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; 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 for (echr = type + 1; *echr != '\0'; echr++) { 84 switch (*echr) { 85 /* UNIX ignores 'b' and treats text and binary the same */ 86 default: 87 break; 88 case '+': 89 plusflag = 1; 90 break; 91 case 'e': 92 eflag = 1; 93 break; 94 } 95 } 96 if (eflag) { 97 /* Subsequent to a mode flag, 'e' indicates O_CLOEXEC */ 98 oflag = oflag | O_CLOEXEC; 99 } 100 if (plusflag) { 101 oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR; 102 fflag = _IORW; 103 } 104 105 /* select small or large file open based on flag */ 106 if (largefile) { 107 fd = open64(name, oflag, 0666); 108 } else { 109 fd = open(name, oflag, 0666); 110 } 111 if (fd < 0) 112 return (NULL); 113 114 /* As long as we make sure _flag stays != 0, we don't need to lock */ 115 #ifdef _LP64 116 iop->_file = fd; 117 iop->_flag = (iop->_flag & ~0377) | fflag; 118 #else 119 if (fd <= _FILE_FD_MAX) { 120 SET_FILE(iop, fd); 121 } else if (_file_set(iop, fd, type) != 0) { 122 /* errno set in _file_set() */ 123 (void) close(fd); 124 return (NULL); 125 } 126 iop->_flag = fflag; 127 #endif /* _LP64 */ 128 129 if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) { /* type == "a" */ 130 if (lseek64(fd, (off64_t)0, SEEK_END) < (off64_t)0) { 131 (void) close(fd); 132 return (NULL); 133 } 134 } 135 136 return (iop); 137 } 138