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 #ifndef _C89_INTMAX32
31 #pragma weak _vscanf = vscanf
32 #pragma weak _vfscanf = vfscanf
33 #pragma weak _vsscanf = vsscanf
34 #endif
35
36 #include "lint.h"
37 #include "file64.h"
38 #include "mtlib.h"
39 #include <stdio.h>
40 #include <stdarg.h>
41 #include <string.h>
42 #include <thread.h>
43 #include <synch.h>
44 #include "libc.h"
45 #include "stdiom.h"
46 #include "mse.h"
47 #include <stdio_ext.h>
48
49
50 /*
51 * 32-bit shadow functions _vscanf_c89(), _vfscanf_c89(), _vsscanf_c89()
52 * are included here.
53 * When using the c89 compiler to build 32-bit applications, the size
54 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits.
55 * The shadow function uses 32-bit size of intmax_t for %j conversion.
56 * The #pragma redefine_extname in <stdio.h> selects the proper routine
57 * at compile time for the user application.
58 * NOTE: the shadow function only exists in the 32-bit library.
59 */
60
61 int
62 #ifdef _C89_INTMAX32 /* _C89_INTMAX32 version in 32-bit libc only */
_vscanf_c89(const char * fmt,va_list ap)63 _vscanf_c89(const char *fmt, va_list ap)
64 #else
65 vscanf(const char *fmt, va_list ap)
66 #endif
67 {
68 rmutex_t *lk;
69 int ret;
70
71 FLOCKFILE(lk, stdin);
72
73 _SET_ORIENTATION_BYTE(stdin);
74
75 #ifdef _C89_INTMAX32
76 ret = __doscan_u(stdin, fmt, ap, _F_INTMAX32);
77 #else
78 ret = __doscan_u(stdin, fmt, ap, 0);
79 #endif
80
81 FUNLOCKFILE(lk);
82 return (ret);
83 }
84
85 int
86 #ifdef _C89_INTMAX32 /* _C89_INTMAX32 version in 32-bit libc only */
_vfscanf_c89(FILE * iop,const char * fmt,va_list ap)87 _vfscanf_c89(FILE *iop, const char *fmt, va_list ap)
88 #else
89 vfscanf(FILE *iop, const char *fmt, va_list ap)
90 #endif
91 {
92 rmutex_t *lk;
93 int ret;
94
95 FLOCKFILE(lk, iop);
96
97 _SET_ORIENTATION_BYTE(iop);
98
99 #ifdef _C89_INTMAX32
100 ret = __doscan_u(iop, fmt, ap, _F_INTMAX32);
101 #else
102 ret = __doscan_u(iop, fmt, ap, 0);
103 #endif
104 FUNLOCKFILE(lk);
105 return (ret);
106 }
107
108 int
109 #ifdef _C89_INTMAX32 /* _C89_INTMAX32 version in 32-bit libc only */
_vsscanf_c89(const char * str,const char * fmt,va_list ap)110 _vsscanf_c89(const char *str, const char *fmt, va_list ap)
111 #else
112 vsscanf(const char *str, const char *fmt, va_list ap)
113 #endif
114 {
115 FILE strbuf;
116
117 /*
118 * The dummy FILE * created for sscanf has the _IOWRT
119 * flag set to distinguish it from scanf and fscanf
120 * invocations.
121 */
122 strbuf._flag = _IOREAD | _IOWRT;
123 strbuf._ptr = strbuf._base = (unsigned char *)str;
124 strbuf._cnt = strlen(str);
125 SET_FILE(&strbuf, _NFILE);
126
127 /*
128 * Mark the stream so that routines called by __doscan_u()
129 * do not do any locking. In particular this avoids a NULL
130 * lock pointer being used by getc() causing a core dump.
131 * See bugid - 1210179 program SEGV's in sscanf if linked with
132 * the libthread.
133 * This also makes sscanf() quicker since it does not need
134 * to do any locking.
135 */
136 if (__fsetlocking(&strbuf, FSETLOCKING_BYCALLER) == -1) {
137 return (-1); /* this should never happen */
138 }
139
140 /* as this stream is local to this function, no locking is be done */
141 #ifdef _C89_INTMAX32
142 return (__doscan_u(&strbuf, fmt, ap, _F_INTMAX32));
143 #else
144 return (__doscan_u(&strbuf, fmt, ap, 0));
145 #endif
146 }
147