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 (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#pragma ident	"%Z%%M%	%I%	%E% SMI"
31
32#include "lint.h"
33#include <mtlib.h>
34#include <stdarg.h>
35#include <errno.h>
36#include <thread.h>
37#include <values.h>
38#include <synch.h>
39#include <sys/types.h>
40#include "print.h"
41#include "libc.h"
42#include "mse.h"
43
44/*
45 * 32-bit shadow function of vprintf() is included here.
46 * When using the c89 compiler to build 32-bit applications, the size
47 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
48 * The shadow function uses 32-bit size of intmax_t for %j conversion.
49 * The #pragma redefine_extname in <stdio.h> selects the proper routine
50 * at compile time for the user application.
51 * NOTE: the shadow function is only available in the 32-bit library.
52 */
53
54/*VARARGS1*/
55
56int
57#ifdef _C89_INTMAX32
58_vprintf_c89(const char *format, va_list ap)
59#else
60vprintf(const char *format, va_list ap)
61#endif
62{
63	ssize_t count;
64	rmutex_t *lk;
65
66	/* Use F*LOCKFILE() macros because vprintf() is not async-safe. */
67	FLOCKFILE(lk, stdout);
68
69	_SET_ORIENTATION_BYTE(stdout);
70
71	if (!(stdout->_flag & _IOWRT)) {
72		/* if no write flag */
73		if (stdout->_flag & _IORW) {
74			/* if ok, cause read-write */
75			stdout->_flag |= _IOWRT;
76		} else {
77			/* else error */
78			FUNLOCKFILE(lk);
79			errno = EBADF;
80			return (EOF);
81		}
82	}
83#ifdef _C89_INTMAX32
84	count = _ndoprnt(format, ap, stdout, _F_INTMAX32);
85#else
86	count = _ndoprnt(format, ap, stdout, 0);
87#endif
88	/* check for error or EOF */
89	if (FERROR(stdout) || count == EOF) {
90		FUNLOCKFILE(lk);
91		return (EOF);
92	}
93
94	FUNLOCKFILE(lk);
95
96	/* check for overflow */
97	if ((size_t)count > MAXINT) {
98		errno = EOVERFLOW;
99		return (EOF);
100	} else {
101		return ((int)count);
102	}
103}
104