Fix EV_CLOSED detection/reporting (epoll only)

- EV_CLOSED is EPOLLRDHUP in epoll
- EPOLLRDHUP reported w/o EPOLLHUP if the socket closed with shutdown(SHUT_WR)
- EPOLLRDHUP reported w/  EPOLLHUP if the socket closed with close()
  so in this case epoll backend will detect this event as error
  (EV_READ|EV_WRITE), since the epoll_ctl() will return EPOLLRDHUP with
  EPOLLHUP set, but this is not correct, let's fix this.

Fixes: #984

1 files changed, 3 insertions, 1 deletions

diff --git a/epoll.c b/epoll.c
index 299e3d35..4b1e3963 100644
--- a/epoll.c
+++ b/epoll.c
@@ -487,7 +487,9 @@ epoll_dispatch(struct event_base *base, struct timeval *tv)
 			continue;
 #endif
 
-		if (what & (EPOLLHUP|EPOLLERR)) {
+		if (what & EPOLLERR) {
+			ev = EV_READ | EV_WRITE;
+		} else if ((what & EPOLLHUP) && !(what & EPOLLRDHUP)) {
 			ev = EV_READ | EV_WRITE;
 		} else {
 			if (what & EPOLLIN)