├── .gitignore ├── initcpio ├── hook-deckrypt └── install-deckrypt ├── Makefile ├── README.md ├── src ├── uitype.c └── deckrypt_input.c ├── inc └── uitype.h └── LICENSE /.gitignore: -------------------------------------------------------------------------------- 1 | /deckrypt_input 2 | /deckrypt_input.o 3 | vgcore.* 4 | *.o 5 | /kbd/ 6 | -------------------------------------------------------------------------------- /initcpio/hook-deckrypt: -------------------------------------------------------------------------------- 1 | #!/usr/bin/ash 2 | 3 | run_hook() { 4 | deckrypt_input & 5 | } 6 | 7 | run_cleanuphook() { 8 | killall deckrypt_input 9 | } 10 | -------------------------------------------------------------------------------- /initcpio/install-deckrypt: -------------------------------------------------------------------------------- 1 | #!/bin/bash 2 | 3 | build() { 4 | add_module uinput 5 | add_binary deckrypt_input 6 | add_runscript 7 | } 8 | 9 | help() { 10 | cat < 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | #include 14 | 15 | #include "uitype.h" 16 | 17 | static struct libevdev *device; 18 | static struct libevdev_uinput *udevice; 19 | 20 | // "Reverse" keymap that maps ascii characters to event codes. The first 21 | // column is the modifier mask and the second column is the input event code. 22 | // Can be read as "Which modifiers and key do I need to press to produce a 23 | // certain ASCII character?". 24 | static uint8_t chrmap[CHRMAP_LEN_X][CHRMAP_LEN_Y]; 25 | 26 | static const uint8_t modmap[] = { 27 | KEY_LEFTSHIFT, 28 | KEY_RIGHTALT, 29 | KEY_LEFTCTRL, 30 | }; 31 | 32 | static void press(uint8_t mod, uint32_t code) { 33 | // Press modifiers 34 | for (size_t i = 0; i < ARRLEN(modmap); i++) { 35 | if (((int)(pow(2.0, (double)i)) & mod) > 0) { 36 | libevdev_uinput_write_event(udevice, EV_KEY, modmap[i], 1); 37 | libevdev_uinput_write_event(udevice, EV_SYN, SYN_REPORT, 0); 38 | } 39 | } 40 | 41 | // Press key 42 | libevdev_uinput_write_event(udevice, EV_KEY, code, 1); 43 | libevdev_uinput_write_event(udevice, EV_SYN, SYN_REPORT, 0); 44 | libevdev_uinput_write_event(udevice, EV_KEY, code, 0); 45 | libevdev_uinput_write_event(udevice, EV_SYN, SYN_REPORT, 0); 46 | 47 | // Release modifiers 48 | for (size_t i = 0; i < ARRLEN(modmap); i++) { 49 | if (((int)(pow(2.0, (double)i)) & mod) > 0) { 50 | libevdev_uinput_write_event(udevice, EV_KEY, modmap[i], 0); 51 | libevdev_uinput_write_event(udevice, EV_SYN, SYN_REPORT, 0); 52 | } 53 | } 54 | } 55 | 56 | // The kernel keymap maps event codes and modifiers to symbols. 57 | // We want to "reverse" this to map ASCII characters to event codes. 58 | // To make this work with different keyboard layouts, we use the libkeymap API 59 | // to check out the current keymap and generate our map from that. 60 | // Note that the kernel keymap is independent of the Xorg/Wayland keyboard layout 61 | // and only relevant on console/tty. 62 | static int genchrmap() { 63 | char *tty = ttyname(fileno(stdin)); 64 | int fd; 65 | if (tty == NULL) { 66 | fd = open("/dev/console", O_RDONLY); 67 | } 68 | else if (strncmp(tty, "/dev/tty", 8) == 0) { 69 | fd = open(tty, O_RDONLY); 70 | } 71 | else if (getuid() == 0) { 72 | fd = open("/dev/tty0", O_RDONLY); 73 | } 74 | else { 75 | fprintf(stderr, "Needs to run on tty/console or as root to read the kernel keymap. Using default US keymap.\n"); 76 | memcpy(chrmap, default_chrmap, CHRMAP_LEN_X * CHRMAP_LEN_Y); 77 | return 0; 78 | } 79 | 80 | struct lk_ctx *ctx = lk_init(); 81 | if (!ctx) { 82 | fprintf(stderr, "kbd initialization failed\n"); 83 | return 1; 84 | } 85 | 86 | lk_kernel_keymap(ctx, fd); 87 | 88 | // Traverse the kernel keymap to look for ASCII characters and store the 89 | // respective event codes and modifiers in our map. 90 | for (int j = 0; j <= 2; j++) { 91 | for (int i = 1; i <= 57; i++) { 92 | int code = lk_get_key(ctx, j, i); 93 | int ktyp = KTYP(code); 94 | int kval = KVAL(code); 95 | if ((ktyp == KT_LATIN || ktyp == KT_LETTER) && chrmap[kval][1] == 0) { 96 | chrmap[kval][1] = (uint8_t)i; 97 | chrmap[kval][0] = (uint8_t)j; 98 | } 99 | else if (code == 513 && chrmap['\n'][1] == 0) { 100 | chrmap['\n'][1] = (uint8_t)i; 101 | chrmap['\n'][0] = (uint8_t)j; 102 | } 103 | } 104 | } 105 | 106 | lk_free(ctx); 107 | return 0; 108 | } 109 | 110 | // Returns 0 on success. In this case the caller is responsible to call uitype_deinit 111 | int uitype_init() { 112 | if (genchrmap() != 0) { 113 | return 1; 114 | } 115 | device = libevdev_new(); 116 | libevdev_set_name(device, "virtual keyboard"); 117 | libevdev_enable_event_type(device, EV_KEY); 118 | for (uint8_t i = 0; i < 255; i++) { 119 | libevdev_enable_event_code(device, EV_KEY, i, NULL); 120 | } 121 | 122 | int rc = libevdev_uinput_create_from_device(device, LIBEVDEV_UINPUT_OPEN_MANAGED, &udevice); 123 | if (rc != 0) { 124 | libevdev_free(device); 125 | fprintf(stderr, "Error: Couldn't create libevdev uinput device\n"); 126 | return rc; 127 | } 128 | 129 | return 0; 130 | } 131 | 132 | void uitype_deinit() { 133 | libevdev_uinput_destroy(udevice); 134 | libevdev_free(device); 135 | } 136 | 137 | void uitype_type(char *string) { 138 | for (size_t i = 0; i < strlen(string); i++) { 139 | press(chrmap[(size_t)string[i]][0], chrmap[(size_t)string[i]][1]); 140 | // Give the consumer a bit time to process before the next key comes. 141 | usleep(1000); 142 | } 143 | } 144 | 145 | void uitype_enter() { 146 | press(0, KEY_ENTER); 147 | } 148 | 149 | void uitype_ctrlu() { 150 | press(4, KEY_U); 151 | } 152 | -------------------------------------------------------------------------------- /inc/uitype.h: -------------------------------------------------------------------------------- 1 | #include 2 | 3 | #include 4 | 5 | #define ARRLEN(a) (sizeof(a) / sizeof(a[0])) 6 | 7 | #define CHRMAP_LEN_X 256 8 | #define CHRMAP_LEN_Y 2 9 | 10 | int uitype_init(); 11 | 12 | void uitype_deinit(); 13 | 14 | void uitype_type(char *string); 15 | 16 | void uitype_enter(); 17 | 18 | void uitype_ctrlu(); 19 | 20 | // { modmask, event-code } 21 | static const uint8_t default_chrmap[CHRMAP_LEN_X][CHRMAP_LEN_Y] = { 22 | { 0, 0 }, 23 | { 0, 0 }, 24 | { 0, 0 }, 25 | { 0, 0 }, 26 | { 0, 0 }, 27 | { 0, 0 }, 28 | { 0, 0 }, 29 | { 0, 0 }, 30 | { 0, 0 }, 31 | { 0, 15 }, 32 | { 1, 28 }, 33 | { 0, 0 }, 34 | { 0, 0 }, 35 | { 0, 0 }, 36 | { 0, 0 }, 37 | { 0, 0 }, 38 | { 0, 0 }, 39 | { 0, 0 }, 40 | { 0, 0 }, 41 | { 0, 0 }, 42 | { 0, 0 }, 43 | { 0, 0 }, 44 | { 0, 0 }, 45 | { 0, 0 }, 46 | { 0, 0 }, 47 | { 0, 0 }, 48 | { 0, 0 }, 49 | { 1, 1 }, 50 | { 0, 0 }, 51 | { 0, 0 }, 52 | { 0, 0 }, 53 | { 0, 0 }, 54 | { 1, 57 }, 55 | { 1, 2 }, 56 | { 1, 40 }, 57 | { 1, 4 }, 58 | { 1, 5 }, 59 | { 1, 6 }, 60 | { 1, 8 }, 61 | { 0, 40 }, 62 | { 1, 10 }, 63 | { 1, 11 }, 64 | { 1, 9 }, 65 | { 1, 13 }, 66 | { 0, 51 }, 67 | { 0, 12 }, 68 | { 0, 52 }, 69 | { 0, 53 }, 70 | { 0, 11 }, 71 | { 0, 2 }, 72 | { 0, 3 }, 73 | { 0, 4 }, 74 | { 0, 5 }, 75 | { 0, 6 }, 76 | { 0, 7 }, 77 | { 0, 8 }, 78 | { 0, 9 }, 79 | { 0, 10 }, 80 | { 1, 39 }, 81 | { 0, 39 }, 82 | { 1, 51 }, 83 | { 0, 13 }, 84 | { 1, 52 }, 85 | { 1, 53 }, 86 | { 1, 3 }, 87 | { 1, 30 }, 88 | { 1, 48 }, 89 | { 1, 46 }, 90 | { 1, 32 }, 91 | { 1, 18 }, 92 | { 1, 33 }, 93 | { 1, 34 }, 94 | { 1, 35 }, 95 | { 1, 23 }, 96 | { 1, 36 }, 97 | { 1, 37 }, 98 | { 1, 38 }, 99 | { 1, 50 }, 100 | { 1, 49 }, 101 | { 1, 24 }, 102 | { 1, 25 }, 103 | { 1, 16 }, 104 | { 1, 19 }, 105 | { 1, 31 }, 106 | { 1, 20 }, 107 | { 1, 22 }, 108 | { 1, 47 }, 109 | { 1, 17 }, 110 | { 1, 45 }, 111 | { 1, 21 }, 112 | { 1, 44 }, 113 | { 0, 26 }, 114 | { 0, 43 }, 115 | { 0, 27 }, 116 | { 1, 7 }, 117 | { 1, 12 }, 118 | { 0, 41 }, 119 | { 0, 30 }, 120 | { 0, 48 }, 121 | { 0, 46 }, 122 | { 0, 32 }, 123 | { 0, 18 }, 124 | { 0, 33 }, 125 | { 0, 34 }, 126 | { 0, 35 }, 127 | { 0, 23 }, 128 | { 0, 36 }, 129 | { 0, 37 }, 130 | { 0, 38 }, 131 | { 0, 50 }, 132 | { 0, 49 }, 133 | { 0, 24 }, 134 | { 0, 25 }, 135 | { 0, 16 }, 136 | { 0, 19 }, 137 | { 0, 31 }, 138 | { 0, 20 }, 139 | { 0, 22 }, 140 | { 0, 47 }, 141 | { 0, 17 }, 142 | { 0, 45 }, 143 | { 0, 21 }, 144 | { 0, 44 }, 145 | { 1, 26 }, 146 | { 1, 43 }, 147 | { 1, 27 }, 148 | { 1, 41 }, 149 | { 1, 14 }, 150 | { 0, 0 }, 151 | { 0, 0 }, 152 | { 0, 0 }, 153 | { 0, 0 }, 154 | { 0, 0 }, 155 | { 0, 0 }, 156 | { 0, 0 }, 157 | { 0, 0 }, 158 | { 0, 0 }, 159 | { 0, 0 }, 160 | { 0, 0 }, 161 | { 0, 0 }, 162 | { 0, 0 }, 163 | { 0, 0 }, 164 | { 0, 0 }, 165 | { 0, 0 }, 166 | { 0, 0 }, 167 | { 0, 0 }, 168 | { 0, 0 }, 169 | { 0, 0 }, 170 | { 0, 0 }, 171 | { 0, 0 }, 172 | { 0, 0 }, 173 | { 0, 0 }, 174 | { 0, 0 }, 175 | { 0, 0 }, 176 | { 0, 0 }, 177 | { 0, 0 }, 178 | { 0, 0 }, 179 | { 0, 0 }, 180 | { 0, 0 }, 181 | { 0, 0 }, 182 | { 0, 0 }, 183 | { 0, 0 }, 184 | { 0, 0 }, 185 | { 0, 0 }, 186 | { 0, 0 }, 187 | { 0, 0 }, 188 | { 0, 0 }, 189 | { 0, 0 }, 190 | { 0, 0 }, 191 | { 0, 0 }, 192 | { 0, 0 }, 193 | { 0, 0 }, 194 | { 0, 0 }, 195 | { 0, 0 }, 196 | { 0, 0 }, 197 | { 0, 0 }, 198 | { 0, 0 }, 199 | { 0, 0 }, 200 | { 0, 0 }, 201 | { 0, 0 }, 202 | { 0, 0 }, 203 | { 0, 0 }, 204 | { 0, 0 }, 205 | { 0, 0 }, 206 | { 0, 0 }, 207 | { 0, 0 }, 208 | { 0, 0 }, 209 | { 0, 0 }, 210 | { 0, 0 }, 211 | { 0, 0 }, 212 | { 0, 0 }, 213 | { 0, 0 }, 214 | { 0, 0 }, 215 | { 0, 0 }, 216 | { 0, 0 }, 217 | { 0, 0 }, 218 | { 0, 0 }, 219 | { 0, 0 }, 220 | { 0, 0 }, 221 | { 0, 0 }, 222 | { 0, 0 }, 223 | { 0, 0 }, 224 | { 0, 0 }, 225 | { 0, 0 }, 226 | { 0, 0 }, 227 | { 0, 0 }, 228 | { 0, 0 }, 229 | { 0, 0 }, 230 | { 0, 0 }, 231 | { 0, 0 }, 232 | { 0, 0 }, 233 | { 0, 0 }, 234 | { 0, 0 }, 235 | { 0, 0 }, 236 | { 0, 0 }, 237 | { 0, 0 }, 238 | { 0, 0 }, 239 | { 0, 0 }, 240 | { 0, 0 }, 241 | { 0, 0 }, 242 | { 0, 0 }, 243 | { 0, 0 }, 244 | { 0, 0 }, 245 | { 0, 0 }, 246 | { 0, 0 }, 247 | { 0, 0 }, 248 | { 0, 0 }, 249 | { 0, 0 }, 250 | { 0, 0 }, 251 | { 0, 0 }, 252 | { 0, 0 }, 253 | { 0, 0 }, 254 | { 0, 0 }, 255 | { 0, 0 }, 256 | { 0, 0 }, 257 | { 0, 0 }, 258 | { 0, 0 }, 259 | { 0, 0 }, 260 | { 0, 0 }, 261 | { 0, 0 }, 262 | { 0, 0 }, 263 | { 0, 0 }, 264 | { 0, 0 }, 265 | { 0, 0 }, 266 | { 0, 0 }, 267 | { 0, 0 }, 268 | { 0, 0 }, 269 | { 0, 0 }, 270 | { 0, 0 }, 271 | { 0, 0 }, 272 | { 0, 0 }, 273 | { 0, 0 }, 274 | { 0, 0 }, 275 | { 0, 0 }, 276 | { 0, 0 }, 277 | { 0, 0 }, 278 | }; 279 | -------------------------------------------------------------------------------- /src/deckrypt_input.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | 14 | #include "uitype.h" 15 | 16 | // Threshold after a button becomes a hold-button (milliseconds) 17 | #define THRESHOLD 250 18 | 19 | // Set this to fit the longest name in the buttons struct below 20 | #define MAX_NAME_LEN 5 21 | 22 | typedef struct Button { 23 | // linux event code 24 | uint16_t code; 25 | char name[MAX_NAME_LEN + 1]; 26 | bool pressed; 27 | int64_t time_pressed; 28 | int64_t time_released; 29 | } Button; 30 | 31 | typedef struct Axis { 32 | // linux event code 33 | uint16_t code; 34 | // An axis can be "translated" to two buttons. E.g. the horizontal D-pad axis 35 | // to buttons for left and right. These two buttons correspond to X and Y here. 36 | char nameX[MAX_NAME_LEN + 1]; 37 | char nameY[MAX_NAME_LEN + 1]; 38 | // press 39 | int16_t valueX; 40 | int16_t valueY; 41 | // release 42 | int16_t value0; 43 | } Axis; 44 | 45 | // Use evtest to find which events are supported by a controller. 46 | // Buttons not listed here are ignored. 47 | #define ENTER_BUTTON BTN_BASE4 48 | #define CLEAR_BUTTON BTN_BASE3 49 | static Button buttons[] = { 50 | { .code = BTN_TRIGGER, .name = "TRIG", .pressed = false }, 51 | { .code = BTN_THUMB, .name = "THMB", .pressed = false }, 52 | { .code = BTN_THUMB2, .name = "THMB2", .pressed = false }, 53 | { .code = BTN_TOP, .name = "TOP", .pressed = false }, 54 | { .code = BTN_TOP2, .name = "TOP2", .pressed = false }, 55 | { .code = BTN_PINKIE, .name = "PINK", .pressed = false }, 56 | { .code = BTN_BASE, .name = "BASE", .pressed = false }, 57 | { .code = BTN_BASE2, .name = "BASE2", .pressed = false }, 58 | { .code = BTN_BASE5, .name = "BASE5", .pressed = false }, 59 | { .code = BTN_BASE6, .name = "BASE6", .pressed = false }, 60 | // These "buttons" are translated from the axes below, names have to match 61 | { .code = 0xffff, .name = "D-RI", .pressed = false }, 62 | { .code = 0xffff, .name = "D-LE", .pressed = false }, 63 | { .code = 0xffff, .name = "D-UP", .pressed = false }, 64 | { .code = 0xffff, .name = "D-DO", .pressed = false }, 65 | { .code = 0xffff, .name = "L-RI", .pressed = false }, 66 | { .code = 0xffff, .name = "L-LE", .pressed = false }, 67 | { .code = 0xffff, .name = "L-UP", .pressed = false }, 68 | { .code = 0xffff, .name = "L-DO", .pressed = false }, 69 | { .code = 0xffff, .name = "R-RI", .pressed = false }, 70 | { .code = 0xffff, .name = "R-LE", .pressed = false }, 71 | { .code = 0xffff, .name = "R-UP", .pressed = false }, 72 | { .code = 0xffff, .name = "R-DO", .pressed = false }, 73 | }; 74 | 75 | static Axis axes[] = { 76 | { 77 | .code = ABS_HAT0X, 78 | .nameX = "D-LE", .nameY = "D-RI", 79 | .valueX = -1, .value0 = 0, .valueY = 1 80 | }, 81 | { 82 | .code = ABS_HAT0Y, 83 | .nameX = "D-UP", .nameY = "D-DO", 84 | .valueX = -1, .value0 = 0, .valueY = 1 85 | }, 86 | { 87 | .code = ABS_X, 88 | .nameX = "L-LE", .nameY = "L-RI", 89 | .valueX = 0, .value0 = 128, .valueY = 255 90 | }, 91 | { 92 | .code = ABS_Y, 93 | .nameX = "L-UP", .nameY = "L-DO", 94 | .valueX = 0, .value0 = 128, .valueY = 255 95 | }, 96 | { 97 | .code = ABS_Z, 98 | .nameX = "R-LE", .nameY = "R-RI", 99 | .valueX = 0, .value0 = 128, .valueY = 255 100 | }, 101 | { 102 | .code = ABS_RZ, 103 | .nameX = "R-UP", .nameY = "R-DO", 104 | .valueX = 0, .value0 = 128, .valueY = 255 105 | }, 106 | }; 107 | 108 | static const size_t n_buttons = sizeof(buttons) / sizeof(Button); 109 | static const size_t n_axes = sizeof(axes) / sizeof(Axis); 110 | 111 | static struct timeval start_time; 112 | 113 | // Convert the timestamp of an event to milliseconds since the program started 114 | static int64_t time2millis(struct timeval t) { 115 | int64_t secs_diff = t.tv_sec - start_time.tv_sec; 116 | int64_t usecs_diff; 117 | if (t.tv_usec >= start_time.tv_usec) { 118 | usecs_diff = t.tv_usec - start_time.tv_usec; 119 | } 120 | else { 121 | usecs_diff = 1000000 - (start_time.tv_usec - t.tv_usec); 122 | secs_diff--; 123 | } 124 | return secs_diff * 1000 + usecs_diff / 1000; 125 | } 126 | 127 | static Button* button_from_code(uint16_t code) { 128 | for (size_t i = 0; i < n_buttons; i++) { 129 | if (code == buttons[i].code) { 130 | return &buttons[i]; 131 | } 132 | } 133 | return NULL; 134 | } 135 | 136 | static Button* button_from_name(char *name) { 137 | for (size_t i = 0; i < n_buttons; i++) { 138 | if (strncmp(name, buttons[i].name, MAX_NAME_LEN) == 0) { 139 | return &buttons[i]; 140 | } 141 | } 142 | return NULL; 143 | } 144 | 145 | // Argument Button *b: The released button that concludes the combination 146 | static void combination(Button *b) { 147 | char buffer[n_buttons * (MAX_NAME_LEN + 1)]; 148 | buffer[0] = '\0'; 149 | // Check for hold-buttons 150 | // A button becomes a hold-button if it 151 | // * is pressed for at least the threshold time, and 152 | // * was pressed before the released button b. 153 | for (size_t i = 0; i < n_buttons; i++) { 154 | if (buttons[i].pressed && 155 | b->time_released - buttons[i].time_pressed > THRESHOLD && 156 | b->time_pressed > buttons[i].time_pressed) { 157 | if (strnlen(buffer, 1) == 0) { 158 | strcat(buffer, buttons[i].name); 159 | } 160 | else { 161 | strcat(buffer, "+"); 162 | strcat(buffer, buttons[i].name); 163 | } 164 | } 165 | } 166 | if (strnlen(buffer, 1) == 0) { 167 | strcat(buffer, b->name); 168 | } 169 | else { 170 | strcat(buffer, "+"); 171 | strcat(buffer, b->name); 172 | } 173 | 174 | strcat(buffer, ";"); 175 | uitype_type(buffer); 176 | } 177 | 178 | static void handle_button(struct input_event *ev) { 179 | Button *button = button_from_code(ev->code); 180 | if (button == NULL) return; 181 | 182 | if (ev->value == 1) { 183 | button->pressed = true; 184 | button->time_pressed = time2millis(ev->time); 185 | } 186 | else if (ev->value == 0) { 187 | button->pressed = false; 188 | button->time_released = time2millis(ev->time); 189 | if (button->time_released - button->time_pressed < THRESHOLD) { 190 | combination(button); 191 | } 192 | } 193 | } 194 | 195 | static void handle_axis(struct input_event *ev) { 196 | for (size_t i = 0; i < n_axes; i++) { 197 | if (ev->code == axes[i].code) { 198 | Button *button; 199 | if (ev->value == axes[i].valueX) { 200 | button = button_from_name(axes[i].nameX); 201 | button->pressed = true; 202 | button->time_pressed = time2millis(ev->time); 203 | } else if (ev->value == axes[i].valueY) { 204 | button = button_from_name(axes[i].nameY); 205 | button->pressed = true; 206 | button->time_pressed = time2millis(ev->time); 207 | } else if (ev->value == axes[i].value0) { 208 | // One of the two "buttons" of the axis was released 209 | button = button_from_name(axes[i].nameX); 210 | if (!button->pressed) { 211 | button = button_from_name(axes[i].nameY); 212 | } 213 | button->pressed = false; 214 | button->time_released = time2millis(ev->time); 215 | if (button->time_released - button->time_pressed < THRESHOLD) { 216 | combination(button); 217 | } 218 | } 219 | } 220 | } 221 | } 222 | 223 | static int is_event_device(const struct dirent *dir) { 224 | return strncmp("event", dir->d_name, 5) == 0; 225 | } 226 | 227 | static bool find_device(struct libevdev** device) { 228 | struct dirent **namelist; 229 | int n_devices = scandir("/dev/input/", &namelist, is_event_device, NULL); 230 | for (int i = 0; i < n_devices; i++) { 231 | char *device_path = calloc(strlen("/dev/input/") + namelist[i]->d_reclen + 1, 232 | sizeof(char)); 233 | sprintf(device_path, "%s%s", "/dev/input/", namelist[i]->d_name); 234 | 235 | int fd = open(device_path, O_RDONLY|O_NONBLOCK); 236 | free(device_path); 237 | 238 | if (libevdev_new_from_fd(fd, device) == 0) { 239 | if (libevdev_has_event_code(*device, EV_KEY, ENTER_BUTTON)) { 240 | for (int j = i; j < n_devices; j++) { 241 | free(namelist[j]); 242 | } 243 | free(namelist); 244 | return true; 245 | } 246 | else { 247 | libevdev_free(*device); 248 | *device = NULL; 249 | } 250 | } 251 | close(fd); 252 | free(namelist[i]); 253 | } 254 | free(namelist); 255 | return false; 256 | } 257 | 258 | 259 | static volatile bool terminate = false; 260 | static void signal_handler(int signum) { terminate = true; } 261 | 262 | int main() { 263 | gettimeofday(&start_time, NULL); 264 | 265 | if (uitype_init() != 0) { 266 | return 1; 267 | }; 268 | 269 | struct libevdev *device = NULL; 270 | while (true) { 271 | signal(SIGINT, signal_handler); 272 | signal(SIGTERM, signal_handler); 273 | if (terminate) break; 274 | 275 | if (device == NULL) { 276 | find_device(&device); 277 | } 278 | else { 279 | struct input_event ev; 280 | int rc = libevdev_next_event(device, LIBEVDEV_READ_FLAG_NORMAL, &ev); 281 | if (rc == 0) { 282 | switch (ev.type) { 283 | case EV_KEY: 284 | if (ev.value == 0) { 285 | if (ev.code == ENTER_BUTTON) { 286 | uitype_enter(); 287 | } 288 | else if (ev.code == CLEAR_BUTTON) { 289 | uitype_ctrlu(); 290 | } 291 | } 292 | handle_button(&ev); 293 | break; 294 | case EV_ABS: 295 | handle_axis(&ev); 296 | break; 297 | } 298 | } 299 | } 300 | } 301 | 302 | // Cleanup 303 | if (device != NULL) { 304 | libevdev_free(device); 305 | } 306 | uitype_deinit(); 307 | 308 | return 0; 309 | } 310 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. We, the Free Software Foundation, use the 18 | GNU General Public License for most of our software; it applies also to 19 | any other work released this way by its authors. You can apply it to 20 | your programs, too. 21 | 22 | When we speak of free software, we are referring to freedom, not 23 | price. Our General Public Licenses are designed to make sure that you 24 | have the freedom to distribute copies of free software (and charge for 25 | them if you wish), that you receive source code or can get it if you 26 | want it, that you can change the software or use pieces of it in new 27 | free programs, and that you know you can do these things. 28 | 29 | To protect your rights, we need to prevent others from denying you 30 | these rights or asking you to surrender the rights. Therefore, you have 31 | certain responsibilities if you distribute copies of the software, or if 32 | you modify it: responsibilities to respect the freedom of others. 33 | 34 | For example, if you distribute copies of such a program, whether 35 | gratis or for a fee, you must pass on to the recipients the same 36 | freedoms that you received. You must make sure that they, too, receive 37 | or can get the source code. And you must show them these terms so they 38 | know their rights. 39 | 40 | Developers that use the GNU GPL protect your rights with two steps: 41 | (1) assert copyright on the software, and (2) offer you this License 42 | giving you legal permission to copy, distribute and/or modify it. 43 | 44 | For the developers' and authors' protection, the GPL clearly explains 45 | that there is no warranty for this free software. For both users' and 46 | authors' sake, the GPL requires that modified versions be marked as 47 | changed, so that their problems will not be attributed erroneously to 48 | authors of previous versions. 49 | 50 | Some devices are designed to deny users access to install or run 51 | modified versions of the software inside them, although the manufacturer 52 | can do so. This is fundamentally incompatible with the aim of 53 | protecting users' freedom to change the software. The systematic 54 | pattern of such abuse occurs in the area of products for individuals to 55 | use, which is precisely where it is most unacceptable. Therefore, we 56 | have designed this version of the GPL to prohibit the practice for those 57 | products. If such problems arise substantially in other domains, we 58 | stand ready to extend this provision to those domains in future versions 59 | of the GPL, as needed to protect the freedom of users. 60 | 61 | Finally, every program is threatened constantly by software patents. 62 | States should not allow patents to restrict development and use of 63 | software on general-purpose computers, but in those that do, we wish to 64 | avoid the special danger that patents applied to a free program could 65 | make it effectively proprietary. To prevent this, the GPL assures that 66 | patents cannot be used to render the program non-free. 67 | 68 | The precise terms and conditions for copying, distribution and 69 | modification follow. 70 | 71 | TERMS AND CONDITIONS 72 | 73 | 0. Definitions. 74 | 75 | "This License" refers to version 3 of the GNU General Public License. 76 | 77 | "Copyright" also means copyright-like laws that apply to other kinds of 78 | works, such as semiconductor masks. 79 | 80 | "The Program" refers to any copyrightable work licensed under this 81 | License. Each licensee is addressed as "you". "Licensees" and 82 | "recipients" may be individuals or organizations. 83 | 84 | To "modify" a work means to copy from or adapt all or part of the work 85 | in a fashion requiring copyright permission, other than the making of an 86 | exact copy. The resulting work is called a "modified version" of the 87 | earlier work or a work "based on" the earlier work. 88 | 89 | A "covered work" means either the unmodified Program or a work based 90 | on the Program. 91 | 92 | To "propagate" a work means to do anything with it that, without 93 | permission, would make you directly or secondarily liable for 94 | infringement under applicable copyright law, except executing it on a 95 | computer or modifying a private copy. Propagation includes copying, 96 | distribution (with or without modification), making available to the 97 | public, and in some countries other activities as well. 98 | 99 | To "convey" a work means any kind of propagation that enables other 100 | parties to make or receive copies. Mere interaction with a user through 101 | a computer network, with no transfer of a copy, is not conveying. 102 | 103 | An interactive user interface displays "Appropriate Legal Notices" 104 | to the extent that it includes a convenient and prominently visible 105 | feature that (1) displays an appropriate copyright notice, and (2) 106 | tells the user that there is no warranty for the work (except to the 107 | extent that warranties are provided), that licensees may convey the 108 | work under this License, and how to view a copy of this License. If 109 | the interface presents a list of user commands or options, such as a 110 | menu, a prominent item in the list meets this criterion. 111 | 112 | 1. Source Code. 113 | 114 | The "source code" for a work means the preferred form of the work 115 | for making modifications to it. "Object code" means any non-source 116 | form of a work. 117 | 118 | A "Standard Interface" means an interface that either is an official 119 | standard defined by a recognized standards body, or, in the case of 120 | interfaces specified for a particular programming language, one that 121 | is widely used among developers working in that language. 122 | 123 | The "System Libraries" of an executable work include anything, other 124 | than the work as a whole, that (a) is included in the normal form of 125 | packaging a Major Component, but which is not part of that Major 126 | Component, and (b) serves only to enable use of the work with that 127 | Major Component, or to implement a Standard Interface for which an 128 | implementation is available to the public in source code form. A 129 | "Major Component", in this context, means a major essential component 130 | (kernel, window system, and so on) of the specific operating system 131 | (if any) on which the executable work runs, or a compiler used to 132 | produce the work, or an object code interpreter used to run it. 133 | 134 | The "Corresponding Source" for a work in object code form means all 135 | the source code needed to generate, install, and (for an executable 136 | work) run the object code and to modify the work, including scripts to 137 | control those activities. However, it does not include the work's 138 | System Libraries, or general-purpose tools or generally available free 139 | programs which are used unmodified in performing those activities but 140 | which are not part of the work. For example, Corresponding Source 141 | includes interface definition files associated with source files for 142 | the work, and the source code for shared libraries and dynamically 143 | linked subprograms that the work is specifically designed to require, 144 | such as by intimate data communication or control flow between those 145 | subprograms and other parts of the work. 146 | 147 | The Corresponding Source need not include anything that users 148 | can regenerate automatically from other parts of the Corresponding 149 | Source. 150 | 151 | The Corresponding Source for a work in source code form is that 152 | same work. 153 | 154 | 2. Basic Permissions. 155 | 156 | All rights granted under this License are granted for the term of 157 | copyright on the Program, and are irrevocable provided the stated 158 | conditions are met. This License explicitly affirms your unlimited 159 | permission to run the unmodified Program. The output from running a 160 | covered work is covered by this License only if the output, given its 161 | content, constitutes a covered work. This License acknowledges your 162 | rights of fair use or other equivalent, as provided by copyright law. 163 | 164 | You may make, run and propagate covered works that you do not 165 | convey, without conditions so long as your license otherwise remains 166 | in force. You may convey covered works to others for the sole purpose 167 | of having them make modifications exclusively for you, or provide you 168 | with facilities for running those works, provided that you comply with 169 | the terms of this License in conveying all material for which you do 170 | not control copyright. Those thus making or running the covered works 171 | for you must do so exclusively on your behalf, under your direction 172 | and control, on terms that prohibit them from making any copies of 173 | your copyrighted material outside their relationship with you. 174 | 175 | Conveying under any other circumstances is permitted solely under 176 | the conditions stated below. Sublicensing is not allowed; section 10 177 | makes it unnecessary. 178 | 179 | 3. Protecting Users' Legal Rights From Anti-Circumvention Law. 180 | 181 | No covered work shall be deemed part of an effective technological 182 | measure under any applicable law fulfilling obligations under article 183 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or 184 | similar laws prohibiting or restricting circumvention of such 185 | measures. 186 | 187 | When you convey a covered work, you waive any legal power to forbid 188 | circumvention of technological measures to the extent such circumvention 189 | is effected by exercising rights under this License with respect to 190 | the covered work, and you disclaim any intention to limit operation or 191 | modification of the work as a means of enforcing, against the work's 192 | users, your or third parties' legal rights to forbid circumvention of 193 | technological measures. 194 | 195 | 4. Conveying Verbatim Copies. 196 | 197 | You may convey verbatim copies of the Program's source code as you 198 | receive it, in any medium, provided that you conspicuously and 199 | appropriately publish on each copy an appropriate copyright notice; 200 | keep intact all notices stating that this License and any 201 | non-permissive terms added in accord with section 7 apply to the code; 202 | keep intact all notices of the absence of any warranty; and give all 203 | recipients a copy of this License along with the Program. 204 | 205 | You may charge any price or no price for each copy that you convey, 206 | and you may offer support or warranty protection for a fee. 207 | 208 | 5. Conveying Modified Source Versions. 209 | 210 | You may convey a work based on the Program, or the modifications to 211 | produce it from the Program, in the form of source code under the 212 | terms of section 4, provided that you also meet all of these conditions: 213 | 214 | a) The work must carry prominent notices stating that you modified 215 | it, and giving a relevant date. 216 | 217 | b) The work must carry prominent notices stating that it is 218 | released under this License and any conditions added under section 219 | 7. This requirement modifies the requirement in section 4 to 220 | "keep intact all notices". 221 | 222 | c) You must license the entire work, as a whole, under this 223 | License to anyone who comes into possession of a copy. This 224 | License will therefore apply, along with any applicable section 7 225 | additional terms, to the whole of the work, and all its parts, 226 | regardless of how they are packaged. This License gives no 227 | permission to license the work in any other way, but it does not 228 | invalidate such permission if you have separately received it. 229 | 230 | d) If the work has interactive user interfaces, each must display 231 | Appropriate Legal Notices; however, if the Program has interactive 232 | interfaces that do not display Appropriate Legal Notices, your 233 | work need not make them do so. 234 | 235 | A compilation of a covered work with other separate and independent 236 | works, which are not by their nature extensions of the covered work, 237 | and which are not combined with it such as to form a larger program, 238 | in or on a volume of a storage or distribution medium, is called an 239 | "aggregate" if the compilation and its resulting copyright are not 240 | used to limit the access or legal rights of the compilation's users 241 | beyond what the individual works permit. Inclusion of a covered work 242 | in an aggregate does not cause this License to apply to the other 243 | parts of the aggregate. 244 | 245 | 6. Conveying Non-Source Forms. 246 | 247 | You may convey a covered work in object code form under the terms 248 | of sections 4 and 5, provided that you also convey the 249 | machine-readable Corresponding Source under the terms of this License, 250 | in one of these ways: 251 | 252 | a) Convey the object code in, or embodied in, a physical product 253 | (including a physical distribution medium), accompanied by the 254 | Corresponding Source fixed on a durable physical medium 255 | customarily used for software interchange. 256 | 257 | b) Convey the object code in, or embodied in, a physical product 258 | (including a physical distribution medium), accompanied by a 259 | written offer, valid for at least three years and valid for as 260 | long as you offer spare parts or customer support for that product 261 | model, to give anyone who possesses the object code either (1) a 262 | copy of the Corresponding Source for all the software in the 263 | product that is covered by this License, on a durable physical 264 | medium customarily used for software interchange, for a price no 265 | more than your reasonable cost of physically performing this 266 | conveying of source, or (2) access to copy the 267 | Corresponding Source from a network server at no charge. 268 | 269 | c) Convey individual copies of the object code with a copy of the 270 | written offer to provide the Corresponding Source. This 271 | alternative is allowed only occasionally and noncommercially, and 272 | only if you received the object code with such an offer, in accord 273 | with subsection 6b. 274 | 275 | d) Convey the object code by offering access from a designated 276 | place (gratis or for a charge), and offer equivalent access to the 277 | Corresponding Source in the same way through the same place at no 278 | further charge. You need not require recipients to copy the 279 | Corresponding Source along with the object code. If the place to 280 | copy the object code is a network server, the Corresponding Source 281 | may be on a different server (operated by you or a third party) 282 | that supports equivalent copying facilities, provided you maintain 283 | clear directions next to the object code saying where to find the 284 | Corresponding Source. Regardless of what server hosts the 285 | Corresponding Source, you remain obligated to ensure that it is 286 | available for as long as needed to satisfy these requirements. 287 | 288 | e) Convey the object code using peer-to-peer transmission, provided 289 | you inform other peers where the object code and Corresponding 290 | Source of the work are being offered to the general public at no 291 | charge under subsection 6d. 292 | 293 | A separable portion of the object code, whose source code is excluded 294 | from the Corresponding Source as a System Library, need not be 295 | included in conveying the object code work. 296 | 297 | A "User Product" is either (1) a "consumer product", which means any 298 | tangible personal property which is normally used for personal, family, 299 | or household purposes, or (2) anything designed or sold for incorporation 300 | into a dwelling. In determining whether a product is a consumer product, 301 | doubtful cases shall be resolved in favor of coverage. For a particular 302 | product received by a particular user, "normally used" refers to a 303 | typical or common use of that class of product, regardless of the status 304 | of the particular user or of the way in which the particular user 305 | actually uses, or expects or is expected to use, the product. A product 306 | is a consumer product regardless of whether the product has substantial 307 | commercial, industrial or non-consumer uses, unless such uses represent 308 | the only significant mode of use of the product. 309 | 310 | "Installation Information" for a User Product means any methods, 311 | procedures, authorization keys, or other information required to install 312 | and execute modified versions of a covered work in that User Product from 313 | a modified version of its Corresponding Source. The information must 314 | suffice to ensure that the continued functioning of the modified object 315 | code is in no case prevented or interfered with solely because 316 | modification has been made. 317 | 318 | If you convey an object code work under this section in, or with, or 319 | specifically for use in, a User Product, and the conveying occurs as 320 | part of a transaction in which the right of possession and use of the 321 | User Product is transferred to the recipient in perpetuity or for a 322 | fixed term (regardless of how the transaction is characterized), the 323 | Corresponding Source conveyed under this section must be accompanied 324 | by the Installation Information. But this requirement does not apply 325 | if neither you nor any third party retains the ability to install 326 | modified object code on the User Product (for example, the work has 327 | been installed in ROM). 328 | 329 | The requirement to provide Installation Information does not include a 330 | requirement to continue to provide support service, warranty, or updates 331 | for a work that has been modified or installed by the recipient, or for 332 | the User Product in which it has been modified or installed. Access to a 333 | network may be denied when the modification itself materially and 334 | adversely affects the operation of the network or violates the rules and 335 | protocols for communication across the network. 336 | 337 | Corresponding Source conveyed, and Installation Information provided, 338 | in accord with this section must be in a format that is publicly 339 | documented (and with an implementation available to the public in 340 | source code form), and must require no special password or key for 341 | unpacking, reading or copying. 342 | 343 | 7. Additional Terms. 344 | 345 | "Additional permissions" are terms that supplement the terms of this 346 | License by making exceptions from one or more of its conditions. 347 | Additional permissions that are applicable to the entire Program shall 348 | be treated as though they were included in this License, to the extent 349 | that they are valid under applicable law. If additional permissions 350 | apply only to part of the Program, that part may be used separately 351 | under those permissions, but the entire Program remains governed by 352 | this License without regard to the additional permissions. 353 | 354 | When you convey a copy of a covered work, you may at your option 355 | remove any additional permissions from that copy, or from any part of 356 | it. (Additional permissions may be written to require their own 357 | removal in certain cases when you modify the work.) You may place 358 | additional permissions on material, added by you to a covered work, 359 | for which you have or can give appropriate copyright permission. 360 | 361 | Notwithstanding any other provision of this License, for material you 362 | add to a covered work, you may (if authorized by the copyright holders of 363 | that material) supplement the terms of this License with terms: 364 | 365 | a) Disclaiming warranty or limiting liability differently from the 366 | terms of sections 15 and 16 of this License; or 367 | 368 | b) Requiring preservation of specified reasonable legal notices or 369 | author attributions in that material or in the Appropriate Legal 370 | Notices displayed by works containing it; or 371 | 372 | c) Prohibiting misrepresentation of the origin of that material, or 373 | requiring that modified versions of such material be marked in 374 | reasonable ways as different from the original version; or 375 | 376 | d) Limiting the use for publicity purposes of names of licensors or 377 | authors of the material; or 378 | 379 | e) Declining to grant rights under trademark law for use of some 380 | trade names, trademarks, or service marks; or 381 | 382 | f) Requiring indemnification of licensors and authors of that 383 | material by anyone who conveys the material (or modified versions of 384 | it) with contractual assumptions of liability to the recipient, for 385 | any liability that these contractual assumptions directly impose on 386 | those licensors and authors. 387 | 388 | All other non-permissive additional terms are considered "further 389 | restrictions" within the meaning of section 10. If the Program as you 390 | received it, or any part of it, contains a notice stating that it is 391 | governed by this License along with a term that is a further 392 | restriction, you may remove that term. If a license document contains 393 | a further restriction but permits relicensing or conveying under this 394 | License, you may add to a covered work material governed by the terms 395 | of that license document, provided that the further restriction does 396 | not survive such relicensing or conveying. 397 | 398 | If you add terms to a covered work in accord with this section, you 399 | must place, in the relevant source files, a statement of the 400 | additional terms that apply to those files, or a notice indicating 401 | where to find the applicable terms. 402 | 403 | Additional terms, permissive or non-permissive, may be stated in the 404 | form of a separately written license, or stated as exceptions; 405 | the above requirements apply either way. 406 | 407 | 8. Termination. 408 | 409 | You may not propagate or modify a covered work except as expressly 410 | provided under this License. Any attempt otherwise to propagate or 411 | modify it is void, and will automatically terminate your rights under 412 | this License (including any patent licenses granted under the third 413 | paragraph of section 11). 414 | 415 | However, if you cease all violation of this License, then your 416 | license from a particular copyright holder is reinstated (a) 417 | provisionally, unless and until the copyright holder explicitly and 418 | finally terminates your license, and (b) permanently, if the copyright 419 | holder fails to notify you of the violation by some reasonable means 420 | prior to 60 days after the cessation. 421 | 422 | Moreover, your license from a particular copyright holder is 423 | reinstated permanently if the copyright holder notifies you of the 424 | violation by some reasonable means, this is the first time you have 425 | received notice of violation of this License (for any work) from that 426 | copyright holder, and you cure the violation prior to 30 days after 427 | your receipt of the notice. 428 | 429 | Termination of your rights under this section does not terminate the 430 | licenses of parties who have received copies or rights from you under 431 | this License. If your rights have been terminated and not permanently 432 | reinstated, you do not qualify to receive new licenses for the same 433 | material under section 10. 434 | 435 | 9. Acceptance Not Required for Having Copies. 436 | 437 | You are not required to accept this License in order to receive or 438 | run a copy of the Program. Ancillary propagation of a covered work 439 | occurring solely as a consequence of using peer-to-peer transmission 440 | to receive a copy likewise does not require acceptance. However, 441 | nothing other than this License grants you permission to propagate or 442 | modify any covered work. These actions infringe copyright if you do 443 | not accept this License. Therefore, by modifying or propagating a 444 | covered work, you indicate your acceptance of this License to do so. 445 | 446 | 10. Automatic Licensing of Downstream Recipients. 447 | 448 | Each time you convey a covered work, the recipient automatically 449 | receives a license from the original licensors, to run, modify and 450 | propagate that work, subject to this License. You are not responsible 451 | for enforcing compliance by third parties with this License. 452 | 453 | An "entity transaction" is a transaction transferring control of an 454 | organization, or substantially all assets of one, or subdividing an 455 | organization, or merging organizations. If propagation of a covered 456 | work results from an entity transaction, each party to that 457 | transaction who receives a copy of the work also receives whatever 458 | licenses to the work the party's predecessor in interest had or could 459 | give under the previous paragraph, plus a right to possession of the 460 | Corresponding Source of the work from the predecessor in interest, if 461 | the predecessor has it or can get it with reasonable efforts. 462 | 463 | You may not impose any further restrictions on the exercise of the 464 | rights granted or affirmed under this License. For example, you may 465 | not impose a license fee, royalty, or other charge for exercise of 466 | rights granted under this License, and you may not initiate litigation 467 | (including a cross-claim or counterclaim in a lawsuit) alleging that 468 | any patent claim is infringed by making, using, selling, offering for 469 | sale, or importing the Program or any portion of it. 470 | 471 | 11. Patents. 472 | 473 | A "contributor" is a copyright holder who authorizes use under this 474 | License of the Program or a work on which the Program is based. The 475 | work thus licensed is called the contributor's "contributor version". 476 | 477 | A contributor's "essential patent claims" are all patent claims 478 | owned or controlled by the contributor, whether already acquired or 479 | hereafter acquired, that would be infringed by some manner, permitted 480 | by this License, of making, using, or selling its contributor version, 481 | but do not include claims that would be infringed only as a 482 | consequence of further modification of the contributor version. For 483 | purposes of this definition, "control" includes the right to grant 484 | patent sublicenses in a manner consistent with the requirements of 485 | this License. 486 | 487 | Each contributor grants you a non-exclusive, worldwide, royalty-free 488 | patent license under the contributor's essential patent claims, to 489 | make, use, sell, offer for sale, import and otherwise run, modify and 490 | propagate the contents of its contributor version. 491 | 492 | In the following three paragraphs, a "patent license" is any express 493 | agreement or commitment, however denominated, not to enforce a patent 494 | (such as an express permission to practice a patent or covenant not to 495 | sue for patent infringement). To "grant" such a patent license to a 496 | party means to make such an agreement or commitment not to enforce a 497 | patent against the party. 498 | 499 | If you convey a covered work, knowingly relying on a patent license, 500 | and the Corresponding Source of the work is not available for anyone 501 | to copy, free of charge and under the terms of this License, through a 502 | publicly available network server or other readily accessible means, 503 | then you must either (1) cause the Corresponding Source to be so 504 | available, or (2) arrange to deprive yourself of the benefit of the 505 | patent license for this particular work, or (3) arrange, in a manner 506 | consistent with the requirements of this License, to extend the patent 507 | license to downstream recipients. "Knowingly relying" means you have 508 | actual knowledge that, but for the patent license, your conveying the 509 | covered work in a country, or your recipient's use of the covered work 510 | in a country, would infringe one or more identifiable patents in that 511 | country that you have reason to believe are valid. 512 | 513 | If, pursuant to or in connection with a single transaction or 514 | arrangement, you convey, or propagate by procuring conveyance of, a 515 | covered work, and grant a patent license to some of the parties 516 | receiving the covered work authorizing them to use, propagate, modify 517 | or convey a specific copy of the covered work, then the patent license 518 | you grant is automatically extended to all recipients of the covered 519 | work and works based on it. 520 | 521 | A patent license is "discriminatory" if it does not include within 522 | the scope of its coverage, prohibits the exercise of, or is 523 | conditioned on the non-exercise of one or more of the rights that are 524 | specifically granted under this License. You may not convey a covered 525 | work if you are a party to an arrangement with a third party that is 526 | in the business of distributing software, under which you make payment 527 | to the third party based on the extent of your activity of conveying 528 | the work, and under which the third party grants, to any of the 529 | parties who would receive the covered work from you, a discriminatory 530 | patent license (a) in connection with copies of the covered work 531 | conveyed by you (or copies made from those copies), or (b) primarily 532 | for and in connection with specific products or compilations that 533 | contain the covered work, unless you entered into that arrangement, 534 | or that patent license was granted, prior to 28 March 2007. 535 | 536 | Nothing in this License shall be construed as excluding or limiting 537 | any implied license or other defenses to infringement that may 538 | otherwise be available to you under applicable patent law. 539 | 540 | 12. No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------