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 /*
31 * Unix routine to do an "fopen" on file descriptor
32 * The mode has to be repeated because you can't query its
33 * status
34 */
35
36 #define _LARGEFILE64_SOURCE 1
37
38 #pragma weak _fdopen = fdopen
39
40 #include "lint.h"
41 #include <mtlib.h>
42 #include "file64.h"
43 #include <sys/types.h>
44 #include <unistd.h>
45 #include <stdio.h>
46 #include <limits.h>
47 #include <thread.h>
48 #include <synch.h>
49 #include "stdiom.h"
50 #include <errno.h>
51 #include <fcntl.h>
52
53 FILE *
fdopen(int fd,const char * type)54 fdopen(int fd, const char *type) /* associate file desc. with stream */
55 {
56 /* iop doesn't need locking since this function is creating it */
57 FILE *iop;
58 char plus;
59 unsigned char flag;
60
61 /* Sets EBADF for bad fds */
62 if (fcntl(fd, F_GETFD) == -1)
63 return (NULL);
64
65 if ((iop = _findiop()) == 0) {
66 errno = ENOMEM;
67 return (NULL);
68 }
69
70 switch (type[0]) {
71 default:
72 iop->_flag = 0; /* release iop */
73 errno = EINVAL;
74 return (NULL);
75 case 'r':
76 flag = _IOREAD;
77 break;
78 case 'a':
79 (void) lseek64(fd, (off64_t)0, SEEK_END);
80 /*FALLTHROUGH*/
81 case 'w':
82 flag = _IOWRT;
83 break;
84 }
85 if ((plus = type[1]) == 'b') /* Unix ignores 'b' ANSI std */
86 plus = type[2];
87 if (plus == '+')
88 flag = _IORW;
89 iop->_flag = flag;
90
91 #ifdef _LP64
92 iop->_file = fd;
93 #else
94 if (fd <= _FILE_FD_MAX) {
95 SET_FILE(iop, fd);
96 } else if (_file_set(iop, fd, type) != 0) {
97 /* errno set by _file_set () */
98 iop->_flag = 0; /* release iop */
99 return (NULL);
100 }
101 #endif /* _LP64 */
102
103 return (iop);
104 }
105