1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 Copyright 2013 Lennart Poettering
10 //#include "alloc-util.h"
13 //#include "fs-util.h"
16 //#include "parse-util.h"
17 //#include "process-util.h"
19 #include "signal-util.h"
20 //#include "stdio-util.h"
21 //#include "string-util.h"
23 /// Additional includes needed by elogind
24 #include "process-util.h"
26 static int prepare_handler(sd_event_source *s, void *userdata) {
27 log_info("preparing %c", PTR_TO_INT(userdata));
31 static bool got_a, got_b, got_c, got_unref;
32 static unsigned got_d;
34 static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
35 sd_event_source_unref(s);
40 static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
42 log_info("got IO on %c", PTR_TO_INT(userdata));
44 if (userdata == INT_TO_PTR('a')) {
45 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
48 } else if (userdata == INT_TO_PTR('b')) {
51 } else if (userdata == INT_TO_PTR('d')) {
54 assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
56 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
58 assert_not_reached("Yuck!");
63 static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
68 log_info("got child on %c", PTR_TO_INT(userdata));
70 assert_se(userdata == INT_TO_PTR('f'));
72 assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
73 sd_event_source_unref(s);
78 static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
79 sd_event_source *p = NULL;
85 log_info("got signal on %c", PTR_TO_INT(userdata));
87 assert_se(userdata == INT_TO_PTR('e'));
89 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
97 assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
98 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
100 sd_event_source_unref(s);
105 static int defer_handler(sd_event_source *s, void *userdata) {
106 sd_event_source *p = NULL;
110 log_info("got defer on %c", PTR_TO_INT(userdata));
112 assert_se(userdata == INT_TO_PTR('d'));
114 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);
116 assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
117 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
120 sd_event_source_unref(s);
125 static bool do_quit = false;
127 static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
128 log_info("got timer on %c", PTR_TO_INT(userdata));
130 if (userdata == INT_TO_PTR('c')) {
135 assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
136 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
142 assert_not_reached("Huh?");
147 static bool got_exit = false;
149 static int exit_handler(sd_event_source *s, void *userdata) {
150 log_info("got quit handler on %c", PTR_TO_INT(userdata));
157 static bool got_post = false;
159 static int post_handler(sd_event_source *s, void *userdata) {
160 log_info("got post handler");
167 static void test_basic(void) {
169 sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
170 static const char ch = 'x';
171 int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
175 assert_se(pipe(a) >= 0);
176 assert_se(pipe(b) >= 0);
177 assert_se(pipe(d) >= 0);
178 assert_se(pipe(k) >= 0);
180 assert_se(sd_event_default(&e) >= 0);
181 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
183 assert_se(sd_event_set_watchdog(e, true) >= 0);
185 /* Test whether we cleanly can destroy an io event source from its own handler */
187 assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
188 assert_se(write(k[1], &ch, 1) == 1);
189 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
190 assert_se(got_unref);
192 got_a = false, got_b = false, got_c = false, got_d = 0;
194 /* Add a oneshot handler, trigger it, re-enable it, and trigger
196 assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
197 assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
198 assert_se(write(d[1], &ch, 1) >= 0);
199 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
200 assert_se(got_d == 1);
201 assert_se(write(d[1], &ch, 1) >= 0);
202 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
203 assert_se(got_d == 2);
205 assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
206 assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
207 assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
208 assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);
210 assert_se(sd_event_source_set_priority(x, 99) >= 0);
211 assert_se(sd_event_source_get_priority(x, &priority) >= 0);
212 assert_se(priority == 99);
213 assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
214 assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
215 assert_se(sd_event_source_set_priority(z, 50) >= 0);
216 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
217 assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
219 /* Test for floating event sources */
220 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
221 assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);
223 assert_se(write(a[1], &ch, 1) >= 0);
224 assert_se(write(b[1], &ch, 1) >= 0);
226 assert_se(!got_a && !got_b && !got_c);
228 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
230 assert_se(!got_a && got_b && !got_c);
232 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
234 assert_se(!got_a && got_b && got_c);
236 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
238 assert_se(got_a && got_b && got_c);
240 sd_event_source_unref(x);
241 sd_event_source_unref(y);
244 assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
245 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
246 assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
247 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
249 assert_se(sd_event_loop(e) >= 0);
253 sd_event_source_unref(z);
254 sd_event_source_unref(q);
256 sd_event_source_unref(w);
266 static void test_sd_event_now(void) {
267 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
270 assert_se(sd_event_new(&e) >= 0);
271 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
272 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
273 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
274 if (clock_boottime_supported()) {
275 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
276 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
278 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
279 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
281 assert_se(sd_event_run(e, 0) == 0);
283 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
284 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
285 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
286 if (clock_boottime_supported()) {
287 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
288 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
290 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
291 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
294 static int last_rtqueue_sigval = 0;
295 static int n_rtqueue = 0;
297 static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
298 last_rtqueue_sigval = si->ssi_int;
303 static void test_rtqueue(void) {
304 sd_event_source *u = NULL, *v = NULL, *s = NULL;
307 assert_se(sd_event_default(&e) >= 0);
309 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
310 assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
311 assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
312 assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);
314 assert_se(sd_event_source_set_priority(v, -10) >= 0);
316 assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
317 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
318 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
319 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
320 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);
322 assert_se(n_rtqueue == 0);
323 assert_se(last_rtqueue_sigval == 0);
325 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
326 assert_se(n_rtqueue == 1);
327 assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */
329 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
330 assert_se(n_rtqueue == 2);
331 assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */
333 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
334 assert_se(n_rtqueue == 3);
335 assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */
337 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
338 assert_se(n_rtqueue == 4);
339 assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */
341 assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
342 assert_se(n_rtqueue == 4);
343 assert_se(last_rtqueue_sigval == 1);
345 sd_event_source_unref(u);
346 sd_event_source_unref(v);
347 sd_event_source_unref(s);
352 #define CREATE_EVENTS_MAX (70000U)
354 struct inotify_context {
355 bool delete_self_handler_called;
356 unsigned create_called[CREATE_EVENTS_MAX];
357 unsigned create_overflow;
358 unsigned n_create_events;
361 static void maybe_exit(sd_event_source *s, struct inotify_context *c) {
367 if (!c->delete_self_handler_called)
370 for (n = 0; n < 3; n++) {
373 if (c->create_overflow & (1U << n))
376 for (i = 0; i < c->n_create_events; i++)
377 if (!(c->create_called[i] & (1U << n)))
381 sd_event_exit(sd_event_source_get_event(s), 0);
384 static int inotify_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
385 struct inotify_context *c = userdata;
386 const char *description;
389 assert_se(sd_event_source_get_description(s, &description) >= 0);
390 assert_se(safe_atou(description, &n) >= 0);
395 if (ev->mask & IN_Q_OVERFLOW) {
396 log_info("inotify-handler <%s>: overflow", description);
397 c->create_overflow |= bit;
398 } else if (ev->mask & IN_CREATE) {
401 log_info("inotify-handler <%s>: create on %s", description, ev->name);
403 if (!streq(ev->name, "sub")) {
404 assert_se(safe_atou(ev->name, &i) >= 0);
406 assert_se(i < c->n_create_events);
407 c->create_called[i] |= bit;
409 } else if (ev->mask & IN_DELETE) {
410 log_info("inotify-handler <%s>: delete of %s", description, ev->name);
411 assert_se(streq(ev->name, "sub"));
413 assert_not_reached("unexpected inotify event");
419 static int delete_self_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
420 struct inotify_context *c = userdata;
422 if (ev->mask & IN_Q_OVERFLOW) {
423 log_info("delete-self-handler: overflow");
424 c->delete_self_handler_called = true;
425 } else if (ev->mask & IN_DELETE_SELF) {
426 log_info("delete-self-handler: delete-self");
427 c->delete_self_handler_called = true;
428 } else if (ev->mask & IN_IGNORED) {
429 log_info("delete-self-handler: ignore");
431 assert_not_reached("unexpected inotify event (delete-self)");
437 static void test_inotify(unsigned n_create_events) {
438 _cleanup_(rm_rf_physical_and_freep) char *p = NULL;
439 sd_event_source *a = NULL, *b = NULL, *c = NULL, *d = NULL;
440 struct inotify_context context = {
441 .n_create_events = n_create_events,
447 assert_se(sd_event_default(&e) >= 0);
449 assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0);
451 assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE|IN_ONLYDIR, inotify_handler, &context) >= 0);
452 assert_se(sd_event_add_inotify(e, &b, p, IN_CREATE|IN_DELETE|IN_DONT_FOLLOW, inotify_handler, &context) >= 0);
453 assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE) >= 0);
454 assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL) >= 0);
455 assert_se(sd_event_add_inotify(e, &c, p, IN_CREATE|IN_DELETE|IN_EXCL_UNLINK, inotify_handler, &context) >= 0);
456 assert_se(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE) >= 0);
458 assert_se(sd_event_source_set_description(a, "0") >= 0);
459 assert_se(sd_event_source_set_description(b, "1") >= 0);
460 assert_se(sd_event_source_set_description(c, "2") >= 0);
462 q = strjoina(p, "/sub");
463 assert_se(touch(q) >= 0);
464 assert_se(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context) >= 0);
466 for (i = 0; i < n_create_events; i++) {
467 char buf[DECIMAL_STR_MAX(unsigned)+1];
468 _cleanup_free_ char *z;
470 xsprintf(buf, "%u", i);
471 assert_se(z = strjoin(p, "/", buf));
473 assert_se(touch(z) >= 0);
476 assert_se(unlink(q) >= 0);
478 assert_se(sd_event_loop(e) >= 0);
480 sd_event_source_unref(a);
481 sd_event_source_unref(b);
482 sd_event_source_unref(c);
483 sd_event_source_unref(d);
488 int main(int argc, char *argv[]) {
490 log_set_max_level(LOG_DEBUG);
491 log_parse_environment();
497 test_inotify(100); /* should work without overflow */
498 test_inotify(33000); /* should trigger a q overflow */