1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*      Copyright (c) 1984 AT&T */
28/*        All Rights Reserved   */
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32/*LINTLIBRARY*/
33#include <stdio.h>
34#include <stdarg.h>
35
36extern int _doprnt();
37
38int
39vfprintf(FILE *iop, char *format, va_list ap)
40{
41	unsigned char localbuf[BUFSIZ];
42	int count;
43
44	if (!(iop->_flag & _IOWRT)) {
45		/* if no write flag */
46		if (iop->_flag & _IORW) {
47			/* if ok, cause read-write */
48			iop->_flag |= _IOWRT;
49		} else {
50			/* else error */
51			return (EOF);
52		}
53	}
54	if (iop->_flag & _IONBF) {
55		iop->_flag &= ~_IONBF;
56		iop->_ptr = iop->_base = localbuf;
57		iop->_bufsiz = BUFSIZ;
58		count = _doprnt(format, ap, iop);
59		fflush(iop);
60		iop->_flag |= _IONBF;
61		iop->_base = NULL;
62		iop->_bufsiz = 0;
63		iop->_cnt = 0;
64	} else {
65		count = _doprnt(format, ap, iop);
66	}
67	return (ferror(iop)? EOF: count);
68}
69