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 2006 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #pragma ident "%Z%%M% %I% %E% SMI" 41 42 /*LINTLIBRARY*/ 43 44 #include <sys/types.h> 45 #include "file64.h" 46 #include <stdio.h> 47 #include <fcntl.h> 48 #include <unistd.h> 49 #include <sys/file.h> 50 #include "stdiom.h" 51 52 /* Final argument to _endopen depends on build environment */ 53 #define ALWAYS_LARGE_OPEN 1 54 #define LARGE_OPEN (_FILE_OFFSET_BITS == 64) 55 56 static FILE * 57 _endopen(const char *file, const char *mode, FILE *iop, int largefile) 58 { 59 int plus, oflag, fd; 60 61 if (iop == NULL || file == NULL || file[0] == '\0') 62 return (NULL); 63 plus = (mode[1] == '+'); 64 switch (mode[0]) { 65 case 'w': 66 oflag = (plus ? O_RDWR : O_WRONLY) | O_TRUNC | O_CREAT; 67 break; 68 case 'a': 69 oflag = (plus ? O_RDWR : O_WRONLY) | O_CREAT; 70 break; 71 case 'r': 72 oflag = plus ? O_RDWR : O_RDONLY; 73 break; 74 default: 75 return (NULL); 76 } 77 78 if (largefile) { 79 fd = open64(file, oflag, 0666); /* mapped to open() for V9 */ 80 } else { 81 fd = open(file, oflag, 0666); 82 } 83 if (fd < 0) 84 return (NULL); 85 iop->_cnt = 0; 86 #ifdef _LP64 87 iop->_file = fd; 88 #else 89 if (fd <= _FILE_FD_MAX) { 90 SET_FILE(iop, fd); 91 } else if (_file_set(iop, fd, mode) != 0) { 92 /* errno set in _file_set() */ 93 (void) close(fd); 94 return (NULL); 95 } 96 #endif 97 iop->_flag = plus ? _IORW : (mode[0] == 'r') ? _IOREAD : _IOWRT; 98 if (mode[0] == 'a') { 99 if ((lseek64(fd, 0L, SEEK_END)) < 0) { 100 (void) close(fd); 101 return (NULL); 102 } 103 } 104 iop->_base = iop->_ptr = NULL; 105 /* 106 * Sys5 does not support _bufsiz 107 * 108 * iop->_bufsiz = 0; 109 */ 110 return (iop); 111 } 112 113 FILE * 114 fopen(const char *file, const char *mode) 115 { 116 FILE *iop; 117 FILE *rc; 118 119 iop = _findiop(); 120 rc = _endopen(file, mode, iop, LARGE_OPEN); 121 if (rc == NULL && iop != NULL) 122 iop->_flag = 0; /* release iop */ 123 return (rc); 124 } 125 126 /* 127 * For _LP64, all fopen() calls are 64-bit calls, i.e., open64() system call. 128 * There should not be fopen64() calls. 129 * Similar for freopen64(). 130 */ 131 #if !defined(_LP64) 132 FILE * 133 fopen64(const char *file, const char *mode) 134 { 135 FILE *iop; 136 FILE *rc; 137 138 iop = _findiop(); 139 rc = _endopen(file, mode, iop, ALWAYS_LARGE_OPEN); 140 if (rc == NULL && iop != NULL) 141 iop->_flag = 0; /* release iop */ 142 return (rc); 143 } 144 #endif 145 146 FILE * 147 freopen(const char *file, const char *mode, FILE *iop) 148 { 149 (void) fclose(iop); /* doesn't matter if this fails */ 150 return (_endopen(file, mode, iop, LARGE_OPEN)); 151 } 152 153 #if !defined(_LP64) 154 FILE * 155 freopen64(const char *file, const char *mode, FILE *iop) 156 { 157 (void) fclose(iop); /* doesn't matter if this fails */ 158 return (_endopen(file, mode, iop, ALWAYS_LARGE_OPEN)); 159 } 160 #endif 161