /* KEY_RIGHTCTRL 97 */
SDL_SCANCODE_KP_DIVIDE , /* KEY_KPSLASH 98 */
SDL_SCANCODE_SYSREQ , /* KEY_SYSRQ 99 */
SDL_SCANCODE_RALT , /* KEY_RIGHTALT 100 */
SDL_SCANCODE_UNKNOWN , /* KEY_LINEFEED 101 */
SDL_SCANCODE_HOME , /* KEY_HOME 102 */
SDL_SCANCODE_UP , /* KEY_UP 103 */
SDL_SCANCODE_PAGEUP , /* KEY_PAGEUP 104 */
SDL_SCANCODE_LEFT , /* KEY_LEFT 105 */
SDL_SCANCODE_RIGHT , /* KEY_RIGHT 106 */
SDL_SCANCODE_END , /* KEY_END 107 */
SDL_SCANCODE_DOWN , /* KEY_DOWN 108 */
SDL_SCANCODE_PAGEDOWN , /* KEY_PAGEDOWN 109 */
SDL_SCANCODE_INSERT , /* KEY_INSERT 110 */
SDL_SCANCODE_DELETE , /* KEY_DELETE 111 */
SDL_SCANCODE_UNKNOWN , /* KEY_MACRO 112 */
SDL_SCANCODE_MUTE , /* KEY_MUTE 113 */
SDL_SCANCODE_VOLUMEDOWN , /* KEY_VOLUMEDOWN 114 */
SDL_SCANCODE_VOLUMEUP , /* KEY_VOLUMEUP 115 */
SDL_SCANCODE_POWER , /* KEY_POWER 116 SC System Power Down */
SDL_SCANCODE_KP_EQUALS , /* KEY_KPEQUAL 117 */
SDL_SCANCODE_KP_MINUS , /* KEY_KPPLUSMINUS 118 */
SDL_SCANCODE_PAUSE , /* KEY_PAUSE 119 */
SDL_SCANCODE_UNKNOWN , /* KEY_SCALE 120 AL Compiz Scale (Expose) */
SDL_SCANCODE_KP_COMMA , /* KEY_KPCOMMA 121 */
SDL_SCANCODE_LANG1 , /* KEY_HANGEUL,KEY_HANGUEL 122 */
SDL_SCANCODE_LANG2 , /* KEY_HANJA 123 */
SDL_SCANCODE_INTERNATIONAL3 , /* KEY_YEN 124 */
SDL_SCANCODE_LGUI , /* KEY_LEFTMETA 125 */
SDL_SCANCODE_RGUI , /* KEY_RIGHTMETA 126 */
SDL_SCANCODE_APPLICATION , /* KEY_COMPOSE 127 */
SDL_SCANCODE_STOP , /* KEY_STOP 128 AC Stop */
SDL_SCANCODE_AGAIN , /* KEY_AGAIN 129 */
SDL_SCANCODE_UNKNOWN , /* KEY_PROPS 130 AC Properties */
SDL_SCANCODE_UNDO , /* KEY_UNDO 131 AC Undo */
SDL_SCANCODE_UNKNOWN , /* KEY_FRONT 132 */
SDL_SCANCODE_COPY , /* KEY_COPY 133 AC Copy */
SDL_SCANCODE_UNKNOWN , /* KEY_OPEN 134 AC Open */
SDL_SCANCODE_PASTE , /* KEY_PASTE 135 AC Paste */
SDL_SCANCODE_FIND , /* KEY_FIND 136 AC Search */
SDL_SCANCODE_CUT , /* KEY_CUT 137 AC Cut */
SDL_SCANCODE_HELP , /* KEY_HELP 138 AL Integrated Help Center */
SDL_SCANCODE_MENU , /* KEY_MENU 139 Menu (show menu) */
SDL_SCANCODE_CALCULATOR , /* KEY_CALC 140 AL Calculator */
SDL_SCANCODE_UNKNOWN , /* KEY_SETUP 141 */
SDL_SCANCODE_SLEEP , /* KEY_SLEEP 142 SC System Sleep */
SDL_SCANCODE_UNKNOWN , /* KEY_WAKEUP 143 System Wake Up */
SDL_SCANCODE_UNKNOWN , /* KEY_FILE 144 AL Local Machine Browser */
SDL_SCANCODE_UNKNOWN , /* KEY_SENDFILE 145 */
SDL_SCANCODE_UNKNOWN , /* KEY_DELETEFILE 146 */
SDL_SCANCODE_UNKNOWN , /* KEY_XFER 147 */
SDL_SCANCODE_APP1 , /* KEY_PROG1 148 */
SDL_SCANCODE_APP1 , /* KEY_PROG2 149 */
SDL_SCANCODE_WWW , /* KEY_WWW 150 AL Internet Browser */
SDL_SCANCODE_UNKNOWN , /* KEY_MSDOS 151 */
SDL_SCANCODE_UNKNOWN , /* KEY_COFFEE,KEY_SCREENLOCK 152 AL Terminal Lock/Screensaver */
SDL_SCANCODE_UNKNOWN , /* KEY_DIRECTION 153 */
SDL_SCANCODE_UNKNOWN , /* KEY_CYCLEWINDOWS 154 */
SDL_SCANCODE_MAIL , /* KEY_MAIL 155 */
SDL_SCANCODE_AC_BOOKMARKS , /* KEY_BOOKMARKS 156 AC Bookmarks */
SDL_SCANCODE_COMPUTER , /* KEY_COMPUTER 157 */
SDL_SCANCODE_AC_BACK , /* KEY_BACK 158 AC Back */
SDL_SCANCODE_AC_FORWARD , /* KEY_FORWARD 159 AC Forward */
SDL_SCANCODE_UNKNOWN , /* KEY_CLOSECD 160 */
SDL_SCANCODE_EJECT , /* KEY_EJECTCD 161 */
SDL_SCANCODE_UNKNOWN , /* KEY_EJECTCLOSECD 162 */
SDL_SCANCODE_AUDIONEXT , /* KEY_NEXTSONG 163 */
SDL_SCANCODE_AUDIOPLAY , /* KEY_PLAYPAUSE 164 */
SDL_SCANCODE_AUDIOPREV , /* KEY_PREVIOUSSONG 165 */
SDL_SCANCODE_AUDIOSTOP , /* KEY_STOPCD 166 */
SDL_SCANCODE_UNKNOWN , /* KEY_RECORD 167 */
SDL_SCANCODE_UNKNOWN , /* KEY_REWIND 168 */
SDL_SCANCODE_UNKNOWN , /* KEY_PHONE 169 Media Select Telephone */
SDL_SCANCODE_UNKNOWN , /* KEY_ISO 170 */
SDL_SCANCODE_UNKNOWN , /* KEY_CONFIG 171 AL Consumer Control Configuration */
SDL_SCANCODE_AC_HOME , /* KEY_HOMEPAGE 172 AC Home */
SDL_SCANCODE_AC_REFRESH , /* KEY_REFRESH 173 AC Refresh */
SDL_SCANCODE_UNKNOWN , /* KEY_EXIT 174 AC Exit */
SDL_SCANCODE_UNKNOWN , /* KEY_MOVE 175 */
SDL_SCANCODE_UNKNOWN , /* KEY_EDIT 176 */
SDL_SCANCODE_UNKNOWN , /* KEY_SCROLLUP 177 */
SDL_SCANCODE_UNKNOWN , /* KEY_SCROLLDOWN 178 */
SDL_SCANCODE_KP_LEFTPAREN , /* KEY_KPLEFTPAREN 179 */
SDL_SCANCODE_KP_RIGHTPAREN , /* KEY_KPRIGHTPAREN 180 */
SDL_SCANCODE_UNKNOWN , /* KEY_NEW 181 AC New */
SDL_SCANCODE_AGAIN , /* KEY_REDO 182 AC Redo/Repeat */
SDL_SCANCODE_F13 , /* KEY_F13 183 */
SDL_SCANCODE_F14 , /* KEY_F14 184 */
SDL_SCANCODE_F15 , /* KEY_F15 185 */
SDL_SCANCODE_F16 , /* KEY_F16 186 */
SDL_SCANCODE_F17 , /* KEY_F17 187 */
SDL_SCANCODE_F18 , /* KEY_F18 188 */
SDL_SCANCODE_F19 , /* KEY_F19 189 */
SDL_SCANCODE_F20 , /* KEY_F20 190 */
SDL_SCANCODE_F21 , /* KEY_F21 191 */
SDL_SCANCODE_F22 , /* KEY_F22 192 */
SDL_SCANCODE_F23 , /* KEY_F23 193 */
SDL_SCANCODE_F24 , /* KEY_F24 194 */
SDL_SCANCODE_UNKNOWN , /* 195 */
SDL_SCANCODE_UNKNOWN , /* 196 */
SDL_SCANCODE_UNKNOWN , /* 197 */
SDL_SCANCODE_UNKNOWN , /* 198 */
SDL_SCANCODE_UNKNOWN , /* 199 */
SDL_SCANCODE_UNKNOWN , /* KEY_PLAYCD 200 */
SDL_SCANCODE_UNKNOWN , /* KEY_PAUSECD 201 */
SDL_SCANCODE_UNKNOWN , /* KEY_PROG3 202 */
SDL_SCANCODE_UNKNOWN , /* KEY_PROG4 203 */
SDL_SCANCODE_UNKNOWN , /* KEY_DASHBOARD 204 AL Dashboard */
SDL_SCANCODE_UNKNOWN , /* KEY_SUSPEND 205 */
SDL_SCANCODE_UNKNOWN , /* KEY_CLOSE 206 AC Close */
SDL_SCANCODE_UNKNOWN , /* KEY_PLAY 207 */
SDL_SCANCODE_UNKNOWN , /* KEY_FASTFORWARD 208 */
SDL_SCANCODE_UNKNOWN , /* KEY_BASSBOOST 209 */
SDL_SCANCODE_UNKNOWN , /* KEY_PRINT 210 AC Print */
SDL_SCANCODE_UNKNOWN , /* KEY_HP 211 */
SDL_SCANCODE_UNKNOWN , /* KEY_CAMERA 212 */
SDL_SCANCODE_UNKNOWN , /* KEY_SOUND 213 */
SDL_SCANCODE_UNKNOWN , /* KEY_QUESTION 214 */
SDL_SCANCODE_UNKNOWN , /* KEY_EMAIL 215 */
SDL_SCANCODE_UNKNOWN , /* KEY_CHAT 216 */
SDL_SCANCODE_UNKNOWN , /* KEY_SEARCH 217 */
SDL_SCANCODE_UNKNOWN , /* KEY_CONNECT 218 */
SDL_SCANCODE_UNKNOWN , /* KEY_FINANCE 219 AL Checkbook/Finance */
SDL_SCANCODE_UNKNOWN , /* KEY_SPORT 220 */
SDL_SCANCODE_UNKNOWN , /* KEY_SHOP 221 */
SDL_SCANCODE_UNKNOWN , /* KEY_ALTERASE 222 */
SDL_SCANCODE_UNKNOWN , /* KEY_CANCEL 223 AC Cancel */
SDL_SCANCODE_UNKNOWN , /* KEY_BRIGHTNESSDOWN 224 */
SDL_SCANCODE_UNKNOWN , /* KEY_BRIGHTNESSUP 225 */
SDL_SCANCODE_UNKNOWN , /* KEY_MEDIA 226 */
SDL_SCANCODE_UNKNOWN , /* KEY_SWITCHVIDEOMODE 227 Cycle between available video outputs (Monitor/LCD/TV-out/etc) */
SDL_SCANCODE_UNKNOWN , /* KEY_KBDILLUMTOGGLE 228 */
SDL_SCANCODE_UNKNOWN , /* KEY_KBDILLUMDOWN 229 */
SDL_SCANCODE_UNKNOWN , /* KEY_KBDILLUMUP 230 */
SDL_SCANCODE_UNKNOWN , /* KEY_SEND 231 AC Send */
SDL_SCANCODE_UNKNOWN , /* KEY_REPLY 232 AC Reply */
SDL_SCANCODE_UNKNOWN , /* KEY_FORWARDMAIL 233 AC Forward Msg */
SDL_SCANCODE_UNKNOWN , /* KEY_SAVE 234 AC Save */
SDL_SCANCODE_UNKNOWN , /* KEY_DOCUMENTS 235 */
SDL_SCANCODE_UNKNOWN , /* KEY_BATTERY 236 */
SDL_SCANCODE_UNKNOWN , /* KEY_BLUETOOTH 237 */
SDL_SCANCODE_UNKNOWN , /* KEY_WLAN 238 */
SDL_SCANCODE_UNKNOWN , /* KEY_UWB 239 */
SDL_SCANCODE_UNKNOWN , /* KEY_UNKNOWN 240 */
SDL_SCANCODE_UNKNOWN , /* KEY_VIDEO_NEXT 241 drive next video source */
SDL_SCANCODE_UNKNOWN , /* KEY_VIDEO_PREV 242 drive previous video source */
SDL_SCANCODE_UNKNOWN , /* KEY_BRIGHTNESS_CYCLE 243 brightness up, after max is min */
SDL_SCANCODE_UNKNOWN , /* KEY_BRIGHTNESS_ZERO 244 brightness off, use ambient */
SDL_SCANCODE_UNKNOWN , /* KEY_DISPLAY_OFF 245 display device to off state */
SDL_SCANCODE_UNKNOWN , /* KEY_WIMAX 246 */
SDL_SCANCODE_UNKNOWN , /* KEY_RFKILL 247 Key that controls all radios */
SDL_SCANCODE_UNKNOWN , /* KEY_MICMUTE 248 Mute / unmute the microphone */
} ;
static Uint8 EVDEV_MouseButtons [ ] = {
SDL_BUTTON_LEFT , /* BTN_LEFT 0x110 */
SDL_BUTTON_RIGHT , /* BTN_RIGHT 0x111 */
SDL_BUTTON_MIDDLE , /* BTN_MIDDLE 0x112 */
SDL_BUTTON_X1 , /* BTN_SIDE 0x113 */
SDL_BUTTON_X2 , /* BTN_EXTRA 0x114 */
SDL_BUTTON_X2 + 1 , /* BTN_FORWARD 0x115 */
SDL_BUTTON_X2 + 2 , /* BTN_BACK 0x116 */
SDL_BUTTON_X2 + 3 /* BTN_TASK 0x117 */
} ;
static const char * EVDEV_consoles [ ] = {
" /proc/self/fd/0 " ,
" /dev/tty " ,
" /dev/tty0 " ,
" /dev/tty1 " ,
" /dev/tty2 " ,
" /dev/tty3 " ,
" /dev/tty4 " ,
" /dev/tty5 " ,
" /dev/tty6 " ,
" /dev/vc/0 " ,
" /dev/console "
} ;
# define IS_CONSOLE(fd) isatty (fd) && ioctl(fd, KDGKBTYPE, &arg) == 0 && ((arg == KB_101) || (arg == KB_84))
static int SDL_EVDEV_get_console_fd ( void )
{
int fd , i ;
char arg = 0 ;
/* Try a few consoles to see which one we have read access to */
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for ( i = 0 ; i < SDL_arraysize ( EVDEV_consoles ) ; i + + ) {
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fd = open ( EVDEV_consoles [ i ] , O_RDONLY ) ;
if ( fd > = 0 ) {
if ( IS_CONSOLE ( fd ) ) return fd ;
close ( fd ) ;
}
}
/* Try stdin, stdout, stderr */
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for ( fd = 0 ; fd < 3 ; fd + + ) {
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if ( IS_CONSOLE ( fd ) ) return fd ;
}
/* We won't be able to send SDL_TEXTINPUT events */
return - 1 ;
}
/* Prevent keystrokes from reaching the tty */
static int SDL_EVDEV_mute_keyboard ( int tty , int * kb_mode )
{
char arg ;
* kb_mode = 0 ; /* FIXME: Is this a sane default in case KDGKBMODE fails? */
if ( ! IS_CONSOLE ( tty ) ) {
return SDL_SetError ( " Tried to mute an invalid tty " ) ;
}
ioctl ( tty , KDGKBMODE , kb_mode ) ; /* It's not fatal if this fails */
if ( ioctl ( tty , KDSKBMUTE , 1 ) & & ioctl ( tty , KDSKBMODE , K_OFF ) ) {
return SDL_SetError ( " EVDEV: Failed muting keyboard " ) ;
}
return 0 ;
}
/* Restore the keyboard mode for given tty */
static void SDL_EVDEV_unmute_keyboard ( int tty , int kb_mode )
{
if ( ioctl ( tty , KDSKBMUTE , 0 ) & & ioctl ( tty , KDSKBMODE , kb_mode ) ) {
SDL_Log ( " EVDEV: Failed restoring keyboard mode " ) ;
}
}
/* Read /sys/class/tty/tty0/active and open the tty */
static int SDL_EVDEV_get_active_tty ( )
{
int fd , len ;
char ttyname [ NAME_MAX + 1 ] ;
char ttypath [ PATH_MAX + 1 ] = " /dev/ " ;
char arg ;
fd = open ( " /sys/class/tty/tty0/active " , O_RDONLY ) ;
if ( fd < 0 ) {
return SDL_SetError ( " Could not determine which tty is active " ) ;
}
len = read ( fd , ttyname , NAME_MAX ) ;
close ( fd ) ;
if ( len < = 0 ) {
return SDL_SetError ( " Could not read which tty is active " ) ;
}
if ( ttyname [ len - 1 ] = = ' \n ' ) {
ttyname [ len - 1 ] = ' \0 ' ;
}
else {
ttyname [ len ] = ' \0 ' ;
}
SDL_strlcat ( ttypath , ttyname , PATH_MAX ) ;
fd = open ( ttypath , O_RDWR | O_NOCTTY ) ;
if ( fd < 0 ) {
return SDL_SetError ( " Could not open tty: %s " , ttypath ) ;
}
if ( ! IS_CONSOLE ( fd ) ) {
close ( fd ) ;
return SDL_SetError ( " Invalid tty obtained: %s " , ttypath ) ;
}
return fd ;
}
int
SDL_EVDEV_Init ( void )
{
int retval = 0 ;
if ( _this = = NULL ) {
_this = ( SDL_EVDEV_PrivateData * ) SDL_calloc ( 1 , sizeof ( * _this ) ) ;
if ( _this = = NULL ) {
return SDL_OutOfMemory ( ) ;
}
# if SDL_USE_LIBUDEV
if ( SDL_UDEV_Init ( ) < 0 ) {
SDL_free ( _this ) ;
_this = NULL ;
return - 1 ;
}
/* Set up the udev callback */
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if ( SDL_UDEV_AddCallback ( SDL_EVDEV_udev_callback ) < 0 ) {
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SDL_EVDEV_Quit ( ) ;
return - 1 ;
}
/* Force a scan to build the initial device list */
SDL_UDEV_Scan ( ) ;
# else
/* TODO: Scan the devices manually, like a caveman */
# endif /* SDL_USE_LIBUDEV */
/* We need a physical terminal (not PTS) to be able to translate key code to symbols via the kernel tables */
_this - > console_fd = SDL_EVDEV_get_console_fd ( ) ;
/* Mute the keyboard so keystrokes only generate evdev events and do not leak through to the console */
_this - > tty = STDIN_FILENO ;
if ( SDL_EVDEV_mute_keyboard ( _this - > tty , & _this - > kb_mode ) < 0 ) {
/* stdin is not a tty, probably we were launched remotely, so we try to disable the active tty */
_this - > tty = SDL_EVDEV_get_active_tty ( ) ;
if ( _this - > tty > = 0 ) {
if ( SDL_EVDEV_mute_keyboard ( _this - > tty , & _this - > kb_mode ) < 0 ) {
close ( _this - > tty ) ;
_this - > tty = - 1 ;
}
}
}
}
_this - > ref_count + = 1 ;
return retval ;
}
void
SDL_EVDEV_Quit ( void )
{
if ( _this = = NULL ) {
return ;
}
_this - > ref_count - = 1 ;
if ( _this - > ref_count < 1 ) {
# if SDL_USE_LIBUDEV
SDL_UDEV_DelCallback ( SDL_EVDEV_udev_callback ) ;
SDL_UDEV_Quit ( ) ;
# endif /* SDL_USE_LIBUDEV */
if ( _this - > console_fd > = 0 ) {
close ( _this - > console_fd ) ;
}
if ( _this - > tty > = 0 ) {
SDL_EVDEV_unmute_keyboard ( _this - > tty , _this - > kb_mode ) ;
close ( _this - > tty ) ;
}
/* Remove existing devices */
while ( _this - > first ! = NULL ) {
SDL_EVDEV_device_removed ( _this - > first - > path ) ;
}
SDL_assert ( _this - > first = = NULL ) ;
SDL_assert ( _this - > last = = NULL ) ;
SDL_assert ( _this - > numdevices = = 0 ) ;
SDL_free ( _this ) ;
_this = NULL ;
}
}
# if SDL_USE_LIBUDEV
void SDL_EVDEV_udev_callback ( SDL_UDEV_deviceevent udev_type , int udev_class , const char * devpath )
{
if ( devpath = = NULL ) {
return ;
}
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switch ( udev_type ) {
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case SDL_UDEV_DEVICEADDED :
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if ( ! ( udev_class & ( SDL_UDEV_DEVICE_MOUSE | SDL_UDEV_DEVICE_KEYBOARD ) ) ) {
return ;
}
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SDL_EVDEV_device_added ( devpath ) ;
break ;
case SDL_UDEV_DEVICEREMOVED :
SDL_EVDEV_device_removed ( devpath ) ;
break ;
default :
break ;
}
}
# endif /* SDL_USE_LIBUDEV */
void
SDL_EVDEV_Poll ( void )
{
struct input_event events [ 32 ] ;
int i , len ;
SDL_evdevlist_item * item ;
SDL_Scancode scan_code ;
int mouse_button ;
SDL_Mouse * mouse ;
# ifdef SDL_INPUT_LINUXKD
Uint16 modstate ;
struct kbentry kbe ;
static char keysym [ 8 ] ;
char * end ;
Uint32 kval ;
# endif
if ( ! _this ) {
return ;
}
# if SDL_USE_LIBUDEV
SDL_UDEV_Poll ( ) ;
# endif
mouse = SDL_GetMouse ( ) ;
for ( item = _this - > first ; item ! = NULL ; item = item - > next ) {
while ( ( len = read ( item - > fd , events , ( sizeof events ) ) ) > 0 ) {
len / = sizeof ( events [ 0 ] ) ;
for ( i = 0 ; i < len ; + + i ) {
switch ( events [ i ] . type ) {
case EV_KEY :
if ( events [ i ] . code > = BTN_MOUSE & & events [ i ] . code < BTN_MOUSE + SDL_arraysize ( EVDEV_MouseButtons ) ) {
mouse_button = events [ i ] . code - BTN_MOUSE ;
if ( events [ i ] . value = = 0 ) {
SDL_SendMouseButton ( mouse - > focus , mouse - > mouseID , SDL_RELEASED , EVDEV_MouseButtons [ mouse_button ] ) ;
} else if ( events [ i ] . value = = 1 ) {
SDL_SendMouseButton ( mouse - > focus , mouse - > mouseID , SDL_PRESSED , EVDEV_MouseButtons [ mouse_button ] ) ;
}
break ;
}
/* Probably keyboard */
scan_code = SDL_EVDEV_translate_keycode ( events [ i ] . code ) ;
if ( scan_code ! = SDL_SCANCODE_UNKNOWN ) {
if ( events [ i ] . value = = 0 ) {
SDL_SendKeyboardKey ( SDL_RELEASED , scan_code ) ;
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} else if ( events [ i ] . value = = 1 | | events [ i ] . value = = 2 /* Key repeated */ ) {
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SDL_SendKeyboardKey ( SDL_PRESSED , scan_code ) ;
# ifdef SDL_INPUT_LINUXKD
if ( _this - > console_fd > = 0 ) {
kbe . kb_index = events [ i ] . code ;
/* Convert the key to an UTF-8 char */
/* Ref: http://www.linuxjournal.com/article/2783 */
modstate = SDL_GetModState ( ) ;
kbe . kb_table = 0 ;
/* Ref: http://graphics.stanford.edu/~seander/bithacks.html#ConditionalSetOrClearBitsWithoutBranching */
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kbe . kb_table | = - ( ( modstate & KMOD_LCTRL ) ! = 0 ) & ( 1 < < KG_CTRLL | 1 < < KG_CTRL ) ;
kbe . kb_table | = - ( ( modstate & KMOD_RCTRL ) ! = 0 ) & ( 1 < < KG_CTRLR | 1 < < KG_CTRL ) ;
kbe . kb_table | = - ( ( modstate & KMOD_LSHIFT ) ! = 0 ) & ( 1 < < KG_SHIFTL | 1 < < KG_SHIFT ) ;
kbe . kb_table | = - ( ( modstate & KMOD_RSHIFT ) ! = 0 ) & ( 1 < < KG_SHIFTR | 1 < < KG_SHIFT ) ;
kbe . kb_table | = - ( ( modstate & KMOD_LALT ) ! = 0 ) & ( 1 < < KG_ALT ) ;
kbe . kb_table | = - ( ( modstate & KMOD_RALT ) ! = 0 ) & ( 1 < < KG_ALTGR ) ;
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if ( ioctl ( _this - > console_fd , KDGKBENT , ( unsigned long ) & kbe ) = = 0 & &
( ( KTYP ( kbe . kb_value ) = = KT_LATIN ) | | ( KTYP ( kbe . kb_value ) = = KT_ASCII ) | | ( KTYP ( kbe . kb_value ) = = KT_LETTER ) ) )
{
kval = KVAL ( kbe . kb_value ) ;
/* While there's a KG_CAPSSHIFT symbol, it's not useful to build the table index with it
* because 1 < < KG_CAPSSHIFT overflows the 8 bits of kb_table
* So , we do the CAPS LOCK logic here . Note that isalpha depends on the locale !
*/
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if ( modstate & KMOD_CAPS & & isalpha ( kval ) ) {
if ( isupper ( kval ) ) {
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kval = tolower ( kval ) ;
} else {
kval = toupper ( kval ) ;
}
}
/* Convert to UTF-8 and send */
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end = SDL_UCS4ToUTF8 ( kval , keysym ) ;
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* end = ' \0 ' ;
SDL_SendKeyboardText ( keysym ) ;
}
}
# endif /* SDL_INPUT_LINUXKD */
}
}
break ;
case EV_ABS :
switch ( events [ i ] . code ) {
case ABS_X :
SDL_SendMouseMotion ( mouse - > focus , mouse - > mouseID , SDL_FALSE , events [ i ] . value , mouse - > y ) ;
break ;
case ABS_Y :
SDL_SendMouseMotion ( mouse - > focus , mouse - > mouseID , SDL_FALSE , mouse - > x , events [ i ] . value ) ;
break ;
default :
break ;
}
break ;
case EV_REL :
switch ( events [ i ] . code ) {
case REL_X :
SDL_SendMouseMotion ( mouse - > focus , mouse - > mouseID , SDL_TRUE , events [ i ] . value , 0 ) ;
break ;
case REL_Y :
SDL_SendMouseMotion ( mouse - > focus , mouse - > mouseID , SDL_TRUE , 0 , events [ i ] . value ) ;
break ;
case REL_WHEEL :
SDL_SendMouseWheel ( mouse - > focus , mouse - > mouseID , 0 , events [ i ] . value , SDL_MOUSEWHEEL_NORMAL ) ;
break ;
case REL_HWHEEL :
SDL_SendMouseWheel ( mouse - > focus , mouse - > mouseID , events [ i ] . value , 0 , SDL_MOUSEWHEEL_NORMAL ) ;
break ;
default :
break ;
}
break ;
case EV_SYN :
switch ( events [ i ] . code ) {
case SYN_DROPPED :
SDL_EVDEV_sync_device ( item ) ;
break ;
default :
break ;
}
break ;
}
}
}
}
}
static SDL_Scancode
SDL_EVDEV_translate_keycode ( int keycode )
{
SDL_Scancode scancode = SDL_SCANCODE_UNKNOWN ;
if ( keycode < SDL_arraysize ( EVDEV_Keycodes ) ) {
scancode = EVDEV_Keycodes [ keycode ] ;
}
if ( scancode = = SDL_SCANCODE_UNKNOWN ) {
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 ) ;
}
return scancode ;
}
static void
SDL_EVDEV_sync_device ( SDL_evdevlist_item * item )
{
/* TODO: get full state of device and report whatever is required */
}
# if SDL_USE_LIBUDEV
static int
SDL_EVDEV_device_added ( const char * devpath )
{
SDL_evdevlist_item * item ;
/* Check to make sure it's not already in list. */
for ( item = _this - > first ; item ! = NULL ; item = item - > next ) {
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if ( SDL_strcmp ( devpath , item - > path ) = = 0 ) {
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return - 1 ; /* already have this one */
}
}
item = ( SDL_evdevlist_item * ) SDL_calloc ( 1 , sizeof ( SDL_evdevlist_item ) ) ;
if ( item = = NULL ) {
return SDL_OutOfMemory ( ) ;
}
item - > fd = open ( devpath , O_RDONLY , 0 ) ;
if ( item - > fd < 0 ) {
SDL_free ( item ) ;
return SDL_SetError ( " Unable to open %s " , devpath ) ;
}
item - > path = SDL_strdup ( devpath ) ;
if ( item - > path = = NULL ) {
close ( item - > fd ) ;
SDL_free ( item ) ;
return SDL_OutOfMemory ( ) ;
}
/* Non blocking read mode */
fcntl ( item - > fd , F_SETFL , O_NONBLOCK ) ;
if ( _this - > last = = NULL ) {
_this - > first = _this - > last = item ;
} else {
_this - > last - > next = item ;
_this - > last = item ;
}
SDL_EVDEV_sync_device ( item ) ;
return _this - > numdevices + + ;
}
# endif /* SDL_USE_LIBUDEV */
static int
SDL_EVDEV_device_removed ( const char * devpath )
{
SDL_evdevlist_item * item ;
SDL_evdevlist_item * prev = NULL ;
for ( item = _this - > first ; item ! = NULL ; item = item - > next ) {
/* found it, remove it. */
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if ( SDL_strcmp ( devpath , item - > path ) = = 0 ) {
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if ( prev ! = NULL ) {
prev - > next = item - > next ;
} else {
SDL_assert ( _this - > first = = item ) ;
_this - > first = item - > next ;
}
if ( item = = _this - > last ) {
_this - > last = prev ;
}
close ( item - > fd ) ;
SDL_free ( item - > path ) ;
SDL_free ( item ) ;
_this - > numdevices - - ;
return 0 ;
}
prev = item ;
}
return - 1 ;
}
# endif /* SDL_INPUT_LINUXEV */
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