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Diffstat (limited to 'src/libsystemd/sd-event')
-rw-r--r--src/libsystemd/sd-event/sd-event.c68
1 files changed, 38 insertions, 30 deletions
diff --git a/src/libsystemd/sd-event/sd-event.c b/src/libsystemd/sd-event/sd-event.c
index c5f062b3e0..80a2ae97e8 100644
--- a/src/libsystemd/sd-event/sd-event.c
+++ b/src/libsystemd/sd-event/sd-event.c
@@ -598,6 +598,36 @@ static bool need_signal(sd_event *e, int signal) {
e->n_enabled_child_sources > 0);
}
+static int event_update_signal_fd(sd_event *e) {
+ struct epoll_event ev = {};
+ bool add_to_epoll;
+ int r;
+
+ assert(e);
+
+ add_to_epoll = e->signal_fd < 0;
+
+ r = signalfd(e->signal_fd, &e->sigset, SFD_NONBLOCK|SFD_CLOEXEC);
+ if (r < 0)
+ return -errno;
+
+ e->signal_fd = r;
+
+ if (!add_to_epoll)
+ return 0;
+
+ ev.events = EPOLLIN;
+ ev.data.ptr = INT_TO_PTR(SOURCE_SIGNAL);
+
+ r = epoll_ctl(e->epoll_fd, EPOLL_CTL_ADD, e->signal_fd, &ev);
+ if (r < 0) {
+ e->signal_fd = safe_close(e->signal_fd);
+ return -errno;
+ }
+
+ return 0;
+}
+
static void source_disconnect(sd_event_source *s) {
sd_event *event;
@@ -640,6 +670,10 @@ static void source_disconnect(sd_event_source *s) {
/* If the signal was on and now it is off... */
if (s->enabled != SD_EVENT_OFF && !need_signal(s->event, s->signal.sig)) {
assert_se(sigdelset(&s->event->sigset, s->signal.sig) == 0);
+
+ (void) event_update_signal_fd(s->event);
+ /* If disabling failed, we might get a spurious event,
+ * but otherwise nothing bad should happen. */
}
}
@@ -654,6 +688,10 @@ static void source_disconnect(sd_event_source *s) {
/* We know the signal was on, if it is off now... */
if (!need_signal(s->event, SIGCHLD)) {
assert_se(sigdelset(&s->event->sigset, SIGCHLD) == 0);
+
+ (void) event_update_signal_fd(s->event);
+ /* If disabling failed, we might get a spurious event,
+ * but otherwise nothing bad should happen. */
}
}
@@ -929,36 +967,6 @@ fail:
return r;
}
-static int event_update_signal_fd(sd_event *e) {
- struct epoll_event ev = {};
- bool add_to_epoll;
- int r;
-
- assert(e);
-
- add_to_epoll = e->signal_fd < 0;
-
- r = signalfd(e->signal_fd, &e->sigset, SFD_NONBLOCK|SFD_CLOEXEC);
- if (r < 0)
- return -errno;
-
- e->signal_fd = r;
-
- if (!add_to_epoll)
- return 0;
-
- ev.events = EPOLLIN;
- ev.data.ptr = INT_TO_PTR(SOURCE_SIGNAL);
-
- r = epoll_ctl(e->epoll_fd, EPOLL_CTL_ADD, e->signal_fd, &ev);
- if (r < 0) {
- e->signal_fd = safe_close(e->signal_fd);
- return -errno;
- }
-
- return 0;
-}
-
static int signal_exit_callback(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
assert(s);