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 <thread.h>
34#include <mtlib.h>
35#include <synch.h>
36#include <stdarg.h>
37#include <values.h>
38#include <errno.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 vfprintf() 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: this function is only available in the 32-bit library.
52 */
53
54/*VARARGS2*/
55int
56#ifdef _C89_INTMAX32	/* _C89_INTMAX32 version in 32-bit libc only */
57_vfprintf_c89(FILE *iop, const char *format, va_list ap)
58#else
59vfprintf(FILE *iop, const char *format, va_list ap)
60#endif
61{
62	ssize_t count;
63	rmutex_t *lk;
64
65	/* Use F*LOCKFILE() macros because vfprintf() is not async-safe. */
66	FLOCKFILE(lk, iop);
67
68	_SET_ORIENTATION_BYTE(iop);
69
70	if (!(iop->_flag & _IOWRT)) {
71		/* if no write flag */
72		if (iop->_flag & _IORW) {
73			/* if ok, cause read-write */
74			iop->_flag |= _IOWRT;
75		} else {
76			/* else error */
77			FUNLOCKFILE(lk);
78			errno = EBADF;
79			return (EOF);
80		}
81	}
82#ifdef _C89_INTMAX32
83	count = _ndoprnt(format, ap, iop, _F_INTMAX32);
84#else
85	count = _ndoprnt(format, ap, iop, 0);
86#endif
87
88	/* check for error or EOF */
89	if (FERROR(iop) || 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