[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, reenable 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
fe993888 MS	3	#include <sys/wait.h>
fe993888 MS	4
fd38203a	5	#include "sd-event.h"
3ffd4af2	6
41e09d62	7	#include "alloc-util.h"
3ffd4af2	8	#include "fd-util.h"
41e09d62 LP	9	#include "fileio.h"
41e09d62 LP	10	#include "fs-util.h"
fd38203a	11	#include "log.h"
0c0cdb06	12	#include "macro.h"
41e09d62 LP	13	#include "parse-util.h"
	14	#include "process-util.h"
	15	#include "rm-rf.h"
24882e06	16	#include "signal-util.h"
41e09d62 LP	17	#include "stdio-util.h"
41e09d62 LP	18	#include "string-util.h"
3ffd4af2	19	#include "util.h"
fd38203a LP	20
	21	static int prepare_handler(sd_event_source s, void userdata) {
	22	log_info("preparing %c", PTR_TO_INT(userdata));
	23	return 1;
	24	}
	25
12179984	26	static bool got_a, got_b, got_c, got_unref;
9ec9694c	27	static unsigned got_d;
fd38203a	28
12179984 LP	29	static int unref_handler(sd_event_source s, int fd, uint32_t revents, void userdata) {
	30	sd_event_source_unref(s);
	31	got_unref = true;
	32	return 0;
	33	}
	34
fd38203a LP	35	static int io_handler(sd_event_source s, int fd, uint32_t revents, void userdata) {
	36
	37	log_info("got IO on %c", PTR_TO_INT(userdata));
	38
	39	if (userdata == INT_TO_PTR('a')) {
baf76283	40	assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
fd38203a LP	41	assert_se(!got_a);
	42	got_a = true;
	43	} else if (userdata == INT_TO_PTR('b')) {
	44	assert_se(!got_b);
	45	got_b = true;
9ec9694c DS	46	} else if (userdata == INT_TO_PTR('d')) {
	47	got_d++;
	48	if (got_d < 2)
	49	assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
	50	else
	51	assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
fd38203a LP	52	} else
	53	assert_not_reached("Yuck!");
	54
	55	return 1;
	56	}
	57
	58	static int child_handler(sd_event_source s, const siginfo_t si, void *userdata) {
	59
0c0cdb06 RC	60	assert_se(s);
0c0cdb06 RC	61	assert_se(si);
fd38203a LP	62
	63	log_info("got child on %c", PTR_TO_INT(userdata));
	64
0c0cdb06	65	assert_se(userdata == INT_TO_PTR('f'));
fd38203a	66
6203e07a	67	assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
fd38203a LP	68	sd_event_source_unref(s);
	69
	70	return 1;
	71	}
	72
	73	static int signal_handler(sd_event_source s, const struct signalfd_siginfo si, void *userdata) {
39883f62	74	sd_event_source *p = NULL;
fd38203a LP	75	pid_t pid;
fd38203a LP	76
0c0cdb06 RC	77	assert_se(s);
0c0cdb06 RC	78	assert_se(si);
fd38203a LP	79
	80	log_info("got signal on %c", PTR_TO_INT(userdata));
	81
0c0cdb06	82	assert_se(userdata == INT_TO_PTR('e'));
fd38203a	83
72c0a2c2	84	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
fd38203a LP	85
	86	pid = fork();
	87	assert_se(pid >= 0);
	88
	89	if (pid == 0)
a45d7127	90	_exit(EXIT_SUCCESS);
fd38203a	91
151b9b96	92	assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
baf76283	93	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
fd38203a LP	94
	95	sd_event_source_unref(s);
	96
	97	return 1;
	98	}
	99
	100	static int defer_handler(sd_event_source s, void userdata) {
39883f62	101	sd_event_source *p = NULL;
fd38203a	102
0c0cdb06	103	assert_se(s);
fd38203a LP	104
	105	log_info("got defer on %c", PTR_TO_INT(userdata));
	106
0c0cdb06	107	assert_se(userdata == INT_TO_PTR('d'));
fd38203a	108
72c0a2c2 LP	109	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);
72c0a2c2 LP	110
151b9b96	111	assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
baf76283	112	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
fd38203a LP	113	raise(SIGUSR1);
	114
	115	sd_event_source_unref(s);
	116
	117	return 1;
	118	}
	119
	120	static bool do_quit = false;
	121
	122	static int time_handler(sd_event_source s, uint64_t usec, void userdata) {
	123	log_info("got timer on %c", PTR_TO_INT(userdata));
	124
	125	if (userdata == INT_TO_PTR('c')) {
	126
	127	if (do_quit) {
	128	sd_event_source *p;
	129
151b9b96	130	assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
baf76283	131	assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
fd38203a	132	} else {
0c0cdb06	133	assert_se(!got_c);
fd38203a LP	134	got_c = true;
	135	}
	136	} else
	137	assert_not_reached("Huh?");
	138
	139	return 2;
	140	}
	141
6203e07a	142	static bool got_exit = false;
da7e457c	143
6203e07a	144	static int exit_handler(sd_event_source s, void userdata) {
da7e457c LP	145	log_info("got quit handler on %c", PTR_TO_INT(userdata));
da7e457c LP	146
6203e07a	147	got_exit = true;
da7e457c LP	148
	149	return 3;
	150	}
	151
509a07ad EV	152	static bool got_post = false;
	153
	154	static int post_handler(sd_event_source s, void userdata) {
	155	log_info("got post handler");
	156
	157	got_post = true;
	158
	159	return 2;
	160	}
	161
9da4cb2b	162	static void test_basic(void) {
fd38203a	163	sd_event *e = NULL;
12179984	164	sd_event_source w = NULL, x = NULL, y = NULL, z = NULL, q = NULL, t = NULL;
fd38203a	165	static const char ch = 'x';
12179984	166	int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
591df2b5	167	uint64_t event_now;
6680b8d1	168	int64_t priority;
fd38203a LP	169
	170	assert_se(pipe(a) >= 0);
	171	assert_se(pipe(b) >= 0);
9ec9694c	172	assert_se(pipe(d) >= 0);
12179984	173	assert_se(pipe(k) >= 0);
fd38203a	174
afc6adb5	175	assert_se(sd_event_default(&e) >= 0);
591df2b5	176	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
fd38203a	177
cde93897 LP	178	assert_se(sd_event_set_watchdog(e, true) >= 0);
cde93897 LP	179
12179984 LP	180	/* Test whether we cleanly can destroy an io event source from its own handler */
12179984 LP	181	got_unref = false;
151b9b96	182	assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
12179984 LP	183	assert_se(write(k[1], &ch, 1) == 1);
	184	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	185	assert_se(got_unref);
	186
9ec9694c DS	187	got_a = false, got_b = false, got_c = false, got_d = 0;
9ec9694c DS	188
3fe91079	189	/* Add a oneshot handler, trigger it, reenable it, and trigger
9ec9694c	190	* it again. */
151b9b96	191	assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
9ec9694c DS	192	assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
	193	assert_se(write(d[1], &ch, 1) >= 0);
	194	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	195	assert_se(got_d == 1);
	196	assert_se(write(d[1], &ch, 1) >= 0);
	197	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	198	assert_se(got_d == 2);
fd38203a	199
151b9b96 LP	200	assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
151b9b96 LP	201	assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
6a0f1f6d	202	assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
151b9b96	203	assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);
fd38203a LP	204
fd38203a LP	205	assert_se(sd_event_source_set_priority(x, 99) >= 0);
6680b8d1 ME	206	assert_se(sd_event_source_get_priority(x, &priority) >= 0);
6680b8d1 ME	207	assert_se(priority == 99);
baf76283	208	assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
fd38203a LP	209	assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
fd38203a LP	210	assert_se(sd_event_source_set_priority(z, 50) >= 0);
baf76283	211	assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
fd38203a	212	assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
a71fe8b8 LP	213
a71fe8b8 LP	214	/* Test for floating event sources */
72c0a2c2	215	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
a71fe8b8	216	assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);
fd38203a LP	217
	218	assert_se(write(a[1], &ch, 1) >= 0);
	219	assert_se(write(b[1], &ch, 1) >= 0);
	220
	221	assert_se(!got_a && !got_b && !got_c);
	222
	223	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	224
	225	assert_se(!got_a && got_b && !got_c);
	226
	227	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	228
	229	assert_se(!got_a && got_b && got_c);
	230
	231	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	232
	233	assert_se(got_a && got_b && got_c);
	234
	235	sd_event_source_unref(x);
	236	sd_event_source_unref(y);
	237
	238	do_quit = true;
509a07ad	239	assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
591df2b5 EV	240	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
591df2b5 EV	241	assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
baf76283	242	assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
fd38203a LP	243
fd38203a LP	244	assert_se(sd_event_loop(e) >= 0);
509a07ad	245	assert_se(got_post);
5657c75f	246	assert_se(got_exit);
fd38203a LP	247
fd38203a LP	248	sd_event_source_unref(z);
da7e457c	249	sd_event_source_unref(q);
fd38203a	250
d5e4ec5b LP	251	sd_event_source_unref(w);
d5e4ec5b LP	252
fd38203a LP	253	sd_event_unref(e);
fd38203a LP	254
3d94f76c LP	255	safe_close_pair(a);
	256	safe_close_pair(b);
	257	safe_close_pair(d);
	258	safe_close_pair(k);
9da4cb2b LP	259	}
9da4cb2b LP	260
2c86ba5a ZJS	261	static void test_sd_event_now(void) {
	262	_cleanup_(sd_event_unrefp) sd_event *e = NULL;
	263	uint64_t event_now;
	264
	265	assert_se(sd_event_new(&e) >= 0);
	266	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
	267	assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
	268	assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
3411372e LP	269	if (clock_boottime_supported()) {
	270	assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
	271	assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
	272	}
2c86ba5a ZJS	273	assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
	274	assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
	275
	276	assert_se(sd_event_run(e, 0) == 0);
	277
	278	assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
	279	assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
	280	assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
3411372e LP	281	if (clock_boottime_supported()) {
	282	assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
	283	assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
	284	}
2c86ba5a ZJS	285	assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
	286	assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
	287	}
	288
9da4cb2b LP	289	static int last_rtqueue_sigval = 0;
	290	static int n_rtqueue = 0;
	291
	292	static int rtqueue_handler(sd_event_source s, const struct signalfd_siginfo si, void *userdata) {
	293	last_rtqueue_sigval = si->ssi_int;
313cefa1	294	n_rtqueue++;
9da4cb2b LP	295	return 0;
	296	}
	297
	298	static void test_rtqueue(void) {
	299	sd_event_source u = NULL, v = NULL, *s = NULL;
	300	sd_event *e = NULL;
	301
	302	assert_se(sd_event_default(&e) >= 0);
	303
	304	assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
	305	assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
	306	assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
	307	assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);
	308
	309	assert_se(sd_event_source_set_priority(v, -10) >= 0);
	310
19500112 YW	311	assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
	312	assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
	313	assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
	314	assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
	315	assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);
9da4cb2b LP	316
	317	assert_se(n_rtqueue == 0);
	318	assert_se(last_rtqueue_sigval == 0);
	319
	320	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	321	assert_se(n_rtqueue == 1);
	322	assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */
	323
	324	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	325	assert_se(n_rtqueue == 2);
	326	assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */
	327
	328	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	329	assert_se(n_rtqueue == 3);
	330	assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */
	331
	332	assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
	333	assert_se(n_rtqueue == 4);
	334	assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */
	335
	336	assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
	337	assert_se(n_rtqueue == 4);
	338	assert_se(last_rtqueue_sigval == 1);
	339
	340	sd_event_source_unref(u);
	341	sd_event_source_unref(v);
	342	sd_event_source_unref(s);
	343
	344	sd_event_unref(e);
	345	}
	346
41e09d62 LP	347	#define CREATE_EVENTS_MAX (70000U)
	348
	349	struct inotify_context {
	350	bool delete_self_handler_called;
	351	unsigned create_called[CREATE_EVENTS_MAX];
	352	unsigned create_overflow;
	353	unsigned n_create_events;
	354	};
	355
	356	static void maybe_exit(sd_event_source s, struct inotify_context c) {
	357	unsigned n;
	358
	359	assert(s);
	360	assert(c);
	361
	362	if (!c->delete_self_handler_called)
	363	return;
	364
	365	for (n = 0; n < 3; n++) {
	366	unsigned i;
	367
	368	if (c->create_overflow & (1U << n))
	369	continue;
	370
	371	for (i = 0; i < c->n_create_events; i++)
	372	if (!(c->create_called[i] & (1U << n)))
	373	return;
	374	}
	375
	376	sd_event_exit(sd_event_source_get_event(s), 0);
	377	}
	378
	379	static int inotify_handler(sd_event_source s, const struct inotify_event ev, void *userdata) {
	380	struct inotify_context *c = userdata;
	381	const char *description;
	382	unsigned bit, n;
	383
	384	assert_se(sd_event_source_get_description(s, &description) >= 0);
	385	assert_se(safe_atou(description, &n) >= 0);
	386
	387	assert_se(n <= 3);
	388	bit = 1U << n;
	389
	390	if (ev->mask & IN_Q_OVERFLOW) {
	391	log_info("inotify-handler <%s>: overflow", description);
	392	c->create_overflow \|= bit;
	393	} else if (ev->mask & IN_CREATE) {
	394	unsigned i;
	395
	396	log_info("inotify-handler <%s>: create on %s", description, ev->name);
	397
	398	if (!streq(ev->name, "sub")) {
	399	assert_se(safe_atou(ev->name, &i) >= 0);
	400
	401	assert_se(i < c->n_create_events);
	402	c->create_called[i] \|= bit;
	403	}
	404	} else if (ev->mask & IN_DELETE) {
	405	log_info("inotify-handler <%s>: delete of %s", description, ev->name);
	406	assert_se(streq(ev->name, "sub"));
	407	} else
	408	assert_not_reached("unexpected inotify event");
	409
	410	maybe_exit(s, c);
411	return 1;
412	}
413
414	static int delete_self_handler(sd_event_source s, const struct inotify_event ev, void *userdata) {
415	struct inotify_context *c = userdata;
416
417	if (ev->mask & IN_Q_OVERFLOW) {
418	log_info("delete-self-handler: overflow");
419	c->delete_self_handler_called = true;
420	} else if (ev->mask & IN_DELETE_SELF) {
421	log_info("delete-self-handler: delete-self");
422	c->delete_self_handler_called = true;
423	} else if (ev->mask & IN_IGNORED) {
424	log_info("delete-self-handler: ignore");
425	} else
426	assert_not_reached("unexpected inotify event (delete-self)");
427
428	maybe_exit(s, c);
429	return 1;
430	}
431
432	static void test_inotify(unsigned n_create_events) {
433	_cleanup_(rm_rf_physical_and_freep) char *p = NULL;
434	sd_event_source a = NULL, b = NULL, c = NULL, d = NULL;
435	struct inotify_context context = {
436	.n_create_events = n_create_events,
437	};
438	sd_event *e = NULL;
439	const char *q;
440	unsigned i;
441
442	assert_se(sd_event_default(&e) >= 0);
443
444	assert_se(mkdtemp_malloc("/tmp/test-inotify-XXXXXX", &p) >= 0);
445
446	assert_se(sd_event_add_inotify(e, &a, p, IN_CREATE\|IN_ONLYDIR, inotify_handler, &context) >= 0);
447	assert_se(sd_event_add_inotify(e, &b, p, IN_CREATE\|IN_DELETE\|IN_DONT_FOLLOW, inotify_handler, &context) >= 0);
448	assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_IDLE) >= 0);
449	assert_se(sd_event_source_set_priority(b, SD_EVENT_PRIORITY_NORMAL) >= 0);
450	assert_se(sd_event_add_inotify(e, &c, p, IN_CREATE\|IN_DELETE\|IN_EXCL_UNLINK, inotify_handler, &context) >= 0);
451	assert_se(sd_event_source_set_priority(c, SD_EVENT_PRIORITY_IDLE) >= 0);
452
453	assert_se(sd_event_source_set_description(a, "0") >= 0);
454	assert_se(sd_event_source_set_description(b, "1") >= 0);
455	assert_se(sd_event_source_set_description(c, "2") >= 0);
456
457	q = strjoina(p, "/sub");
458	assert_se(touch(q) >= 0);
459	assert_se(sd_event_add_inotify(e, &d, q, IN_DELETE_SELF, delete_self_handler, &context) >= 0);
460
461	for (i = 0; i < n_create_events; i++) {
462	char buf[DECIMAL_STR_MAX(unsigned)+1];
463	_cleanup_free_ char *z;
464
465	xsprintf(buf, "%u", i);
466	assert_se(z = strjoin(p, "/", buf));
467
468	assert_se(touch(z) >= 0);
469	}
470
471	assert_se(unlink(q) >= 0);
472
473	assert_se(sd_event_loop(e) >= 0);
474
475	sd_event_source_unref(a);
476	sd_event_source_unref(b);
477	sd_event_source_unref(c);
478	sd_event_source_unref(d);
479
480	sd_event_unref(e);
481	}
482
9da4cb2b LP	483	int main(int argc, char *argv[]) {
9da4cb2b LP	484
2c86ba5a ZJS	485	log_set_max_level(LOG_DEBUG);
	486	log_parse_environment();
	487
9da4cb2b	488	test_basic();
2c86ba5a	489	test_sd_event_now();
9da4cb2b	490	test_rtqueue();
fd38203a	491
41e09d62 LP	492	test_inotify(100); /* should work without overflow */
	493	test_inotify(33000); /* should trigger a q overflow */
	494
fd38203a LP	495	return 0;
fd38203a LP	496	}