368 lines
12 KiB
C
368 lines
12 KiB
C
/* SPDX-License-Identifier: LGPL-2.1+ */
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <sys/wait.h>
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#include "sd-event.h"
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#include "fd-util.h"
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#include "log.h"
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#include "macro.h"
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#include "signal-util.h"
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#include "util.h"
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static int prepare_handler(sd_event_source *s, void *userdata) {
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log_info("preparing %c", PTR_TO_INT(userdata));
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return 1;
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}
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static bool got_a, got_b, got_c, got_unref;
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static unsigned got_d;
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static int unref_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
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sd_event_source_unref(s);
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got_unref = true;
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return 0;
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}
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static int io_handler(sd_event_source *s, int fd, uint32_t revents, void *userdata) {
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log_info("got IO on %c", PTR_TO_INT(userdata));
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if (userdata == INT_TO_PTR('a')) {
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assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
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assert_se(!got_a);
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got_a = true;
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} else if (userdata == INT_TO_PTR('b')) {
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assert_se(!got_b);
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got_b = true;
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} else if (userdata == INT_TO_PTR('d')) {
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got_d++;
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if (got_d < 2)
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assert_se(sd_event_source_set_enabled(s, SD_EVENT_ONESHOT) >= 0);
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else
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assert_se(sd_event_source_set_enabled(s, SD_EVENT_OFF) >= 0);
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} else
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assert_not_reached("Yuck!");
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return 1;
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}
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static int child_handler(sd_event_source *s, const siginfo_t *si, void *userdata) {
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assert_se(s);
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assert_se(si);
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log_info("got child on %c", PTR_TO_INT(userdata));
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assert_se(userdata == INT_TO_PTR('f'));
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assert_se(sd_event_exit(sd_event_source_get_event(s), 0) >= 0);
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sd_event_source_unref(s);
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return 1;
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}
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static int signal_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
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sd_event_source *p = NULL;
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pid_t pid;
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assert_se(s);
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assert_se(si);
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log_info("got signal on %c", PTR_TO_INT(userdata));
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assert_se(userdata == INT_TO_PTR('e'));
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assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGCHLD, -1) >= 0);
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pid = fork();
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assert_se(pid >= 0);
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if (pid == 0)
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_exit(EXIT_SUCCESS);
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assert_se(sd_event_add_child(sd_event_source_get_event(s), &p, pid, WEXITED, child_handler, INT_TO_PTR('f')) >= 0);
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assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
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sd_event_source_unref(s);
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return 1;
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}
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static int defer_handler(sd_event_source *s, void *userdata) {
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sd_event_source *p = NULL;
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assert_se(s);
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log_info("got defer on %c", PTR_TO_INT(userdata));
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assert_se(userdata == INT_TO_PTR('d'));
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assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGUSR1, -1) >= 0);
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assert_se(sd_event_add_signal(sd_event_source_get_event(s), &p, SIGUSR1, signal_handler, INT_TO_PTR('e')) >= 0);
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assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
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raise(SIGUSR1);
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sd_event_source_unref(s);
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return 1;
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}
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static bool do_quit = false;
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static int time_handler(sd_event_source *s, uint64_t usec, void *userdata) {
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log_info("got timer on %c", PTR_TO_INT(userdata));
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if (userdata == INT_TO_PTR('c')) {
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if (do_quit) {
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sd_event_source *p;
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assert_se(sd_event_add_defer(sd_event_source_get_event(s), &p, defer_handler, INT_TO_PTR('d')) >= 0);
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assert_se(sd_event_source_set_enabled(p, SD_EVENT_ONESHOT) >= 0);
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} else {
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assert_se(!got_c);
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got_c = true;
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}
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} else
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assert_not_reached("Huh?");
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return 2;
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}
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static bool got_exit = false;
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static int exit_handler(sd_event_source *s, void *userdata) {
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log_info("got quit handler on %c", PTR_TO_INT(userdata));
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got_exit = true;
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return 3;
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}
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static bool got_post = false;
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static int post_handler(sd_event_source *s, void *userdata) {
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log_info("got post handler");
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got_post = true;
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return 2;
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}
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static void test_basic(void) {
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sd_event *e = NULL;
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sd_event_source *w = NULL, *x = NULL, *y = NULL, *z = NULL, *q = NULL, *t = NULL;
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static const char ch = 'x';
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int a[2] = { -1, -1 }, b[2] = { -1, -1}, d[2] = { -1, -1}, k[2] = { -1, -1 };
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uint64_t event_now;
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int64_t priority;
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assert_se(pipe(a) >= 0);
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assert_se(pipe(b) >= 0);
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assert_se(pipe(d) >= 0);
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assert_se(pipe(k) >= 0);
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assert_se(sd_event_default(&e) >= 0);
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assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
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assert_se(sd_event_set_watchdog(e, true) >= 0);
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/* Test whether we cleanly can destroy an io event source from its own handler */
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got_unref = false;
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assert_se(sd_event_add_io(e, &t, k[0], EPOLLIN, unref_handler, NULL) >= 0);
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assert_se(write(k[1], &ch, 1) == 1);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(got_unref);
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got_a = false, got_b = false, got_c = false, got_d = 0;
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/* Add a oneshot handler, trigger it, re-enable it, and trigger
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* it again. */
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assert_se(sd_event_add_io(e, &w, d[0], EPOLLIN, io_handler, INT_TO_PTR('d')) >= 0);
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assert_se(sd_event_source_set_enabled(w, SD_EVENT_ONESHOT) >= 0);
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assert_se(write(d[1], &ch, 1) >= 0);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(got_d == 1);
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assert_se(write(d[1], &ch, 1) >= 0);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(got_d == 2);
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assert_se(sd_event_add_io(e, &x, a[0], EPOLLIN, io_handler, INT_TO_PTR('a')) >= 0);
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assert_se(sd_event_add_io(e, &y, b[0], EPOLLIN, io_handler, INT_TO_PTR('b')) >= 0);
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assert_se(sd_event_add_time(e, &z, CLOCK_MONOTONIC, 0, 0, time_handler, INT_TO_PTR('c')) >= 0);
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assert_se(sd_event_add_exit(e, &q, exit_handler, INT_TO_PTR('g')) >= 0);
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assert_se(sd_event_source_set_priority(x, 99) >= 0);
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assert_se(sd_event_source_get_priority(x, &priority) >= 0);
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assert_se(priority == 99);
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assert_se(sd_event_source_set_enabled(y, SD_EVENT_ONESHOT) >= 0);
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assert_se(sd_event_source_set_prepare(x, prepare_handler) >= 0);
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assert_se(sd_event_source_set_priority(z, 50) >= 0);
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assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
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assert_se(sd_event_source_set_prepare(z, prepare_handler) >= 0);
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/* Test for floating event sources */
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assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+1, -1) >= 0);
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assert_se(sd_event_add_signal(e, NULL, SIGRTMIN+1, NULL, NULL) >= 0);
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assert_se(write(a[1], &ch, 1) >= 0);
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assert_se(write(b[1], &ch, 1) >= 0);
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assert_se(!got_a && !got_b && !got_c);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(!got_a && got_b && !got_c);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(!got_a && got_b && got_c);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(got_a && got_b && got_c);
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sd_event_source_unref(x);
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sd_event_source_unref(y);
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do_quit = true;
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assert_se(sd_event_add_post(e, NULL, post_handler, NULL) >= 0);
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assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
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assert_se(sd_event_source_set_time(z, event_now + 200 * USEC_PER_MSEC) >= 0);
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assert_se(sd_event_source_set_enabled(z, SD_EVENT_ONESHOT) >= 0);
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assert_se(sd_event_loop(e) >= 0);
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assert_se(got_post);
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assert_se(got_exit);
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sd_event_source_unref(z);
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sd_event_source_unref(q);
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sd_event_source_unref(w);
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sd_event_unref(e);
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safe_close_pair(a);
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safe_close_pair(b);
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safe_close_pair(d);
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safe_close_pair(k);
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}
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static void test_sd_event_now(void) {
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_cleanup_(sd_event_unrefp) sd_event *e = NULL;
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uint64_t event_now;
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assert_se(sd_event_new(&e) >= 0);
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assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) > 0);
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assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) > 0);
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assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) > 0);
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if (clock_boottime_supported()) {
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assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) > 0);
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assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) > 0);
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}
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assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
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assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
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assert_se(sd_event_run(e, 0) == 0);
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assert_se(sd_event_now(e, CLOCK_MONOTONIC, &event_now) == 0);
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assert_se(sd_event_now(e, CLOCK_REALTIME, &event_now) == 0);
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assert_se(sd_event_now(e, CLOCK_REALTIME_ALARM, &event_now) == 0);
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if (clock_boottime_supported()) {
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assert_se(sd_event_now(e, CLOCK_BOOTTIME, &event_now) == 0);
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assert_se(sd_event_now(e, CLOCK_BOOTTIME_ALARM, &event_now) == 0);
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}
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assert_se(sd_event_now(e, -1, &event_now) == -EOPNOTSUPP);
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assert_se(sd_event_now(e, 900 /* arbitrary big number */, &event_now) == -EOPNOTSUPP);
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}
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static int last_rtqueue_sigval = 0;
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static int n_rtqueue = 0;
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static int rtqueue_handler(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
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last_rtqueue_sigval = si->ssi_int;
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n_rtqueue++;
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return 0;
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}
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static void test_rtqueue(void) {
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sd_event_source *u = NULL, *v = NULL, *s = NULL;
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sd_event *e = NULL;
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assert_se(sd_event_default(&e) >= 0);
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assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGRTMIN+2, SIGRTMIN+3, SIGUSR2, -1) >= 0);
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assert_se(sd_event_add_signal(e, &u, SIGRTMIN+2, rtqueue_handler, NULL) >= 0);
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assert_se(sd_event_add_signal(e, &v, SIGRTMIN+3, rtqueue_handler, NULL) >= 0);
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assert_se(sd_event_add_signal(e, &s, SIGUSR2, rtqueue_handler, NULL) >= 0);
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assert_se(sd_event_source_set_priority(v, -10) >= 0);
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assert_se(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
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assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
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assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
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assert_se(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
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assert_se(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 0);
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assert_se(n_rtqueue == 0);
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assert_se(last_rtqueue_sigval == 0);
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(n_rtqueue == 1);
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assert_se(last_rtqueue_sigval == 2); /* first SIGRTMIN+3 */
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(n_rtqueue == 2);
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assert_se(last_rtqueue_sigval == 4); /* second SIGRTMIN+3 */
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(n_rtqueue == 3);
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assert_se(last_rtqueue_sigval == 3); /* first SIGUSR2 */
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assert_se(sd_event_run(e, (uint64_t) -1) >= 1);
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assert_se(n_rtqueue == 4);
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assert_se(last_rtqueue_sigval == 1); /* SIGRTMIN+2 */
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assert_se(sd_event_run(e, 0) == 0); /* the other SIGUSR2 is dropped, because the first one was still queued */
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assert_se(n_rtqueue == 4);
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assert_se(last_rtqueue_sigval == 1);
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sd_event_source_unref(u);
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sd_event_source_unref(v);
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sd_event_source_unref(s);
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sd_event_unref(e);
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}
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int main(int argc, char *argv[]) {
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log_set_max_level(LOG_DEBUG);
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log_parse_environment();
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test_basic();
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test_sd_event_now();
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test_rtqueue();
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return 0;
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}
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