--close-on-exec option

utils.c

@@ -436,6 +436,10 @@ int wsgi_req_accept(struct wsgi_request *wsgi_req) {
                 		return -1;
 			}
 
+			if (uwsgi.close_on_exec) {
+				fcntl(wsgi_req->poll.fd, F_SETFD, FD_CLOEXEC);
+			}
+
 			return 0;
 		}
 	}

uwsgi.c

@@ -166,6 +166,7 @@ static struct option long_options[] = {
 		{"http-var", required_argument, 0, LONG_ARGS_HTTP_VAR},
 #endif
 		{"catch-exceptions", no_argument, &uwsgi.catch_exceptions, 1},
+		{"close-on-exec", no_argument, &uwsgi.close_on_exec, 1},
 		{"mode", required_argument, 0, LONG_ARGS_MODE},
 		{"env", required_argument, 0, LONG_ARGS_ENV},
 		{"vacuum", no_argument, &uwsgi.vacuum, 1},

uwsgi.h

@@ -805,6 +805,8 @@ struct uwsgi_server {
 #endif
 
 	struct wsgi_request* (*current_wsgi_req)(void);
+
+	int close_on_exec;
 };
 
 struct uwsgi_cluster_node {