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
36 extern int _doprnt();
37
38 int
vfprintf(FILE * iop,char * format,va_list ap)39 vfprintf(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