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 */ 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 */ 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 */ 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