xref: /titanic_52/usr/src/lib/libbc/libc/stdio/sys5/printf.c (revision d14abf155341d55053c76eeec58b787a456b753b)
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
39 printf(char *format, ...)
40 {
41 	int count;
42 	va_list ap;
43 
44 	if (!(stdout->_flag & _IOWRT)) {
45 		/* if no write flag */
46 		if (stdout->_flag & _IORW) {
47 			/* if ok, cause read-write */
48 			stdout->_flag |= _IOWRT;
49 		} else {
50 			/* else error */
51 			return (EOF);
52 		}
53 	}
54 	va_start(ap, format);
55 	count = _doprnt(format, ap, stdout);
56 	va_end(ap);
57 	return (ferror(stdout)? EOF: count);
58 }
59