1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2013 Lennart Poettering
15 #include "signal-util.h"
17 /// Additional includes needed by elogind
18 #include "process-util.h"
20 static int prepare_handler(sd_event_source *s, void *userdata) {
21 log_info("preparing %c", PTR_TO_INT(userdata));
25 static bool got_a, got_b, got_c, got_unref;
26 static unsigned got_d;
28 static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
29 sd_event_source_unref(s);
34 static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
36 log_info("got IO on %c", PTR_TO_INT(userdata));
38 if (userdata == INT_TO_PTR('a')) {
39 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
42 } else if (userdata == INT_TO_PTR('b')) {
45 } else if (userdata == INT_TO_PTR('d')) {
48 assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
50 assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
52 assert_not_reached("Yuck!");
57 static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
62 log_info("got child on %c", PTR_TO_INT(userdata));
64 assert_se(userdata == INT_TO_PTR('f'));
66 assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
67 sd_event_source_unref(s);
72 static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
73 sd_event_source *p = NULL;
79 log_info("got signal on %c", PTR_TO_INT(userdata));
81 assert_se(userdata == INT_TO_PTR('e'));
83 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
91 assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
92 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
94 sd_event_source_unref(s);
99 static int defer_handler(sd_event_source *s, void *userdata) {
100 sd_event_source *p = NULL;
104 log_info("got defer on %c", PTR_TO_INT(userdata));
106 assert_se(userdata == INT_TO_PTR('d'));
108 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);
110 assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
111 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
114 sd_event_source_unref(s);
119 static bool do_quit = false;
121 static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
122 log_info("got timer on %c", PTR_TO_INT(userdata));
124 if (userdata == INT_TO_PTR('c')) {
129 assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
130 assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
136 assert_not_reached("Huh?");
141 static bool got_exit = false;
143 static int exit_handler(sd_event_source *s, void *userdata) {
144 log_info("got quit handler on %c", PTR_TO_INT(userdata));
151 static bool got_post = false;
153 static int post_handler(sd_event_source *s, void *userdata) {
154 log_info("got post handler");
161 static void test_basic(void) {
163 sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
164 static const char ch = 'x';
165 int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
169 assert_se(pipe(a) >= 0);
170 assert_se(pipe(b) >= 0);
171 assert_se(pipe(d) >= 0);
172 assert_se(pipe(k) >= 0);
174 assert_se(sd_event_default(&e) >= 0);
175 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
177 assert_se(sd_event_set_watchdog(e, true) >= 0);
179 /* Test whether we cleanly can destroy an io event source from its own handler */
181 assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
182 assert_se(write(k[1], &ch, 1) == 1);
183 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
184 assert_se(got_unref);
186 got_a = false, got_b = false, got_c = false, got_d = 0;
188 /* Add a oneshot handler, trigger it, re-enable it, and trigger
190 assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
191 assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
192 assert_se(write(d[1], &ch, 1) >= 0);
193 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
194 assert_se(got_d == 1);
195 assert_se(write(d[1], &ch, 1) >= 0);
196 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
197 assert_se(got_d == 2);
199 assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
200 assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
201 assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
202 assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);
204 assert_se(sd_event_source_set_priority(x, 99) >= 0);
205 assert_se(sd_event_source_get_priority(x, &priority) >= 0);
206 assert_se(priority == 99);
207 assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
208 assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
209 assert_se(sd_event_source_set_priority(z, 50) >= 0);
210 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
211 assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
213 /* Test for floating event sources */
214 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
215 assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);
217 assert_se(write(a[1], &ch, 1) >= 0);
218 assert_se(write(b[1], &ch, 1) >= 0);
220 assert_se(!got_a && !got_b && !got_c);
222 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
224 assert_se(!got_a && got_b && !got_c);
226 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
228 assert_se(!got_a && got_b && got_c);
230 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
232 assert_se(got_a && got_b && got_c);
234 sd_event_source_unref(x);
235 sd_event_source_unref(y);
238 assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
239 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
240 assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
241 assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
243 assert_se(sd_event_loop(e) >= 0);
247 sd_event_source_unref(z);
248 sd_event_source_unref(q);
250 sd_event_source_unref(w);
260 static void test_sd_event_now(void) {
261 _cleanup_(sd_event_unrefp) sd_event *e = NULL;
264 assert_se(sd_event_new(&e) >= 0);
265 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
266 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
267 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
268 if (clock_boottime_supported()) {
269 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
270 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
272 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
273 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
275 assert_se(sd_event_run(e, 0) == 0);
277 assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
278 assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
279 assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
280 if (clock_boottime_supported()) {
281 assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
282 assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
284 assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
285 assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
288 static int last_rtqueue_sigval = 0;
289 static int n_rtqueue = 0;
291 static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
292 last_rtqueue_sigval = si->ssi_int;
297 static void test_rtqueue(void) {
298 sd_event_source *u = NULL, *v = NULL, *s = NULL;
301 assert_se(sd_event_default(&e) >= 0);
303 assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
304 assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
305 assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
306 assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);
308 assert_se(sd_event_source_set_priority(v, -10) >= 0);
310 assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
311 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
312 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
313 assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
314 assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);
316 assert_se(n_rtqueue == 0);
317 assert_se(last_rtqueue_sigval == 0);
319 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
320 assert_se(n_rtqueue == 1);
321 assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */
323 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
324 assert_se(n_rtqueue == 2);
325 assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */
327 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
328 assert_se(n_rtqueue == 3);
329 assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */
331 assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
332 assert_se(n_rtqueue == 4);
333 assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */
335 assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
336 assert_se(n_rtqueue == 4);
337 assert_se(last_rtqueue_sigval == 1);
339 sd_event_source_unref(u);
340 sd_event_source_unref(v);
341 sd_event_source_unref(s);
346 int main(int argc, char *argv[]) {
348 log_set_max_level(LOG_DEBUG);
349 log_parse_environment();