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 /*
33 * This symbol should not be defined, but there are some
34 * miserable old compiler libraries that depend on it.
35 */
36 #pragma weak _fprintf = fprintf
37
38 #include "lint.h"
39 #include <mtlib.h>
40 #include <thread.h>
41 #include <synch.h>
42 #include <stdarg.h>
43 #include <values.h>
44 #include <errno.h>
45 #include "print.h"
46 #include <sys/types.h>
47 #include "libc.h"
48 #include "mse.h"
49
50 /*VARARGS2*/
51 int
fprintf(FILE * iop,const char * format,...)52 fprintf(FILE *iop, const char *format, ...)
53 {
54 ssize_t count;
55 rmutex_t *lk;
56 va_list ap;
57
58 va_start(ap, format);
59
60 /* Use F*LOCKFILE() macros because fprintf() is not async-safe. */
61 FLOCKFILE(lk, iop);
62
63 _SET_ORIENTATION_BYTE(iop);
64
65 if (!(iop->_flag & _IOWRT)) {
66 /* if no write flag */
67 if (iop->_flag & _IORW) {
68 /* if ok, cause read-write */
69 iop->_flag |= _IOWRT;
70 } else {
71 /* else error */
72 FUNLOCKFILE(lk);
73 errno = EBADF;
74 return (EOF);
75 }
76 }
77 count = _ndoprnt(format, ap, iop, 0);
78
79 /* return EOF on error or EOF */
80 if (FERROR(iop) || count == EOF) {
81 FUNLOCKFILE(lk);
82 return (EOF);
83 }
84
85 FUNLOCKFILE(lk);
86
87 /* error on overflow */
88 if ((size_t)count > MAXINT) {
89 errno = EOVERFLOW;
90 return (EOF);
91 }
92 return ((int)count);
93 }
94
95 #ifndef _LP64
96
97 /*
98 * 32-bit shadow function of fprintf().
99 * When using the c89 compiler to build 32-bit applications, the size
100 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
101 * The shadow function uses 32-bit size of intmax_t for %j conversion.
102 * The #pragma redefine_extname in <stdio.h> selects the proper routine
103 * at compile time for the user application.
104 * NOTE: this function only exists in the 32-bit library.
105 */
106
107 int
_fprintf_c89(FILE * iop,const char * format,...)108 _fprintf_c89(FILE *iop, const char *format, ...)
109 {
110 ssize_t count;
111 va_list ap;
112
113 va_start(ap, format);
114 count = _vfprintf_c89(iop, format, ap);
115 va_end(ap);
116 return ((int)count);
117 }
118
119 #endif /* _LP64 */
120