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 #pragma ident "%Z%%M% %I% %E% SMI"
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 *
_endopen(const char * name,const char * type,FILE * iop,int largefile)56 _endopen(const char *name, const char *type, FILE *iop, int largefile)
57 {
58 int oflag, fd, fflag;
59 char plus;
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 /* UNIX ignores 'b' and treats text and binary the same */
81 if ((plus = type[1]) == 'b')
82 plus = type[2];
83 if (plus == '+') {
84 oflag = (oflag & ~(O_RDONLY | O_WRONLY)) | O_RDWR;
85 fflag = _IORW;
86 }
87
88 /* select small or large file open based on flag */
89 if (largefile) {
90 fd = open64(name, oflag, 0666);
91 } else {
92 fd = open(name, oflag, 0666);
93 }
94 if (fd < 0)
95 return (NULL);
96
97 /* As long as we make sure _flag stays != 0, we don't need to lock */
98 #ifdef _LP64
99 iop->_file = fd;
100 iop->_flag = (iop->_flag & ~0377) | fflag;
101 #else
102 if (fd <= _FILE_FD_MAX) {
103 SET_FILE(iop, fd);
104 } else if (_file_set(iop, fd, type) != 0) {
105 /* errno set in _file_set() */
106 (void) close(fd);
107 return (NULL);
108 }
109 iop->_flag = fflag;
110 #endif /* _LP64 */
111
112 if (oflag == (O_WRONLY | O_APPEND | O_CREAT)) { /* type == "a" */
113 if (lseek64(fd, (off64_t)0, SEEK_END) < (off64_t)0) {
114 (void) close(fd);
115 return (NULL);
116 }
117 }
118
119 return (iop);
120 }
121