select: epoll.register(): Handle case of fd have been already registered.

pfalcon · pfalcon · commit 52ac4308f7e8 · 2014-04-20T06:20:57.000+03:00
Is this correct enough? Certainly, Python's epoll should not be fire-once?
diff --git a/select/select.py b/select/select.py
@@ -37,6 +37,8 @@ def register(self, fd, eventmask=EPOLLIN|EPOLLPRI|EPOLLOUT, retval=None):
             retval = fd
         s = struct.pack(self.epoll_event, eventmask, retval)
         r = epoll_ctl(self.epfd, EPOLL_CTL_ADD, fd, s)
+        if r == -1 and os.errno.get() == 17:
+            r = epoll_ctl(self.epfd, EPOLL_CTL_MOD, fd, s)
         os.check_error(r)
 
     def poll(self, timeout=-1):
