--- a/fuzz-wrapfd.h	Fri May 19 00:48:46 2017 +0800
+++ b/fuzz-wrapfd.h	Sat May 20 13:23:16 2017 +0800
@@ -14,4 +14,10 @@
 // doesn't take ownership of buf. buf is optional.
 void wrapfd_add(int fd, buffer *buf, enum wrapfd_mode mode);
 
+// called via #defines for read/write/select
+int wrapfd_read(int fd, void *out, size_t count);
+int wrapfd_write(int fd, const void* in, size_t count);
+int wrapfd_select(int nfds, fd_set *readfds, fd_set *writefds, 
+    fd_set *exceptfds, struct timeval *timeout);
+
 #endif // FUZZ_WRAPFD_H