1 /* SPDX-License-Identifier: LGPL-2.1+ */
9 //#include "alloc-util.h"
12 //#include "fs-util.h"
15 //#include "parse-util.h"
16 //#include "process-util.h"
18 #include "signal-util.h"
19 //#include "stdio-util.h"
20 //#include "string-util.h"
22 /// Additional includes needed by elogind
23 #include "process-util.h"
25 static int prepare_handler(sd_event_source *s, void *userdata) {
26 log_info("preparing %c", PTR_TO_INT(userdata));
30 static bool got_a, got_b, got_c, got_unref;
31 static unsigned got_d;
33 static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
34 sd_event_source_unref(s);
39 static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
41 log_info("got IO on %c", PTR_TO_INT(userdata));
43 if (userdata == INT_TO_PTR('a')) {
44 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
47 } else if (userdata == INT_TO_PTR('b')) {
50 } else if (userdata == INT_TO_PTR('d')) {
53 assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
55 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
57 assert_not_reached("Yuck!");
62 static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
67 log_info("got child on %c", PTR_TO_INT(userdata));
69 assert_se(userdata == INT_TO_PTR('f'));
71 assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
72 sd_event_source_unref(s);
77 static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
78 sd_event_source *p = NULL;
84 log_info("got signal on %c", PTR_TO_INT(userdata));
86 assert_se(userdata == INT_TO_PTR('e'));
88 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
96 assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
97 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
99 sd_event_source_unref(s);
104 static int defer_handler(sd_event_source *s, void *userdata) {
105 sd_event_source *p = NULL;
109 log_info("got defer on %c", PTR_TO_INT(userdata));
111 assert_se(userdata == INT_TO_PTR('d'));
113 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);
115 assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
116 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
119 sd_event_source_unref(s);
124 static bool do_quit = false;
126 static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
127 log_info("got timer on %c", PTR_TO_INT(userdata));
129 if (userdata == INT_TO_PTR('c')) {
134 assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
135 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
141 assert_not_reached("Huh?");
146 static bool got_exit = false;
148 static int exit_handler(sd_event_source *s, void *userdata) {
149 log_info("got quit handler on %c", PTR_TO_INT(userdata));
156 static bool got_post = false;
158 static int post_handler(sd_event_source *s, void *userdata) {
159 log_info("got post handler");
166 static void test_basic(void) {
168 sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
169 static const char ch = 'x';
170 int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
174 assert_se(pipe(a) >= 0);
175 assert_se(pipe(b) >= 0);
176 assert_se(pipe(d) >= 0);
177 assert_se(pipe(k) >= 0);
179 assert_se(sd_event_default(&e) >= 0);
180 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
182 assert_se(sd_event_set_watchdog(e, true) >= 0);
184 /* Test whether we cleanly can destroy an io event source from its own handler */
186 assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
187 assert_se(write(k[1], &ch, 1) == 1);
188 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
189 assert_se(got_unref);
191 got_a = false, got_b = false, got_c = false, got_d = 0;
193 /* Add a oneshot handler, trigger it, re-enable it, and trigger
195 assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
196 assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
197 assert_se(write(d[1], &ch, 1) >= 0);
198 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
199 assert_se(got_d == 1);
200 assert_se(write(d[1], &ch, 1) >= 0);
201 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
202 assert_se(got_d == 2);
204 assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
205 assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
206 assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
207 assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);
209 assert_se(sd_event_source_set_priority(x, 99) >= 0);
210 assert_se(sd_event_source_get_priority(x, &priority) >= 0);
211 assert_se(priority == 99);
212 assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
213 assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
214 assert_se(sd_event_source_set_priority(z, 50) >= 0);
215 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
216 assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
218 /* Test for floating event sources */
219 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
220 assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);
222 assert_se(write(a[1], &ch, 1) >= 0);
223 assert_se(write(b[1], &ch, 1) >= 0);
225 assert_se(!got_a && !got_b && !got_c);
227 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
229 assert_se(!got_a && got_b && !got_c);
231 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
233 assert_se(!got_a && got_b && got_c);
235 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
237 assert_se(got_a && got_b && got_c);
239 sd_event_source_unref(x);
240 sd_event_source_unref(y);
243 assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
244 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
245 assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
246 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
248 assert_se(sd_event_loop(e) >= 0);
252 sd_event_source_unref(z);
253 sd_event_source_unref(q);
255 sd_event_source_unref(w);
265 static void test_sd_event_now(void) {
266 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
269 assert_se(sd_event_new(&e) >= 0);
270 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
271 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
272 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
273 if (clock_boottime_supported()) {
274 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
275 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
277 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
278 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
280 assert_se(sd_event_run(e, 0) == 0);
282 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
283 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
284 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
285 if (clock_boottime_supported()) {
286 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
287 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
289 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
290 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
293 static int last_rtqueue_sigval = 0;
294 static int n_rtqueue = 0;
296 static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
297 last_rtqueue_sigval = si->ssi_int;
302 static void test_rtqueue(void) {
303 sd_event_source *u = NULL, *v = NULL, *s = NULL;
306 assert_se(sd_event_default(&e) >= 0);
308 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
309 assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
310 assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
311 assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);
313 assert_se(sd_event_source_set_priority(v, -10) >= 0);
315 assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
316 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
317 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
318 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
319 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);
321 assert_se(n_rtqueue == 0);
322 assert_se(last_rtqueue_sigval == 0);
324 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
325 assert_se(n_rtqueue == 1);
326 assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */
328 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
329 assert_se(n_rtqueue == 2);
330 assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */
332 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
333 assert_se(n_rtqueue == 3);
334 assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */
336 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
337 assert_se(n_rtqueue == 4);
338 assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */
340 assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
341 assert_se(n_rtqueue == 4);
342 assert_se(last_rtqueue_sigval == 1);
344 sd_event_source_unref(u);
345 sd_event_source_unref(v);
346 sd_event_source_unref(s);
351 #define CREATE_EVENTS_MAX (70000U)
353 struct inotify_context {
354 bool delete_self_handler_called;
355 unsigned create_called[CREATE_EVENTS_MAX];
356 unsigned create_overflow;
357 unsigned n_create_events;
360 static void maybe_exit(sd_event_source *s, struct inotify_context *c) {
366 if (!c->delete_self_handler_called)
369 for (n = 0; n < 3; n++) {
372 if (c->create_overflow & (1U << n))
375 for (i = 0; i < c->n_create_events; i++)
376 if (!(c->create_called[i] & (1U << n)))
380 sd_event_exit(sd_event_source_get_event(s), 0);
383 static int inotify_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
384 struct inotify_context *c = userdata;
385 const char *description;
388 assert_se(sd_event_source_get_description(s, &description) >= 0);
389 assert_se(safe_atou(description, &n) >= 0);
394 if (ev->mask & IN_Q_OVERFLOW) {
395 log_info("inotify-handler <%s>: overflow", description);
396 c->create_overflow |= bit;
397 } else if (ev->mask & IN_CREATE) {
400 log_info("inotify-handler <%s>: create on %s", description, ev->name);
402 if (!streq(ev->name, "sub")) {
403 assert_se(safe_atou(ev->name, &i) >= 0);
405 assert_se(i < c->n_create_events);
406 c->create_called[i] |= bit;
408 } else if (ev->mask & IN_DELETE) {
409 log_info("inotify-handler <%s>: delete of %s", description, ev->name);
410 assert_se(streq(ev->name, "sub"));
412 assert_not_reached("unexpected inotify event");
418 static int delete_self_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
419 struct inotify_context *c = userdata;
421 if (ev->mask & IN_Q_OVERFLOW) {
422 log_info("delete-self-handler: overflow");
423 c->delete_self_handler_called = true;
424 } else if (ev->mask & IN_DELETE_SELF) {
425 log_info("delete-self-handler: delete-self");
426 c->delete_self_handler_called = true;
427 } else if (ev->mask & IN_IGNORED) {
428 log_info("delete-self-handler: ignore");
430 assert_not_reached("unexpected inotify event (delete-self)");
436 static void test_inotify(unsigned n_create_events) {
437 _cleanup_(rm_rf_physical_and_freep) char *p = NULL;
438 sd_event_source *a = NULL, *b = NULL, *c = NULL, *d = NULL;
439 struct inotify_context context = {
440 .n_create_events = n_create_events,
446 assert_se(sd_event_default(&e) >= 0);
448 assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0);
450 assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE|IN_ONLYDIR, inotify_handler, &context) >= 0);
451 assert_se(sd_event_add_inotify(e, &b, p, IN_CREATE|IN_DELETE|IN_DONT_FOLLOW, inotify_handler, &context) >= 0);
452 assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE) >= 0);
453 assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL) >= 0);
454 assert_se(sd_event_add_inotify(e, &c, p, IN_CREATE|IN_DELETE|IN_EXCL_UNLINK, inotify_handler, &context) >= 0);
455 assert_se(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE) >= 0);
457 assert_se(sd_event_source_set_description(a, "0") >= 0);
458 assert_se(sd_event_source_set_description(b, "1") >= 0);
459 assert_se(sd_event_source_set_description(c, "2") >= 0);
461 q = strjoina(p, "/sub");
462 assert_se(touch(q) >= 0);
463 assert_se(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context) >= 0);
465 for (i = 0; i < n_create_events; i++) {
466 char buf[DECIMAL_STR_MAX(unsigned)+1];
467 _cleanup_free_ char *z;
469 xsprintf(buf, "%u", i);
470 assert_se(z = strjoin(p, "/", buf));
472 assert_se(touch(z) >= 0);
475 assert_se(unlink(q) >= 0);
477 assert_se(sd_event_loop(e) >= 0);
479 sd_event_source_unref(a);
480 sd_event_source_unref(b);
481 sd_event_source_unref(c);
482 sd_event_source_unref(d);
487 int main(int argc, char *argv[]) {
489 log_set_max_level(LOG_DEBUG);
490 log_parse_environment();
496 test_inotify(100); /* should work without overflow */
497 test_inotify(33000); /* should trigger a q overflow */