$NetBSD: patch-ab,v 1.3 2012/12/26 21:55:37 dholland Exp $

Looking inside FILE is gross, but if we're going to do it at least do
it ~correctly.

--- src/hd/rhdisp.c.orig	2004-04-10 02:54:06.000000000 +0000
+++ src/hd/rhdisp.c
@@ -22,9 +22,11 @@ static const char	RCSid[] = "$Id: rhdisp
 #define FSIZDEF		0.125	/* default focus frame size */
 #endif
 
-#if defined(freebsd)
+#if defined(freebsd) || defined(netbsd)
 #define fbufcnt(f)	((f)->_r)
-#elif defined(__GNUC__)
+#elif defined(dragonfly)
+#define fbufcnt(f)	(((struct __FILE_public *)(f))->_r)
+#elif defined(__linux__) || defined(__GNU_LIBRARY__)
 #define fbufcnt(f)	((f)->_IO_read_end - (f)->_IO_read_ptr)
 #else
 #define fbufcnt(f)	((f)->_cnt)