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 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* Copyright (c) 1988 AT&T */ 29 /* All Rights Reserved */ 30 31 32 /* 33 * This routine is a special case, in that it is aware of 34 * both small and large file interfaces. It must be built 35 * in the small compilation environment. 36 */ 37 38 #include <sys/feature_tests.h> 39 40 #define close _close 41 #define lseek _lseek 42 #define open _open 43 #if !defined(_LP64) 44 #define lseek64 _lseek64 45 #define open64 _open64 46 #endif 47 48 #include "lint.h" 49 #include "file64.h" 50 #include <mtlib.h> 51 #include <sys/types.h> 52 #include <stdio.h> 53 #include <fcntl.h> 54 #include <unistd.h> 55 #include <limits.h> 56 #include <thread.h> 57 #include <synch.h> 58 #include "stdiom.h" 59 #include <errno.h> 60 61 /* 62 * open UNIX file name, associate with iop 63 */ 64 65 FILE * 66 _endopen(const char *name, const char *type, FILE *iop, int largefile) 67 { 68 int oflag, fd, fflag; 69 char plus; 70 71 if (iop == NULL) 72 return (NULL); 73 switch (type[0]) { 74 default: 75 errno = EINVAL; 76 return (NULL); 77 case 'r': 78 oflag = O_RDONLY; 79 fflag = _IOREAD; 80 break; 81 case 'w': 82 oflag = O_WRONLY | O_TRUNC | O_CREAT; 83 fflag = _IOWRT; 84 break; 85 case 'a': 86 oflag = O_WRONLY | O_APPEND | O_CREAT; 87 fflag = _IOWRT; 88 break; 89 } 90 /* UNIX ignores 'b' and treats text and binary the same */ 91 if ((plus = type[1]) == 'b') 92 plus = type[2]; 93 if (plus == '+') { 94 oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR; 95 fflag = _IORW; 96 } 97 98 /* select small or large file open based on flag */ 99 if (largefile) { 100 fd = open64(name, oflag, 0666); 101 } else { 102 fd = open(name, oflag, 0666); 103 } 104 if (fd < 0) 105 return (NULL); 106 107 /* As long as we make sure _flag stays != 0, we don't need to lock */ 108 #ifdef _LP64 109 iop->_file = fd; 110 iop->_flag = (iop->_flag & ~0377) | fflag; 111 #else 112 if (fd <= _FILE_FD_MAX) { 113 SET_FILE(iop, fd); 114 } else if (_file_set(iop, fd, type) != 0) { 115 /* errno set in _file_set() */ 116 (void) close(fd); 117 return (NULL); 118 } 119 iop->_flag = fflag; 120 #endif /* _LP64 */ 121 122 if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) { /* type == "a" */ 123 if (lseek64(fd, (off64_t)0, SEEK_END) < (off64_t)0) { 124 (void) close(fd); 125 return (NULL); 126 } 127 } 128 129 return (iop); 130 } 131