net.server_epoll: Special handling of signal interrupts

net/server_epoll.lua

@@ -742,7 +742,7 @@ local function loop(once)
 				log("debug", "Removing unknown fd %d", fd);
 				poll:del(fd);
 			end
-		elseif r ~= "timeout" then
+		elseif r ~= "timeout" and r ~= "signal" then
 			log("debug", "epoll_wait error: %s[%d]", r, w);
 		end
 	until once or (quitting and next(fds) == nil);

util-src/poll.c

@@ -316,6 +316,11 @@ int Lwait(lua_State *L) {
 		lua_pushstring(L, "timeout");
 		return 2;
 	}
+	else if(ret < 0 && errno == EINTR) {
+		lua_pushnil(L);
+		lua_pushstring(L, "signal");
+		return 2;
+	}
 	else if(ret < 0) {
 		ret = errno;
 		lua_pushnil(L);