2 * Copyright © 2012 Ran Benita <ran234@gmail.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
34 #include <sys/epoll.h>
35 #include <linux/input.h>
42 struct xkb_state *state;
43 struct xkb_compose_state *compose_state;
44 struct keyboard *next;
47 static bool terminate;
48 static int evdev_offset = 8;
49 static bool report_state_changes;
50 static bool with_compose;
52 #define NLONGS(n) (((n) + LONG_BIT - 1) / LONG_BIT)
55 evdev_bit_is_set(const unsigned long *array, int bit)
57 return array[bit / LONG_BIT] & (1LL << (bit % LONG_BIT));
60 /* Some heuristics to see if the device is a keyboard. */
65 unsigned long evbits[NLONGS(EV_CNT)] = { 0 };
66 unsigned long keybits[NLONGS(KEY_CNT)] = { 0 };
69 ioctl(fd, EVIOCGBIT(0, sizeof(evbits)), evbits);
73 if (!evdev_bit_is_set(evbits, EV_KEY))
77 ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(keybits)), keybits);
81 for (i = KEY_RESERVED; i <= KEY_MIN_INTERESTING; i++)
82 if (evdev_bit_is_set(keybits, i))
89 keyboard_new(struct dirent *ent, struct xkb_keymap *keymap,
90 struct xkb_compose_table *compose_table, struct keyboard **out)
95 struct xkb_state *state;
96 struct xkb_compose_state *compose_state = NULL;
99 ret = asprintf(&path, "/dev/input/%s", ent->d_name);
103 fd = open(path, O_NONBLOCK | O_CLOEXEC | O_RDONLY);
109 if (!is_keyboard(fd)) {
110 /* Dummy "skip this device" value. */
115 state = xkb_state_new(keymap);
117 fprintf(stderr, "Couldn't create xkb state for %s\n", path);
123 compose_state = xkb_compose_state_new(compose_table,
124 XKB_COMPOSE_STATE_NO_FLAGS);
125 if (!compose_state) {
126 fprintf(stderr, "Couldn't create compose state for %s\n", path);
132 kbd = calloc(1, sizeof(*kbd));
135 goto err_compose_state;
141 kbd->compose_state = compose_state;
146 xkb_compose_state_unref(compose_state);
148 xkb_state_unref(state);
157 keyboard_free(struct keyboard *kbd)
164 xkb_state_unref(kbd->state);
165 xkb_compose_state_unref(kbd->compose_state);
170 filter_device_name(const struct dirent *ent)
172 return !fnmatch("event*", ent->d_name, 0);
175 static struct keyboard *
176 get_keyboards(struct xkb_keymap *keymap,
177 struct xkb_compose_table *compose_table)
180 struct dirent **ents;
181 struct keyboard *kbds = NULL, *kbd = NULL;
183 nents = scandir("/dev/input", &ents, filter_device_name, alphasort);
185 fprintf(stderr, "Couldn't scan /dev/input: %s\n", strerror(errno));
189 for (i = 0; i < nents; i++) {
190 ret = keyboard_new(ents[i], keymap, compose_table, &kbd);
192 if (ret == -EACCES) {
193 fprintf(stderr, "Couldn't open /dev/input/%s: %s. "
194 "You probably need root to run this.\n",
195 ents[i]->d_name, strerror(-ret));
198 if (ret != -ENOTSUP) {
199 fprintf(stderr, "Couldn't open /dev/input/%s: %s. Skipping.\n",
200 ents[i]->d_name, strerror(-ret));
210 fprintf(stderr, "Couldn't find any keyboards I can use! Quitting.\n");
215 for (i = 0; i < nents; i++)
222 free_keyboards(struct keyboard *kbds)
224 struct keyboard *next;
233 /* The meaning of the input_event 'value' field. */
235 KEY_STATE_RELEASE = 0,
237 KEY_STATE_REPEAT = 2,
241 process_event(struct keyboard *kbd, uint16_t type, uint16_t code, int32_t value)
243 xkb_keycode_t keycode;
244 struct xkb_keymap *keymap;
245 enum xkb_state_component changed;
246 enum xkb_compose_status status;
251 keycode = evdev_offset + code;
252 keymap = xkb_state_get_keymap(kbd->state);
254 if (value == KEY_STATE_REPEAT && !xkb_keymap_key_repeats(keymap, keycode))
257 if (with_compose && value != KEY_STATE_RELEASE) {
258 xkb_keysym_t keysym = xkb_state_key_get_one_sym(kbd->state, keycode);
259 xkb_compose_state_feed(kbd->compose_state, keysym);
262 if (value != KEY_STATE_RELEASE)
263 test_print_keycode_state(kbd->state, kbd->compose_state, keycode,
264 XKB_CONSUMED_MODE_XKB);
267 status = xkb_compose_state_get_status(kbd->compose_state);
268 if (status == XKB_COMPOSE_CANCELLED || status == XKB_COMPOSE_COMPOSED)
269 xkb_compose_state_reset(kbd->compose_state);
272 if (value == KEY_STATE_RELEASE)
273 changed = xkb_state_update_key(kbd->state, keycode, XKB_KEY_UP);
275 changed = xkb_state_update_key(kbd->state, keycode, XKB_KEY_DOWN);
277 if (report_state_changes)
278 test_print_state_changes(changed);
282 read_keyboard(struct keyboard *kbd)
285 struct input_event evs[16];
287 /* No fancy error checking here. */
288 while ((len = read(kbd->fd, &evs, sizeof(evs))) > 0) {
289 const size_t nevs = len / sizeof(struct input_event);
290 for (size_t i = 0; i < nevs; i++)
291 process_event(kbd, evs[i].type, evs[i].code, evs[i].value);
294 if (len < 0 && errno != EWOULDBLOCK) {
295 fprintf(stderr, "Couldn't read %s: %s\n", kbd->path, strerror(errno));
303 loop(struct keyboard *kbds)
307 struct keyboard *kbd;
308 struct epoll_event ev;
309 struct epoll_event evs[16];
311 epfd = epoll_create1(0);
313 fprintf(stderr, "Couldn't create epoll instance: %s\n",
318 for (kbd = kbds; kbd; kbd = kbd->next) {
319 memset(&ev, 0, sizeof(ev));
322 ret = epoll_ctl(epfd, EPOLL_CTL_ADD, kbd->fd, &ev);
325 fprintf(stderr, "Couldn't add %s to epoll: %s\n",
326 kbd->path, strerror(errno));
332 ret = epoll_wait(epfd, evs, 16, -1);
337 fprintf(stderr, "Couldn't poll for events: %s\n",
342 for (i = 0; i < ret; i++) {
343 kbd = evs[i].data.ptr;
344 ret = read_keyboard(kbd);
360 sigintr_handler(int signum)
366 main(int argc, char *argv[])
370 struct keyboard *kbds;
371 struct xkb_context *ctx;
372 struct xkb_keymap *keymap;
373 struct xkb_compose_table *compose_table = NULL;
374 const char *rules = NULL;
375 const char *model = NULL;
376 const char *layout = NULL;
377 const char *variant = NULL;
378 const char *options = NULL;
379 const char *keymap_path = NULL;
381 struct sigaction act;
383 setlocale(LC_ALL, "");
385 while ((opt = getopt(argc, argv, "r:m:l:v:o:k:n:cd")) != -1) {
403 keymap_path = optarg;
407 evdev_offset = strtol(optarg, NULL, 10);
409 fprintf(stderr, "error: -n option expects a number\n");
414 report_state_changes = true;
420 fprintf(stderr, " Usage: %s [-r <rules>] [-m <model>] "
421 "[-l <layout>] [-v <variant>] [-o <options>]\n",
423 fprintf(stderr, " or: %s -k <path to keymap file>\n",
425 fprintf(stderr, "For both: -n <evdev keycode offset>\n"
426 " -c (to report changes to the state)\n"
427 " -d (to enable compose)\n");
432 ctx = test_get_context(0);
435 fprintf(stderr, "Couldn't create xkb context\n");
440 FILE *file = fopen(keymap_path, "r");
443 fprintf(stderr, "Couldn't open '%s': %s\n",
444 keymap_path, strerror(errno));
447 keymap = xkb_keymap_new_from_file(ctx, file,
448 XKB_KEYMAP_FORMAT_TEXT_V1, 0);
452 keymap = test_compile_rules(ctx, rules, model, layout, variant,
458 fprintf(stderr, "Couldn't create xkb keymap\n");
463 locale = setlocale(LC_CTYPE, NULL);
465 xkb_compose_table_new_from_locale(ctx, locale,
466 XKB_COMPOSE_COMPILE_NO_FLAGS);
467 if (!compose_table) {
469 fprintf(stderr, "Couldn't create compose from locale\n");
474 kbds = get_keyboards(keymap, compose_table);
480 act.sa_handler = sigintr_handler;
481 sigemptyset(&act.sa_mask);
483 sigaction(SIGINT, &act, NULL);
484 sigaction(SIGTERM, &act, NULL);
486 test_disable_stdin_echo();
488 test_enable_stdin_echo();
490 free_keyboards(kbds);
492 xkb_compose_table_unref(compose_table);
494 xkb_keymap_unref(keymap);
496 xkb_context_unref(ctx);
498 exit(ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE);