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 #include "lint.h"
31 #include <mtlib.h>
32 #include <stdarg.h>
33 #include <errno.h>
34 #include <thread.h>
35 #include <values.h>
36 #include <synch.h>
37 #include <sys/types.h>
38 #include "print.h"
39 #include "libc.h"
40 #include "mse.h"
41
42 /*
43 * 32-bit shadow function of vprintf() is included here.
44 * When using the c89 compiler to build 32-bit applications, the size
45 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
46 * The shadow function uses 32-bit size of intmax_t for %j conversion.
47 * The #pragma redefine_extname in <stdio.h> selects the proper routine
48 * at compile time for the user application.
49 * NOTE: the shadow function is only available in the 32-bit library.
50 */
51
52 /*VARARGS1*/
53
54 int
55 #ifdef _C89_INTMAX32
_vprintf_c89(const char * format,va_list ap)56 _vprintf_c89(const char *format, va_list ap)
57 #else
58 vprintf(const char *format, va_list ap)
59 #endif
60 {
61 ssize_t count;
62 rmutex_t *lk;
63
64 /* Use F*LOCKFILE() macros because vprintf() is not async-safe. */
65 FLOCKFILE(lk, stdout);
66
67 _SET_ORIENTATION_BYTE(stdout);
68
69 if (!(stdout->_flag & _IOWRT)) {
70 /* if no write flag */
71 if (stdout->_flag & _IORW) {
72 /* if ok, cause read-write */
73 stdout->_flag |= _IOWRT;
74 } else {
75 /* else error */
76 FUNLOCKFILE(lk);
77 errno = EBADF;
78 return (EOF);
79 }
80 }
81 #ifdef _C89_INTMAX32
82 count = _ndoprnt(format, ap, stdout, _F_INTMAX32);
83 #else
84 count = _ndoprnt(format, ap, stdout, 0);
85 #endif
86 /* check for error or EOF */
87 if (FERROR(stdout) || count == EOF) {
88 FUNLOCKFILE(lk);
89 return (EOF);
90 }
91
92 FUNLOCKFILE(lk);
93
94 /* check for overflow */
95 if ((size_t)count > MAXINT) {
96 errno = EOVERFLOW;
97 return (EOF);
98 } else {
99 return ((int)count);
100 }
101 }
102