server: Add infrastructure for ioctl server request.
diff --git a/server/process.c b/server/process.c
index 2e9fd59..fffae51 100644
--- a/server/process.c
+++ b/server/process.c
@@ -86,6 +86,7 @@
     process_poll_event,          /* poll_event */
     NULL,                        /* flush */
     NULL,                        /* get_fd_type */
+    NULL,                        /* ioctl */
     NULL,                        /* queue_async */
     NULL,                        /* reselect_async */
     NULL                         /* cancel async */