+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
- This file is part of systemd.
-
- Copyright 2013 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#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"
+/// Additional includes needed by elogind
+#include "process-util.h"
static int prepare_handler(sd_event_source *s, void *userdata) {
log_info("preparing %c", PTR_TO_INT(userdata));
assert_se(pid >= 0);
if (pid == 0)
- _exit(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);
got_a = false, got_b = false, got_c = false, got_d = 0;
- /* Add a oneshot handler, trigger it, re-enable it, and trigger
+ /* 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(sd_event_source_set_priority(v, -10) >= 0);
- assert(sigqueue(getpid_cached(), SIGRTMIN+2, (union sigval) { .sival_int = 1 }) >= 0);
- assert(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 2 }) >= 0);
- assert(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 3 }) >= 0);
- assert(sigqueue(getpid_cached(), SIGRTMIN+3, (union sigval) { .sival_int = 4 }) >= 0);
- assert(sigqueue(getpid_cached(), SIGUSR2, (union sigval) { .sival_int = 5 }) >= 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);
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);
test_sd_event_now();
test_rtqueue();
+ test_inotify(100); /* should work without overflow */
+ test_inotify(33000); /* should trigger a q overflow */
+
return 0;
}
~ianmdlvl / elogind.git / blobdiff