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 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 
31 #pragma ident	"%Z%%M%	%I%	%E% SMI"
32 
33 /*LINTLIBRARY*/
34 
35 #include <sys/types.h>
36 #include "file64.h"
37 #include <stdio.h>
38 #include <stdarg.h>
39 #include "libc.h"
40 
41 int
printf(const char * format,...)42 printf(const char *format, ...)
43 {
44 	int count;
45 	va_list ap;
46 
47 	va_start(ap, format);
48 	if (!(stdout->_flag & _IOWRT)) {
49 		/* if no write flag */
50 		if (stdout->_flag & _IORW) {
51 			/* if ok, cause read-write */
52 			stdout->_flag |= _IOWRT;
53 		} else {
54 			/* else error */
55 			return (EOF);
56 		}
57 	}
58 	count = _doprnt((char *) format, ap, stdout);
59 	va_end(ap);
60 	return (count);
61 }
62