wbuf.c.patch   [plain text]

--- wbuf.c.orig	Mon Mar 22 13:35:00 2004
+++ wbuf.c	Mon Mar 22 13:38:02 2004
@@ -41,6 +41,7 @@
 __FBSDID("$FreeBSD: src/lib/libc/stdio/wbuf.c,v 1.10 2002/08/13 09:30:41 tjr Exp $");
 
 #include <stdio.h>
+#include <errno.h>
 #include "local.h"
 
 /*
@@ -65,8 +66,10 @@
 	 * calls might wrap _w from negative to positive.
 	 */
 	fp->_w = fp->_lbfsize;
-	if (cantwrite(fp))
+	if (cantwrite(fp)) {
+		errno = EBADF;
 		return (EOF);
+	}
 	c = (unsigned char)c;
 
 	ORIENT(fp, -1);