[thirdparty/systemd.git] / src / libsystemd / sd-event / test-event.c

/* SPDX-License-Identifier: LGPL-2.1+ */
/***
***/

#include <sys/wait.h>

#include "sd-event.h"

#include "alloc-util.h"
#include "fd-util.h"
#include "fileio.h"
#include "fs-util.h"
#include "log.h"
#include "macro.h"
#include "parse-util.h"
#include "process-util.h"
#include "rm-rf.h"
#include "signal-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "util.h"

static int prepare_handler(sd_event_source *s, void *userdata) {
        log_info("preparing %c", PTR_TO_INT(userdata));
        return 1;
}

static bool got_a, got_b, got_c, got_unref;
static unsigned got_d;

static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
        sd_event_source_unref(s);
        got_unref = true;
        return 0;
}

static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {

        log_info("got IO on %c", PTR_TO_INT(userdata));

        if (userdata == INT_TO_PTR('a')) {
                assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
                assert_se(!got_a);
                got_a = true;
        } else if (userdata == INT_TO_PTR('b')) {
                assert_se(!got_b);
                got_b = true;
        } else if (userdata == INT_TO_PTR('d')) {
                got_d++;
                if (got_d < 2)
                        assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
                else
                        assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
        } else
                assert_not_reached("Yuck!");

        return 1;
}

static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {

        assert_se(s);
        assert_se(si);

        log_info("got child on %c", PTR_TO_INT(userdata));

        assert_se(userdata == INT_TO_PTR('f'));

        assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
        sd_event_source_unref(s);

        return 1;
}

static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
        sd_event_source *p = NULL;
        pid_t pid;

        assert_se(s);
        assert_se(si);

        log_info("got signal on %c", PTR_TO_INT(userdata));

        assert_se(userdata == INT_TO_PTR('e'));

        assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);

        pid = fork();
        assert_se(pid >= 0);

        if (pid == 0)
                _exit(EXIT_SUCCESS);

        assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
        assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);

        sd_event_source_unref(s);

        return 1;
}

static int defer_handler(sd_event_source *s, void *userdata) {
        sd_event_source *p = NULL;

        assert_se(s);

        log_info("got defer on %c", PTR_TO_INT(userdata));

        assert_se(userdata == INT_TO_PTR('d'));

        assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);

        assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
        assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
        raise(SIGUSR1);

        sd_event_source_unref(s);

        return 1;
}

static bool do_quit = false;

static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
        log_info("got timer on %c", PTR_TO_INT(userdata));

        if (userdata == INT_TO_PTR('c')) {

                if (do_quit) {
                        sd_event_source *p;

                        assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
                        assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
                } else {
                        assert_se(!got_c);
                        got_c = true;
                }
        } else
                assert_not_reached("Huh?");

        return 2;
}

static bool got_exit = false;

static int exit_handler(sd_event_source *s, void *userdata) {
        log_info("got quit handler on %c", PTR_TO_INT(userdata));

        got_exit = true;

        return 3;
}

static bool got_post = false;

static int post_handler(sd_event_source *s, void *userdata) {
        log_info("got post handler");

        got_post = true;

        return 2;
}

static void test_basic(void) {
        sd_event *e = NULL;
        sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
        static const char ch = 'x';
        int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
        uint64_t event_now;
        int64_t priority;

        assert_se(pipe(a) >= 0);
        assert_se(pipe(b) >= 0);
        assert_se(pipe(d) >= 0);
        assert_se(pipe(k) >= 0);

        assert_se(sd_event_default(&e) >= 0);
        assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);

        assert_se(sd_event_set_watchdog(e, true) >= 0);

        /* Test whether we cleanly can destroy an io event source from its own handler */
        got_unref = false;
        assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
        assert_se(write(k[1], &ch, 1) == 1);
        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
        assert_se(got_unref);

        got_a = false, got_b = false, got_c = false, got_d = 0;

        /* Add a oneshot handler, trigger it, re-enable it, and trigger
         * it again. */
        assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
        assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
        assert_se(write(d[1], &ch, 1) >= 0);
        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
        assert_se(got_d == 1);
        assert_se(write(d[1], &ch, 1) >= 0);
        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
        assert_se(got_d == 2);

        assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
        assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
        assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
        assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);

        assert_se(sd_event_source_set_priority(x, 99) >= 0);
        assert_se(sd_event_source_get_priority(x, &priority) >= 0);
        assert_se(priority == 99);
        assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
        assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
        assert_se(sd_event_source_set_priority(z, 50) >= 0);
        assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
        assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);

        /* Test for floating event sources */
        assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
        assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);

        assert_se(write(a[1], &ch, 1) >= 0);
        assert_se(write(b[1], &ch, 1) >= 0);

        assert_se(!got_a && !got_b && !got_c);

        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

        assert_se(!got_a && got_b && !got_c);

        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

        assert_se(!got_a && got_b && got_c);

        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);

        assert_se(got_a && got_b && got_c);

        sd_event_source_unref(x);
        sd_event_source_unref(y);

        do_quit = true;
        assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
        assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
        assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
        assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);

        assert_se(sd_event_loop(e) >= 0);
        assert_se(got_post);
        assert_se(got_exit);

        sd_event_source_unref(z);
        sd_event_source_unref(q);

        sd_event_source_unref(w);

        sd_event_unref(e);

        safe_close_pair(a);
        safe_close_pair(b);
        safe_close_pair(d);
        safe_close_pair(k);
}

static void test_sd_event_now(void) {
        _cleanup_(sd_event_unrefp) sd_event *e = NULL;
        uint64_t event_now;

        assert_se(sd_event_new(&e) >= 0);
        assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
        assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
        assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
        if (clock_boottime_supported()) {
                assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
                assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
        }
        assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
        assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);

        assert_se(sd_event_run(e, 0) == 0);

        assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
        assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
        assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
        if (clock_boottime_supported()) {
                assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
                assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
        }
        assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
        assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
}

static int last_rtqueue_sigval = 0;
static int n_rtqueue = 0;

static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
        last_rtqueue_sigval = si->ssi_int;
        n_rtqueue++;
        return 0;
}

static void test_rtqueue(void) {
        sd_event_source *u = NULL, *v = NULL, *s = NULL;
        sd_event *e = NULL;

        assert_se(sd_event_default(&e) >= 0);

        assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
        assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
        assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
        assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);

        assert_se(sd_event_source_set_priority(v, -10) >= 0);

        assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
        assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
        assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
        assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
        assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);

        assert_se(n_rtqueue == 0);
        assert_se(last_rtqueue_sigval == 0);

        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
        assert_se(n_rtqueue == 1);
        assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */

        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
        assert_se(n_rtqueue == 2);
        assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */

        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
        assert_se(n_rtqueue == 3);
        assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */

        assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
        assert_se(n_rtqueue == 4);
        assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */

        assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
        assert_se(n_rtqueue == 4);
        assert_se(last_rtqueue_sigval == 1);

        sd_event_source_unref(u);
        sd_event_source_unref(v);
        sd_event_source_unref(s);

        sd_event_unref(e);
}

#define CREATE_EVENTS_MAX (70000U)

struct inotify_context {
        bool delete_self_handler_called;
        unsigned create_called[CREATE_EVENTS_MAX];
        unsigned create_overflow;
        unsigned n_create_events;
};

static void maybe_exit(sd_event_source *s, struct inotify_context *c) {
        unsigned n;

        assert(s);
        assert(c);

        if (!c->delete_self_handler_called)
                return;

        for (n = 0; n < 3; n++) {
                unsigned i;

                if (c->create_overflow & (1U << n))
                        continue;

                for (i = 0; i < c->n_create_events; i++)
                        if (!(c->create_called[i] & (1U << n)))
                                return;
        }

        sd_event_exit(sd_event_source_get_event(s), 0);
}

static int inotify_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
        struct inotify_context *c = userdata;
        const char *description;
        unsigned bit, n;

        assert_se(sd_event_source_get_description(s, &description) >= 0);
        assert_se(safe_atou(description, &n) >= 0);

        assert_se(n <= 3);
        bit = 1U << n;

        if (ev->mask & IN_Q_OVERFLOW) {
                log_info("inotify-handler <%s>: overflow", description);
                c->create_overflow |= bit;
        } else if (ev->mask & IN_CREATE) {
                unsigned i;

                log_info("inotify-handler <%s>: create on %s", description, ev->name);

                if (!streq(ev->name, "sub")) {
                        assert_se(safe_atou(ev->name, &i) >= 0);

                        assert_se(i < c->n_create_events);
                        c->create_called[i] |= bit;
                }
        } else if (ev->mask & IN_DELETE) {
                log_info("inotify-handler <%s>: delete of %s", description, ev->name);
                assert_se(streq(ev->name, "sub"));
        } else
                assert_not_reached("unexpected inotify event");

        maybe_exit(s, c);
        return 1;
}

static int delete_self_handler(sd_event_source *s, const struct inotify_event *ev, void *userdata) {
        struct inotify_context *c = userdata;

        if (ev->mask & IN_Q_OVERFLOW) {
                log_info("delete-self-handler: overflow");
                c->delete_self_handler_called = true;
        } else if (ev->mask & IN_DELETE_SELF) {
                log_info("delete-self-handler: delete-self");
                c->delete_self_handler_called = true;
        } else if (ev->mask & IN_IGNORED) {
                log_info("delete-self-handler: ignore");
        } else
                assert_not_reached("unexpected inotify event (delete-self)");

        maybe_exit(s, c);
        return 1;
}

static void test_inotify(unsigned n_create_events) {
        _cleanup_(rm_rf_physical_and_freep) char *p = NULL;
        sd_event_source *a = NULL, *b = NULL, *c = NULL, *d = NULL;
        struct inotify_context context = {
                .n_create_events = n_create_events,
        };
        sd_event *e = NULL;
        const char *q;
        unsigned i;

        assert_se(sd_event_default(&e) >= 0);

        assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0);

        assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE|IN_ONLYDIR, inotify_handler, &context) >= 0);
        assert_se(sd_event_add_inotify(e, &b, p, IN_CREATE|IN_DELETE|IN_DONT_FOLLOW, inotify_handler, &context) >= 0);
        assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE) >= 0);
        assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL) >= 0);
        assert_se(sd_event_add_inotify(e, &c, p, IN_CREATE|IN_DELETE|IN_EXCL_UNLINK, inotify_handler, &context) >= 0);
        assert_se(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE) >= 0);

        assert_se(sd_event_source_set_description(a, "0") >= 0);
        assert_se(sd_event_source_set_description(b, "1") >= 0);
        assert_se(sd_event_source_set_description(c, "2") >= 0);

        q = strjoina(p, "/sub");
        assert_se(touch(q) >= 0);
        assert_se(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context) >= 0);

        for (i = 0; i < n_create_events; i++) {
                char buf[DECIMAL_STR_MAX(unsigned)+1];
                _cleanup_free_ char *z;

                xsprintf(buf, "%u", i);
                assert_se(z = strjoin(p, "/", buf));

                assert_se(touch(z) >= 0);
        }

        assert_se(unlink(q) >= 0);

        assert_se(sd_event_loop(e) >= 0);

        sd_event_source_unref(a);
        sd_event_source_unref(b);
        sd_event_source_unref(c);
        sd_event_source_unref(d);

        sd_event_unref(e);
}

int main(int argc, char *argv[]) {

        log_set_max_level(LOG_DEBUG);
        log_parse_environment();

        test_basic();
        test_sd_event_now();
        test_rtqueue();

        test_inotify(100); /* should work without overflow */
        test_inotify(33000); /* should trigger a q overflow */

        return 0;
}
Commit	Line	Data
53e1b683	1	/* SPDX-License-Identifier: LGPL-2.1+ */
fd38203a	2	/***
fd38203a LP	3	***/
fd38203a LP	4
fe993888 MS	5	#include <sys/wait.h>
fe993888 MS	6
fd38203a	7	#include "sd-event.h"
3ffd4af2	8
41e09d62	9	#include "alloc-util.h"
3ffd4af2	10	#include "fd-util.h"
41e09d62 LP	11	#include "fileio.h"
41e09d62 LP	12	#include "fs-util.h"
fd38203a	13	#include "log.h"
0c0cdb06	14	#include "macro.h"
41e09d62 LP	15	#include "parse-util.h"
	16	#include "process-util.h"
	17	#include "rm-rf.h"
24882e06	18	#include "signal-util.h"
41e09d62 LP	19	#include "stdio-util.h"
41e09d62 LP	20	#include "string-util.h"
3ffd4af2	21	#include "util.h"
fd38203a LP	22
	23	static int prepare_handler(sd_event_source s, void userdata) {
	24	log_info("preparing %c", PTR_TO_INT(userdata));
	25	return 1;
	26	}
	27
12179984	28	static bool got_a, got_b, got_c, got_unref;
9ec9694c	29	static unsigned got_d;
fd38203a	30
12179984 LP	31	static int unref_handler(sd_event_source s, int fd, uint32_t revents, void userdata) {
	32	sd_event_source_unref(s);
	33	got_unref = true;
	34	return 0;
	35	}
	36
fd38203a LP	37	static int io_handler(sd_event_source s, int fd, uint32_t revents, void userdata) {
	38
	39	log_info("got IO on %c", PTR_TO_INT(userdata));
	40
	41	if (userdata == INT_TO_PTR('a')) {
baf76283	42	assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
fd38203a LP	43	assert_se(!got_a);
	44	got_a = true;
	45	} else if (userdata == INT_TO_PTR('b')) {
	46	assert_se(!got_b);
	47	got_b = true;
9ec9694c DS	48	} else if (userdata == INT_TO_PTR('d')) {
	49	got_d++;
	50	if (got_d < 2)
	51	assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
	52	else
	53	assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
fd38203a LP	54	} else
	55	assert_not_reached("Yuck!");
	56
	57	return 1;
	58	}
	59
	60	static int child_handler(sd_event_source s, const siginfo_t si, void *userdata) {
	61
0c0cdb06 RC	62	assert_se(s);
0c0cdb06 RC	63	assert_se(si);
fd38203a LP	64
	65	log_info("got child on %c", PTR_TO_INT(userdata));
	66
0c0cdb06	67	assert_se(userdata == INT_TO_PTR('f'));
fd38203a	68
6203e07a	69	assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
fd38203a LP	70	sd_event_source_unref(s);
	71
	72	return 1;
	73	}
	74
	75	static int signal_handler(sd_event_source s, const struct signalfd_siginfo si, void *userdata) {
39883f62	76	sd_event_source *p = NULL;
fd38203a LP	77	pid_t pid;
fd38203a LP	78
0c0cdb06 RC	79	assert_se(s);
0c0cdb06 RC	80	assert_se(si);
fd38203a LP	81
	82	log_info("got signal on %c", PTR_TO_INT(userdata));
	83
0c0cdb06	84	assert_se(userdata == INT_TO_PTR('e'));
fd38203a	85
72c0a2c2	86	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
fd38203a LP	87
	88	pid = fork();
	89	assert_se(pid >= 0);
	90
	91	if (pid == 0)
a45d7127	92	_exit(EXIT_SUCCESS);
fd38203a	93
151b9b96	94	assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
baf76283	95	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
fd38203a LP	96
	97	sd_event_source_unref(s);
	98
	99	return 1;
	100	}
	101
	102	static int defer_handler(sd_event_source s, void userdata) {
39883f62	103	sd_event_source *p = NULL;
fd38203a	104
0c0cdb06	105	assert_se(s);
fd38203a LP	106
	107	log_info("got defer on %c", PTR_TO_INT(userdata));
	108
0c0cdb06	109	assert_se(userdata == INT_TO_PTR('d'));
fd38203a	110
72c0a2c2 LP	111	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);
72c0a2c2 LP	112
151b9b96	113	assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
baf76283	114	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
fd38203a LP	115	raise(SIGUSR1);
	116
	117	sd_event_source_unref(s);
	118
	119	return 1;
	120	}
	121
	122	static bool do_quit = false;
	123
	124	static int time_handler(sd_event_source s, uint64_t usec, void userdata) {
	125	log_info("got timer on %c", PTR_TO_INT(userdata));
	126
	127	if (userdata == INT_TO_PTR('c')) {
	128
	129	if (do_quit) {
	130	sd_event_source *p;
	131
151b9b96	132	assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
baf76283	133	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
fd38203a	134	} else {
0c0cdb06	135	assert_se(!got_c);
fd38203a LP	136	got_c = true;
	137	}
	138	} else
	139	assert_not_reached("Huh?");
	140
	141	return 2;
	142	}
	143
6203e07a	144	static bool got_exit = false;
da7e457c	145
6203e07a	146	static int exit_handler(sd_event_source s, void userdata) {
da7e457c LP	147	log_info("got quit handler on %c", PTR_TO_INT(userdata));
da7e457c LP	148
6203e07a	149	got_exit = true;
da7e457c LP	150
	151	return 3;
	152	}
	153
509a07ad EV	154	static bool got_post = false;
	155
	156	static int post_handler(sd_event_source s, void userdata) {
	157	log_info("got post handler");
	158
	159	got_post = true;
	160
	161	return 2;
	162	}
	163
9da4cb2b	164	static void test_basic(void) {
fd38203a	165	sd_event *e = NULL;
12179984	166	sd_event_source w = NULL, x = NULL, y = NULL, z = NULL, q = NULL, t = NULL;
fd38203a	167	static const char ch = 'x';
12179984	168	int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
591df2b5	169	uint64_t event_now;
6680b8d1	170	int64_t priority;
fd38203a LP	171
	172	assert_se(pipe(a) >= 0);
	173	assert_se(pipe(b) >= 0);
9ec9694c	174	assert_se(pipe(d) >= 0);
12179984	175	assert_se(pipe(k) >= 0);
fd38203a	176
afc6adb5	177	assert_se(sd_event_default(&e) >= 0);
591df2b5	178	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
fd38203a	179
cde93897 LP	180	assert_se(sd_event_set_watchdog(e, true) >= 0);
cde93897 LP	181
12179984 LP	182	/* Test whether we cleanly can destroy an io event source from its own handler */
12179984 LP	183	got_unref = false;
151b9b96	184	assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
12179984 LP	185	assert_se(write(k[1], &ch, 1) == 1);
	186	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	187	assert_se(got_unref);
	188
9ec9694c DS	189	got_a = false, got_b = false, got_c = false, got_d = 0;
	190
	191	/* Add a oneshot handler, trigger it, re-enable it, and trigger
	192	* it again. */
151b9b96	193	assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
9ec9694c DS	194	assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
	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 == 1);
	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 == 2);
fd38203a	201
151b9b96 LP	202	assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
151b9b96 LP	203	assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
6a0f1f6d	204	assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
151b9b96	205	assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);
fd38203a LP	206
fd38203a LP	207	assert_se(sd_event_source_set_priority(x, 99) >= 0);
6680b8d1 ME	208	assert_se(sd_event_source_get_priority(x, &priority) >= 0);
6680b8d1 ME	209	assert_se(priority == 99);
baf76283	210	assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
fd38203a LP	211	assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
fd38203a LP	212	assert_se(sd_event_source_set_priority(z, 50) >= 0);
baf76283	213	assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
fd38203a	214	assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
a71fe8b8 LP	215
a71fe8b8 LP	216	/* Test for floating event sources */
72c0a2c2	217	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
a71fe8b8	218	assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);
fd38203a LP	219
	220	assert_se(write(a[1], &ch, 1) >= 0);
	221	assert_se(write(b[1], &ch, 1) >= 0);
	222
	223	assert_se(!got_a && !got_b && !got_c);
	224
	225	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	226
	227	assert_se(!got_a && got_b && !got_c);
	228
	229	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	230
	231	assert_se(!got_a && got_b && got_c);
	232
	233	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	234
	235	assert_se(got_a && got_b && got_c);
	236
	237	sd_event_source_unref(x);
	238	sd_event_source_unref(y);
	239
	240	do_quit = true;
509a07ad	241	assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
591df2b5 EV	242	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
591df2b5 EV	243	assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
baf76283	244	assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
fd38203a LP	245
fd38203a LP	246	assert_se(sd_event_loop(e) >= 0);
509a07ad	247	assert_se(got_post);
5657c75f	248	assert_se(got_exit);
fd38203a LP	249
fd38203a LP	250	sd_event_source_unref(z);
da7e457c	251	sd_event_source_unref(q);
fd38203a	252
d5e4ec5b LP	253	sd_event_source_unref(w);
d5e4ec5b LP	254
fd38203a LP	255	sd_event_unref(e);
fd38203a LP	256
3d94f76c LP	257	safe_close_pair(a);
	258	safe_close_pair(b);
	259	safe_close_pair(d);
	260	safe_close_pair(k);
9da4cb2b LP	261	}
9da4cb2b LP	262
2c86ba5a ZJS	263	static void test_sd_event_now(void) {
	264	_cleanup_(sd_event_unrefp) sd_event *e = NULL;
	265	uint64_t event_now;
	266
	267	assert_se(sd_event_new(&e) >= 0);
	268	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
	269	assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
	270	assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
3411372e LP	271	if (clock_boottime_supported()) {
	272	assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
	273	assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
	274	}
2c86ba5a ZJS	275	assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
	276	assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
	277
	278	assert_se(sd_event_run(e, 0) == 0);
	279
	280	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
	281	assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
	282	assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
3411372e LP	283	if (clock_boottime_supported()) {
	284	assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
	285	assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
	286	}
2c86ba5a ZJS	287	assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
	288	assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
	289	}
	290
9da4cb2b LP	291	static int last_rtqueue_sigval = 0;
	292	static int n_rtqueue = 0;
	293
	294	static int rtqueue_handler(sd_event_source s, const struct signalfd_siginfo si, void *userdata) {
	295	last_rtqueue_sigval = si->ssi_int;
313cefa1	296	n_rtqueue++;
9da4cb2b LP	297	return 0;
	298	}
	299
	300	static void test_rtqueue(void) {
	301	sd_event_source u = NULL, v = NULL, *s = NULL;
	302	sd_event *e = NULL;
	303
	304	assert_se(sd_event_default(&e) >= 0);
	305
	306	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
	307	assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
	308	assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
	309	assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);
	310
	311	assert_se(sd_event_source_set_priority(v, -10) >= 0);
	312
19500112 YW	313	assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
	314	assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
	315	assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
	316	assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
	317	assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);
9da4cb2b LP	318
	319	assert_se(n_rtqueue == 0);
	320	assert_se(last_rtqueue_sigval == 0);
	321
	322	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	323	assert_se(n_rtqueue == 1);
	324	assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */
	325
	326	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	327	assert_se(n_rtqueue == 2);
	328	assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */
	329
	330	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	331	assert_se(n_rtqueue == 3);
	332	assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */
	333
	334	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	335	assert_se(n_rtqueue == 4);
	336	assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */
	337
	338	assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
	339	assert_se(n_rtqueue == 4);
	340	assert_se(last_rtqueue_sigval == 1);
	341
	342	sd_event_source_unref(u);
	343	sd_event_source_unref(v);
	344	sd_event_source_unref(s);
	345
	346	sd_event_unref(e);
	347	}
	348
41e09d62 LP	349	#define CREATE_EVENTS_MAX (70000U)
	350
	351	struct inotify_context {
	352	bool delete_self_handler_called;
	353	unsigned create_called[CREATE_EVENTS_MAX];
	354	unsigned create_overflow;
	355	unsigned n_create_events;
	356	};
	357
	358	static void maybe_exit(sd_event_source s, struct inotify_context c) {
	359	unsigned n;
	360
	361	assert(s);
	362	assert(c);
	363
	364	if (!c->delete_self_handler_called)
	365	return;
	366
	367	for (n = 0; n < 3; n++) {
	368	unsigned i;
	369
	370	if (c->create_overflow & (1U << n))
	371	continue;
	372
	373	for (i = 0; i < c->n_create_events; i++)
	374	if (!(c->create_called[i] & (1U << n)))
	375	return;
	376	}
	377
	378	sd_event_exit(sd_event_source_get_event(s), 0);
	379	}
	380
	381	static int inotify_handler(sd_event_source s, const struct inotify_event ev, void *userdata) {
	382	struct inotify_context *c = userdata;
	383	const char *description;
	384	unsigned bit, n;
	385
	386	assert_se(sd_event_source_get_description(s, &description) >= 0);
	387	assert_se(safe_atou(description, &n) >= 0);
	388
	389	assert_se(n <= 3);
	390	bit = 1U << n;
	391
	392	if (ev->mask & IN_Q_OVERFLOW) {
	393	log_info("inotify-handler <%s>: overflow", description);
	394	c->create_overflow \|= bit;
	395	} else if (ev->mask & IN_CREATE) {
	396	unsigned i;
	397
	398	log_info("inotify-handler <%s>: create on %s", description, ev->name);
	399
	400	if (!streq(ev->name, "sub")) {
	401	assert_se(safe_atou(ev->name, &i) >= 0);
	402
	403	assert_se(i < c->n_create_events);
	404	c->create_called[i] \|= bit;
	405	}
	406	} else if (ev->mask & IN_DELETE) {
	407	log_info("inotify-handler <%s>: delete of %s", description, ev->name);
	408	assert_se(streq(ev->name, "sub"));
	409	} else
	410	assert_not_reached("unexpected inotify event");
	411
	412	maybe_exit(s, c);
413	return 1;
414	}
415
416	static int delete_self_handler(sd_event_source s, const struct inotify_event ev, void *userdata) {
417	struct inotify_context *c = userdata;
418
419	if (ev->mask & IN_Q_OVERFLOW) {
420	log_info("delete-self-handler: overflow");
421	c->delete_self_handler_called = true;
422	} else if (ev->mask & IN_DELETE_SELF) {
423	log_info("delete-self-handler: delete-self");
424	c->delete_self_handler_called = true;
425	} else if (ev->mask & IN_IGNORED) {
426	log_info("delete-self-handler: ignore");
427	} else
428	assert_not_reached("unexpected inotify event (delete-self)");
429
430	maybe_exit(s, c);
431	return 1;
432	}
433
434	static void test_inotify(unsigned n_create_events) {
435	_cleanup_(rm_rf_physical_and_freep) char *p = NULL;
436	sd_event_source a = NULL, b = NULL, c = NULL, d = NULL;
437	struct inotify_context context = {
438	.n_create_events = n_create_events,
439	};
440	sd_event *e = NULL;
441	const char *q;
442	unsigned i;
443
444	assert_se(sd_event_default(&e) >= 0);
445
446	assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0);
447
448	assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE\|IN_ONLYDIR, inotify_handler, &context) >= 0);
449	assert_se(sd_event_add_inotify(e, &b, p, IN_CREATE\|IN_DELETE\|IN_DONT_FOLLOW, inotify_handler, &context) >= 0);
450	assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE) >= 0);
451	assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL) >= 0);
452	assert_se(sd_event_add_inotify(e, &c, p, IN_CREATE\|IN_DELETE\|IN_EXCL_UNLINK, inotify_handler, &context) >= 0);
453	assert_se(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE) >= 0);
454
455	assert_se(sd_event_source_set_description(a, "0") >= 0);
456	assert_se(sd_event_source_set_description(b, "1") >= 0);
457	assert_se(sd_event_source_set_description(c, "2") >= 0);
458
459	q = strjoina(p, "/sub");
460	assert_se(touch(q) >= 0);
461	assert_se(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context) >= 0);
462
463	for (i = 0; i < n_create_events; i++) {
464	char buf[DECIMAL_STR_MAX(unsigned)+1];
465	_cleanup_free_ char *z;
466
467	xsprintf(buf, "%u", i);
468	assert_se(z = strjoin(p, "/", buf));
469
470	assert_se(touch(z) >= 0);
471	}
472
473	assert_se(unlink(q) >= 0);
474
475	assert_se(sd_event_loop(e) >= 0);
476
477	sd_event_source_unref(a);
478	sd_event_source_unref(b);
479	sd_event_source_unref(c);
480	sd_event_source_unref(d);
481
482	sd_event_unref(e);
483	}
484
9da4cb2b LP	485	int main(int argc, char *argv[]) {
9da4cb2b LP	486
2c86ba5a ZJS	487	log_set_max_level(LOG_DEBUG);
	488	log_parse_environment();
	489
9da4cb2b	490	test_basic();
2c86ba5a	491	test_sd_event_now();
9da4cb2b	492	test_rtqueue();
fd38203a	493
41e09d62 LP	494	test_inotify(100); /* should work without overflow */
	495	test_inotify(33000); /* should trigger a q overflow */
	496
fd38203a LP	497	return 0;
fd38203a LP	498	}