import less(1)
[unleashed/tickless.git] / usr / src / lib / libc / port / stdio / fdopen.c
blobf07d8b0a88faa9df36e41050109e30a1cd96eb2c
1 /*
2 * CDDL HEADER START
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.
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.
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]
19 * CDDL HEADER END
23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
27 /* Copyright (c) 1988 AT&T */
28 /* All Rights Reserved */
30 #pragma ident "%Z%%M% %I% %E% SMI"
33 * Unix routine to do an "fopen" on file descriptor
34 * The mode has to be repeated because you can't query its
35 * status
38 #define _LARGEFILE64_SOURCE 1
40 #pragma weak _fdopen = fdopen
42 #include "lint.h"
43 #include <mtlib.h>
44 #include "file64.h"
45 #include <sys/types.h>
46 #include <unistd.h>
47 #include <stdio.h>
48 #include <limits.h>
49 #include <thread.h>
50 #include <synch.h>
51 #include "stdiom.h"
52 #include <errno.h>
53 #include <fcntl.h>
55 FILE *
56 fdopen(int fd, const char *type) /* associate file desc. with stream */
58 /* iop doesn't need locking since this function is creating it */
59 FILE *iop;
60 char plus;
61 unsigned char flag;
63 /* Sets EBADF for bad fds */
64 if (fcntl(fd, F_GETFD) == -1)
65 return (NULL);
67 if ((iop = _findiop()) == 0) {
68 errno = ENOMEM;
69 return (NULL);
72 switch (type[0]) {
73 default:
74 iop->_flag = 0; /* release iop */
75 errno = EINVAL;
76 return (NULL);
77 case 'r':
78 flag = _IOREAD;
79 break;
80 case 'a':
81 (void) lseek64(fd, (off64_t)0, SEEK_END);
82 /*FALLTHROUGH*/
83 case 'w':
84 flag = _IOWRT;
85 break;
87 if ((plus = type[1]) == 'b') /* Unix ignores 'b' ANSI std */
88 plus = type[2];
89 if (plus == '+')
90 flag = _IORW;
91 iop->_flag = flag;
93 #ifdef _LP64
94 iop->_file = fd;
95 #else
96 if (fd <= _FILE_FD_MAX) {
97 SET_FILE(iop, fd);
98 } else if (_file_set(iop, fd, type) != 0) {
99 /* errno set by _file_set () */
100 iop->_flag = 0; /* release iop */
101 return (NULL);
103 #endif /* _LP64 */
105 return (iop);