sd-event: initialize return value

[elogind.git] / src / libsystemd-bus / sd-event.c

diff --git a/src/libsystemd-bus/sd-event.c b/src/libsystemd-bus/sd-event.c
index 96ba2ad269cc10cc02f4d3ff20704ba619c15952..19fa982ed391356784eeebc5ac669fe8f11173d2 100644 (file)
--- a/src/libsystemd-bus/sd-event.c
+++ b/src/libsystemd-bus/sd-event.c
@@ -493,6 +493,10 @@ static void source_free(sd_event_source *s) {
 
                         break;
 
+                case SOURCE_DEFER:
+                        /* nothing */
+                        break;
+
                 case SOURCE_QUIT:
                         prioq_remove(s->event->quit, s, &s->quit.prioq_index);
                         break;
@@ -998,7 +1002,7 @@ int sd_event_source_set_io_events(sd_event_source *s, uint32_t events) {
                 return 0;
 
         if (s->enabled != SD_EVENT_OFF) {
-                r = source_io_register(s, s->io.events, events);
+                r = source_io_register(s, s->enabled, events);
                 if (r < 0)
                         return r;
         }
@@ -1380,8 +1384,20 @@ static int event_arm_timer(
         assert_se(next);
 
         a = prioq_peek(earliest);
-        if (!a || a->enabled == SD_EVENT_OFF)
+        if (!a || a->enabled == SD_EVENT_OFF) {
+
+                if (*next == (usec_t) -1)
+                        return 0;
+
+                /* disarm */
+                r = timerfd_settime(timer_fd, TFD_TIMER_ABSTIME, &its, NULL);
+                if (r < 0)
+                        return r;
+
+                *next = (usec_t) -1;
+
                 return 0;
+        }
 
         b = prioq_peek(latest);
         assert_se(b && b->enabled != SD_EVENT_OFF);
@@ -1426,12 +1442,14 @@ static int process_io(sd_event *e, sd_event_source *s, uint32_t events) {
         return source_set_pending(s, true);
 }
 
-static int flush_timer(sd_event *e, int fd, uint32_t events) {
+static int flush_timer(sd_event *e, int fd, uint32_t events, usec_t *next) {
         uint64_t x;
         ssize_t ss;
 
         assert(e);
         assert(fd >= 0);
+        assert(next);
+
         assert_return(events == EPOLLIN, -EIO);
 
         ss = read(fd, &x, sizeof(x));
@@ -1445,6 +1463,8 @@ static int flush_timer(sd_event *e, int fd, uint32_t events) {
         if (ss != sizeof(x))
                 return -EIO;
 
+        *next = (usec_t) -1;
+
         return 0;
 }
 
@@ -1526,15 +1546,17 @@ static int process_child(sd_event *e) {
 }
 
 static int process_signal(sd_event *e, uint32_t events) {
-        struct signalfd_siginfo si;
         bool read_one = false;
-        ssize_t ss;
         int r;
 
         assert(e);
+        assert(e->signal_sources);
+
         assert_return(events == EPOLLIN, -EIO);
 
         for (;;) {
+                struct signalfd_siginfo si;
+                ssize_t ss;
                 sd_event_source *s;
 
                 ss = read(e->signal_fd, &si, sizeof(si));
@@ -1550,17 +1572,16 @@ static int process_signal(sd_event *e, uint32_t events) {
 
                 read_one = true;
 
+                s = e->signal_sources[si.ssi_signo];
                 if (si.ssi_signo == SIGCHLD) {
                         r = process_child(e);
                         if (r < 0)
                                 return r;
-                        if (r > 0 || !e->signal_sources[si.ssi_signo])
+                        if (r > 0 || !s)
                                 continue;
-                } else {
-                        s = e->signal_sources[si.ssi_signo];
+                } else
                         if (!s)
                                 return -EIO;
-                }
 
                 s->signal.siginfo = si;
                 r = source_set_pending(s, true);
@@ -1573,7 +1594,7 @@ static int process_signal(sd_event *e, uint32_t events) {
 }
 
 static int source_dispatch(sd_event_source *s) {
-        int r;
+        int r = 0;
 
         assert(s);
         assert(s->pending || s->type == SOURCE_QUIT);
@@ -1727,7 +1748,7 @@ int sd_event_run(sd_event *e, uint64_t timeout) {
         m = epoll_wait(e->epoll_fd, ev_queue, EPOLL_QUEUE_MAX,
                        timeout == (uint64_t) -1 ? -1 : (int) ((timeout + USEC_PER_MSEC - 1) / USEC_PER_MSEC));
         if (m < 0) {
-                r = m;
+                r = errno == EAGAIN || errno == EINTR ? 0 : -errno;
                 goto finish;
         }
 
@@ -1736,9 +1757,9 @@ int sd_event_run(sd_event *e, uint64_t timeout) {
         for (i = 0; i < m; i++) {
 
                 if (ev_queue[i].data.ptr == INT_TO_PTR(SOURCE_MONOTONIC))
-                        r = flush_timer(e, e->monotonic_fd, ev_queue[i].events);
+                        r = flush_timer(e, e->monotonic_fd, ev_queue[i].events, &e->monotonic_next);
                 else if (ev_queue[i].data.ptr == INT_TO_PTR(SOURCE_REALTIME))
-                        r = flush_timer(e, e->realtime_fd, ev_queue[i].events);
+                        r = flush_timer(e, e->realtime_fd, ev_queue[i].events, &e->realtime_next);
                 else if (ev_queue[i].data.ptr == INT_TO_PTR(SOURCE_SIGNAL))
                         r = process_signal(e, ev_queue[i].events);
                 else