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 #ifndef _C89_INTMAX32 33 #pragma weak _vscanf = vscanf 34 #pragma weak _vfscanf = vfscanf 35 #pragma weak _vsscanf = vsscanf 36 #endif 37 38 #include "lint.h" 39 #include "file64.h" 40 #include "mtlib.h" 41 #include <stdio.h> 42 #include <stdarg.h> 43 #include <string.h> 44 #include <thread.h> 45 #include <synch.h> 46 #include "libc.h" 47 #include "stdiom.h" 48 #include "mse.h" 49 #include <stdio_ext.h> 50 51 52 /* 53 * 32-bit shadow functions _vscanf_c89(), _vfscanf_c89(), _vsscanf_c89() 54 * are included here. 55 * When using the c89 compiler to build 32-bit applications, the size 56 * of intmax_t is 32-bits, otherwise the size of intmax_t is 64-bits. 57 * The shadow function uses 32-bit size of intmax_t for %j conversion. 58 * The #pragma redefine_extname in <stdio.h> selects the proper routine 59 * at compile time for the user application. 60 * NOTE: the shadow function only exists in the 32-bit library. 61 */ 62 63 int 64 #ifdef _C89_INTMAX32 /* _C89_INTMAX32 version in 32-bit libc only */ 65 _vscanf_c89(const char *fmt, va_list ap) 66 #else 67 vscanf(const char *fmt, va_list ap) 68 #endif 69 { 70 rmutex_t *lk; 71 int ret; 72 73 FLOCKFILE(lk, stdin); 74 75 _SET_ORIENTATION_BYTE(stdin); 76 77 #ifdef _C89_INTMAX32 78 ret = __doscan_u(stdin, fmt, ap, _F_INTMAX32); 79 #else 80 ret = __doscan_u(stdin, fmt, ap, 0); 81 #endif 82 83 FUNLOCKFILE(lk); 84 return (ret); 85 } 86 87 int 88 #ifdef _C89_INTMAX32 /* _C89_INTMAX32 version in 32-bit libc only */ 89 _vfscanf_c89(FILE *iop, const char *fmt, va_list ap) 90 #else 91 vfscanf(FILE *iop, const char *fmt, va_list ap) 92 #endif 93 { 94 rmutex_t *lk; 95 int ret; 96 97 FLOCKFILE(lk, iop); 98 99 _SET_ORIENTATION_BYTE(iop); 100 101 #ifdef _C89_INTMAX32 102 ret = __doscan_u(iop, fmt, ap, _F_INTMAX32); 103 #else 104 ret = __doscan_u(iop, fmt, ap, 0); 105 #endif 106 FUNLOCKFILE(lk); 107 return (ret); 108 } 109 110 int 111 #ifdef _C89_INTMAX32 /* _C89_INTMAX32 version in 32-bit libc only */ 112 _vsscanf_c89(const char *str, const char *fmt, va_list ap) 113 #else 114 vsscanf(const char *str, const char *fmt, va_list ap) 115 #endif 116 { 117 FILE strbuf; 118 119 /* 120 * The dummy FILE * created for sscanf has the _IOWRT 121 * flag set to distinguish it from scanf and fscanf 122 * invocations. 123 */ 124 strbuf._flag = _IOREAD | _IOWRT; 125 strbuf._ptr = strbuf._base = (unsigned char *)str; 126 strbuf._cnt = strlen(str); 127 SET_FILE(&strbuf, _NFILE); 128 129 /* 130 * Mark the stream so that routines called by __doscan_u() 131 * do not do any locking. In particular this avoids a NULL 132 * lock pointer being used by getc() causing a core dump. 133 * See bugid - 1210179 program SEGV's in sscanf if linked with 134 * the libthread. 135 * This also makes sscanf() quicker since it does not need 136 * to do any locking. 137 */ 138 if (__fsetlocking(&strbuf, FSETLOCKING_BYCALLER) == -1) { 139 return (-1); /* this should never happen */ 140 } 141 142 /* as this stream is local to this function, no locking is be done */ 143 #ifdef _C89_INTMAX32 144 return (__doscan_u(&strbuf, fmt, ap, _F_INTMAX32)); 145 #else 146 return (__doscan_u(&strbuf, fmt, ap, 0)); 147 #endif 148 } 149