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