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
56 int
57 #ifdef _C89_INTMAX32
_vprintf_c89(const char * format,va_list ap)58 _vprintf_c89(const char *format, va_list ap)
59 #else
60 vprintf(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