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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * This routine is a special case, in that it is aware of 35 * both small and large file interfaces. It must be built 36 * in the small compilation environment. 37 */ 38 39 #include <sys/feature_tests.h> 40 41 #define close _close 42 #define lseek _lseek 43 #define open _open 44 #if !defined(_LP64) 45 #define lseek64 _lseek64 46 #define open64 _open64 47 #endif 48 49 #include "lint.h" 50 #include "file64.h" 51 #include <mtlib.h> 52 #include <sys/types.h> 53 #include <stdio.h> 54 #include <fcntl.h> 55 #include <unistd.h> 56 #include <limits.h> 57 #include <thread.h> 58 #include <synch.h> 59 #include "stdiom.h" 60 #include <errno.h> 61 62 /* 63 * open UNIX file name, associate with iop 64 */ 65 66 FILE * 67 _endopen(const char *name, const char *type, FILE *iop, int largefile) 68 { 69 int oflag, fd; 70 char plus; 71 rmutex_t *lk; 72 73 if (iop == NULL) 74 return (NULL); 75 switch (type[0]) { 76 default: 77 errno = EINVAL; 78 return (NULL); 79 case 'r': 80 oflag = O_RDONLY; 81 break; 82 case 'w': 83 oflag = O_WRONLY | O_TRUNC | O_CREAT; 84 break; 85 case 'a': 86 oflag = O_WRONLY | O_APPEND | O_CREAT; 87 break; 88 } 89 /* UNIX ignores 'b' and treats text and binary the same */ 90 if ((plus = type[1]) == 'b') 91 plus = type[2]; 92 if (plus == '+') 93 oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR; 94 95 /* select small or large file open based on flag */ 96 if (largefile) { 97 fd = open64(name, oflag, 0666); 98 } else { 99 fd = open(name, oflag, 0666); 100 } 101 if (fd < 0) 102 return (NULL); 103 104 #ifdef _LP64 105 iop->_file = fd; 106 #else 107 if (fd > UCHAR_MAX) { 108 (void) close(fd); 109 errno = EMFILE; 110 return (NULL); 111 } 112 iop->_file = (unsigned char)fd; /* assume fits in unsigned char */ 113 #endif /* _LP64 */ 114 115 FLOCKFILE(lk, iop); /* this lock may be unnecessary */ 116 117 #ifdef _LP64 118 iop->_flag &= ~0377; /* clear lower 8-bits */ 119 if (plus == '+') 120 iop->_flag |= _IORW; 121 else if (type[0] == 'r') 122 iop->_flag |= _IOREAD; 123 else 124 iop->_flag |= _IOWRT; 125 #else 126 if (plus == '+') 127 iop->_flag = _IORW; 128 else if (type[0] == 'r') 129 iop->_flag = _IOREAD; 130 else 131 iop->_flag = _IOWRT; 132 #endif /* _LP64 */ 133 FUNLOCKFILE(lk); 134 if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) { /* type == "a" */ 135 if (lseek64(fd, (off64_t)0, SEEK_END) < (off64_t)0) { 136 (void) close(fd); 137 return (NULL); 138 } 139 } 140 141 return (iop); 142 } 143