From 1b629e865eaaad178e515a7bf0fbf73b847cc6d6 Mon Sep 17 00:00:00 2001
From: "Jordan K. Hubbard" <jkh@FreeBSD.org>
Date: Tue, 2 Mar 2004 19:43:51 +0000
Subject: [PATCH] If handed a file pointer we can't write to, set errno
 properly to EBADF in order to get SUSv2 conformant behavior in higher level
 calls like fputs() and puts().

Reviewed by:	bde
---
 lib/libc/stdio/fvwrite.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/libc/stdio/fvwrite.c b/lib/libc/stdio/fvwrite.c
index 192edf81c90..cacad7f96d6 100644
--- a/lib/libc/stdio/fvwrite.c
+++ b/lib/libc/stdio/fvwrite.c
@@ -40,6 +40,7 @@ static char sccsid[] = "@(#)fvwrite.c	8.1 (Berkeley) 6/4/93";
 #include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -67,8 +68,10 @@ __sfvwrite(fp, uio)
 	if ((len = uio->uio_resid) == 0)
 		return (0);
 	/* make sure we can write */
-	if (cantwrite(fp))
+	if (cantwrite(fp)) {
+		errno = EBADF;
 		return (EOF);
+	}
 
 #define	MIN(a, b) ((a) < (b) ? (a) : (b))
 #define	COPY(n)	  (void)memcpy((void *)fp->_p, (void *)p, (size_t)(n))