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 /* Copyright (c) 2013 OmniTI Computer Consulting, Inc. All rights reserved. */ 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 "lint.h" 39 #include "file64.h" 40 #include <mtlib.h> 41 #include <sys/types.h> 42 #include <stdio.h> 43 #include <fcntl.h> 44 #include <unistd.h> 45 #include <limits.h> 46 #include <thread.h> 47 #include <synch.h> 48 #include "stdiom.h" 49 #include <errno.h> 50 51 /* 52 * open UNIX file name, associate with iop 53 */ 54 55 FILE * 56 _endopen(const char *name, const char *type, FILE *iop, int largefile) 57 { 58 int oflag, fd, fflag, eflag, plusflag, xflag; 59 const char *echr; 60 61 if (iop == NULL) 62 return (NULL); 63 switch (type[0]) { 64 default: 65 errno = EINVAL; 66 return (NULL); 67 case 'r': 68 oflag = O_RDONLY; 69 fflag = _IOREAD; 70 break; 71 case 'w': 72 oflag = O_WRONLY | O_TRUNC | O_CREAT; 73 fflag = _IOWRT; 74 break; 75 case 'a': 76 oflag = O_WRONLY | O_APPEND | O_CREAT; 77 fflag = _IOWRT; 78 break; 79 } 80 81 plusflag = 0; 82 eflag = 0; 83 xflag = 0; 84 for (echr = type + 1; *echr != '\0'; echr++) { 85 switch (*echr) { 86 /* UNIX ignores 'b' and treats text and binary the same */ 87 default: 88 break; 89 case '+': 90 plusflag = 1; 91 break; 92 case 'e': 93 eflag = 1; 94 break; 95 case 'x': 96 xflag = 1; 97 break; 98 } 99 } 100 if (eflag) { 101 /* Subsequent to a mode flag, 'e' indicates O_CLOEXEC */ 102 oflag = oflag | O_CLOEXEC; 103 } 104 if (plusflag) { 105 oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR; 106 fflag = _IORW; 107 } 108 if (xflag) { 109 oflag |= O_EXCL; 110 } 111 112 /* select small or large file open based on flag */ 113 if (largefile) { 114 fd = open64(name, oflag, 0666); 115 } else { 116 fd = open(name, oflag, 0666); 117 } 118 if (fd < 0) 119 return (NULL); 120 121 /* As long as we make sure _flag stays != 0, we don't need to lock */ 122 #ifdef _LP64 123 iop->_file = fd; 124 iop->_flag = (iop->_flag & ~0377) | fflag; 125 #else 126 if (fd <= _FILE_FD_MAX) { 127 SET_FILE(iop, fd); 128 } else if (_file_set(iop, fd, type) != 0) { 129 /* errno set in _file_set() */ 130 (void) close(fd); 131 return (NULL); 132 } 133 iop->_flag = fflag; 134 #endif /* _LP64 */ 135 136 if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) { /* type == "a" */ 137 if (lseek64(fd, (off64_t)0, SEEK_END) < (off64_t)0) { 138 (void) close(fd); 139 return (NULL); 140 } 141 } 142 143 return (iop); 144 } 145